nonbatchingbatcher.java

来自「用Java实现的23个常用设计模式源代码」· Java 代码 · 共 38 行

//$Id: NonBatchingBatcher.java,v 1.4.2.3 2003/08/04 11:26:46 oneovthafew Exp $
package net.sf.hibernate.impl;

import java.sql.PreparedStatement;
import java.sql.SQLException;

import net.sf.hibernate.HibernateException;
import net.sf.hibernate.engine.SessionImplementor;

/**
 * An implementation of the <tt>Batcher</tt> interface that does no batching
 * 
 * @author Gavin King
 */
public class NonBatchingBatcher extends BatcherImpl {
	
	public NonBatchingBatcher(SessionImplementor session) {
		super(session);
	}
	
	public void addToBatch(int expectedRowCount) throws SQLException, HibernateException {
		int rowCount = getStatement().executeUpdate();
		//negative expected row count means we don't know how many rows to expect
		if ( expectedRowCount>0 && expectedRowCount!=rowCount )
			throw new HibernateException("SQL update or deletion failed (row not found)");
	}
	
	protected void doExecuteBatch(PreparedStatement ps) throws SQLException, HibernateException {
	}
	
}