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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) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de> Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org> 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 EPL, 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 EPL, the GPL or the LGPL. END LICENSE BLOCK ***
 
 package org.jruby.internal.runtime.methods;
 
This class represents a singleton type of method used as a marker for missing or "undef'ed" methods. Only one instance is ever created, and it can't be invoked.
 
 public class UndefinedMethod extends DynamicMethod {
     public static final UndefinedMethod INSTANCE = new UndefinedMethod();

    
Constructor for the one UndefinedMethod instance.
 
     private UndefinedMethod() {
     }

    
The one implementation of call, which throws an exception because UndefinedMethod can't be invoked.

See also:
DynamicMethod.call
 
     public IRubyObject call(ThreadContext contextIRubyObject selfRubyModule klazzString nameIRubyObject[] argsBlock block) {
         throw new UnsupportedOperationException("BUG: invoking UndefinedMethod.call; report at http://bugs.jruby.org");
     }
    
    
A dummy implementation of dup that just returns the singleton instance.

Returns:
The singleton instance
 
     public DynamicMethod dup() {
         return ;
     }

    
Retrieve the singleton instance.

Returns:
The singleton instance
 
     public static UndefinedMethod getInstance() {
         return ;
     }

    
Dummy override of setImplementationClass that does nothing.

Parameters:
implClass Ignored
 
     @Override
     public void setImplementationClass(RubyModule implClass) {
         // UndefinedMethod should be immutable
     }

    
Dummy implementation of setVisibility that does nothing.

Parameters:
visibility Ignored
 
     @Override
     public void setVisibility(Visibility visibility) {
         // UndefinedMethod should be immutable
     }

    
Dummy implementation of setCallConfig that does nothing.

Parameters:
callConfig Ignored
    @Override
    public void setCallConfig(CallConfiguration callConfig) {
        // UndefinedMethod should be immutable
    }
    
    
UndefinedMethod is always visible because it's only used as a marker for missing or undef'ed methods.

Parameters:
caller The calling object
callType The type of call
Returns:
true always
    @Override
    public boolean isCallableFrom(IRubyObject callerCallType callType) {
        return true;
    }
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