/*
* ContainsExpression.java
*
* PostGIS extension for PostgreSQL JDBC driver - EJB3 Tutorial
*
* (C) 2006 Norman Barker <norman.barker@gmail.com>
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 2.1 of the License.
*
* This library 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 library; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or visit the web at
* http://www.gnu.org.
*
* $Id$
*/
package org.postgis.hibernate;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.EntityMode;
import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.criterion.CriteriaQuery;
import org.hibernate.criterion.Criterion;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.engine.TypedValue;
import org.postgis.Geometry;
/**
* @author nbarker
*
*/
public class ContainsExpression implements Criterion{
private static final long serialVersionUID = 1L;
private String propertyName;
private Geometry geom;
public ContainsExpression(String propertyName, Geometry geom)
{
this.propertyName = propertyName;
this.geom = geom;
}
public TypedValue[] getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException {
return new TypedValue[]{new TypedValue(Hibernate.custom(GeometryType.class), geom, EntityMode.POJO)};
}
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("\"contains\" may only be used with single-column properties");
if ( dialect instanceof PostGISDialect) {
StandardSQLFunction function = (StandardSQLFunction)dialect.getFunctions().get(PostGISDialect.NAMESPACE + "contains");
List args = new ArrayList();
args.add(columns[0]);
args.add("?");
return function.render(args, criteriaQuery.getFactory());
}
else
{
throw new HibernateException("\"contains\" may only be used with a spatial hibernate dialect");
}
}
public String toString()
{
return propertyName + " contains " + geom;
}
}