TopSelfFactory.java

/***** BEGIN LICENSE BLOCK *****
 * Version: EPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Eclipse 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/epl-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
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package org.jruby;

import org.jruby.internal.runtime.methods.JavaMethod;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.Visibility;
import org.jruby.runtime.builtin.IRubyObject;

/**
 * 
 * @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().addMethod("to_s", new JavaMethod.JavaMethodZero(topSelf.getSingletonClass(), Visibility.PUBLIC) {
            @Override
            public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name) {
                return runtime.newString("main");
            }
        });
        topSelf.getSingletonClass().defineAlias("inspect", "to_s");
        
        // 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().addMethod("include", new JavaMethod.JavaMethodN(topSelf.getSingletonClass(), Visibility.PRIVATE) {
            @Override
            public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject[] args) {
                return context.runtime.getObject().include(args);
            }
        });
        
        topSelf.getSingletonClass().addMethod("public", new JavaMethod.JavaMethodN(topSelf.getSingletonClass(), Visibility.PRIVATE) {
            @Override
            public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject[] args) {
                return context.runtime.getObject().rbPublic(context, args);
            }
        });
        
        topSelf.getSingletonClass().addMethod("private", new JavaMethod.JavaMethodN(topSelf.getSingletonClass(), Visibility.PRIVATE) {
            @Override
            public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject[] args) {
                return context.runtime.getObject().rbPrivate(context, args);
            }
        });
        
        return topSelf;
    }
}