/***** 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) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
 * Copyright (C) 2001-2002 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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 * 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
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 ***** END LICENSE BLOCK *****/
package org.jruby.ast;

import java.io.IOException;
import java.util.List;
import org.jruby.ast.types.INameNode;
import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.evaluator.Instruction;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.runtime.MethodIndex;

/** 
 * Represents a method call with self as an implicit receiver.
 */
public class FCallNode extends Node implements INameNode, IArgumentNode, BlockAcceptingNode {
    static final long serialVersionUID = 3590332973770104094L;

    private String name;
    public final int index;
    private Node argsNode;
    private Node iterNode;

    public FCallNode(ISourcePosition position, String name, Node argsNode) {
        this(position, name, argsNode, null);
    }
    
    public FCallNode(ISourcePosition position, String name, Node argsNode, Node iterNode) {
        super(position, NodeTypes.FCALLNODE);
        this.name = name.intern();
        setArgsNode(argsNode);
        this.iterNode = iterNode;
        this.index = MethodIndex.getIndex(this.name);
    }
    
    private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {
        in.defaultReadObject();
        
        // deserialized strings are not interned; intern it now
        name = name.intern();
    }

    /**
     * Accept for the visitor pattern.
     * @param iVisitor the visitor
     **/
    public Instruction accept(NodeVisitor iVisitor) {
        return iVisitor.visitFCallNode(this);
    }
    
    /**
     * Get the node that represents a block or a block variable.
     */
    public Node getIterNode() {
        return iterNode;
    }
    
    public void setIterNode(Node iterNode) {
        this.iterNode = iterNode;
    }

    /**
     * Gets the argsNode.
     * @return Returns a Node
     */
    public Node getArgsNode() {
        return argsNode;
    }

    /**
     * Set the argsNode
     * 
     * @param argsNode set the arguments for this node.
     */
    public void setArgsNode(Node argsNode) {
        this.argsNode = argsNode;
        // If we have more than one arg, make sure the array created to contain them is not ObjectSpaced
        if (argsNode instanceof ArrayNode) {
            ((ArrayNode)argsNode).setLightweight(true);
        }
    }

    /**
     * Gets the name.
     * @return Returns a String
     */
    public String getName() {
        return name;
    }
    
    public List childNodes() {
        return createList(argsNode, iterNode);
    }

    public String toString() {
        return "FCallNode: " + getName();
    }
}