/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.criterion;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.TypedValue;
/**
* A criterion representing a "like" expression
*
* @author Scott Marlow
* @author Steve Ebersole
*/
public class LikeExpression implements Criterion {
private final String propertyName;
private final Object value;
private final Character escapeChar;
private final boolean ignoreCase;
protected LikeExpression(
String propertyName,
String value,
Character escapeChar,
boolean ignoreCase) {
this.propertyName = propertyName;
this.value = value;
this.escapeChar = escapeChar;
this.ignoreCase = ignoreCase;
}
protected LikeExpression(
String propertyName,
String value) {
this( propertyName, value, null, false );
}
protected LikeExpression(
String propertyName,
String value,
MatchMode matchMode) {
this( propertyName, matchMode.toMatchString( value ) );
}
protected LikeExpression(
String propertyName,
String value,
MatchMode matchMode,
Character escapeChar,
boolean ignoreCase) {
this( propertyName, matchMode.toMatchString( value ), escapeChar, ignoreCase );
}
public String toSqlString(
Criteria criteria,
CriteriaQuery criteriaQuery) throws HibernateException {
Dialect dialect = criteriaQuery.getFactory().getDialect();
String[] columns = criteriaQuery.getColumnsUsingProjection( criteria, propertyName );
if ( columns.length != 1 ) {
throw new HibernateException( "Like may only be used with single-column properties" );
}
String lhs = ignoreCase
? dialect.getLowercaseFunction() + '(' + columns[0] + ')'
: columns[0];
return lhs + " like ?" + ( escapeChar == null ? "" : " escape \'" + escapeChar + "\'" );
}
public TypedValue[] getTypedValues(
Criteria criteria,
CriteriaQuery criteriaQuery) throws HibernateException {
return new TypedValue[] {
criteriaQuery.getTypedValue( criteria, propertyName, value.toString().toLowerCase() )
};
}
}