├── .gitignore
├── LICENSE
├── README.md
├── pom.xml
└── src
├── main
├── java
│ └── com
│ │ └── iteratrlearning
│ │ └── shu_book
│ │ ├── chapter_02
│ │ ├── BankStatementAnalyzer.java
│ │ ├── BankStatementAnalyzerProblematic.java
│ │ ├── BankStatementAnalyzerSRP.java
│ │ ├── BankStatementAnalyzerSimple.java
│ │ ├── BankStatementCSVParser.java
│ │ ├── BankStatementDAO.java
│ │ ├── BankStatementFullParser.java
│ │ ├── BankStatementParser.java
│ │ ├── BankStatementProcessor.java
│ │ ├── BankTransaction.java
│ │ └── MainApplication.java
│ │ ├── chapter_03
│ │ ├── BankStatementAnalyzer.java
│ │ ├── BankStatementCSVParser.java
│ │ ├── BankStatementParser.java
│ │ ├── BankStatementProcessor.java
│ │ ├── BankTransaction.java
│ │ ├── BankTransactionFilter.java
│ │ ├── BankTransactionSummarizer.java
│ │ ├── Exporter.java
│ │ ├── HtmlExporter.java
│ │ ├── MainApplication.java
│ │ └── SummaryStatistics.java
│ │ ├── chapter_04
│ │ ├── Attributes.java
│ │ ├── Document.java
│ │ ├── DocumentManagementSystem.java
│ │ ├── ImageImporter.java
│ │ ├── Importer.java
│ │ ├── InvoiceImporter.java
│ │ ├── LetterImporter.java
│ │ ├── Query.java
│ │ ├── ReportImporter.java
│ │ ├── TextFile.java
│ │ └── UnknownFileTypeException.java
│ │ ├── chapter_05
│ │ ├── Action.java
│ │ ├── BusinessRuleEngine.java
│ │ ├── Condition.java
│ │ ├── ConditionalAction.java
│ │ ├── Diagnosis.java
│ │ ├── Facts.java
│ │ ├── Inspector.java
│ │ ├── Main.java
│ │ ├── Rule.java
│ │ ├── RuleBuilder.java
│ │ ├── Stage.java
│ │ └── SwitchExpressions.java
│ │ └── chapter_06
│ │ ├── DeleteStatus.java
│ │ ├── FollowStatus.java
│ │ ├── KeyGenerator.java
│ │ ├── Position.java
│ │ ├── ReceiverEndPoint.java
│ │ ├── RegistrationStatus.java
│ │ ├── SenderEndPoint.java
│ │ ├── Twoot.java
│ │ ├── TwootQuery.java
│ │ ├── TwootRepository.java
│ │ ├── Twootr.java
│ │ ├── User.java
│ │ ├── UserRepository.java
│ │ ├── database
│ │ ├── DatabaseConnection.java
│ │ ├── DatabaseTwootRepository.java
│ │ ├── DatabaseUserRepository.java
│ │ ├── Extractor.java
│ │ ├── StatementRunner.java
│ │ └── With.java
│ │ ├── examples
│ │ ├── Point.java
│ │ ├── PrintingEndPoint.java
│ │ ├── PrintingEndPointSnippets.java
│ │ └── Reduce.java
│ │ ├── in_memory
│ │ ├── InMemoryTwootRepository.java
│ │ └── InMemoryUserRepository.java
│ │ └── web_adapter
│ │ ├── TwootrServer.java
│ │ └── WebSocketEndPoint.java
├── resources
│ └── bank-data-simple.csv
└── webapp
│ ├── css
│ ├── bootstrap-theme.css
│ ├── bootstrap-theme.css.map
│ ├── bootstrap-theme.min.css
│ ├── bootstrap-theme.min.css.map
│ ├── bootstrap.css
│ ├── bootstrap.css.map
│ ├── bootstrap.min.css
│ └── bootstrap.min.css.map
│ ├── fonts
│ ├── glyphicons-halflings-regular.eot
│ ├── glyphicons-halflings-regular.svg
│ ├── glyphicons-halflings-regular.ttf
│ ├── glyphicons-halflings-regular.woff
│ └── glyphicons-halflings-regular.woff2
│ ├── index.html
│ └── js
│ ├── app.js
│ ├── bootstrap.js
│ ├── bootstrap.min.js
│ └── npm.js
└── test
├── java
└── com
│ └── iteratrlearning
│ └── shu_book
│ ├── chapter_02
│ └── BankTransactionCSVParserTest.java
│ ├── chapter_03
│ └── BankStatementProcessorTest.java
│ ├── chapter_04
│ └── DocumentManagementSystemTest.java
│ ├── chapter_05
│ └── InspectorTest.java
│ └── chapter_06
│ ├── AbstractTwootRepositoryTest.java
│ ├── AbstractUserRepositoryTest.java
│ ├── DatabaseTwootRepositoryTest.java
│ ├── DatabaseUserRepositoryTest.java
│ ├── InMemoryTwootRepositoryTest.java
│ ├── InMemoryUserRepositoryTest.java
│ ├── MockReceiverEndPoint.java
│ ├── TestData.java
│ └── TwootrTest.java
└── resources
├── bank-data-simple.csv
├── patient.invoice
├── patient.letter
├── patient.report
├── unknown.txt
└── xray.jpg
/.gitignore:
--------------------------------------------------------------------------------
1 | *.idea
2 | *.iml
3 | target/
4 | db
5 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | This is the sample code for the book "Real World Software Development"
2 | written by Richard Warburton and Raoul-Gabriel Urma and published by
