ITEEDU

Hibernate Gossip: Interceptor 界面

package org.hibernate;

import java.io.Serializable;

import java.util.Iterator;

import org.hibernate.type.Type;

public interface Interceptor {
    // 加载对象之前执行
    public boolean onLoad(Object entity, Serializable id, Object[] state, String[]
       propertyNames, Type[] types) throws CallbackException;
    // flush 时，如果发现有Dirty data，则执行此方法
    public boolean onFlushDirty(Object entity, Serializable id, Object[]
      currentState, Object[] previousState, String[] propertyNames, Type[]
      types) throws CallbackException;
    // 储存对象前执行
    public boolean onSave(Object entity, Serializable id, Object[] state, String[]
      propertyNames, Type[] types) throws CallbackException;
    // 删除对象前执行
    public void onDelete(Object entity, Serializable id, Object[] state, String[]
      propertyNames, Type[] types) throws CallbackException;
    // 在 flush 前执行
   public void preFlush(Iterator entities) throws CallbackException;
    // 在 flush 后执行
    public void postFlush(Iterator entities) throws CallbackException;
    // 判断传入的对象是否为 transient 状态
    public Boolean isTransient(Object entity);
    // flush 前呼叫这个方法判断 Dirty data
    // 传回Dirty data属性索引或null采预设行为
    public int[] findDirty(Object entity, Serializable id, Object[] currentState,
         Object[] previousState, String[] propertyNames, Type[] types);
    // 手动建立实体对象，如果传回 null，则使用预设的建构方法建立实例
    public Object instantiate(String entityName, EntityMode entityMode,
         Serializable id) throws CallbackException;
    // 传回实体名称
    public String getEntityName(Object object) throws CallbackException;
    // 取得实体对象
    public Object getEntity(String entityName, Serializable id) throws CallbackException;
    // beginTransaction() 之后执行
    public void afterTransactionBegin(Transaction tx);
    // 在事务完成前执行
    public void beforeTransactionCompletion(Transaction tx);
    // 在事务完成后执行
    public void afterTransactionCompletion(Transaction tx);
}

package onlyfun.caterpillar;

....

public class SomeInterceptor implements Interceptor {

    ....
}

SomeInterceptor someInterceptor = new SomeInterceptor();

Session session = sessionFactory.openSession(someInterceptor);

....