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/***** 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) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2004-2006 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 java.lang.ref.SoftReference;
import org.jruby.runtime.builtin.IRubyObject;
public final class MetaClass extends RubyClass {
/** rb_class_boot (for MetaClasses) (in makeMetaClass(RubyClass))
*
*/
public MetaClass(Ruby runtime, RubyClass superClass, IRubyObject attached) {
super(runtime, superClass, false);
this.attached = new SoftReference<IRubyObject>(attached);
this.index = superClass.index; // use same ClassIndex as metaclass, since we're technically still of that type
}
@Override
public boolean isSingleton() {
return true;
}
public final IRubyObject allocate(){
throw runtime.newTypeError("can't create instance of virtual class");
}
public IRubyObject getAttached() {
return attached.get();
}
public void setAttached(IRubyObject attached) {
this.attached = new SoftReference<IRubyObject>(attached);
}
private static final SoftReference<IRubyObject> NULL_SOFT_REF = new SoftReference<IRubyObject>(null);
private SoftReference<IRubyObject> attached = NULL_SOFT_REF;
}