├── .github └── workflows │ ├── main.yml │ └── on-pr.yml ├── .gitignore ├── .travis.yml ├── LICENSE ├── README.adoc ├── build.gradle.kts ├── buildSrc ├── build.gradle.kts ├── settings.gradle.kts └── src │ └── main │ └── kotlin │ ├── me.champeau.jlangdetect.java-conventions.gradle.kts │ ├── me.champeau.maven-central-publishing.gradle.kts │ └── me.champeau.publishing.gradle.kts ├── changelog └── CHANGELOG.txt ├── gradle.properties ├── gradle ├── libs.versions.toml └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── jlangdetect-europarl ├── build.gradle.kts └── src │ ├── main │ ├── java │ │ └── me │ │ │ └── champeau │ │ │ └── ld │ │ │ ├── EuroparlDetector.java │ │ │ └── learn │ │ │ └── util │ │ │ └── EuroparlLoader.java │ └── resources │ │ └── europarl-ld │ │ ├── bg_tree.bin │ │ ├── cs_tree.bin │ │ ├── da_tree.bin │ │ ├── de_tree.bin │ │ ├── el_tree.bin │ │ ├── en_tree.bin │ │ ├── es_tree.bin │ │ ├── et_tree.bin │ │ ├── fi_tree.bin │ │ ├── fr_tree.bin │ │ ├── hu_tree.bin │ │ ├── it_tree.bin │ │ ├── lt_tree.bin │ │ ├── lv_tree.bin │ │ ├── nl_tree.bin │ │ ├── pl_tree.bin │ │ ├── pt_tree.bin │ │ ├── ro_tree.bin │ │ ├── sk_tree.bin │ │ ├── sl_tree.bin │ │ └── sv_tree.bin │ └── test │ ├── java │ └── com │ │ └── champeau │ │ └── ld │ │ └── TestLangDetection.java │ └── resources │ └── logback.groovy ├── jlangdetect-extra ├── build.gradle.kts └── src │ ├── main │ ├── java │ │ └── me │ │ │ └── champeau │ │ │ └── ld │ │ │ └── UberLanguageDetector.java │ └── resources │ │ └── jlangdetect-extra │ │ ├── ja_tree.bin │ │ ├── ko_tree.bin │ │ ├── ru_tree.bin │ │ └── zh_tree.bin │ └── test │ ├── java │ └── com │ │ └── champeau │ │ └── ld │ │ └── UberLanguageDetectionTest.java │ └── resources │ └── logback.groovy ├── jlangdetect ├── build.gradle.kts └── src │ └── main │ └── java │ └── me │ └── champeau │ └── ld │ ├── AbstractGramTree.java │ ├── GramTreeBuilder.java │ ├── GramTreeImpl.java │ ├── LangDetector.java │ ├── NGramIterator.java │ ├── NGramTokenizer.java │ └── learn │ └── util │ ├── DirectoryLearning.java │ └── LearningException.java └── settings.gradle.kts /.github/workflows/main.yml: -------------------------------------------------------------------------------- 1 | name: Main 2 | on: 3 | push: 4 | branches: 5 | - master 6 | jobs: 7 | gradle: 8 | strategy: 9 | matrix: 10 | os: [ubuntu-latest] 11 | runs-on: ${{ matrix.os }} 12 | steps: 13 | - uses: actions/checkout@v2 14 | - uses: actions/setup-java@v1 15 | with: 16 | java-version: 8 17 | - uses: gradle/wrapper-validation-action@v1.0.3 18 | - uses: eskatos/gradle-command-action@v1 19 | with: 20 | arguments: build --scan 21 | wrapper-cache-enabled: true 22 | dependencies-cache-enabled: true 23 | configuration-cache-enabled: true 24 | -------------------------------------------------------------------------------- /.github/workflows/on-pr.yml: -------------------------------------------------------------------------------- 1 | name: Run Gradle on PRs 2 | on: [pull_request, push] 3 | jobs: 4 | gradle: 5 | strategy: 6 | matrix: 7 | os: [ubuntu-latest] 8 | runs-on: ${{ matrix.os }} 9 | steps: 10 | - uses: actions/checkout@v2 11 | - uses: actions/setup-java@v1 12 | with: 13 | java-version: 8 14 | - uses: gradle/wrapper-validation-action@v1.0.3 15 | - uses: eskatos/gradle-command-action@v1 16 | with: 17 | arguments: build --scan 18 | wrapper-cache-enabled: true 19 | dependencies-cache-enabled: true 20 | configuration-cache-enabled: true 21 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | **/build/ 2 | **/.gradle/ 3 | .idea/ 4 | *.iml 5 | *.ipr 6 | *.iws 7 | out/ 8 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: java 2 | 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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It is provided "as is". 6 | 7 | A language detection library for the JVM. 8 | 9 | == How to use it ? 10 | 11 | The simplest way to use JLangDetect is to use the _UberLanguageDetector_ singleton, available in the _jlangdetect-extra_ module : 12 | 13 | [source] 14 | ---- 15 | import me.champeau.ld.UberLanguageDetector; 16 | UberLanguageDetector detector = UberLanguageDetector.getInstance(); 17 | 18 | // .. 19 | 20 | String language = detector.detectLang("ceci est un petit texte en français"); 21 | 22 | ---- 23 | 24 | 25 | Alternatively, if you don’t need to detect russian, chinese, japanese or korean languages, you can use the _EuroparlDetector_ available in the _jlangdetect-europarl_ module. Note that you can still create your own language detector and register custom languages using the core module. 26 | 27 | Keep in mind that this package requires SLF4J to be referenced. 28 | 29 | == Maven integration 30 | 31 | JLangDetect is now available on Maven Central. 32 | 33 | Then use the following dependency : 34 | 35 | [source,xml] 36 | ---- 37 | 38 | me.champeau.jlangdetect 39 | jlangdetect-extra 40 | 0.6 41 | 42 | ---- 43 | 44 | or with Gradle: 45 | 46 | [source,groovy] 47 | ---- 48 | dependencies { 49 | implementation("me.champeau.jlangdetect:jlangdetect:0.6") 50 | } 51 | ---- 52 | 53 | == Use from Groovy 54 | 55 | As a last integration example, here is how to use it from Groovy, through a simple script : 56 | 57 | [source] 58 | ---- 59 | @Grab('me.champeau.jlangdetect:jlangdetect-extra:0.6') 60 | import me.champeau.ld.UberLanguageDetector as ULD 61 | 62 | ULD.instance.with { 63 | assert detectLang('ceci est un petit texte en français') == 'fr' 64 | assert detectLang('this is a text in english') == 'en' 65 | } 66 | 67 | ---- 68 | 69 | -------------------------------------------------------------------------------- /build.gradle.kts: -------------------------------------------------------------------------------- 1 | plugins { 2 | id("me.champeau.maven-central-publishing") 3 | } 4 | -------------------------------------------------------------------------------- /buildSrc/build.gradle.kts: -------------------------------------------------------------------------------- 1 | plugins { 2 | `kotlin-dsl` 3 | } 4 | 5 | repositories { 6 | mavenCentral() 7 | gradlePluginPortal() 8 | } 9 | 10 | dependencies { 11 | implementation(libs.plugins.nexus) 12 | } 13 | -------------------------------------------------------------------------------- /buildSrc/settings.gradle.kts: -------------------------------------------------------------------------------- 1 | dependencyResolutionManagement { 2 | versionCatalogs { 3 | create("libs") { 4 | from(files("../gradle/libs.versions.toml")) 5 | } 6 | } 7 | } 8 | -------------------------------------------------------------------------------- /buildSrc/src/main/kotlin/me.champeau.jlangdetect.java-conventions.gradle.kts: -------------------------------------------------------------------------------- 1 | plugins { 2 | `java-library` 3 | id("me.champeau.publishing") 4 | } 5 | 6 | group = "me.champeau.jlangdetect" 7 | version = "0.6.1-SNAPSHOT" 8 | 9 | java { 10 | withSourcesJar() 11 | withJavadocJar() 12 | toolchain { 13 | languageVersion.set(JavaLanguageVersion.of(8)) 14 | } 15 | } 16 | 17 | tasks.test { 18 | useTestNG() 19 | } 20 | -------------------------------------------------------------------------------- /buildSrc/src/main/kotlin/me.champeau.maven-central-publishing.gradle.kts: -------------------------------------------------------------------------------- 1 | plugins { 2 | id("io.github.gradle-nexus.publish-plugin") 3 | } 4 | 5 | group = "me.champeau.jlangdetect" 6 | 7 | nexusPublishing { 8 | repositories { 9 | sonatype { 10 | username.set(providers.systemProperty("central.username").forUseAtConfigurationTime()) 11 | password.set(providers.systemProperty("central.password").forUseAtConfigurationTime()) 12 | } 13 | } 14 | } -------------------------------------------------------------------------------- /buildSrc/src/main/kotlin/me.champeau.publishing.gradle.kts: -------------------------------------------------------------------------------- 1 | import org.gradle.api.publish.maven.MavenPublication 2 | import org.gradle.kotlin.dsl.get 3 | import org.gradle.api.publish.maven.MavenPom 4 | 5 | /* 6 | * Copyright 2021 the original author or authors. 