package adapter;

public abstract class BaseItem implements Item{

public final static int NO_USE_QUANTITY = 0;

protected int mQuantity = 0;

public BaseItem(int quantity) {

this.mQuantity = quantity;

}

}

package adapter;

import strategy.Monster;

import strategy.Slime;

import strategy.StrangeStone;

import util.JavaLog;

import decorate.Arrow;

import decorate.Fire;

import decorate.Ice;

import decorate.Weapon;

public class Go {

public static void main(String[] args) {

Weapon w1 = new Arrow();

Weapon w2 = new ItemToWeaponAdapter(new Banana());

Monster m1 = new Slime();

Monster m2 = new StrangeStone();

attack(w1, m1);

attack(w2, m1);

attack(w1, m2);

attack(w2, m2);

w1 = new Ice(w1);

w2 = new Fire(w2);

attack(w1, m1);

attack(w2, m1);

attack(w1, m2);

attack(w2, m2);

w1 = new Fire(w1);

w2 = new Fire(w2);

attack(w1, m1);

attack(w2, m1);

attack(w1, m2);

attack(w2, m2);

}

private static void attack(Weapon w ,Monster m){

JavaLog.d(w.getHurtVerb() + "對 " + m.getName() + "造成了" + w.makeDamage() + "傷害。");

}

}

package adapter;

public interface Item {

public String useWord();

}

package adapter;

import decorate.Weapon;

public class ItemToWeaponAdapter implements Weapon{

private Item mItem ;

public ItemToWeaponAdapter(Item item) {

this.mItem = item;

}

@Override

public int makeDamage() {

return 0;

}

@Override

public String getHurtVerb() {

return mItem.useWord();

}

}

##轉接器模式

轉接器模式：將一個類別的介面轉乘另一個介面以供其他類別或者客戶所使用。

轉接器讓原本不相容的介面可以合作。

譬如原本只有武器可以攻擊對手，我也想用道具去攻擊對手，我就製作一個ItemToWeapon的adapter，把道具丟進這個Adapter讓他像武器一樣用。

一些常見的還有像把Map 轉成Json Object也很合適去製作一個Adapter。