betweenexpression.java

一个Java持久层类库

//$Id: BetweenExpression.java 5685 2005-02-12 07:19:50Z steveebersole $
package org.hibernate.criterion;


import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.engine.TypedValue;
import org.hibernate.util.StringHelper;

/**
 * Constrains a property to between two values
 * @author Gavin King
 */
public class BetweenExpression implements Criterion {

	private final String propertyName;
	private final Object lo;
	private final Object hi;

	protected BetweenExpression(String propertyName, Object lo, Object hi) {
		this.propertyName = propertyName;
		this.lo = lo;
		this.hi = hi;
	}

	public String toSqlString(Criteria criteria, CriteriaQuery criteriaQuery)
	throws HibernateException {
		return StringHelper.join(
			" and ",
			StringHelper.suffix( criteriaQuery.getColumnsUsingProjection(criteria, propertyName), " between ? and ?" )
		);

		//TODO: get SQL rendering out of this package!
	}

	public TypedValue[] getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery)
	throws HibernateException {
		return new TypedValue[] {
				criteriaQuery.getTypedValue(criteria, propertyName, lo),
				criteriaQuery.getTypedValue(criteria, propertyName, hi)
		};
	}

	public String toString() {
		return propertyName + " between " + lo + " and " + hi;
	}

}