7 | * 8 | * Licensed under the Apache License, Version 2.0 (the "License"); 9 | * you may not use this file except in compliance with the License. 10 | * You may obtain a copy of the License at 11 | * 12 | * http://www.apache.org/licenses/LICENSE-2.0 13 | * 14 | * Unless required by applicable law or agreed to in writing, software 15 | * distributed under the License is distributed on an "AS IS" BASIS, 16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 | * See the License for the specific language governing permissions and 18 | * limitations under the License. 19 | */ 20 | plugins { 21 | `maven-publish` 22 | signing 23 | } 24 | 25 | group = "me.champeau.jlangdetect" 26 | 27 | publishing { 28 | repositories { 29 | maven { 30 | name = "projectLocal" 31 | url = uri("${rootProject.buildDir}/repo") 32 | } 33 | } 34 | publications { 35 | plugins.withId("java-library") { 36 | create("maven") { 37 | from(components["java"]) 38 | pom.addRequiredMetadataForPublicationOnMavenCentral() 39 | } 40 | } 41 | plugins.withId("java-platform") { 42 | create("maven") { 43 | from(components["javaPlatform"]) 44 | pom.addRequiredMetadataForPublicationOnMavenCentral() 45 | } 46 | } 47 | } 48 | } 49 | 50 | signing { 51 | setRequired { 52 | gradle.taskGraph.allTasks.any { 53 | it.name.startsWith("publish") 54 | } 55 | } 56 | publishing.publications.configureEach { 57 | sign(this) 58 | } 59 | useGpgCmd() 60 | } 61 | 62 | // Follow the requirements described at https://central.sonatype.org/pages/requirements.html 63 | // (which assume that POM is the king) 64 | fun MavenPom.addRequiredMetadataForPublicationOnMavenCentral() { 65 | name.set(providers.provider { "${project.group}:${project.name}" }) 66 | description.set(providers.provider { project.description }) 67 | url.set("https://github.com/melix/jlangdetect") 68 | licenses { 69 | license { 70 | name.set("The Apache Software License, Version 2.0") 71 | url.set("http://www.apache.org/licenses/LICENSE-2.0.txt") 72 | } 73 | } 74 | 75 | developers { 76 | developer { 77 | name.set("Cédric Champeau") 78 | email.set("cedric.champeau@gmail.com") 79 | organization.set("Personal") 80 | organizationUrl.set("https://github.com/melix") 81 | } 82 | } 83 | 84 | scm { 85 | connection.set("scm:git:git://github.com/melix/jlangdetect.git") 86 | developerConnection.set("scm:git:ssh://github.com/melix/jlangdetect.git") 87 | url.set("https://github.com/melix/jlangdetect/tree/master") 88 | } 89 | } 90 | 91 | fun isSnapshot() = (version as String).endsWith("-SNAPSHOT") -------------------------------------------------------------------------------- /changelog/CHANGELOG.txt: -------------------------------------------------------------------------------- 1 | ############################################## 2 | # Project JLangDetect # 3 | # See http://code.google.com/p/jlangdetect/ # 4 | ############################################## 5 | 6 | 7 | Changes in version 0.4 8 | ---------------------- 9 | 10 | Issue #1 switch from log4j to SLF4J 11 | Issue #4 Returns null if all scores are 0 12 | Issue #5 Make Score fields accessible -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | org.gradle.parallel=true 2 | -------------------------------------------------------------------------------- /gradle/libs.versions.toml: -------------------------------------------------------------------------------- 1 | [versions] 2 | nexus = "1.0.0" 3 | 4 | [libraries] 5 | slf4j="org.slf4j:slf4j-api:1.7.30" 6 | testng="org.testng:testng:7.4.0" 7 | logbackClassic="ch.qos.logback:logback-classic:1.0.13" 8 | janino="org.codehaus.janino:janino:2.6.1" 9 | 10 | plugins-nexus = { module = "io.github.gradle-nexus:publish-plugin", version.ref = "nexus"} 11 | 12 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/melix/jlangdetect/179fe8655cccee1586d128f98e7ef37bd69bb3c9/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | 86 | # Determine the Java command to use to start the JVM. 87 | if [ -n "$JAVA_HOME" ] ; then 88 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 89 | # IBM's JDK on AIX uses strange locations for the executables 90 | JAVACMD="$JAVA_HOME/jre/sh/java" 91 | else 92 | JAVACMD="$JAVA_HOME/bin/java" 93 | fi 94 | if [ ! -x "$JAVACMD" ] ; then 95 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 96 | 97 | Please set the JAVA_HOME variable in your environment to match the 98 | location of your Java installation." 99 | fi 100 | else 101 | JAVACMD="java" 102 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 103 | 104 | Please set the JAVA_HOME variable in your environment to match the 105 | location of your Java installation." 106 | fi 107 | 108 | # Increase the maximum file descriptors if we can. 109 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 110 | MAX_FD_LIMIT=`ulimit -H -n` 111 | if [ $? -eq 0 ] ; then 112 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 113 | MAX_FD="$MAX_FD_LIMIT" 114 | fi 115 | ulimit -n $MAX_FD 116 | if [ $? -ne 0 ] ; then 117 | warn "Could not set maximum file descriptor limit: $MAX_FD" 118 | fi 119 | else 120 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 121 | fi 122 | fi 123 | 124 | # For Darwin, add options to specify how the application appears in the dock 125 | if $darwin; then 126 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 127 | fi 128 | 129 | # For Cygwin or MSYS, switch paths to Windows format before running java 130 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 131 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 132 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 133 | 134 | JAVACMD=`cygpath --unix "$JAVACMD"` 135 | 136 | # We build the pattern for arguments to be converted via cygpath 137 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 138 | SEP="" 139 | for dir in $ROOTDIRSRAW ; do 140 | ROOTDIRS="$ROOTDIRS$SEP$dir" 141 | SEP="|" 142 | done 143 | OURCYGPATTERN="(^($ROOTDIRS))" 144 | # Add a user-defined pattern to the cygpath arguments 145 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 146 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 147 | fi 148 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 149 | i=0 150 | for arg in "$@" ; do 151 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 152 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 153 | 154 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 155 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 156 | else 157 | eval `echo args$i`="\"$arg\"" 158 | fi 159 | i=`expr $i + 1` 160 | done 161 | case $i in 162 | 0) set -- ;; 163 | 1) set -- "$args0" ;; 164 | 2) set -- "$args0" "$args1" ;; 165 | 3) set -- "$args0" "$args1" "$args2" ;; 166 | 4) set -- "$args0" "$args1" "$args2" "$args3" ;; 167 | 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 168 | 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 169 | 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 170 | 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 171 | 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 