age(int age) {
205 | //apply all validations here
206 | return between(0, 99).
207 | validate(age).
208 | mapFailures(FieldFail.fromFail("age")).
209 | map(Age::new);
210 | }
211 |
212 | }
213 |
214 | ```
215 |
216 | then we can invoke our service using:
217 |
218 | ```
219 |
220 | Service service = new Service();
221 |
222 | Validation result = Validation.apply(
223 | service::doSomething, Service.name("carlos"), Service.age(38));
224 |
225 | ```
226 |
227 | if we have unit tests in the package we can test the logic bypassing the validation step.
228 |
--------------------------------------------------------------------------------
/bnd.bnd:
--------------------------------------------------------------------------------
1 | Bundle-SymbolicName: com.liferay.functional.validation
2 | Bundle-Version: 0.0.1.SNAPSHOT
3 | Export-Package: com.liferay.functional.*
--------------------------------------------------------------------------------
/build.gradle:
--------------------------------------------------------------------------------
1 | group 'com.liferay.functional'
2 | version '0.0.1.SNAPSHOT'
3 |
4 | apply plugin: 'biz.aQute.bnd.builder'
5 | apply plugin: 'java'
6 | apply plugin: 'maven'
7 |
8 | sourceCompatibility = 1.8
9 | targetCompatibility = 1.8
10 |
11 | buildscript {
12 | repositories {
13 | jcenter()
14 | }
15 | dependencies {
16 | classpath 'biz.aQute.bnd:biz.aQute.bnd.gradle:3.2.0'
17 | }
18 | }
19 |
20 | repositories {
21 | mavenLocal()
22 | mavenCentral()
23 | }
24 |
25 | dependencies {
26 | testCompile group: 'junit', name: 'junit', version: '4.11'
27 | }
28 |
--------------------------------------------------------------------------------
/gradle/wrapper/gradle-wrapper.jar:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/csierra/java-functional-applicative-validation/d525408066177d5132b1c3b655696ab3c350f09d/gradle/wrapper/gradle-wrapper.jar
--------------------------------------------------------------------------------
/gradle/wrapper/gradle-wrapper.properties:
--------------------------------------------------------------------------------
1 | #Mon Oct 10 22:23:26 CEST 2016
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | zipStoreBase=GRADLE_USER_HOME
5 | zipStorePath=wrapper/dists
6 | distributionUrl=https\://services.gradle.org/distributions/gradle-2.5-all.zip
7 |
--------------------------------------------------------------------------------
/gradlew:
--------------------------------------------------------------------------------
1 | #!/usr/bin/env bash
2 |
3 | ##############################################################################
4 | ##
5 | ## Gradle start up script for UN*X
6 | ##
7 | ##############################################################################
8 |
9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
10 | DEFAULT_JVM_OPTS=""
11 |
12 | APP_NAME="Gradle"
13 | APP_BASE_NAME=`basename "$0"`
14 |
15 | # Use the maximum available, or set MAX_FD != -1 to use that value.
16 | MAX_FD="maximum"
17 |
18 | warn ( ) {
19 | echo "$*"
20 | }
21 |
22 | die ( ) {
23 | echo
24 | echo "$*"
25 | echo
26 | exit 1
27 | }
28 |
29 | # OS specific support (must be 'true' or 'false').
30 | cygwin=false
31 | msys=false
32 | darwin=false
33 | case "`uname`" in
34 | CYGWIN* )
35 | cygwin=true
36 | ;;
37 | Darwin* )
38 | darwin=true
39 | ;;
40 | MINGW* )
41 | msys=true
42 | ;;
43 | esac
44 |
45 | # For Cygwin, ensure paths are in UNIX format before anything is touched.
46 | if $cygwin ; then
47 | [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
48 | fi
49 |
50 | # Attempt to set APP_HOME
51 | # Resolve links: $0 may be a link
52 | PRG="$0"
53 | # Need this for relative symlinks.
54 | while [ -h "$PRG" ] ; do
55 | ls=`ls -ld "$PRG"`
56 | link=`expr "$ls" : '.*-> \(.*\)$'`
57 | if expr "$link" : '/.*' > /dev/null; then
58 | PRG="$link"
59 | else
60 | PRG=`dirname "$PRG"`"/$link"
61 | fi
62 | done
63 | SAVED="`pwd`"
64 | cd "`dirname \"$PRG\"`/" >&-
65 | APP_HOME="`pwd -P`"
66 | cd "$SAVED" >&-
67 |
68 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
69 |
70 | # Determine the Java command to use to start the JVM.
