commit

Composite/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

Composite/.gitignore

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+/bin/

Composite/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Composite</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

Composite/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8

Composite/src/Component.java

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+
+public interface Component {
+
+	public void operation();
+
+	public void addComponent(Component component);
+}

Composite/src/Composite.java

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+import java.util.ArrayList;
+import java.util.List;
+
+public class Composite implements Component {
+
+	private String label;
+
+	private List<Component> children;
+
+	public Composite(String label) {
+		this.label = label;
+		children = new ArrayList<Component>();
+	}
+
+	@Override
+	public void operation() {
+		System.out.println(label);
+		for(Component component:children)
+			component.operation();
+	}
+
+	public void addComponent(Component component) {
+		children.add(component);
+	}
+
+}

Composite/src/Leaf.java

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+
+public class Leaf implements Component {
+
+	private String label;
+
+	public Leaf(String label) {
+		this.label = label;
+	}
+
+	@Override
+	public void operation() {
+		System.out.println(label);
+	}
+
+	@Override
+	public void addComponent(Component component) {
+		throw new UnsupportedOperationException();
+	}
+
+}

Composite/src/Main.java

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+
+public class Main {
+
+	public static void main(String[] args) {
+
+		Component root = new Composite("1");
+
+		Component component1 = new Composite("2");
+		Component component2 = new Composite("3");
+		Component leaf = new Leaf("4");
+
+		root.addComponent(component1);
+		root.addComponent(component2);
+		root.addComponent(leaf);
+
+		Component leaf1 = new Leaf("5");
+		Component leaf2 = new Leaf("6");
+
+		component1.addComponent(leaf1);
+		component1.addComponent(leaf2);
+
+		Component leaf3 = new Leaf("7");
+		component2.addComponent(leaf3);
+		root.operation();
+	}
+}