172 | esac 173 | fi 174 | 175 | # Escape application args 176 | save () { 177 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 178 | echo " " 179 | } 180 | APP_ARGS=`save "$@"` 181 | 182 | # Collect all arguments for the java command, following the shell quoting and substitution rules 183 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 184 | 185 | exec "$JAVACMD" "$@" 186 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if "%ERRORLEVEL%"=="0" goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 84 | exit /b 1 85 | 86 | :mainEnd 87 | if "%OS%"=="Windows_NT" endlocal 88 | 89 | :omega 90 | -------------------------------------------------------------------------------- /jlangdetect-europarl/build.gradle.kts: -------------------------------------------------------------------------------- 1 | plugins { 2 | id("me.champeau.jlangdetect.java-conventions") 3 | } 4 | 5 | dependencies { 6 | implementation(libs.slf4j) 7 | api(project(":jlangdetect")) 8 | testImplementation(libs.testng) 9 | testImplementation(libs.janino) 10 | testRuntimeOnly(libs.logbackClassic) 11 | } 12 | 13 | description = "JLangDetect Europarl" 14 | -------------------------------------------------------------------------------- /jlangdetect-europarl/src/main/java/me/champeau/ld/EuroparlDetector.java: -------------------------------------------------------------------------------- 1 | package me.champeau.ld; 2 | /** 3 | * Created by IntelliJ IDEA. 4 | * User: cedric 5 | * Date: 26/06/11 6 | * Time: 22:35 7 | */ 8 | 9 | 10 | import org.slf4j.Logger; 11 | import org.slf4j.LoggerFactory; 12 | 13 | import java.io.BufferedInputStream; 14 | import java.io.IOException; 15 | import java.io.ObjectInputStream; 16 | 17 | /** 18 | * An extension of the language detector which automatically loads europarl resources from classpath, thus supports 19 | * detecting the language of documents in the following languages : 20 | * 43 | *

44 | * The detector has been trained thanks to the resources available from http://www.statmt.org/europarl/. 45 | *

46 | * See Europarl: A Parallel Corpus for Statistical Machine Translation, Philipp Koehn, MT Summit 2005 47 | * 48 | * @author Cedric Champeau 49 | */ 50 | public class EuroparlDetector extends LangDetector { 51 | private final static Logger theLogger = LoggerFactory.getLogger(EuroparlDetector.class); 52 | 53 | private final static String[] EUROPARL_LANGUAGES = { 54 | "bg", 55 | "cs", 56 | "da", 57 | "de", 58 | "el", 59 | "en", 60 | "es", 61 | "et", 62 | "fi", 63 | "fr", 64 | "hu", 65 | "it", 66 | "lt", 67 | "lv", 68 | "nl", 69 | "pl", 70 | "pt", 71 | "ro", 72 | "sk", 73 | "sl", 74 | "sv" 75 | }; 76 | 77 | private final static EuroparlDetector INSTANCE = new EuroparlDetector(); 78 | 79 | protected EuroparlDetector() { 80 | super(); 81 | ClassLoader loader = EuroparlDetector.class.getClassLoader(); 82 | for (String lang : EUROPARL_LANGUAGES) { 83 | try { 84 | register(lang, new ObjectInputStream(new BufferedInputStream(loader.getResourceAsStream("europarl-ld/" +lang+"_tree.bin")))); 85 | } catch (IOException e) { 86 | theLogger.warn("Unable to read Europarl resources for language "+lang); 87 | } 88 | } 89 | } 90 | 91 | public static EuroparlDetector getInstance() { 92 | return INSTANCE; 93 | } 94 | 95 | @Override 96 | public void register(final String lang, final AbstractGramTree tree) { 97 | if (INSTANCE!=null) throw new IllegalStateException("Cannot add languages to Europarl detector once loaded"); 98 | super.register(lang, tree); 99 | } 100 | 101 | @Override 102 | public void register(final String lang, final ObjectInputStream in) { 103 | if (INSTANCE!=null) throw new IllegalStateException("Cannot add languages to Europarl detector once loaded"); 104 | super.register(lang, in); 105 | } 106 | } 107 | -------------------------------------------------------------------------------- /jlangdetect-europarl/src/main/java/me/champeau/ld/learn/util/EuroparlLoader.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Licensed to the Apache Software Foundation (ASF) under one or more 3 | * contributor license agreements. See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | * 17 | * 18 | */ 19 | 20 | package me.champeau.ld.learn.util; 21 | 22 | import me.champeau.ld.AbstractGramTree; 23 | import me.champeau.ld.GramTreeBuilder; 24 | import me.champeau.ld.LangDetector; 25 | import org.slf4j.Logger; 26 | import org.slf4j.LoggerFactory; 27 | 28 | import java.io.*; 29 | import java.util.concurrent.*; 30 | import java.util.List; 31 | import java.util.LinkedList; 32 | import java.util.Map; 33 | 34 | /** 35 | * Parses the Europarl corpus (http://www.statmt.org/europarl/). This corpus consists of (parallel) translations 36 | * of European Parliament proceedings for the 1996-2006 period. It is a perfect candidate for our learning 37 | * algorithm, with up to 44 million words per language. 38 | * 39 | * Training takes less than 1 minute/language on my computer, with a quad core processor. The loader has been optimized 40 | * for multi-core systems. 41 | * 42 | */ 43 | public class EuroparlLoader { 44 | private final static Logger theLogger = LoggerFactory.getLogger(EuroparlLoader.class); 45 | 46 | /** 47 | * Reads a single EPPPC file, strips XML lines and returns a single string containing raw text. 48 | * @param aFile a EPPPC text file, encoded in UTF-8. 49 | * @return raw text 50 | */ 51 | private static String readSingleFile(File aFile) { 52 | StringBuilder sb = new StringBuilder(); 53 | try { 54 | BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(aFile), "UTF-8")); 55 | String line; 56 | while ((line = reader.readLine()) != null) { 57 | if (!line.startsWith("<")) { 58 | sb.append(line).append('\n'); 59 | } 60 | } 61 | reader.close(); 62 | } catch (IOException e) { 63 | theLogger.error("Unable to read file : " + aFile); 64 | return null; 65 | } 66 | return sb.toString(); 67 | } 68 | 69 | /** 70 | * Returns a map (lang code -> gram tree) of gram trees 71 | * @param srcDir source directory where to find language specific directories 72 | * @param dstDir output directory for compiled n-grams trees 73 | * @param langs list of languages to be compiled 74 | * @return the map of trees 75 | */ 76 | private static Map readCorpus(final File srcDir, final File dstDir, String[] langs) { 77 | int threads = Runtime.getRuntime().availableProcessors(); 78 | ExecutorService service = Executors.newFixedThreadPool(threads); 79 | theLogger.info("Parallel processing of "+threads+" languages over "+langs.length+"..."); 80 | List> tasks = new LinkedList>(); 81 | final Map trees = new ConcurrentHashMap(); 82 | for (final String lang : langs) { 83 | tasks.add(service.submit(new Runnable() { 84 | public void run() { 85 | theLogger.info("Processing directory " + lang); 86 | GramTreeBuilder tree = new GramTreeBuilder(1, 3); 87 | tree.setTruncationThreshold(0.1d); 88 | File sourceFiles = new File(srcDir, lang); 89 | File[] files = sourceFiles.listFiles(); 90 | int cpt = 0; 91 | for (File file : files) { 92 | tree.learn(readSingleFile(file)); 93 | cpt++; 94 | if (cpt % 20 == 0) { 95 | theLogger.info("Processed " + (100 * cpt / files.length) + "% of " + lang); 96 | } 97 | } 98 | final AbstractGramTree build = tree.build(); 99 | trees.put(lang, build); 100 | theLogger.info("Saving tree : "+lang); 101 | File dst = new File(dstDir, lang+"_tree.bin"); 102 | try { 103 | ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(dst))); 104 | out.writeObject(build); 105 | out.close(); 106 | } catch (IOException e) { 107 | theLogger.error("Unable