/*
* 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 java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.TypedValue;
import org.hibernate.internal.util.StringHelper;
/**
* A sequence of a logical expressions combined by some
* associative logical operator
*
* @author Gavin King
*/
public class Junction implements Criterion {
private final List criteria = new ArrayList();
private final String op;
protected Junction(String op) {
this.op = op;
}
public Junction add(Criterion criterion) {
criteria.add(criterion);
return this;
}
public String getOp() {
return op;
}
public TypedValue[] getTypedValues(Criteria crit, CriteriaQuery criteriaQuery)
throws HibernateException {
ArrayList typedValues = new ArrayList();
Iterator iter = criteria.iterator();
while ( iter.hasNext() ) {
TypedValue[] subvalues = ( (Criterion) iter.next() ).getTypedValues(crit, criteriaQuery);
for ( int i=0; i<subvalues.length; i++ ) {
typedValues.add( subvalues[i] );
}
}
return (TypedValue[]) typedValues.toArray( new TypedValue[ typedValues.size() ] );
}
public String toSqlString(Criteria crit, CriteriaQuery criteriaQuery)
throws HibernateException {
if ( criteria.size()==0 ) return "1=1";
StringBuffer buffer = new StringBuffer()
.append('(');
Iterator iter = criteria.iterator();
while ( iter.hasNext() ) {
buffer.append( ( (Criterion) iter.next() ).toSqlString(crit, criteriaQuery) );
if ( iter.hasNext() ) buffer.append(' ').append(op).append(' ');
}
return buffer.append(')').toString();
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
return '(' + StringHelper.join( ' ' + op + ' ', criteria.iterator() ) + ')';
}
}