3 | O'Reilly Media.
4 |
5 | Full details can be found online at http://shop.oreilly.com/product/0636920053996.do
6 |
7 |
--------------------------------------------------------------------------------
/pom.xml:
--------------------------------------------------------------------------------
1 |
2 |
5 | 4.0.0
6 |
7 | com.iteratrlearning
8 | shu_book
9 | 1.0-SNAPSHOT
10 |
11 |
12 |
13 |
14 | org.apache.maven.plugins
15 | maven-compiler-plugin
16 | 3.7.0
17 |
18 | 12
19 | 12
20 |
21 |
22 |
23 |
24 |
25 |
26 | 2.10.1
27 | 9.4.24.v20191120
28 | UTF-8
29 |
30 |
31 |
32 |
33 | junit
34 | junit
35 | 4.11
36 | test
37 |
38 |
39 | org.hamcrest
40 | hamcrest-all
41 | 1.3
42 |
43 |
44 | org.mockito
45 | mockito-core
46 | 2.21.0
47 |
48 |
49 | org.java-websocket
50 | Java-WebSocket
51 | 1.3.0
52 |
53 |
54 | com.fasterxml.jackson.core
55 | jackson-core
56 | ${jackson.version}
57 |
58 |
59 | com.fasterxml.jackson.core
60 | jackson-databind
61 | ${jackson.version}
62 |
63 |
64 | org.hsqldb
65 | hsqldb
66 | 2.3.4
67 |
68 |
69 | org.bouncycastle
70 | bcprov-jdk15on
71 | 1.58
72 |
73 |
74 |
75 |
76 | org.eclipse.jetty
77 | jetty-server
78 | ${jetty.version}
79 |
80 |
81 | org.eclipse.jetty
82 | jetty-servlet
83 | ${jetty.version}
84 |
85 |
86 |
87 |
88 |
89 | clojars.org
90 | http://clojars.org/repo
91 |
92 |
93 |
94 |
95 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankStatementAnalyzer.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | import java.io.IOException;
4 | import java.nio.file.Files;
5 | import java.nio.file.Path;
6 | import java.nio.file.Paths;
7 | import java.time.Month;
8 | import java.util.List;
9 | import java.util.stream.Collectors;
10 |
11 | public class BankStatementAnalyzer {
12 | private static final String RESOURCES = "src/main/resources/";
13 |
14 | public void analyze(final String fileName, final BankStatementParser bankStatementParser) throws IOException {
15 |
16 | final Path path = Paths.get(RESOURCES + fileName);
17 | final List lines = Files.readAllLines(path);
18 |
19 | final List bankTransactions = bankStatementParser.parseLinesFrom(lines);
20 |
21 | final BankStatementProcessor bankStatementProcessor = new BankStatementProcessor(bankTransactions);
22 |
23 | collectSummary(bankStatementProcessor);
24 |
25 | }
26 |
27 | private static void collectSummary(final BankStatementProcessor bankStatementProcessor) {
28 |
29 | System.out.println("The total for all transactions is "
30 | + bankStatementProcessor.calculateTotalAmount());
31 | System.out.println("The total for transactions in January is "
32 | + bankStatementProcessor.calculateTotalInMonth(Month.JANUARY));
33 | System.out.println("The total for transactions in February is "
34 | + bankStatementProcessor.calculateTotalInMonth(Month.FEBRUARY));
35 | System.out.println("The total salary received is "
36 | + bankStatementProcessor.calculateTotalForCategory("Salary"));
37 | }
38 | }
39 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankStatementAnalyzerProblematic.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | import java.io.IOException;
4 | import java.nio.file.Files;
5 | import java.nio.file.Path;
6 | import java.nio.file.Paths;
7 | import java.time.LocalDate;
8 | import java.time.Month;
9 | import java.time.format.DateTimeFormatter;
10 | import java.util.List;
11 |
12 | public class BankStatementAnalyzerProblematic {
13 |
14 | private static final String RESOURCES = "src/main/resources/";
15 | public static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("dd-MM-yyyy");
16 |
17 | public static void main(final String[] args) throws IOException {
18 | final Path path = Paths.get(RESOURCES + "bank-data-simple.csv");
19 | final List lines = Files.readAllLines(path);
20 | double total = 0;
21 | for (final String line : lines) {
22 | final String[] columns = line.split(",");
23 | final double amount = Double.parseDouble(columns[1]);
24 | total += amount;
25 | }
26 |
27 | System.out.println("The total for all transactions is " + total);