to write lang tree "+lang,e); 108 | } 109 | theLogger.info("Lang "+ lang+" complete !"); 110 | } 111 | })); 112 | } 113 | // passive wait 114 | for (Future task : tasks) { 115 | try { 116 | task.get(); 117 | } catch (InterruptedException e) { 118 | e.printStackTrace(); 119 | } catch (ExecutionException e) { 120 | e.printStackTrace(); 121 | } 122 | } 123 | service.shutdown(); 124 | return trees; 125 | } 126 | 127 | public static void main(String[] args) { 128 | if (args.length != 2) { 129 | System.out.println("Usage : java " + EuroparlLoader.class.getCanonicalName() + " "); 130 | System.exit(-1); 131 | } 132 | File srcDir = new File(args[0]); 133 | File dstDir = new File(args[1]); 134 | dstDir.mkdirs(); 135 | final String[] langs = srcDir.list(); 136 | LangDetector detector = new LangDetector(); 137 | Map trees = readCorpus(srcDir, dstDir, langs); 138 | for (Map.Entry entry : trees.entrySet()) { 139 | detector.register(entry.getKey(), entry.getValue()); 140 | } 141 | } 142 | 143 | /** 144 | public static void main(String[] args) throws IOException, ClassNotFoundException { 145 | File in = new File(args[0]); 146 | LangDetector detector = new LangDetector(); 147 | for (File file : in.listFiles()) { 148 | ObjectInputStream ois = new ObjectInputStream(new BufferedInputStream(new FileInputStream(file))); 149 | 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See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | * 17 | * 18 | */ 19 | 20 | package com.champeau.ld; 21 | 22 | import me.champeau.ld.AbstractGramTree; 23 | import me.champeau.ld.EuroparlDetector; 24 | import me.champeau.ld.LangDetector; 25 | import org.testng.annotations.Test; 26 | 27 | import java.io.IOException; 28 | import java.util.Collection; 29 | 30 | import static org.testng.Assert.assertEquals; 31 | import static org.testng.Assert.assertNull; 32 | /** 33 | * User: cedric 34 | * Date: 21 sept. 2008 35 | * Time: 16:19:48 36 | */ 37 | 38 | /** 39 | * A very simple test class aimed at testing that simple Europarl learning should be sufficient for regular 40 | * european languages. 41 | */ 42 | public class TestLangDetection { 43 | 44 | @Test 45 | public void shouldDetectLanguages() { 46 | String[][] texts = new String[][] { 47 | new String[] {"un texte en français","fr"}, 48 | new String[] {"a text in english","en"}, 49 | new String[] {"un texto en español","es"}, 50 | new String[] {"un texte un peu plus long en français","fr"}, 51 | new String[] {"a text a little longer in english","en"}, 52 | new String[] {"a little longer text in english","en"}, 53 | new String[] {"un texto un poco más largo en español","es"}, 54 | new String[] {"J'aime les bisounours !","fr"}, 55 | new String[] {"Bienvenue à Montmartre !", "fr"}, 56 | new String[] {"Welcome to London !", "en"}, 57 | new String[] {"un piccolo testo in italiano", "it"}, 58 | new String[] {"Du kan blive medlem ved at melde dig ind her.", "da"}, 59 | new String[] {"Kaasotsustamismenetlusel vastu võetud aktide allkirjastamine", "et"}, 60 | new String[] {"μια μικρή ελληνική γλώσσα", "el"}, 61 | new String[] {"На 16 юни в 11.00 ч. сутринта местно време в щата Аляска, САЩ, е усетено", "bg"}, 62 | new String[] {"Směrnice navíc zakáže nadstandardní zpoplatnění tzv. zákaznických linek.", "cs"}, 63 | new String[] {"Emellett igény fogalmazódott meg az iparági önszabályozási és belső konfliktuskezelési, valamint a magyar vasút külföldi vasutak szervezeteivel fennálló kapcsolat-tartási feladatok ellátására is.", "hu"}, 64 | new String[] {"een kleine Nederlandse tekst", "nl"}, 65 | new String[] {"Matching sur des lexiques", "fr"}, 66 | new String[] {"Tarybos perduoti susitarimų tekstai", "lt"}, 67 | new String[] {"Koplēmuma procedūrā pieņemto tiesību aktu", "lv"}, 68 | new String[] {"Utworzenie komisji śledczej i komisji tymczasowej", "pl"}, 69 | new String[] {"Cursul dat rezoluţiilor Parlamentului: a se vedea procesul-verbal", "ro"}, 70 | new String[] {"Skončenie rokovania", "sk"}, 71 | new String[] {"Fru talman! Rörande en ordningsfråga.", "sv"}, 72 | new String[] {"Homofobija v Evropi", "sl"}, 73 | new String[] {"Matching on lexicons", "en"}, 74 | new String[] {"Une première optimisation consiste à ne tester que les sous-chaînes de taille compatibles avec le lexique.", "fr"}, 75 | new String[] {"A otimização é a primeira prova de que não sub-canais compatível com o tamanho do léxico.", "pt"}, 76 | new String[] {"Ensimmäinen optimointi ei pidä testata, että osa-kanavien kanssa koko sanakirja.", "fi"}, 77 | }; 78 | 79 | EuroparlDetector detector = EuroparlDetector.getInstance(); 80 | 81 | for (String[] text : texts) { 82 | String det = detector.detectLang(text[0]); 83 | System.out.println("langof(\""+text[0]+"\") = " + det + " : " + (det.equals(text[1])?"OK":"Error")); 84 | assertEquals(det,text[1]); 85 | } 86 | 87 | } 88 | 89 | @Test 90 | public void shouldReturnNullIfNoScore() { 91 | EuroparlDetector detector = EuroparlDetector.getInstance(); 92 | String det = detector.detectLang(""); 93 | assertNull(det); 94 | } 95 | 96 | @Test 97 | public void testScores() { 98 | final Collection scores = EuroparlDetector.getInstance().scoreLanguages("马兜铃猪笼草是苏门答腊特有的热带食虫植物，其种加词“类似于马兜铃”，指该猪笼草捕虫笼的形状和颜色都非常近似于马兜铃的花朵。其生长于海拔1800至2500米的地区。1956年8月5日，威廉·梅哲在占碑省的土朱山上首次采集到了马兜铃猪笼草。但直到1988年约阿希姆·那兹访问莱顿大学植物标本馆后，该标本才被注意到。1994年，其最终被命名为马兜铃猪笼草。马兜铃猪笼草的叶片革质，无柄，呈线形、披针形或匙形－披针形，可长达20厘米，宽至5厘米。叶片末端为急尖或钝尖，中脉的两侧各有2条纵脉。羽状脉呈不规则的网状，笼蔓长达15厘米。马兜铃猪笼草的花序为总状花序，可长达30厘米。总花梗和花序轴都可长达15厘米，通常雌性花序较短。花梗具小苞片，带一朵花，可长达12毫米。马兜铃猪笼草已被列入《2006年世界自然保护联盟濒危物种红色名录》中，保护状况为极危。"); 99 | for (LangDetector.Score score : scores) { 100 | System.out.println("Score ["+score.getLanguage()+"]"+" = "+score.getScore()); 101 | } 102 | } 103 | 104 | @Test(expectedExceptions = IllegalStateException.class) 105 | public void shouldFailRegisteringLanguage() { 106 | EuroparlDetector.getInstance().register("lang", new AbstractGramTree(0,0,0) {}); 107 | } 108 | } 109 | -------------------------------------------------------------------------------- /jlangdetect-europarl/src/test/resources/logback.groovy: -------------------------------------------------------------------------------- 1 | root(INFO, ["CONSOLE"]) 2 | -------------------------------------------------------------------------------- /jlangdetect-extra/build.gradle.kts: -------------------------------------------------------------------------------- 1 | plugins { 2 | id("me.champeau.jlangdetect.java-conventions") 3 | } 4 | 5 | dependencies { 6 | api(project(":jlangdetect")) 7 | implementation(project(":jlangdetect-europarl")) 8 | implementation(libs.slf4j) 9 | testImplementation(libs.testng) 10 | testImplementation(libs.janino) 11 | testRuntimeOnly(libs.logbackClassic) 12 | } 13 | 14 | description = "JLangDetect extras" 15 | -------------------------------------------------------------------------------- /jlangdetect-extra/src/main/java/me/champeau/ld/UberLanguageDetector.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Licensed to the Apache Software Foundation (ASF) under one or more 3 | * contributor license agreements. See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | */ 17 | 18 | package me.champeau.ld; 19 | /** 20 | * Created by IntelliJ IDEA. 21 | * User: cedric 22 | * Date: 27/06/11 23 | * Time: 09:51 24 | */ 25 | 26 | 27 | import org.slf4j.Logger; 28 | import org.slf4j.LoggerFactory; 29 | 30 | import java.io.BufferedInputStream; 31 | import java.io.IOException; 32 | import java.io.ObjectInputStream; 33 | 34 | /** 35 | * A language detector which includes the {@link EuroparlDetector Europarl detection resources} plus extra languages : 36 | *