71 | if [ -n "$JAVA_HOME" ] ; then
72 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
73 | # IBM's JDK on AIX uses strange locations for the executables
74 | JAVACMD="$JAVA_HOME/jre/sh/java"
75 | else
76 | JAVACMD="$JAVA_HOME/bin/java"
77 | fi
78 | if [ ! -x "$JAVACMD" ] ; then
79 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
80 |
81 | Please set the JAVA_HOME variable in your environment to match the
82 | location of your Java installation."
83 | fi
84 | else
85 | JAVACMD="java"
86 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
87 |
88 | Please set the JAVA_HOME variable in your environment to match the
89 | location of your Java installation."
90 | fi
91 |
92 | # Increase the maximum file descriptors if we can.
93 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
94 | MAX_FD_LIMIT=`ulimit -H -n`
95 | if [ $? -eq 0 ] ; then
96 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
97 | MAX_FD="$MAX_FD_LIMIT"
98 | fi
99 | ulimit -n $MAX_FD
100 | if [ $? -ne 0 ] ; then
101 | warn "Could not set maximum file descriptor limit: $MAX_FD"
102 | fi
103 | else
104 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
105 | fi
106 | fi
107 |
108 | # For Darwin, add options to specify how the application appears in the dock
109 | if $darwin; then
110 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
111 | fi
112 |
113 | # For Cygwin, switch paths to Windows format before running java
114 | if $cygwin ; then
115 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
116 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
117 |
118 | # We build the pattern for arguments to be converted via cygpath
119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
120 | SEP=""
121 | for dir in $ROOTDIRSRAW ; do
122 | ROOTDIRS="$ROOTDIRS$SEP$dir"
123 | SEP="|"
124 | done
125 | OURCYGPATTERN="(^($ROOTDIRS))"
126 | # Add a user-defined pattern to the cygpath arguments
127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
129 | fi
130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
131 | i=0
132 | for arg in "$@" ; do
133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
135 |
136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
138 | else
139 | eval `echo args$i`="\"$arg\""
140 | fi
141 | i=$((i+1))
142 | done
143 | case $i in
144 | (0) set -- ;;
145 | (1) set -- "$args0" ;;
146 | (2) set -- "$args0" "$args1" ;;
147 | (3) set -- "$args0" "$args1" "$args2" ;;
148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
154 | esac
155 | fi
156 |
157 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
158 | function splitJvmOpts() {
159 | JVM_OPTS=("$@")
160 | }
161 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
162 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
163 |
164 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
165 |
--------------------------------------------------------------------------------
/gradlew.bat:
--------------------------------------------------------------------------------
1 | @if "%DEBUG%" == "" @echo off
2 | @rem ##########################################################################
3 | @rem
4 | @rem Gradle startup script for Windows
5 | @rem
6 | @rem ##########################################################################
7 |
8 | @rem Set local scope for the variables with windows NT shell
9 | if "%OS%"=="Windows_NT" setlocal
10 |
11 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
12 | set DEFAULT_JVM_OPTS=
13 |
14 | set DIRNAME=%~dp0
15 | if "%DIRNAME%" == "" set DIRNAME=.
16 | set APP_BASE_NAME=%~n0
17 | set APP_HOME=%DIRNAME%
18 |
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 |
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 |
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 |
32 | goto fail
33 |
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 |
38 | if exist "%JAVA_EXE%" goto init
39 |
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 |
46 | goto fail
47 |
48 | :init
49 | @rem Get command-line arguments, handling Windowz variants
50 |
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 | if "%@eval[2+2]" == "4" goto 4NT_args
53 |
54 | :win9xME_args
55 | @rem Slurp the command line arguments.
56 | set CMD_LINE_ARGS=
57 | set _SKIP=2
58 |
59 | :win9xME_args_slurp
60 | if "x%~1" == "x" goto execute
61 |
62 | set CMD_LINE_ARGS=%*
63 | goto execute
64 |
65 | :4NT_args
66 | @rem Get arguments from the 4NT Shell from JP Software
67 | set CMD_LINE_ARGS=%$
68 |
69 | :execute
70 | @rem Setup the command line
71 |
72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
73 |
74 | @rem Execute Gradle
75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
76 |
77 | :end
78 | @rem End local scope for the variables with windows NT shell
79 | if "%ERRORLEVEL%"=="0" goto mainEnd
80 |
81 | :fail
82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
83 | rem the _cmd.exe /c_ return code!
84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
85 | exit /b 1
86 |
87 | :mainEnd
88 | if "%OS%"=="Windows_NT" endlocal
89 |
90 | :omega
91 |
--------------------------------------------------------------------------------
/settings.gradle:
--------------------------------------------------------------------------------
1 | rootProject.name = 'java8-functional'
2 |
3 |
--------------------------------------------------------------------------------
/src/main/java/com/liferay/functional/Applicative.java:
--------------------------------------------------------------------------------
1 | /**
2 | * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
3 | *
4 | * This library is free software; you can redistribute it and/or modify it under
5 | * the terms of the GNU Lesser General Public License as published by the Free
6 | * Software Foundation; either version 2.1 of the License, or (at your option)
7 | * any later version.
