/*
 ***** BEGIN LICENSE BLOCK *****
 * Version: EPL 2.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Eclipse Public
 * License Version 2.0 (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-v20.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 Jan Arne Petersen <jpetersen@uni-bonn.de>
 * Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
 * Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
 * Copyright (C) 2004 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.ast;

import java.util.List;

import org.jruby.ast.visitor.NodeVisitor;

/** Represents an alias statement (<code>alias newName oldName</code>).
 */
public class AliasNode extends Node {
    private final Node oldName;
    private final Node newName;

    public AliasNode(int line, Node newName, Node oldName) {
        super(line, newName.containsVariableAssignment() || oldName.containsVariableAssignment());
        this.oldName = oldName;
        this.newName = newName;
    }

    public NodeType getNodeType() {
        return NodeType.ALIASNODE;
    }
    
    /**
     * Accept for the visitor pattern.
     * @param iVisitor the visitor
     **/
    public <T> T accept(NodeVisitor<T> iVisitor) {
        return iVisitor.visitAliasNode(this);
    }

    /**
     * Gets the newName.
     * @return the newName as in the alias statement :  <code> alias <b>newName</b> oldName </code>
     */
    public Node getNewName() {
        return newName;
    }

    /**
     * Gets the oldName.
     * @return the oldName as in the alias statement :  <code> alias newName <b>oldName</b></code>
     */
    public Node getOldName() {
        return oldName;
    }
    
    public List<Node> childNodes() {
        return Node.createList(newName, oldName);
    }
}