42 | * 43 | * The extra languages have been learnt thanks to the Project Gutenberg (www.gutenberg.org) resources which are not 44 | * sufficient for excellent accuracy but should be enough for most needs. 45 | * 46 | * Note that due to the lack of royalty-free corpora, those language profiles are subject to caution. For example, 47 | * russian and bulgarian can look very similar, and the detector is likely to fail. 48 | * 49 | */ 50 | public class UberLanguageDetector extends LangDetector { 51 | private final static Logger theLogger = LoggerFactory.getLogger(UberLanguageDetector.class); 52 | 53 | public final static String[] EXTRA_LANGUAGES = {"ru","zh","ja","ko"}; 54 | private final static UberLanguageDetector INSTANCE = new UberLanguageDetector(); 55 | 56 | 57 | protected UberLanguageDetector() { 58 | super(EuroparlDetector.getInstance()); 59 | ClassLoader loader = EuroparlDetector.class.getClassLoader(); 60 | for (String lang : EXTRA_LANGUAGES) { 61 | try { 62 | register(lang, new ObjectInputStream(new BufferedInputStream(loader.getResourceAsStream("jlangdetect-extra/" + lang + "_tree.bin")))); 63 | } catch (IOException e) { 64 | theLogger.warn("Unable to read Europarl resources for language " + lang); 65 | } 66 | } 67 | } 68 | 69 | public static UberLanguageDetector getInstance() { 70 | return INSTANCE; 71 | } 72 | 73 | @Override 74 | public void register(final String lang, final AbstractGramTree tree) { 75 | if (INSTANCE!=null) throw new IllegalStateException("Cannot add languages to Europarl detector once loaded"); 76 | super.register(lang, tree); 77 | } 78 | 79 | @Override 80 | public void register(final String lang, final ObjectInputStream in) { 81 | if (INSTANCE!=null) throw new IllegalStateException("Cannot add languages to Europarl detector once loaded"); 82 | super.register(lang, in); 83 | } 84 | 85 | } 86 | -------------------------------------------------------------------------------- /jlangdetect-extra/src/main/resources/jlangdetect-extra/ja_tree.bin: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/melix/jlangdetect/179fe8655cccee1586d128f98e7ef37bd69bb3c9/jlangdetect-extra/src/main/resources/jlangdetect-extra/ja_tree.bin -------------------------------------------------------------------------------- /jlangdetect-extra/src/main/resources/jlangdetect-extra/ko_tree.bin: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/melix/jlangdetect/179fe8655cccee1586d128f98e7ef37bd69bb3c9/jlangdetect-extra/src/main/resources/jlangdetect-extra/ko_tree.bin -------------------------------------------------------------------------------- /jlangdetect-extra/src/main/resources/jlangdetect-extra/ru_tree.bin: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/melix/jlangdetect/179fe8655cccee1586d128f98e7ef37bd69bb3c9/jlangdetect-extra/src/main/resources/jlangdetect-extra/ru_tree.bin -------------------------------------------------------------------------------- /jlangdetect-extra/src/main/resources/jlangdetect-extra/zh_tree.bin: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/melix/jlangdetect/179fe8655cccee1586d128f98e7ef37bd69bb3c9/jlangdetect-extra/src/main/resources/jlangdetect-extra/zh_tree.bin -------------------------------------------------------------------------------- /jlangdetect-extra/src/test/java/com/champeau/ld/UberLanguageDetectionTest.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Licensed to the Apache Software Foundation (ASF) under one or more 3 | * contributor license agreements. See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | */ 17 | 18 | package com.champeau.ld; 19 | 20 | import me.champeau.ld.AbstractGramTree; 21 | import me.champeau.ld.LangDetector; 22 | import me.champeau.ld.UberLanguageDetector; 23 | import org.testng.annotations.Test; 24 | 25 | import java.util.Collection; 26 | 27 | import static org.testng.Assert.assertEquals; 28 | /** 29 | * User: cedric 30 | * Date: 21 sept. 2008 31 | * Time: 16:19:48 32 | */ 33 | 34 | /** 35 | * A very simple test class aimed at testing the UberLangDetector. 36 | */ 37 | public class UberLanguageDetectionTest { 38 | 39 | @Test 40 | public void shouldDetectLanguages() { 41 | String[][] texts = new String[][] { 42 | new String[] {"un texte en français","fr"}, 43 | new String[] {"a text in english","en"}, 44 | new String[] {"un texto en español","es"}, 45 | new String[] {"un texte un peu plus long en français","fr"}, 46 | new String[] {"a text a little longer in english","en"}, 47 | new String[] {"a little longer text in english","en"}, 48 | new String[] {"un texto un poco más largo en español","es"}, 49 | new String[] {"J'aime les bisounours !","fr"}, 50 | new String[] {"Bienvenue à Montmartre !", "fr"}, 51 | new String[] {"Welcome to London !", "en"}, 52 | new String[] {"un piccolo testo in italiano", "it"}, 53 | new String[] {"Du kan blive medlem ved at melde dig ind her.", "da"}, 54 | new String[] {"Kaasotsustamismenetlusel vastu võetud aktide allkirjastamine", "et"}, 55 | new String[] {"μια μικρή ελληνική γλώσσα", "el"}, 56 | new String[] {"На 16 юни в 11.00 ч. сутринта местно време в щата Аляска, САЩ, е усетено", "bg"}, 57 | new String[] {"Směrnice navíc zakáže nadstandardní zpoplatnění tzv. zákaznických linek.", "cs"}, 58 | new String[] {"Emellett igény fogalmazódott meg az iparági önszabályozási és belső konfliktuskezelési, valamint a magyar vasút külföldi vasutak szervezeteivel fennálló kapcsolat-tartási feladatok ellátására is.", "hu"}, 59 | new String[] {"een kleine Nederlandse tekst", "nl"}, 60 | new String[] {"Matching sur des lexiques", "fr"}, 61 | new String[] {"Tarybos perduoti susitarimų tekstai", "lt"}, 62 | new String[] {"Koplēmuma procedūrā pieņemto tiesību aktu", "lv"}, 63 | new String[] {"Utworzenie komisji śledczej i komisji tymczasowej", "pl"}, 64 | new String[] {"Cursul dat rezoluţiilor Parlamentului: a se vedea procesul-verbal", "ro"}, 65 | new String[] {"Skončenie rokovania", "sk"}, 66 | new String[] {"Fru talman! Rörande en ordningsfråga.", "sv"}, 67 | new String[] {"Homofobija v Evropi", "sl"}, 68 | new String[] {"Matching on lexicons", "en"}, 69 | new String[] {"Une première optimisation consiste à ne tester que les sous-chaînes de taille compatibles avec le lexique.", "fr"}, 70 | new String[] {"A otimização é a primeira prova de que não sub-canais compatível com o tamanho do léxico.", "pt"}, 71 | new String[] {"Ensimmäinen optimointi ei pidä testata, että osa-kanavien kanssa koko sanakirja.", "fi"}, 72 | new String[] {"您好", "zh"}, 73 | new String[] {"端午节", "zh"}, 74 | new String[] {"6月24日，欧盟成员国领导人任命意大利中央銀行行长馬里奧·德拉吉（图）為下一任歐洲中央銀行行長，以接替10月底离任的让-克洛德·特里谢。", "zh"}, 75 | new String[] {"ウィキペディアはオープンコンテントの百科事典です。方針に賛同していただけるなら、誰でも記事を編集したり新しく作成したりできます。ガイドブックを読んでから、サンドボックスで練習してみましょう。質問は利用案内でどうぞ", "ja"}, 76 | new String[] {"松本サリン事件（1994年）", "ja"}, 77 | new String[] {"В Госдуму внесён законопроект о службе в органах внутренних дел", "ru"}, 78 | new String[] {"Виктор Христенко назначен специальным представителем Президента по вопросу внесения изменений в Договор о Комиссии Таможенного союза", "ru"}, 79 | new String[] {"Виктор", "ru"}, 80 | new String[] {"여기로 연결됩니다. 