package org.hibernate.hql.ast.tree;
import org.hibernate.type.Type;
import org.hibernate.type.TypeFactory;
import org.hibernate.type.LiteralType;
import org.hibernate.util.ReflectHelper;
import org.hibernate.util.StringHelper;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.dialect.Dialect;
import org.hibernate.QueryException;
import org.hibernate.hql.QueryTranslator;
/**
* 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;
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 = TypeFactory.heuristicType( constantValue.getClass().getName() );
super.setText( s );
}
}
public void setExpectedType(Type expectedType) {
this.expectedType = expectedType;
}
public Type getExpectedType() {
return expectedType;
}
public void setSessionFactory(SessionFactoryImplementor factory) {
this.factory = factory;
}
private String resolveToLiteralString(Type type) {
try {
LiteralType literalType = ( LiteralType ) type;
Dialect dialect = factory.getDialect();
return literalType.objectToSQLString( constantValue, dialect );
}
catch ( Throwable t ) {
throw new QueryException( QueryTranslator.ERROR_CANNOT_FORMAT_LITERAL + constantExpression, t );
}
}
public String getRenderText(SessionFactoryImplementor sessionFactory) {
Type type = expectedType == null ? heuristicType : expectedType;
return resolveToLiteralString( type );
}
}