/***************************************************************************
* Copyright (C) 2012 by Fabrizio Montesi <famontesi@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* 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 General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
* For details about the authors of this software, see the AUTHORS file. *
***************************************************************************/
package jolie.runtime.expression;
import jolie.process.TransformationReason;
import jolie.runtime.Value;
import jolie.runtime.typing.Type;
import jolie.runtime.typing.TypeCheckingException;
/**
* Implements the instanceof operator.
* @author Fabrizio Montesi
*/
public class InstanceOfExpression implements Expression
{
private final Expression expression;
private final Type type;
public InstanceOfExpression( Expression expression, Type type )
{
this.expression = expression;
this.type = type;
}
public Expression cloneExpression( TransformationReason reason )
{
return new InstanceOfExpression( expression, type );
}
public Value evaluate()
{
boolean ret = true;
try {
type.check( expression.evaluate() );
} catch( TypeCheckingException e ) {
ret = false;
}
return Value.create( ret );
}
}