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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. 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.ext.weakref;
 
 import org.jruby.Ruby;
 import static org.jruby.runtime.Visibility.*;

Author(s):
headius
 
 @JRubyClass(name="WeakRef", parent="Delegator")
 public class WeakRef extends RubyObject {
     private WeakReference<IRubyObjectref;
     
     public static final ObjectAllocator WEAKREF_ALLOCATOR = new ObjectAllocator() {
         public IRubyObject allocate(Ruby runtimeRubyClass klazz) {
             return new WeakRef(runtimeklazz);
         }
     };
     
     @JRubyClass(name="WeakRef::RefError", parent="StandardError")
     public static class RefError {}
 
     public WeakRef(Ruby runtimeRubyClass klazz) {
         super(runtimeklazz);
     }
     
     @JRubyMethod(name = "__getobj__")
     public IRubyObject getobj() {
         IRubyObject obj = .get();
         
         if (obj == null) {
             // FIXME weakref.rb also does caller(2) here for the backtrace
             throw newRefError("Illegal Reference - probably recycled");
         }
         
         return obj;
     }
 
     @JRubyMethod(name = "__setobj__")
     public IRubyObject setobj(IRubyObject obj) {
         return getRuntime().getNil();
     }
     
     @JRubyMethod(name = "new", required = 1, meta = true)
     public static IRubyObject newInstance(IRubyObject clazzIRubyObject arg) {
         WeakRef weakRef = (WeakRef)((RubyClass)clazz).allocate();
         
         weakRef.callInit(new IRubyObject[] {arg}, .);
         
         return weakRef;
     }
 
     // framed for invokeSuper
     @JRubyMethod(frame = true, visibility = )
     public IRubyObject initialize(ThreadContext contextIRubyObject obj) {
          = new WeakReference<IRubyObject>(obj);
         
         return RuntimeHelpers.invokeSuper(contextthisobj.);
     }
     
     @JRubyMethod(name = "weakref_alive?")
     public IRubyObject weakref_alive_p() {
        return .get() != null ? getRuntime().getTrue() : getRuntime().getFalse();
    }
    
    private RaiseException newRefError(String message) {
        Ruby runtime = getRuntime();
        ThreadContext context = runtime.getCurrentContext();
        RubyException exception =
                (RubyException)runtime.getClass("WeakRef").getClass("RefError").newInstance(context,
                new IRubyObject[] {runtime.newString(message)}, .);
        
        RaiseException re = new RaiseException(exception);
        return re;
    }
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