다른 뜻에 대해서는", "ko"}, 81 | }; 82 | 83 | UberLanguageDetector detector = UberLanguageDetector.getInstance(); 84 | 85 | for (String[] text : texts) { 86 | String det = detector.detectLang(text[0]); 87 | System.out.println("langof(\""+text[0]+"\") = " + det + " : " + (det.equals(text[1])?"OK":"Error")); 88 | assertEquals(det,text[1]); 89 | } 90 | 91 | } 92 | 93 | @Test 94 | public void testScores() { 95 | final Collection scores = UberLanguageDetector.getInstance().scoreLanguages( 96 | "Виктор" 97 | ); 98 | System.out.println("scores = " + scores); 99 | } 100 | 101 | @Test(expectedExceptions = IllegalStateException.class) 102 | public void shouldFailRegisteringLanguage() { 103 | UberLanguageDetector.getInstance().register("lang", new AbstractGramTree(0,0,0) {}); 104 | } 105 | } 106 | -------------------------------------------------------------------------------- /jlangdetect-extra/src/test/resources/logback.groovy: -------------------------------------------------------------------------------- 1 | root(INFO, ["CONSOLE"]) 2 | -------------------------------------------------------------------------------- /jlangdetect/build.gradle.kts: -------------------------------------------------------------------------------- 1 | plugins { 2 | id("me.champeau.jlangdetect.java-conventions") 3 | } 4 | 5 | description = "Java Language Detector" 6 | 7 | dependencies { 8 | implementation(libs.slf4j) 9 | } -------------------------------------------------------------------------------- /jlangdetect/src/main/java/me/champeau/ld/AbstractGramTree.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Licensed to the Apache Software Foundation (ASF) under one or more 3 | * contributor license agreements. See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | * 17 | * 18 | */ 19 | 20 | package me.champeau.ld; 21 | 22 | import org.slf4j.Logger; 23 | import org.slf4j.LoggerFactory; 24 | 25 | import java.io.Serializable; 26 | 27 | /** 28 | * A gram tree is used to learn n-grams from texts, and is able to score a text. 29 | * The n-gram data is represented as a lexical tree. The representation is rather compact, but one 30 | * could do better with annotated-DFAs. 31 | * 32 | * Not thread-safe. 33 | * 34 | */ 35 | public abstract class AbstractGramTree implements Serializable { 36 | private final static Logger theLogger = LoggerFactory.getLogger(AbstractGramTree.class); 37 | 38 | private static final long serialVersionUID = 3284917449023378874L; 39 | protected AbstractNode root; 40 | protected long gramcount; 41 | protected int min; 42 | protected int max; 43 | 44 | protected AbstractGramTree(int min, int max) { 45 | this.max = max; 46 | this.min = min; 47 | gramcount = 0; 48 | } 49 | 50 | protected AbstractGramTree(int min, int max, long gramcount) { 51 | this.max = max; 52 | this.min = min; 53 | this.gramcount = gramcount; 54 | } 55 | 56 | /** 57 | * Returns a score for the input sequence against this n-gram tree. 58 | * 59 | * @param text the text to be checked 60 | * @return a score 61 | */ 62 | public double scoreText(CharSequence text) { 63 | NGramTokenizer tokenizer = new NGramTokenizer(text, min, max); 64 | double tot = 0; 65 | for (CharSequence charSequence : tokenizer) { 66 | double s = scoreGram(charSequence); 67 | if (theLogger.isDebugEnabled()) { 68 | theLogger.debug(charSequence + " scores " + s); 69 | } 70 | tot += s; 71 | } 72 | double score = tot / Math.log(gramcount); 73 | if (theLogger.isDebugEnabled()) { 74 | theLogger.debug(text + ", total " + tot + "/" + Math.log(gramcount) + "=" + score); 75 | } 76 | return score; 77 | } 78 | 79 | private double scoreGram(CharSequence gram) { 80 | AbstractNode cur = root; 81 | for (int i=0; ic) return null; 104 | } 105 | return null; 106 | } 107 | 108 | } 109 | } 110 | -------------------------------------------------------------------------------- /jlangdetect/src/main/java/me/champeau/ld/GramTreeBuilder.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Licensed to the Apache Software Foundation (ASF) under one or more 3 | * contributor license agreements. See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | * 17 | * 18 | */ 19 | 20 | package me.champeau.ld; 21 | 22 | import me.champeau.ld.learn.util.LearningException; 23 | 24 | import java.util.*; 25 | 26 | /** 27 | * A gram tree is used to learn n-grams from texts, and is able to score a text. The n-gram data is represented as a 28 | * lexical tree. The representation is rather compact, but one could do better with annotated-DFAs. 29 | *

30 | * Not thread-safe. 31 | * 32 | */ 33 | public class GramTreeBuilder extends AbstractGramTree { 34 | 35 | private static final long serialVersionUID = 4421643808498040212L; 36 | private boolean built = false; 37 | private double truncationThreshold = 1.0; 38 | 39 | /** 40 | * Builds an n-gram tree 41 | * 42 | * @param min minimal n-gram size 43 | * @param max maximum n-gram size 44 | */ 45 | public GramTreeBuilder(int min, int max) { 46 | super(min, max); 47 | root = new NodeBuilder('\u0000'); 48 | } 49 | 50 | public void setTruncationThreshold(final double truncationThreshold) { 51 | if (truncationThreshold<0 || truncationThreshold>1.0d) { 52 | throw new IllegalArgumentException("Truncation threshold must be comprised between 0.0 and 1.0"); 53 | } 54 | this.truncationThreshold = truncationThreshold; 55 | } 56 | 57 | /** 58 | * Adds n-grams statistics to the n-gram tree. 59 | * 60 | * @param text character sequence to learn n-grams from. 61 | */ 62 | public void learn(CharSequence text) { 63 | if (built) throw new IllegalStateException("N-Gram tree has already been built"); 64 | NGramTokenizer tokenizer = new NGramTokenizer(text, min, max); 65 | for (CharSequence token : tokenizer) { 66 | addGram(token); 67 | } 68 | } 69 | 70 | /** 71 | * Adds a single n-gram to the n-gram tree. 72 | * 73 | * @param gram n-gram to be added to the tree. 74 | */ 75 | private void addGram(CharSequence gram) { 76 | if (built) throw new IllegalStateException("N-Gram tree has already been built"); 77 | NodeBuilder cur = (NodeBuilder) root; 78 | for (int i = 0; i < gram.length(); i++) { 79 | char c = gram.charAt(i); 80 | NodeBuilder next = (NodeBuilder) cur.getChild(c); 81 | if (next == null) next = cur.addTransition(c); 82 | cur = next; 83 | if (i == gram.length() - 1) cur.inc(); 84 | } 85 | gramcount++; 86 | } 87 | 88 | /** 89 | * Optimizes the n-gram tree memory consumption. 90 | * 91 | * @return an immutable gram tree 92 | */ 93 | public AbstractGramTree build() { 94 | built = true; 95 | final NodeBuilder nodeBuilder = (NodeBuilder) root; 96 | ArrayList freqs = new ArrayList(); 97 | nodeBuilder.collectFreqs(freqs); 98 | Collections.sort(freqs); 99 | root = nodeBuilder.build(freqs.get((int) (freqs.size()*(1.0-truncationThreshold)))); 100 | return new GramTreeImpl(root, min, max, gramcount); 101 | } 102 | 103 | 104 | /** 105 | * A node of the n-gram tree. Consists of a character, its frequency, and the list of followers. 106 | */ 107 | private static class NodeBuilder extends AbstractNode implements Comparable { 108 | private final static int DEFAULT_ALLOC = 64; 109 | 110 | int childcount; 111 | 112 | private NodeBuilder(char c) { 113 | this.c = c; 114 | this.freq = 0; 115 | this.childcount = 0; 116 | } 117 | 118 | public AbstractNode getChild(char c) { 119 | if (children == null) return null; 120 | for (int i = 0; i < childcount; i++) { 121 | if (children[i].c == c) return children[i]; 122 | if (children[i].c > c) return null; 123 | } 124 | return null; 125 | } 126 | 127 | public NodeBuilder addTransition(char c) { 128 | NodeBuilder child = new NodeBuilder(c); 129 | if (children == null) { 130 | children = new NodeBuilder[DEFAULT_ALLOC]; 131 | } 132 | if (childcount == children.length - 1) { 133 | // reallocate 134 | NodeBuilder[] realloc = new NodeBuilder[children.length + DEFAULT_ALLOC]; 135 | System.arraycopy(children, 0, realloc, 0, children.length); 136 | children = realloc; 137 | } 138 | children[childcount] = child; 139 | childcount++; 140 | Arrays.sort(children, 0, childcount); 141 | return child; 142 | } 143 | 144 | private void inc() { 145 | if (freq==Integer.MAX_VALUE) { 146 | throw new LearningException("Maximum frequency is reached. N-Gram is too frequent in the corpus. Try to use a smaller corpus."); 147 | } 148 | freq++; 149 | } 150 | 151 | public int compareTo(NodeBuilder o) { 152 | return c - o.c; 153 | } 154 | 155 | /** 156 | * Builds an immutable n-gram tree from this builder data. The minimal frequency value is used to discard 157 | * n-grams which are supposed to be irrelevant for a language, reducing the total amount of memory required 158 | * to model a language. 