28 |
29 | total = 0;
30 | for (final String line : lines) {
31 |
32 | final String[] columns = line.split(",");
33 | final LocalDate date = LocalDate.parse(columns[0], DATE_FORMATTER);
34 | if (date.getMonth() == Month.JANUARY) {
35 | final double amount = Double.parseDouble(columns[1]);
36 | total += amount;
37 | }
38 |
39 | }
40 |
41 | System.out.println("The total for all transactions in January is " + total);
42 |
43 | }
44 | }
45 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankStatementAnalyzerSRP.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | import java.nio.file.Files;
4 | import java.nio.file.Path;
5 | import java.nio.file.Paths;
6 | import java.time.Month;
7 | import java.util.List;
8 | import java.util.stream.Collectors;
9 |
10 | public class BankStatementAnalyzerSRP {
11 |
12 | private static final String RESOURCES = "src/main/resources/";
13 |
14 | public static void main(final String[] args) throws Exception {
15 |
16 | final BankStatementCSVParser bankStatementParser = new BankStatementCSVParser();
17 |
18 | final Path path = Paths.get(RESOURCES + args[0]);
19 | final List lines = Files.readAllLines(path);
20 |
21 | final List bankTransactions = bankStatementParser.parseLinesFrom(lines);
22 |
23 | System.out.println("The total for all transactions is " + calculateTotalAmount(bankTransactions));
24 | System.out.println("Transactions in January " + selectInMonth(bankTransactions, Month.JANUARY));
25 | }
26 |
27 | private static double calculateTotalAmount(final List bankTransactions) {
28 | return bankTransactions.stream().mapToDouble(BankTransaction::getAmount).sum();
29 | }
30 |
31 | private static List selectInMonth(final List bankTransactions, final Month month) {
32 | return bankTransactions.stream()
33 | .filter(bankStatement -> month.equals(bankStatement.getDate().getMonth()))
34 | .collect(Collectors.toList());
35 | }
36 | }
37 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankStatementAnalyzerSimple.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | import java.io.File;
4 | import java.io.IOException;
5 | import java.nio.file.Files;
6 | import java.nio.file.Path;
7 | import java.nio.file.Paths;
8 | import java.time.LocalDate;
9 | import java.time.Month;
10 | import java.time.format.DateTimeFormatter;
11 | import java.util.Arrays;
12 | import java.util.List;
13 |
14 | public class BankStatementAnalyzerSimple {
15 |
16 | private static final String RESOURCES = "src/main/resources/";
17 |
18 | public static void main(final String[] args) throws Exception {
19 | final Path path = Paths.get(RESOURCES + "bank-data-simple.csv");
20 | final List lines = Files.readAllLines(path);
21 | double total = 0;
22 | for(final String line: lines) {
23 | String[] columns = line.split(",");
24 | double amount = Double.parseDouble(columns[1]);
25 | total += amount;
26 | }
27 |
28 | System.out.println("The total for all transactions is " + total);
29 | }
30 | }
31 |
32 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankStatementCSVParser.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | import java.time.LocalDate;
4 | import java.time.format.DateTimeFormatter;
5 | import java.util.List;
6 |
7 | import static java.util.stream.Collectors.toList;
8 |
9 | public class BankStatementCSVParser implements BankStatementParser {
10 |
11 | private static final DateTimeFormatter DATE_PATTERN = DateTimeFormatter.ofPattern("dd-MM-yyyy");
12 |
13 | public BankTransaction parseFrom(final String line) {
14 | final String[] columns = line.split(",");
15 |
16 | final LocalDate date = LocalDate.parse(columns[0], DATE_PATTERN);
17 | final double amount = Double.parseDouble(columns[1]);
18 |
19 | return new BankTransaction(date, amount, columns[2]);
20 | }
21 |
22 | public List parseLinesFrom(final List lines) {
23 | return lines.stream().map(this::parseFrom).collect(toList());
24 | }
25 | }
