/*
* 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 Sam
*/
package com.caucho.quercus.lib.spl;
import com.caucho.quercus.env.*;
/**
* A delegate that intercepts array access methods on the
* target objects that implement
* the {@link com.caucho.quercus.lib.spl.ArrayAccess} interface.
*/
public class ArrayAccessDelegate implements ArrayDelegate
{
private static final StringValue OFFSET_GET
= new ConstStringValue("offsetGet");
private static final StringValue OFFSET_SET
= new ConstStringValue("offsetSet");
private static final StringValue OFFSET_UNSET
= new ConstStringValue("offsetUnset");
private static final StringValue OFFSET_EXISTS
= new ConstStringValue("offsetExists");
public Value get(ObjectValue qThis, Value index)
{
Env env = Env.getInstance();
return qThis.callMethod(env, OFFSET_GET, index);
}
public Value put(ObjectValue qThis, Value index, Value value)
{
Env env = Env.getInstance();
return qThis.callMethod(env, OFFSET_SET, index, value);
}
public Value put(ObjectValue qThis, Value index)
{
Env env = Env.getInstance();
return qThis.callMethod(env, OFFSET_SET, UnsetValue.UNSET, index);
}
public boolean isset(ObjectValue qThis, Value index)
{
Env env = Env.getInstance();
Value returnValue = qThis.getQuercusClass().issetField(env,qThis,index.toString(env));
if (returnValue == UnsetValue.UNSET) {
return qThis.callMethod(env, OFFSET_EXISTS, index).toBoolean();
}
else
return returnValue.toBoolean();
}
public Value unset(ObjectValue qThis, Value index)
{
Env env = Env.getInstance();
return qThis.callMethod(env, OFFSET_UNSET, index);
}
@Override
public long count(ObjectValue qThis)
{
return 1;
}
}