159 | * @param minFreq the minimum number of occurrences an n-gram must have been seen to be considered relevant 160 | * @return an immutable n-gram tree 161 | */ 162 | private AbstractNode build(final int minFreq) { 163 | if (childcount == 0) return new MinimalNode(c, freq, null); 164 | List children2 = new LinkedList(); 165 | for (int i = 0; i < childcount; i++) { 166 | if (children[i].freq>=minFreq) children2.add(((NodeBuilder) children[i]).build(minFreq)); 167 | } 168 | return new MinimalNode(c, freq, children2.isEmpty()?null:children2.toArray(new AbstractNode[children2.size()])); 169 | } 170 | 171 | public void collectFreqs(ArrayList freqs) { 172 | freqs.add(freq); 173 | for (int i=0; i 33 | * Such an algorithm requires that the corpus used for training look as identical as possible. Parallel corpus are good 34 | * candidates. 35 | * 36 | */ 37 | public class LangDetector { 38 | private final static Logger theLogger = LoggerFactory.getLogger(LangDetector.class); 39 | 40 | private Map statsMap = new HashMap(); 41 | 42 | public LangDetector() { 43 | } 44 | 45 | /** 46 | * Creates a language detector using the same language profiles as the provided detector. 47 | * @param other the detector from which copy resources from. 48 | */ 49 | protected LangDetector(LangDetector other) { 50 | for (Map.Entry entry : other.statsMap.entrySet()) { 51 | statsMap.put(entry.getKey(), entry.getValue()); 52 | } 53 | } 54 | 55 | public void register(String lang, ObjectInputStream in) { 56 | try { 57 | statsMap.put(lang, (AbstractGramTree) in.readObject()); 58 | in.close(); 59 | } catch (IOException e) { 60 | e.printStackTrace(); 61 | } catch (ClassNotFoundException e) { 62 | e.printStackTrace(); 63 | } 64 | } 65 | 66 | public void register(String lang, AbstractGramTree tree) { 67 | statsMap.put(lang, tree); 68 | } 69 | 70 | /** 71 | * Performs a language detection, using the whole set of possible languages. 72 | * 73 | * @param aText the text for which to detect the language 74 | * @return the detected language 75 | */ 76 | public String detectLang(CharSequence aText) { 77 | return detectLang(aText, statsMap.keySet()); 78 | } 79 | 80 | /** 81 | * Performs a language detection, but limits the detection to the set of provided languages. This is useful when the 82 | * detector has been trained with many languages, but you wish to discriminate between a smaller set of possible 83 | * languages (or, you know that the document is either in english or french). 84 | * 85 | * 86 | * @param aText the text for which to detect the language 87 | * @param languageRestrictions the set of languages the detector should be limited to 88 | * @return the detected language or null if all scores are 0 89 | */ 90 | public String detectLang(CharSequence aText, Set languageRestrictions) { 91 | double best = 0; 92 | String bestLang = null; 93 | for (Map.Entry entry : statsMap.entrySet()) { 94 | final String currentLanguage = entry.getKey(); 95 | if (languageRestrictions.contains(currentLanguage)) { 96 | if (theLogger.isDebugEnabled()) { 97 | theLogger.debug("---------- testing : " + currentLanguage + " -------------"); 98 | } 99 | double score = entry.getValue().scoreText(aText); 100 | if (theLogger.isDebugEnabled()) { 101 | theLogger.debug("---------- result : " + currentLanguage + " : " + score + " -------------"); 102 | } 103 | if (score > best) { 104 | best = score; 105 | bestLang = currentLanguage; 106 | } 107 | } 108 | } 109 | return bestLang; 110 | } 111 | 112 | /** 113 | * Returns the scores of each language profile for the given input text. The language detection is limited 114 | * to the languages specified by the languageRestrictions parameter, and the resulting list is sorted by 115 | * descending score. 116 | * @param aText the text for which to detect score 117 | * @param languageRestrictions the list of languages to be tested 118 | * @return the scores for each language, sorted by descending score 119 | */ 120 | public Collection scoreLanguages(CharSequence aText, Set languageRestrictions) { 121 | List scores = new LinkedList(); 122 | for (Map.Entry entry : statsMap.entrySet()) { 123 | final String currentLanguage = entry.getKey(); 124 | if (languageRestrictions.contains(currentLanguage)) { 125 | scores.add(new Score(currentLanguage,entry.getValue().scoreText(aText))); 126 | } 127 | } 128 | Collections.sort(scores); 129 | return scores; 130 | } 131 | 132 | /** 133 | * Returns the scores of each language profile for the given input text. The resulting list is sorted by 134 | * descending score. 135 | * @param aText the text for which to detect score 136 | * @return the scores for each language, sorted by descending score 137 | */ 138 | public Collection scoreLanguages(CharSequence aText) { 139 | return scoreLanguages(aText, statsMap.keySet()); 140 | } 141 | 142 | public static class Score implements Comparable { 143 | private final String language; 144 | private final double score; 145 | 146 | public Score(final String language, final double score) { 147 | this.language = language; 148 | this.score = score; 149 | } 150 | 151 | public int compareTo(final Score o) { 152 | return Double.compare(o.score, score); 153 | } 154 | 155 | public String getLanguage() { 156 | return language; 157 | } 158 | 159 | public double getScore() { 160 | return score; 161 | } 162 | 163 | @Override 164 | public String toString() { 165 | final StringBuilder sb = new StringBuilder(); 166 | sb.append("Score"); 167 | sb.append("{language='").append(language).append('\''); 168 | sb.append(", score=").append(score); 169 | sb.append('}'); 170 | return sb.toString(); 171 | } 172 | } 173 | } 174 | 175 | -------------------------------------------------------------------------------- /jlangdetect/src/main/java/me/champeau/ld/NGramIterator.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Licensed to the Apache Software Foundation (ASF) under one or more 3 | * contributor license agreements. See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | * 17 | * 18 | */ 19 | 20 | package me.champeau.ld; 21 | 22 | import java.util.Iterator; 23 | 24 | /** 25 | * Iterates over a char sequence to produce n-grams. Requires both minimal and maximal gram length. 26 | */ 27 | public class NGramIterator implements Iterator { 28 | private final CharSequence buffer; 29 | private final int max; 30 | 31 | private int pos; 32 | private int window; 33 | 34 | public NGramIterator(CharSequence buffer, int min, int max) { 35 | this.buffer = buffer; 36 | this.max = max; 37 | pos = -1; 38 | window = min; 39 | } 40 | 41 | public boolean hasNext() { 42 | boolean ok = pos+windowbuffer.length()) { 52 | pos = 0; 53 | window++; 54 | } 55 | if ((window>max)||(pos+window>buffer.length())) return null; 56 | return buffer.subSequence(pos, pos+window); 57 | } 58 | 59 | public void remove() { 60 | throw new UnsupportedOperationException(); 61 | } 62 | 63 | } 64 | -------------------------------------------------------------------------------- /jlangdetect/src/main/java/me/champeau/ld/NGramTokenizer.