26 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankStatementDAO.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | import java.time.LocalDate;
4 |
5 | public class BankStatementDAO {
6 |
7 | public BankTransaction create(final LocalDate date, final double amount, final String description) {
8 | // ...
9 | throw new UnsupportedOperationException();
10 | }
11 |
12 | public BankTransaction read(final long id) {
13 | // ...
14 | throw new UnsupportedOperationException();
15 | }
16 |
17 | public BankTransaction update(final long id) {
18 | // ...
19 | throw new UnsupportedOperationException();
20 | }
21 |
22 | public void delete(final BankTransaction bankTransaction) {
23 | // ...
24 | throw new UnsupportedOperationException();
25 | }
26 | }
27 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankStatementFullParser.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 |
4 | public class BankStatementFullParser {
5 |
6 | BankTransaction parseFromCSV(final String line) {
7 | // ...
8 | throw new UnsupportedOperationException();
9 | }
10 |
11 | BankTransaction parseFromJSON(final String line) {
12 | // ...
13 | throw new UnsupportedOperationException();
14 | }
15 |
16 | BankTransaction parseFromXML(final String line) {
17 | // ...
18 | throw new UnsupportedOperationException();
19 | }
20 | }
21 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankStatementParser.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | import java.util.List;
4 |
5 | public interface BankStatementParser {
6 | BankTransaction parseFrom(String line);
7 | List parseLinesFrom(List lines);
8 | }
9 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankStatementProcessor.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | import java.time.Month;
4 | import java.util.List;
5 |
6 | public class BankStatementProcessor {
7 | private final List bankTransactions;
8 |
9 | public BankStatementProcessor(final List bankTransactions) {
10 | this.bankTransactions = bankTransactions;
11 | }
12 |
13 | public double calculateTotalAmount() {
14 | double total = 0;
15 | for (final BankTransaction bankTransaction : bankTransactions) {
16 | total += bankTransaction.getAmount();
17 | }
18 | return total;
19 | }
20 |
21 | public double calculateTotalInMonth(final Month month) {
22 | double total = 0;
23 | for (final BankTransaction bankTransaction : bankTransactions) {
24 | if (bankTransaction.getDate().getMonth() == month) {
25 |
26 | total += bankTransaction.getAmount();
27 | }
28 | }
29 | return total;
30 | }
31 |
32 | public double calculateTotalForCategory(final String category) {
33 | double total = 0;
34 | for (final BankTransaction bankTransaction : bankTransactions) {
35 | if (bankTransaction.getDescription().equals(category)) {
36 | total += bankTransaction.getAmount();
37 | }
38 | }
39 | return total;
40 | }
41 | }
42 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/BankTransaction.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | import java.time.LocalDate;
4 | import java.util.Objects;
5 |
6 | public class BankTransaction {
7 | private final LocalDate date;
8 | private final double amount;
9 | private final String description;
10 |
11 |
12 | public BankTransaction(final LocalDate date, final double amount, final String description) {
13 | this.date = date;
14 | this.amount = amount;
15 | this.description = description;
16 | }
17 |
18 | public LocalDate getDate() {
19 | return date;
20 | }
21 |
22 | public double getAmount() {
23 | return amount;
24 | }
25 |
26 | public String getDescription() {
27 | return description;
28 | }
29 |
30 | @Override
31 | public String toString() {
32 | return "BankTransaction{" +
33 | "date=" + date +
34 | ", amount=" + amount +
35 | ", description='" + description + '\'' +
36 | '}';
37 | }
38 |
39 | @Override
40 | public boolean equals(Object o) {
41 | if (this == o) return true;
42 | if (o == null || getClass() != o.getClass()) return false;
43 | BankTransaction that = (BankTransaction) o;
44 | return Double.compare(that.amount, amount) == 0 &&
45 | date.equals(that.date) &&
