/*
* Copyright (c) 1998-2010 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.env;
import com.caucho.quercus.program.Arg;
import com.caucho.quercus.program.Function;
/**
* Represents a call to a function.
*/
public class Closure extends Callback {
private static final Value []NULL_ARGS = new Value[0];
private static final StringValue INVOKE = MethodIntern.intern("__invoke");
private Function _fun;
private Value []_args;
public Closure(Env env, Function fun)
{
_fun = fun;
Arg []args = fun.getClosureUseArgs();
if (args != null && args.length > 0) {
_args = new Value[args.length];
for (int i = 0; i < args.length; i++) {
Arg arg = args[i];
if (arg.isReference())
_args[i] = env.getRef(arg.getName());
else
_args[i] = env.getValue(arg.getName());
}
}
}
public boolean isCallable(Env env, boolean isSyntax)
{
return true;
}
@Override
public Callable toCallable(Env env)
{
return this;
}
@Override
public boolean isObject()
{
return true;
}
@Override
public String getType()
{
return "object";
}
@Override
public Value call(Env env, Value []args)
{
return _fun.callImpl(env, args, false, _fun.getClosureUseArgs(), _args);
}
@Override
public String getCallbackName()
{
return _fun.getName();
}
@Override
public boolean isInternal(Env env)
{
return false;
}
@Override
public boolean isValid(Env env)
{
return true;
}
//
// special methods
//
@Override
public Value callMethod(Env env,
StringValue methodName, int hash,
Value []args)
{
if (methodName == INVOKE || INVOKE.equals(methodName))
return call(env, args);
else
return super.callMethod(env, methodName, hash, args);
}
public String toString()
{
return "Closure[" + _fun.getName() + "]";
}
}