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Licensed to the Apache Software Foundation (ASF) under one or more 3 | * contributor license agreements. See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | * 17 | * 18 | */ 19 | 20 | package me.champeau.ld; 21 | 22 | import java.util.Iterator; 23 | 24 | /** 25 | * Tokenizes char sequences. Wrapper for an @link NGramIterator. 26 | */ 27 | public class NGramTokenizer implements Iterable { 28 | final private CharSequence buffer; 29 | final private int min,max; 30 | 31 | public NGramTokenizer(CharSequence buffer, int min, int max) { 32 | this.buffer = buffer; 33 | this.min = min; 34 | this.max = max; 35 | } 36 | 37 | public Iterator iterator() { 38 | return new NGramIterator(buffer, min, max); 39 | } 40 | } 41 | -------------------------------------------------------------------------------- /jlangdetect/src/main/java/me/champeau/ld/learn/util/DirectoryLearning.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Licensed to the Apache Software Foundation (ASF) under one or more 3 | * contributor license agreements. See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | */ 17 | 18 | package me.champeau.ld.learn.util; 19 | 20 | import me.champeau.ld.AbstractGramTree; 21 | import me.champeau.ld.GramTreeBuilder; 22 | import me.champeau.ld.LangDetector; 23 | import org.slf4j.Logger; 24 | import org.slf4j.LoggerFactory; 25 | 26 | import java.io.*; 27 | import java.util.LinkedList; 28 | import java.util.List; 29 | import java.util.Map; 30 | import java.util.concurrent.*; 31 | 32 | /** 33 | * A simple learning tool which takes a directory as input, and another directory as output. The input directory 34 | * must consist of subdirectories which name correspond to a language to learn. Each language directory is supposed 35 | * to contain a list of plain text files encoded in UTF-8. 36 | * 37 | * The resulting output directory will 38 | * consist of files named : [lang]_tree.bin 39 | * 40 | * Training takes less than 1 minute/language on my computer, with a quad core processor. The loader has been optimized 41 | * for multi-core systems. 42 | * 43 | */ 44 | public class DirectoryLearning { 45 | private final static Logger theLogger = LoggerFactory.getLogger(DirectoryLearning.class); 46 | 47 | /** 48 | * Reads a single EPPPC file, strips XML lines and returns a single string containing raw text. 49 | * @param aFile a EPPPC text file, encoded in UTF-8. 50 | * @return raw text 51 | */ 52 | private static String readSingleFile(File aFile) { 53 | StringBuilder sb = new StringBuilder(); 54 | try { 55 | BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(aFile), "UTF-8")); 56 | String line; 57 | while ((line = reader.readLine()) != null) { 58 | sb.append(line).append('\n'); 59 | } 60 | reader.close(); 61 | } catch (IOException e) { 62 | theLogger.error("Unable to read file : " + aFile); 63 | return null; 64 | } 65 | return sb.toString(); 66 | } 67 | 68 | /** 69 | * Returns a map (lang code -> gram tree) of gram trees 70 | * @param srcDir source directory where to find language specific directories 71 | * @param dstDir output directory for compiled n-grams trees 72 | * @param langs list of languages to be compiled 73 | * @return the map of trees 74 | */ 75 | private static Map readCorpus(final File srcDir, final File dstDir, String[] langs) { 76 | int threads = Runtime.getRuntime().availableProcessors(); 77 | ExecutorService service = Executors.newFixedThreadPool(threads); 78 | theLogger.info("Parallel processing of "+threads+" languages over "+langs.length+"..."); 79 | List> tasks = new LinkedList>(); 80 | final Map trees = new ConcurrentHashMap(); 81 | for (final String lang : langs) { 82 | tasks.add(service.submit(new Runnable() { 83 | public void run() { 84 | theLogger.info("Processing directory " + lang); 85 | GramTreeBuilder tree = new GramTreeBuilder(1, 3); 86 | tree.setTruncationThreshold(0.1d); 87 | if (lang.equals("ru")) { 88 | tree.setTruncationThreshold(0.2d); 89 | } 90 | File sourceFiles = new File(srcDir, lang); 91 | File[] files = sourceFiles.listFiles(); 92 | int cpt = 0; 93 | for (File file : files) { 94 | final String text = readSingleFile(file); 95 | final String[] lines = text.split("\n"); 96 | for (String line : lines) { 97 | tree.learn(line); 98 | } 99 | cpt++; 100 | if (cpt % 20 == 0) { 101 | theLogger.info("Processed " + (100 * cpt / files.length) + "% of " + lang); 102 | } 103 | } 104 | final AbstractGramTree build = tree.build(); 105 | trees.put(lang, build); 106 | theLogger.info("Saving tree : "+lang); 107 | File dst = new File(dstDir, lang+"_tree.bin"); 108 | try { 109 | ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(dst))); 110 | out.writeObject(build); 111 | out.close(); 112 | } catch (IOException e) { 113 | theLogger.error("Unable to write lang tree "+lang,e); 114 | } 115 | theLogger.info("Lang "+ lang+" complete !"); 116 | } 117 | })); 118 | } 119 | // passive wait 120 | for (Future task : tasks) { 121 | try { 122 | task.get(); 123 | } catch (InterruptedException e) { 124 | e.printStackTrace(); 125 | } catch (ExecutionException e) { 126 | e.printStackTrace(); 127 | } 128 | } 129 | service.shutdown(); 130 | return trees; 131 | } 132 | 133 | public static void main(String[] args) { 134 | if (args.length != 2) { 135 | System.out.println("Usage : java " + DirectoryLearning.class.getCanonicalName() + " "); 136 | System.exit(-1); 137 | } 138 | File srcDir = new File(args[0]); 139 | File dstDir = new File(args[1]); 140 | dstDir.mkdirs(); 141 | final String[] langs = srcDir.list(); 142 | LangDetector detector = new LangDetector(); 143 | Map trees = readCorpus(srcDir, dstDir, langs); 144 | for (Map.Entry entry : trees.entrySet()) { 145 | detector.register(entry.getKey(), entry.getValue()); 146 | } 147 | } 148 | 149 | } 150 | -------------------------------------------------------------------------------- /jlangdetect/src/main/java/me/champeau/ld/learn/util/LearningException.java: -------------------------------------------------------------------------------- 1 | package me.champeau.ld.learn.util; 2 | 3 | /** 4 | * This exception is thrown whenever an error is encountered during corpus learning. 5 | */ 6 | public class LearningException extends RuntimeException { 7 | public LearningException() { 8 | super(); 9 | } 10 | 11 | public LearningException(final Throwable cause) { 12 | super(cause); 13 | } 14 | 15 | public LearningException(final String message) { 16 | super(message); 17 | } 18 | 19 | public LearningException(final String message, final Throwable cause) { 20 | super(message, cause); 21 | } 22 | 23 | protected LearningException(final String message, final Throwable cause, final boolean enableSuppression, final boolean writableStackTrace) { 24 | super(message, cause, enableSuppression, writableStackTrace); 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /settings.gradle.kts: -------------------------------------------------------------------------------- 1 | rootProject.name = "jlangdetect-parent" 2 | 3 | enableFeaturePreview("VERSION_CATALOGS") 4 | 5 | include(":jlangdetect-europarl") 6 | include(":jlangdetect") 7 | include(":jlangdetect-extra") 8 | 9 | dependencyResolutionManagement { 10 | repositories { 11 | mavenCentral() 12 | } 13 | } --------------------------------------------------------------------------------