evictvisitor.java

用Java实现的23个常用设计模式源代码

//$Id: EvictVisitor.java,v 1.1.2.3 2003/11/21 09:46:26 oneovthafew Exp $
package net.sf.hibernate.impl;

import net.sf.hibernate.HibernateException;
import net.sf.hibernate.type.PersistentCollectionType;

/**
 * Evict any collections referenced by the object from the session cache. 
 * This will NOT pick up any collections that were dereferenced, so they 
 * will be deleted (suboptimal but not exactly incorrect).
 * 
 * @author Gavin King
 */
class EvictVisitor extends AbstractVisitor {

	EvictVisitor(SessionImpl session) {
		super(session);
	}

	Object processCollection(Object collection, PersistentCollectionType type)
		throws HibernateException {
		
		if (collection!=null) getSession().evictCollection(collection, type);
		
		return null;
	}

}