Package org.jruby

Source Code of org.jruby.TopSelfFactory

/***** 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 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2004 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
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby;

import org.jruby.runtime.Arity;
import org.jruby.runtime.Block;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.runtime.callback.Callback;

/**
*
* @author jpetersen
*/
public final class TopSelfFactory {

    /**
     * Constructor for TopSelfFactory.
     */
    private TopSelfFactory() {
        super();
    }
   
    public static IRubyObject createTopSelf(final Ruby runtime) {
        IRubyObject topSelf = new RubyObject(runtime, runtime.getObject());
       
        topSelf.getSingletonClass().defineFastMethod("to_s", new Callback() {
            /**
             * @see org.jruby.runtime.callback.Callback#execute(IRubyObject, IRubyObject[])
             */
            public IRubyObject execute(IRubyObject recv, IRubyObject[] args, Block block) {
                return runtime.newString("main");
            }

            /**
             * @see org.jruby.runtime.callback.Callback#getArity()
             */
            public Arity getArity() {
                return Arity.noArguments();
            }
        });
       
        // The following three methods must be defined fast, since they expect to modify the current frame
        // (i.e. they expect no frame will be allocated for them). JRUBY-1185.
        topSelf.getSingletonClass().defineFastPrivateMethod("include", new Callback() {
            /**
             * @see org.jruby.runtime.callback.Callback#execute(IRubyObject, IRubyObject[])
             */
            public IRubyObject execute(IRubyObject recv, IRubyObject[] args, Block block) {
                runtime.secure(4);
                return runtime.getObject().include(args);
            }

            /**
             * @see org.jruby.runtime.callback.Callback#getArity()
             */
            public Arity getArity() {
                return Arity.optional();
            }
        });
       
        topSelf.getSingletonClass().defineFastPrivateMethod("public", new Callback() {
            /**
             * @see org.jruby.runtime.callback.Callback#execute(IRubyObject, IRubyObject[])
             */
            public IRubyObject execute(IRubyObject recv, IRubyObject[] args, Block unusedBlock) {
                return runtime.getObject().rbPublic(recv.getRuntime().getCurrentContext(), args);
            }

            /**
             * @see org.jruby.runtime.callback.Callback#getArity()
             */
            public Arity getArity() {
                return Arity.optional();
            }
        });
       
        topSelf.getSingletonClass().defineFastPrivateMethod("private", new Callback() {
            /**
             * @see org.jruby.runtime.callback.Callback#execute(IRubyObject, IRubyObject[])
             */
            public IRubyObject execute(IRubyObject recv, IRubyObject[] args, Block unusedBlock) {
                return runtime.getObject().rbPrivate(recv.getRuntime().getCurrentContext(), args);
            }

            /**
             * @see org.jruby.runtime.callback.Callback#getArity()
             */
            public Arity getArity() {
                return Arity.optional();
            }
        });
       
        return topSelf;
    }
}
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