/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
 * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
 * Copyright (C) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
 * Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org>
 * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
 * 
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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package org.jruby.internal.runtime.methods;

import org.jruby.Ruby;
import org.jruby.RubyBinding;
import org.jruby.RubyModule;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.runtime.Arity;
import org.jruby.runtime.Block;
import org.jruby.runtime.EventHook;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.Visibility;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.runtime.callback.Callback;

/**
 */
public class SimpleCallbackMethod extends DynamicMethod {
    private Callback callback;

    public SimpleCallbackMethod(RubyModule implementationClass, Callback callback, Visibility visibility) {
        super(implementationClass, visibility);
        this.callback = callback;
    }

    public void preMethod(ThreadContext context, RubyModule klazz, IRubyObject self, String name, IRubyObject[] args, boolean noSuper, Block block) {
    }
    
    public void postMethod(ThreadContext context) {
    }

    public IRubyObject internalCall(ThreadContext context, RubyModule klazz, IRubyObject self, String name, IRubyObject[] args, boolean noSuper, Block block) {
        assert false;
        return null;
    }

    public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule klazz, String name, IRubyObject[] args, boolean noSuper, Block block) {
    	assert args != null;
        Ruby runtime = context.getRuntime();
        
        if (runtime.hasEventHooks()) {
            ISourcePosition position = context.getPosition();
            
            runtime.callEventHooks(context, EventHook.RUBY_EVENT_C_CALL, position.getFile(), position.getStartLine(), name, getImplementationClass());
            try {
                return callback.execute(self, args, Block.NULL_BLOCK);
            } finally {
                runtime.callEventHooks(context, EventHook.RUBY_EVENT_C_RETURN, position.getFile(), position.getStartLine(), name, getImplementationClass());
            }
        }
        return callback.execute(self, args, Block.NULL_BLOCK);
    }

    public Callback getCallback() {
        return callback;
    }

    public Arity getArity() {
        return getCallback().getArity();
    }
    
    public DynamicMethod dup() {
        return new SimpleCallbackMethod(getImplementationClass(), callback, getVisibility());
    }
}
