Category.java

package com.fang.bbks.modules.sys.entity;

import java.io.Serializable;
import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.OrderBy;
import javax.persistence.Table;
import javax.persistence.Transient;

import org.hibernate.annotations.Cache;
import org.hibernate.annotations.CacheConcurrencyStrategy;
import org.hibernate.annotations.NotFound;
import org.hibernate.annotations.NotFoundAction;
import org.hibernate.annotations.Where;

import com.fang.bbks.common.persistence.BaseEntity;
import com.google.common.collect.Lists;

/**
 * @Intro 书籍分类表
 * @author Lee
 * @Date 2013-8-1
 */

@SuppressWarnings("serial")
@Entity
@Table(name = "TB_CATEGORY")
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class Category extends BaseEntity{
	
	@Id
	@GeneratedValue(strategy=GenerationType.IDENTITY)
	private Long id;
	
	@ManyToOne(fetch = FetchType.LAZY)
	@JoinColumn(name="parent_id")
	@NotFound(action = NotFoundAction.IGNORE)
	@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
	private Category parent;// 父级菜单
	
	@OneToMany(cascade = {CascadeType.PERSIST,CascadeType.MERGE,CascadeType.REMOVE},fetch=FetchType.LAZY,mappedBy="parent")
	@Where(clause="del_flag='"+DEL_FLAG_NORMAL+"'")
	@NotFound(action = NotFoundAction.IGNORE)
	@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
	private List<Category> childList = Lists.newArrayList();
	
	private String name; 	// 分类名称
	private String intro; 	// 分类描述
    private String delFlag;	//删除标记（0：正常；1：删除）
	
	/**
	 * 
	 */
	public Category() {
		this.delFlag = DEL_FLAG_NORMAL;
	}
	public Category(Long id) {
		super();
		this.id = id;
	}
	public Category(String name,String intro) {
		super();
		this.name = name;
		this.intro = intro;
	}
	
	
	
	public String getDelFlag() {
		return delFlag;
	}
	public void setDelFlag(String delFlag) {
		this.delFlag = delFlag;
	}	
	public Long getId() {
		return id;
	}
	public void setId(Long id) {
		this.id = id;
	}
	public Category getParent() {
		return parent;
	}
	public void setParent(Category parent) {
		this.parent = parent;
	}
	public List<Category> getChildList() {
		return childList;
	}
	public void setChildList(List<Category> childList) {
		this.childList = childList;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getIntro() {
		return intro;
	}
	public void setIntro(String intro) {
		this.intro = intro;
	}
	
	
	@Transient
	public static void sortList(List<Category> list, List<Category> sourcelist, Long parentId){
		for (int i=0; i<sourcelist.size(); i++){
			Category e = sourcelist.get(i);
			if (e.getParent()!=null && e.getParent().getId()!=null
					&& e.getParent().getId().equals(parentId)){
				list.add(e);
				// 判断是否还有子节点, 有则继续获取子节点
				for (int j=0; j<sourcelist.size(); j++){
					Category child = sourcelist.get(j);
					if (child.getParent()!=null && child.getParent().getId()!=null
							&& child.getParent().getId().equals(e.getId())){
						sortList(list, sourcelist, e.getId());
						break;
					}
				}
			}
		}
	}

	@Transient
	public boolean isRoot(){
		return isRoot(this.id);
	}
	
	@Transient
	public static boolean isRoot(Long id){
		return id != null && id.equals(1L);
	}
}