46 | description.equals(that.description);
47 | }
48 |
49 | @Override
50 | public int hashCode() {
51 | return Objects.hash(date, amount, description);
52 | }
53 |
54 |
55 | }
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_02/MainApplication.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_02;
2 |
3 | public class MainApplication {
4 |
5 | public static void main(String[] args) throws Exception {
6 |
7 | final BankStatementAnalyzer bankStatementAnalyzer
8 | = new BankStatementAnalyzer();
9 |
10 | final BankStatementParser bankStatementParser
11 | = new BankStatementCSVParser();
12 |
13 | bankStatementAnalyzer.analyze("bank-data-simple.csv", bankStatementParser);
14 |
15 | }
16 | }
17 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_03/BankStatementAnalyzer.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_03;
2 |
3 |
4 |
5 |
6 | import java.io.IOException;
7 | import java.nio.file.Files;
8 | import java.nio.file.Path;
9 | import java.nio.file.Paths;
10 | import java.time.Month;
11 | import java.util.List;
12 |
13 | public class BankStatementAnalyzer {
14 | private static final String RESOURCES = "src/main/resources/";
15 |
16 | public void analyze(final String fileName,
17 | final BankStatementParser bankStatementParser,
18 | final Exporter exporter) throws IOException {
19 |
20 | final Path path = Paths.get(RESOURCES + fileName);
21 | final List lines = Files.readAllLines(path);
22 |
23 | final List bankTransactions = bankStatementParser.parseLinesFrom(lines);
24 |
25 | final BankStatementProcessor bankStatementProcessor = new BankStatementProcessor(bankTransactions);
26 |
27 | final SummaryStatistics summaryStatistics = bankStatementProcessor.summarizeTransactions();
28 |
29 | System.out.println(exporter.export(summaryStatistics));
30 |
31 | }
32 |
33 |
34 | }
35 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_03/BankStatementCSVParser.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_03;
2 |
3 | import java.time.LocalDate;
4 | import java.time.format.DateTimeFormatter;
5 | import java.util.List;
6 |
7 | import static java.util.stream.Collectors.toList;
8 |
9 | public class BankStatementCSVParser implements BankStatementParser {
10 |
11 | private static final DateTimeFormatter DATE_PATTERN = DateTimeFormatter.ofPattern("dd-MM-yyyy");
12 |
13 | public BankTransaction parseFrom(final String line) {
14 | final String[] columns = line.split(",");
15 |
16 | final LocalDate date = LocalDate.parse(columns[0], DATE_PATTERN);
17 | final double amount = Double.parseDouble(columns[1]);
18 |
19 | return new BankTransaction(date, amount, columns[2]);
20 | }
21 |
22 | public List parseLinesFrom(final List lines) {
23 | return lines.stream().map(this::parseFrom).collect(toList());
24 | }
25 | }
26 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_03/BankStatementParser.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_03;
2 |
3 | import java.util.List;
4 |
5 | public interface BankStatementParser {
6 | BankTransaction parseFrom(String line);
7 | List parseLinesFrom(List lines);
8 | }
9 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_03/BankStatementProcessor.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_03;
2 |
3 | import java.time.Month;
4 | import java.util.ArrayList;
5 | import java.util.DoubleSummaryStatistics;
6 | import java.util.List;
7 |
8 | public class BankStatementProcessor {
9 |
10 | private final List bankTransactions;
11 |
12 | public BankStatementProcessor(final List bankTransactions) {
13 | this.bankTransactions = bankTransactions;
14 | }
15 |
16 | public SummaryStatistics summarizeTransactions() {
17 |
18 | final DoubleSummaryStatistics doubleSummaryStatistics = bankTransactions.stream()
19 | .mapToDouble(BankTransaction::getAmount)
20 | .summaryStatistics();
21 |
22 | return new SummaryStatistics(doubleSummaryStatistics.getSum(),
23 | doubleSummaryStatistics.getMax(),
24 | doubleSummaryStatistics.getMin(),
25 | doubleSummaryStatistics.getAverage());
