PatternAdapter: Initial commit

System Development/PatternAdapter/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

System Development/PatternAdapter/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>PatternAdapter</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>

System Development/PatternAdapter/.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=11
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=11
+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.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=11

System Development/PatternAdapter/src/Adapter.java

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+interface ILightningPhone {
+    void recharge();
+    void useLightning();
+}
+
+interface IMicroUsbPhone {
+    void recharge();
+    void useMicroUsb();
+}
+
+class Iphone implements ILightningPhone {
+    private boolean connector;
+
+    @Override
+    public void useLightning() {
+        connector = true;
+        System.out.println("Lightning connected");
+    }
+
+    @Override
+    public void recharge() {
+        if (connector) {
+            System.out.println("Recharge started");
+            System.out.println("Recharge finished");
+        } else {
+            System.out.println("Connect Lightning first");
+        }
+    }
+}
+
+class Android implements IMicroUsbPhone {
+    private boolean connector;
+
+    @Override
+    public void useMicroUsb() {
+        connector = true;
+        System.out.println("MicroUsb connected");
+    }
+
+    @Override
+    public void recharge() {
+        if (connector) {
+            System.out.println("Recharge started");
+            System.out.println("Recharge finished");
+        } else {
+            System.out.println("Connect MicroUsb first");
+        }
+    }
+}
+/* exposing the target interface while wrapping source object */
+class LightningToMicroUsbAdapter implements IMicroUsbPhone {
+    private final ILightningPhone lightningPhone;
+
+    public LightningToMicroUsbAdapter(ILightningPhone lightningPhone) {
+        this.lightningPhone = lightningPhone;
+    }
+
+    @Override
+    public void useMicroUsb() {
+        System.out.println("MicroUsb connected");
+        lightningPhone.useLightning();
+    }
+
+    @Override
+    public void recharge() {
+        lightningPhone.recharge();
+    }
+}
+
+public class Adapter {
+    static void rechargeMicroUsbPhone(IMicroUsbPhone phone) {
+        phone.useMicroUsb();
+        phone.recharge();
+    }
+
+    static void rechargeLightningPhone(ILightningPhone phone) {
+        phone.useLightning();
+        phone.recharge();
+    }
+
+    public static void main(String[] args) {
+        Android android = new Android();
+        Iphone iPhone = new Iphone();
+
+        System.out.println("Recharging android with MicroUsb");
+        rechargeMicroUsbPhone(android);
+
+        System.out.println("Recharging iPhone with Lightning");
+        rechargeLightningPhone(iPhone);
+
+        System.out.println("Recharging iPhone with MicroUsb");
+        rechargeMicroUsbPhone(new LightningToMicroUsbAdapter (iPhone));
+    }
+}