/*
* Copyright (c) 1998-2008 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.BreakValue;
import com.caucho.quercus.env.ContinueValue;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.Value;
import com.caucho.quercus.expr.Expr;
/**
* Represents a for statement.
*/
public class ForStatement extends Statement {
protected final Expr _init;
protected final Expr _test;
protected final Expr _incr;
protected final Statement _block;
protected final String _label;
public ForStatement(Location location, Expr init, Expr test, Expr incr,
Statement block, String label)
{
super(location);
_init = init;
_test = test;
_incr = incr;
_block = block;
_label = label;
block.setParent(this);
}
@Override
public boolean isLoop()
{
return true;
}
public Value execute(Env env)
{
try {
if (_init != null)
_init.eval(env);
while (_test == null || _test.evalBoolean(env)) {
env.checkTimeout();
Value value = _block.execute(env);
if (value == null) {
}
else if (value instanceof ContinueValue) {
ContinueValue conValue = (ContinueValue) value;
int target = conValue.getTarget();
if (target > 1) {
return new ContinueValue(target - 1);
}
}
else if (value instanceof BreakValue) {
BreakValue breakValue = (BreakValue) value;
int target = breakValue.getTarget();
if (target > 1)
return new BreakValue(target - 1);
else
break;
}
else
return value;
if (_incr != null)
_incr.eval(env);
}
}
catch (RuntimeException t) {
rethrow(t, RuntimeException.class);
}
return null;
}
}