simplesubqueryexpression.java

一个Java持久层类库

//$Id: SimpleSubqueryExpression.java 5757 2005-02-18 03:47:27Z oneovthafew $
package org.hibernate.criterion;

import org.hibernate.Criteria;
import org.hibernate.EntityMode;
import org.hibernate.HibernateException;
import org.hibernate.engine.TypedValue;

/**
 * A comparison between a constant value and the the result of a subquery
 * @author Gavin King
 */
public class SimpleSubqueryExpression extends SubqueryExpression {
	
	private Object value;
	
	protected SimpleSubqueryExpression(Object value, String op, String quantifier, DetachedCriteria dc) {
		super(op, quantifier, dc);
		this.value = value;
	}
	
	
	public TypedValue[] getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery) 
	throws HibernateException {
		TypedValue[] superTv = super.getTypedValues(criteria, criteriaQuery);
		TypedValue[] result = new TypedValue[superTv.length+1];
		System.arraycopy(superTv, 0, result, 1, superTv.length);
		result[0] = new TypedValue( getTypes()[0], value, EntityMode.POJO );
		return result;
	}
	
	protected String toLeftSqlString(Criteria criteria, CriteriaQuery criteriaQuery) {
		return "?";
	}
}