adapter适配器模式
将两个不兼容的类纠合在一起,属于结构型模式,需要有adaptee(被适配者)和
adapter(适配器)
类再生的两种方式;组合composition和继承(inheritance)
示例代码:
/**
* 圆形桩接口
*
* @time 下午11:02:08
* @author retacn yue
* @Email
[email protected]
*/
public interface IRoundPeg {
public void insertIntohole(String msg);
}
/**
* 圆形桩
*
* @time 下午10:53:09
* @author retacn yue
* @Email
[email protected]
*/
public class RoundPag implements IRoundPeg {
public void insertIntohole(String msg) {
System.out.println("RoundPeg insertIntoHole():" + msg);
}
}
/**
* 方形桩接口
*
* @time 下午11:03:49
* @author retacn yue
* @Email
[email protected]
*/
public interface ISquarePeg {
public void insert(String str);
}
/**
* 方形桩
*
* @time 下午10:51:50
* @author retacn yue
* @Email
[email protected]
*/
public class SquarePeg implements ISquarePeg {
public void insert(String str) {
System.out.println("SquarePeg insert()" + str);
}
}
/**
* 适配器
*
* @time 下午10:55:57
* @author retacn yue
* @Email
[email protected]
*/
public class PegAdapter implements IRoundPeg, ISquarePeg {
// 适配者
private RoundPag roundPag;
private SquarePeg squarePeg;
/**
* 构造器
*
* @param roundPag
*/
public PegAdapter(RoundPag roundPag) {
this.roundPag = roundPag;
}
/**
* 构造器
*
* @param squarePeg
*/
public PegAdapter(SquarePeg squarePeg) {
this.squarePeg = squarePeg;
}
@Override
public void insert(String str) {
roundPag.insertIntohole(str);
}
@Override
public void insertIntohole(String msg) {
squarePeg.insert(msg);
}
}
对比一下android中的适配器是不是能体会到点什么?