8 | *
9 | * This library is distributed in the hope that it will be useful, but WITHOUT
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11 | * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12 | * details.
13 | */
14 |
15 | package com.liferay.functional;
16 |
17 | import java.util.function.Function;
18 |
19 | /**
20 | * @author Carlos Sierra Andrés
21 | */
22 | public interface Applicative {
23 |
24 | Applicative apply(Applicative ap);
25 |
26 | Applicative flatApply(Applicative ap);
27 |
28 | Applicative map(Function fun);
29 |
30 | public static , A, B, RESULT> Applicative combine(Function2 fun, Applicative a, Applicative b) {
31 | return a.map(fun.curried()).apply(b);
32 | }
33 |
34 | public static , A, B, C, RESULT> Applicative combine(Function3 fun, Applicative a, Applicative b, Applicative c) {
35 | return a.map(fun.curried()).apply(b).apply(c);
36 | }
37 |
38 | public static , A, B, C, D, RESULT> Applicative combine(Function4 fun, Applicative a, Applicative b, Applicative c, Applicative d) {
39 | return a.map(fun.curried()).apply(b).apply(c).apply(d);
40 | }
41 |
42 | public static , A, B, C, D, E, RESULT> Applicative combine(Function5 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e) {
43 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e);
44 | }
45 |
46 | public static , A, B, C, D, E, F, RESULT> Applicative combine(Function6 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f) {
47 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f);
48 | }
49 |
50 | public static , A, B, C, D, E, F, G, RESULT> Applicative combine(Function7 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g) {
51 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g);
52 | }
53 |
54 | public static , A, B, C, D, E, F, G, H, RESULT> Applicative combine(Function8 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h) {
55 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h);
56 | }
57 |
58 | public static , A, B, C, D, E, F, G, H, I, RESULT> Applicative combine(Function9 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative i) {
59 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h).apply(i);
60 | }
61 |
62 | public static , A, B, C, D, E, F, G, H, I, J, RESULT> Applicative combine(Function10 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative i, Applicative j) {
63 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h).apply(i).apply(j);
64 | }
65 |
66 | public static , A, B, C, D, E, F, G, H, I, J, K, RESULT> Applicative combine(Function11 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative i, Applicative j, Applicative k) {
67 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h).apply(i).apply(j).apply(k);
68 | }
69 |
70 | public static , A, B, C, D, E, F, G, H, I, J, K, L, RESULT> Applicative combine(Function12 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative i, Applicative j, Applicative k, Applicative l) {
71 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h).apply(i).apply(j).apply(k).apply(l);
72 | }
73 |
74 | public static , A, B, C, D, E, F, G, H, I, J, K, L, M, RESULT> Applicative combine(Function13 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative i, Applicative j, Applicative k, Applicative l, Applicative m) {
75 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h).apply(i).apply(j).apply(k).apply(l).apply(m);
76 | }
77 |
78 | public static , A, B, C, D, E, F, G, H, I, J, K, L, M, N, RESULT> Applicative combine(Function14 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative i, Applicative j, Applicative k, Applicative l, Applicative m, Applicative n) {
79 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h).apply(i).apply(j).apply(k).apply(l).apply(m).apply(n);
80 | }
81 |
82 | public static , A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, RESULT> Applicative combine(Function15 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative i, Applicative j, Applicative k, Applicative l, Applicative m, Applicative n, Applicative o) {
83 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h).apply(i).apply(j).apply(k).apply(l).apply(m).apply(n).apply(o);
84 | }
85 |
86 | public static , A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, RESULT> Applicative combine(Function16 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative i, Applicative j, Applicative k, Applicative l, Applicative m, Applicative n, Applicative o, Applicative p) {
87 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h).apply(i).apply(j).apply(k).apply(l).apply(m).apply(n).apply(o).apply(p);
88 | }
89 |
90 | public static , A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, RESULT> Applicative combine(Function17 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative i, Applicative j, Applicative k, Applicative l, Applicative m, Applicative n, Applicative o, Applicative p, Applicative q) {
91 | return a.map(fun.curried()).apply(b).apply(c).apply(d).apply(e).apply(f).apply(g).apply(h).apply(i).apply(j).apply(k).apply(l).apply(m).apply(n).apply(o).apply(p).apply(q);
92 | }
93 |
94 | public static , A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, RESULT> Applicative combine(Function18 fun, Applicative a, Applicative b, Applicative c, Applicative d, Applicative e, Applicative f, Applicative g, Applicative h, Applicative