/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, 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.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.ejb.criteria.path;
import java.io.Serializable;
import javax.persistence.criteria.From;
import javax.persistence.criteria.JoinType;
import javax.persistence.metamodel.Attribute;
import org.hibernate.ejb.criteria.CriteriaBuilderImpl;
import org.hibernate.ejb.criteria.CriteriaQueryCompiler;
import org.hibernate.ejb.criteria.CriteriaSubqueryImpl;
import org.hibernate.ejb.criteria.FromImplementor;
import org.hibernate.ejb.criteria.JoinImplementor;
import org.hibernate.ejb.criteria.PathSource;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public abstract class AbstractJoinImpl<Z, X>
extends AbstractFromImpl<Z, X>
implements JoinImplementor<Z,X>, Serializable {
private final Attribute<? super Z, ?> joinAttribute;
private final JoinType joinType;
public AbstractJoinImpl(
CriteriaBuilderImpl criteriaBuilder,
PathSource<Z> pathSource,
Attribute<? super Z, X> joinAttribute,
JoinType joinType) {
this( criteriaBuilder, joinAttribute.getJavaType(), pathSource, joinAttribute, joinType );
}
public AbstractJoinImpl(
CriteriaBuilderImpl criteriaBuilder,
Class<X> javaType,
PathSource<Z> pathSource,
Attribute<? super Z, ?> joinAttribute,
JoinType joinType) {
super( criteriaBuilder, javaType, pathSource );
this.joinAttribute = joinAttribute;
this.joinType = joinType;
}
/**
* {@inheritDoc}
*/
public Attribute<? super Z, ?> getAttribute() {
return joinAttribute;
}
/**
* {@inheritDoc}
*/
public JoinType getJoinType() {
return joinType;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "unchecked" })
public From<?, Z> getParent() {
// this cast should be ok by virtue of our constructors...
return (From<?, Z>) getPathSource();
}
public String renderTableExpression(CriteriaQueryCompiler.RenderingContext renderingContext) {
prepareAlias( renderingContext );
( (FromImplementor) getParent() ).prepareAlias( renderingContext );
return getParent().getAlias() + '.' + getAttribute().getName() + " as " + getAlias();
}
public JoinImplementor<Z, X> correlateTo(CriteriaSubqueryImpl subquery) {
return (JoinImplementor<Z, X>) super.correlateTo( subquery );
}
}