org.hibernate.criterion.SizeExpression Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008-2011, Red Hat Inc. 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 Inc.
*
* 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.
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package org.hibernate.criterion;
import org.hibernate.Criteria;
import org.hibernate.EntityMode;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.TypedValue;
import org.hibernate.persister.collection.QueryableCollection;
import org.hibernate.persister.entity.Loadable;
import org.hibernate.sql.ConditionFragment;
import org.hibernate.type.StandardBasicTypes;
/**
* @author Gavin King
*/
public class SizeExpression implements Criterion {
private final String propertyName;
private final int size;
private final String op;
protected SizeExpression(String propertyName, int size, String op) {
this.propertyName = propertyName;
this.size = size;
this.op = op;
}
public String toString() {
return propertyName + ".size" + op + size;
}
public String toSqlString(Criteria criteria, CriteriaQuery criteriaQuery)
throws HibernateException {
String role = criteriaQuery.getEntityName(criteria, propertyName) +
'.' +
criteriaQuery.getPropertyName(propertyName);
QueryableCollection cp = (QueryableCollection) criteriaQuery.getFactory()
.getCollectionPersister(role);
//String[] fk = StringHelper.qualify( "collection_", cp.getKeyColumnNames() );
String[] fk = cp.getKeyColumnNames();
String[] pk = ( (Loadable) cp.getOwnerEntityPersister() ).getIdentifierColumnNames(); //TODO: handle property-ref
return "? " +
op +
" (select count(*) from " +
cp.getTableName() +
//" collection_ where " +
" where " +
new ConditionFragment()
.setTableAlias( criteriaQuery.getSQLAlias(criteria, propertyName) )
.setCondition(pk, fk)
.toFragmentString() +
")";
}
public TypedValue[] getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery)
throws HibernateException {
return new TypedValue[] {
new TypedValue( StandardBasicTypes.INTEGER, size, EntityMode.POJO )
};
}
}