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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 Jan Arne Petersen 
 * Copyright (C) 2002 Benoit Cerrina 
 * Copyright (C) 2002-2004 Anders Bengtsson 
 * Copyright (C) 2004 Thomas E Enebo 
 * 
 * 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.ast;

import org.jruby.Ruby;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.runtime.Block;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;

/** Represents an operator assignment to an element.
 * 
 * This could be for example:
 * 
 *  * a[4] += 5
 * a[3] &&= true
 * 
 */
public class OpElementOneArgOrAsgnNode extends OpElementAsgnNode {
    private Node arg1;
    
    public OpElementOneArgOrAsgnNode(ISourcePosition position, Node receiverNode, String operatorName, ArrayNode args, Node valueNode) {
        super(position, receiverNode, operatorName, args, valueNode);
        
        assert args.size() == 1 : "args.size() is 1";
        
        arg1 = args.get(0);
    }
    
    @Override
    public IRubyObject interpret(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {
        IRubyObject receiver = getReceiverNode().interpret(runtime, context, self, aBlock);
        IRubyObject rArg1 = arg1.interpret(runtime, context, self, aBlock);
        IRubyObject firstValue = elementAdapter.call(context, self, receiver, rArg1);
        
        if (firstValue.isTrue()) return firstValue;

        firstValue = getValueNode().interpret(runtime, context, self, aBlock);

        elementAsgnAdapter.call(context, self, receiver, rArg1, firstValue);
        
        return firstValue;
    }
}