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iluwatariluwatar
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added composite sample
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8 files changed

+184
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lines changed

‎composite/pom.xml‎

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<?xml version="1.0"?>
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<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>com.iluwatar</groupId>
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<artifactId>java-design-patterns</artifactId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<groupId>com.iluwatar</groupId>
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<artifactId>composite</artifactId>
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<version>1.0-SNAPSHOT</version>
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<name>composite</name>
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<url>http://maven.apache.org</url>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>3.8.1</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>

‎composite/src/main/java/com/iluwatar/App.java‎

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package com.iluwatar;
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public class App
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{
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public static void main( String[] args )
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{
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System.out.println("Message from the orcs: ");
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LetterComposite orcMessage = new Messenger().messageFromOrcs();
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orcMessage.print();
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System.out.println("\n");
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System.out.println("Message from the elves: ");
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LetterComposite elfMessage = new Messenger().messageFromElves();
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elfMessage.print();
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}
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}

‎composite/src/main/java/com/iluwatar/Letter.java‎

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package com.iluwatar;
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public class Letter extends LetterComposite {
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private char c;
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public Letter(char c) {
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this.c = c;
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}
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@Override
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protected void printThisBefore() {
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System.out.print(c);
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}
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@Override
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protected void printThisAfter() {
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// nop
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}
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}

‎composite/src/main/java/com/iluwatar/LetterComposite.java‎

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package com.iluwatar;
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import java.util.ArrayList;
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import java.util.List;
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public abstract class LetterComposite {
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private List<LetterComposite> children = new ArrayList<LetterComposite>();
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public void add(LetterComposite letter) {
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children.add(letter);
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}
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public int count() {
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return children.size();
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}
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protected abstract void printThisBefore();
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protected abstract void printThisAfter();
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public void print() {
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printThisBefore();
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for (LetterComposite letter: children) {
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letter.print();
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}
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printThisAfter();
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}
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}

‎composite/src/main/java/com/iluwatar/Messenger.java‎

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package com.iluwatar;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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public class Messenger {
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LetterComposite messageFromOrcs() {
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List<Word> words = new ArrayList<Word>();
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words.add(new Word(Arrays.asList(new Letter('W'), new Letter('h'), new Letter('e'), new Letter('r'), new Letter('e'))));
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words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter('r'), new Letter('e'))));
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words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s'))));
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words.add(new Word(Arrays.asList(new Letter('a'))));
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words.add(new Word(Arrays.asList(new Letter('w'), new Letter('h'), new Letter('i'), new Letter('p'))));
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words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter('r'), new Letter('e'))));
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words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s'))));
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words.add(new Word(Arrays.asList(new Letter('a'))));
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words.add(new Word(Arrays.asList(new Letter('w'), new Letter('a'), new Letter('y'))));
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return new Sentence(words);
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}
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LetterComposite messageFromElves() {
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List<Word> words = new ArrayList<Word>();
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words.add(new Word(Arrays.asList(new Letter('M'), new Letter('u'), new Letter('c'), new Letter('h'))));
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words.add(new Word(Arrays.asList(new Letter('w'), new Letter('i'), new Letter('n'), new Letter('d'))));
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words.add(new Word(Arrays.asList(new Letter('p'), new Letter('o'), new Letter('u'), new Letter('r'), new Letter('s'))));
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words.add(new Word(Arrays.asList(new Letter('f'), new Letter('r'), new Letter('o'), new Letter('m'))));
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words.add(new Word(Arrays.asList(new Letter('y'), new Letter('o'), new Letter('u'), new Letter('r'))));
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words.add(new Word(Arrays.asList(new Letter('m'), new Letter('o'), new Letter('u'), new Letter('t'), new Letter('h'))));
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return new Sentence(words);
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}
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}

‎composite/src/main/java/com/iluwatar/Sentence.java‎

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package com.iluwatar;
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import java.util.List;
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public class Sentence extends LetterComposite {
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public Sentence(List<Word> words) {
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for (Word w: words) {
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this.add(w);
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}
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}
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@Override
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protected void printThisBefore() {
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// nop
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}
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@Override
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protected void printThisAfter() {
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System.out.print(".");
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}
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}

‎composite/src/main/java/com/iluwatar/Word.java‎

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package com.iluwatar;
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import java.util.List;
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public class Word extends LetterComposite {
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public Word(List<Letter> letters) {
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for (Letter l: letters) {
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this.add(l);
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}
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}
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@Override
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protected void printThisBefore() {
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System.out.print(" ");
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}
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@Override
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protected void printThisAfter() {
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// nop
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}
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}

‎pom.xml‎

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<module>singleton</module>
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<module>adapter</module>
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<module>bridge</module>
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<module>composite</module>
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</modules>
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</project>

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