parent.java

hibernate方便的操作数据库相当不错的 请各位下载看看啊

//$Id: Parent.java,v 1.2 2004/12/05 21:30:17 epbernard Exp $
package org.hibernate.test.metadata.manytoone;

import javax.ejb.Entity;
import javax.ejb.AccessType;
import javax.ejb.Id;
import java.io.Serializable;

/**
 * @author Emmanuel Bernard
 */
@Entity(access = AccessType.FIELD)
public class Parent implements Serializable {
	@Id
	public ParentPk id;
	public int age;

	public int hashCode() {
		//a NPE can occurs, but I don't expect hashcode to be used before pk is set
		return id.hashCode();
	}

	public boolean equals(Object obj) {
		//a NPE can occurs, but I don't expect equals to be used before pk is set
		if (obj != null && obj instanceof Parent) {
			return id.equals( ( (Parent) obj).id );
		}
		else {
			return false;
		}
	}
}