/*
* 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.dialect.PostgreSQLDialect;
import org.hibernate.engine.TypedValue;
/**
* A case-insensitive "like"
* @author Gavin King
*/
public class IlikeExpression implements Criterion {
private final String propertyName;
private final Object value;
protected IlikeExpression(String propertyName, Object value) {
this.propertyName = propertyName;
this.value = value;
}
protected IlikeExpression(String propertyName, String value, MatchMode matchMode) {
this( propertyName, matchMode.toMatchString(value) );
}
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("ilike may only be used with single-column properties");
if ( dialect instanceof PostgreSQLDialect ) {
return columns[0] + " ilike ?";
}
else {
return dialect.getLowercaseFunction() + '(' + columns[0] + ") like ?";
}
//TODO: get SQL rendering out of this package!
}
public TypedValue[] getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery)
throws HibernateException {
return new TypedValue[] { criteriaQuery.getTypedValue( criteria, propertyName, value.toString().toLowerCase() ) };
}
public String toString() {
return propertyName + " ilike " + value;
}
}