categoryutil.java

是一个Bug系统

package com.runwit.ebookstore.services.dao;

import java.util.ArrayList;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;

import com.runwit.ebookstore.model.CategoryModel;

public class CategoryUtil {

//	public static class ParentComparator implements Comparator {
//		public int compare(Object o1, Object o2) {
//			CategoryModel m1 = (CategoryModel)o1;
//			CategoryModel m2 = (CategoryModel)o2;
//			
//			return m1.getParentId() - m2.getParentId();
//		}
//		
//	}
	
	public static List getChildren(List categories, int parent_id) {
		List retList = new ArrayList();
		if(categories != null) {
			Iterator iter = categories.iterator();
			while(iter.hasNext()) {
				CategoryModel m = (CategoryModel)iter.next();
				if(m.getParentId() == parent_id) {
					retList.add(m);
				}
			}
		}
		return retList;
	}
	
}