GOF23的一些总结（十四）

package com.dasenlin.baidu;
/**
* 自己定义的对象
* @author Administrator
*
*/
public interface MyIterator {

void first();
void next();
boolean hasNext();

boolean isFirst();
boolean isLast();

Object getCurrentObj();
}

package com.dasenlin.baidu;

import java.util.ArrayList;
import java.util.List;

/**
* 自定义的聚合类
* @author Administrator
*
*/
public class ConcreateMyAggregate {

private List<Object> list = new ArrayList<Object>();

/*  public ConcreateMyAggregate(List<Object> list) {
super();
this.list = list;
}*/

public void addObject(Object obj){
this.list.add(obj);
}

public void removeObject(Object obj){
this.list.remove(obj);
}

public List<Object> getList() {
return list;
}

public void setList(List<Object> list) {
this.list = list;
}

public MyIterator createIterator(){
return new ConcreateIterator();
}

private class ConcreateIterator implements MyIterator{

private int cursor;

@Override
public void first() {
cursor=0;
}

@Override
public void next() {
if(cursor<list.size()){
cursor++;
}
}

@Override
public boolean hasNext() {
if(cursor<list.size()){
return true;
}
return false;
}

@Override
public boolean isFirst() {
return cursor==0?true:false;
}

@Override
public boolean isLast() {
return cursor==(list.size()-1)?true:false;
}

@Override
public Object getCurrentObj() {
return list.get(cursor);
}

}

}

package com.dasenlin.baidu;

public class Client {

/**
* @param args
*/
public static void main(String[] args) {
ConcreateMyAggregate cma = new ConcreateMyAggregate();
cma.addObject("aa");
cma.addObject("bb");
cma.addObject("cc");
MyIterator iter = cma.createIterator();
while(iter.hasNext()){
System.out.println(iter.getCurrentObj());
iter.next();
}
}

}