Commit 69be2a2

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deeper

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安全的组合模式

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Lines changed: 4 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -4,9 +4,12 @@`
`4`	`4`	`* 总结:`
`5`	`5`	`* 组合模式比较简单,用的也不多`
`6`	`6`	`* 组合模式分为两种: 1.安全的组合模式 2.不安全的组合模式(透明的组合模式)`
	`7`	`+ *`
	`8`	`+ * 本模式用了3个例子,1.安全的组合模式 2.不安全的组合模式 3.文件夹和文件案例`
	`9`	`+ * 建议使用安全的组合模式,安卓View和ViewGroup即为【安全的组合模式】`
`7`	`10`	`*/`
`8`	`11`	`public class Demo {`
`9`	`12`	`public static void main(String[] args) {`
`10`		`-`
	`13`	`+ // nothing to do`
`11`	`14`	`}`
`12`	`15`	`}`

Lines changed: 13 additions & 0 deletions

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`@@ -0,0 +1,13 @@`
	`1`	`+package com.ruoxu.pattern.composite.safe;`
	`2`	`+/**`
	`3`	`+ * 抽象根节点`
	`4`	`+ */`
	`5`	`+public abstract class Component {`
	`6`	`+ protected String name; // 节点名`
	`7`	`+`
	`8`	`+ public Component(String name) {`
	`9`	`+ this.name = name;`
	`10`	`+ }`
	`11`	`+`
	`12`	`+ public abstract void doSomething();`
	`13`	`+}`

Lines changed: 46 additions & 0 deletions

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`@@ -0,0 +1,46 @@`
	`1`	`+package com.ruoxu.pattern.composite.safe;`
	`2`	`+`
	`3`	`+import java.util.ArrayList;`
	`4`	`+import java.util.List;`
	`5`	`+`
	`6`	`+/**`
	`7`	`+ * 具体枝干节点(相当于文件夹)`
	`8`	`+ */`
	`9`	`+public class Composite extends Component{`
	`10`	`+ private List<Component> components = new ArrayList<>();`
	`11`	`+`
	`12`	`+ public Composite(String name) {`
	`13`	`+ super(name);`
	`14`	`+ }`
	`15`	`+`
	`16`	`+ @Override`
	`17`	`+ public void doSomething() {`
	`18`	`+ System.out.println(name);`
	`19`	`+ if(null != components){`
	`20`	`+ for(Component c: components){`
	`21`	`+ c.doSomething();`
	`22`	`+ }`
	`23`	`+ }`
	`24`	`+ }`
	`25`	`+`
	`26`	`+ /**`
	`27`	`+ * 添加子节点`
	`28`	`+ */`
	`29`	`+ public void addChild(Component child){`
	`30`	`+ components.add(child);`
	`31`	`+ }`
	`32`	`+`
	`33`	`+ /**`
	`34`	`+ * 移除子节点`
	`35`	`+ */`
	`36`	`+ public void removeChild(Component child){`
	`37`	`+ components.remove(child);`
	`38`	`+ }`
	`39`	`+`
	`40`	`+ /**`
	`41`	`+ * 获取子节点`
	`42`	`+ */`
	`43`	`+ public Component getChild(int index){`
	`44`	`+ return components.get(index);`
	`45`	`+ }`
	`46`	`+}`

Lines changed: 21 additions & 0 deletions

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`@@ -0,0 +1,21 @@`
	`1`	`+package com.ruoxu.pattern.composite.safe;`
	`2`	`+`
	`3`	`+public class Demo {`
	`4`	`+ public static void main(String[] args) {`
	`5`	`+ Composite root = new Composite("root");`
	`6`	`+`
	`7`	`+ Composite branch1 = new Composite("branch1");`
	`8`	`+ Composite branch2 = new Composite("branch2");`
	`9`	`+`
	`10`	`+ Leaf leaf1 = new Leaf("leaf1");`
	`11`	`+ Leaf leaf2 = new Leaf("leaf2");`
	`12`	`+`
	`13`	`+ branch1.addChild(leaf1);`
	`14`	`+ branch2.addChild(leaf2);`
	`15`	`+`
	`16`	`+ root.addChild(branch1);`
	`17`	`+ root.addChild(branch2);`
	`18`	`+`
	`19`	`+ root.doSomething();`
	`20`	`+ }`
	`21`	`+}`

Lines changed: 16 additions & 0 deletions

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`@@ -0,0 +1,16 @@`
	`1`	`+package com.ruoxu.pattern.composite.safe;`
	`2`	`+/**`
	`3`	`+ * 叶子结点`
	`4`	`+ */`
	`5`	`+public class Leaf extends Component{`
	`6`	`+`
	`7`	`+ public Leaf(String name) {`
	`8`	`+ super(name);`
	`9`	`+ }`
	`10`	`+`
	`11`	`+ @Override`
	`12`	`+ public void doSomething() {`
	`13`	`+ System.out.println(name);`
	`14`	`+ }`
	`15`	`+`
	`16`	`+}`

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