/*
* 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.hql.internal.ast.tree;
import org.hibernate.QueryException;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.hql.spi.QueryTranslator;
import org.hibernate.internal.util.ReflectHelper;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.type.LiteralType;
import org.hibernate.type.Type;
/**
* A node representing a static Java constant.
*
* @author Steve Ebersole
*/
public class JavaConstantNode extends Node implements ExpectedTypeAwareNode, SessionFactoryAwareNode {
private SessionFactoryImplementor factory;
private String constantExpression;
private Object constantValue;
private Type heuristicType;
private Type expectedType;
@Override
public void setText(String s) {
// for some reason the antlr.CommonAST initialization routines force
// this method to get called twice. The first time with an empty string
if ( StringHelper.isNotEmpty( s ) ) {
constantExpression = s;
constantValue = ReflectHelper.getConstantValue( s );
heuristicType = factory.getTypeResolver().heuristicType( constantValue.getClass().getName() );
super.setText( s );
}
}
@Override
public void setExpectedType(Type expectedType) {
this.expectedType = expectedType;
}
@Override
public Type getExpectedType() {
return expectedType;
}
@Override
public void setSessionFactory(SessionFactoryImplementor factory) {
this.factory = factory;
}
@Override
@SuppressWarnings("unchecked")
public String getRenderText(SessionFactoryImplementor sessionFactory) {
final Type type = expectedType == null
? heuristicType
: Number.class.isAssignableFrom( heuristicType.getReturnedClass() )
? heuristicType
: expectedType;
try {
final LiteralType literalType = (LiteralType) type;
final Dialect dialect = factory.getDialect();
return literalType.objectToSQLString( constantValue, dialect );
}
catch (Exception t) {
throw new QueryException( QueryTranslator.ERROR_CANNOT_FORMAT_LITERAL + constantExpression, t );
}
}
}