/*
* 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.expr;
import com.caucho.quercus.env.ArrayValue;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.NullValue;
import com.caucho.quercus.env.Value;
/**
* Represents a PHP list() = each() assignment expression.
*/
public class ListEachExpr extends Expr {
protected final AbstractVarExpr _keyVar;
protected final AbstractVarExpr _valueVar;
protected final Expr _value;
public ListEachExpr(Expr []varList, EachExpr each)
{
if (varList.length > 0) {
// XXX: need test
_keyVar = (AbstractVarExpr) varList[0];
}
else
_keyVar = null;
if (varList.length > 1) {
// XXX: need test
_valueVar = (AbstractVarExpr) varList[1];
}
else
_valueVar = null;
_value = each.getExpr();
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
public Value eval(Env env)
{
Value value = _value.eval(env);
if (! (value instanceof ArrayValue))
return NullValue.NULL;
ArrayValue array = (ArrayValue) value;
/*
if (! array.hasCurrent())
return BooleanValue.FALSE;
*/
if (_keyVar != null)
_keyVar.evalAssign(env, array.key());
if (_valueVar != null)
_valueVar.evalAssign(env, array.current());
return array.each();
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
public boolean evalBoolean(Env env)
{
Value value = _value.eval(env);
if (! (value instanceof ArrayValue))
return false;
ArrayValue array = (ArrayValue) value;
if (! array.hasCurrent())
return false;
if (_keyVar != null)
_keyVar.evalAssign(env, array.key());
if (_valueVar != null)
_valueVar.evalAssign(env, array.current());
array.next();
return true;
}
}