/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.quercus.statement;
import com.caucho.quercus.Location;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.Value;
import com.caucho.quercus.expr.Expr;
/**
* Represents an if statement.
*/
public class IfStatement extends Statement {
private final Expr _test;
private final Statement _trueBlock;
private final Statement _falseBlock;
public IfStatement(Location location,
Expr test,
Statement trueBlock,
Statement falseBlock)
{
super(location);
_test = test;
_trueBlock = trueBlock;
_falseBlock = falseBlock;
if (_trueBlock != null)
_trueBlock.setParent(this);
if (_falseBlock != null)
_falseBlock.setParent(this);
}
protected Expr getTest()
{
return _test;
}
protected Statement getTrueBlock()
{
return _trueBlock;
}
protected Statement getFalseBlock()
{
return _falseBlock;
}
/**
* Executes the 'if' statement, returning any value.
*/
public Value execute(Env env)
{
if (_test.evalBoolean(env)) {
return _trueBlock.execute(env);
}
else if (_falseBlock != null) {
return _falseBlock.execute(env);
}
else
return null;
}
}