26 | }
27 |
28 | public double summarizeTransactions(final BankTransactionSummarizer bankTransactionSummarizer) {
29 | double result = 0;
30 | for (final BankTransaction bankTransaction : bankTransactions) {
31 | result = bankTransactionSummarizer.summarize(result, bankTransaction);
32 | }
33 | return result;
34 | }
35 |
36 | public double calculateTotalInMonth(final Month month) {
37 | return summarizeTransactions((acc, bankTransaction) ->
38 | bankTransaction.getDate().getMonth() == month ? acc + bankTransaction.getAmount() : acc);
39 | }
40 |
41 | public List findTransactionsGreaterThanEqual(final int amount) {
42 | return findTransactions(bankTransaction -> bankTransaction.getAmount() >= amount);
43 | }
44 |
45 | public List findTransactions(final BankTransactionFilter bankTransactionFilter) {
46 | final List result = new ArrayList<>();
47 | for (final BankTransaction bankTransaction : bankTransactions) {
48 | if (bankTransactionFilter.test(bankTransaction)) {
49 | result.add(bankTransaction);
50 | }
51 | }
52 | return result;
53 | }
54 | }
55 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_03/BankTransaction.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_03;
2 |
3 | import java.time.LocalDate;
4 | import java.util.Objects;
5 |
6 | public class BankTransaction {
7 | private final LocalDate date;
8 | private final double amount;
9 | private final String description;
10 |
11 |
12 | public BankTransaction(final LocalDate date, final double amount, final String description) {
13 | this.date = date;
14 | this.amount = amount;
15 | this.description = description;
16 | }
17 |
18 | public LocalDate getDate() {
19 | return date;
20 | }
21 |
22 | public double getAmount() {
23 | return amount;
24 | }
25 |
26 | public String getDescription() {
27 | return description;
28 | }
29 |
30 | @Override
31 | public String toString() {
32 | return "BankTransaction{" +
33 | "date=" + date +
34 | ", amount=" + amount +
35 | ", description='" + description + '\'' +
36 | '}';
37 | }
38 |
39 | @Override
40 | public boolean equals(Object o) {
41 | if (this == o) return true;
42 | if (o == null || getClass() != o.getClass()) return false;
43 | BankTransaction that = (BankTransaction) o;
44 | return Double.compare(that.amount, amount) == 0 &&
45 | date.equals(that.date) &&
46 | description.equals(that.description);
47 | }
48 |
49 | @Override
50 | public int hashCode() {
51 | return Objects.hash(date, amount, description);
52 | }
53 |
54 |
55 | }
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_03/BankTransactionFilter.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_03;
2 |
3 | @FunctionalInterface
4 | public interface BankTransactionFilter {
5 | boolean test(BankTransaction bankTransaction);
6 | }
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_03/BankTransactionSummarizer.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_03;
2 |
3 | @FunctionalInterface
4 | public interface BankTransactionSummarizer {
5 | double summarize(double accumulator, BankTransaction bankTransaction);
6 | }
7 |
8 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_03/Exporter.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_03;
2 |
3 | public interface Exporter {
4 | String export(SummaryStatistics summaryStatistics);
5 | }
6 |
7 |
--------------------------------------------------------------------------------
/src/main/java/com/iteratrlearning/shu_book/chapter_03/HtmlExporter.java:
--------------------------------------------------------------------------------
1 | package com.iteratrlearning.shu_book.chapter_03;
2 |
3 | public class HtmlExporter implements Exporter {
4 | @Override
5 | public String export(final SummaryStatistics summaryStatistics) {
6 | String result = "";
7 | result += "";
8 | result += "Bank Transaction Report";
9 | result += "";
10 | result += "
";
11 | result += "
The sum is: " + summaryStatistics.getSum() + "
";
12 | result += "
The average is: " + summaryStatistics.getAverage() + "