| /***** 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 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 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 java.io.IOException; |
| import java.util.List; |
| |
| import org.jruby.ast.visitor.NodeVisitor; |
| import org.jruby.evaluator.Instruction; |
| import org.jruby.lexer.yacc.ISourcePosition; |
| |
| /** An AliasNode represents an alias statement. |
| * ast node for the |
| * <code>alias newName oldName</code> |
| * @author jpetersen |
| */ |
| public class AliasNode extends Node { |
| static final long serialVersionUID = -498707070925086399L; |
| |
| private String oldName; |
| private String newName; |
| |
| public AliasNode(ISourcePosition position, String newName, String oldName) { |
| super(position, NodeTypes.ALIASNODE); |
| this.oldName = oldName.intern(); |
| this.newName = newName.intern(); |
| } |
| |
| private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException { |
| in.defaultReadObject(); |
| |
| // deserialized strings are not interned; intern it now |
| oldName = oldName.intern(); |
| newName = newName.intern(); |
| } |
| |
| /** |
| * Accept for the visitor pattern. |
| * @param iVisitor the visitor |
| **/ |
| public Instruction accept(NodeVisitor iVisitor) { |
| return iVisitor.visitAliasNode(this); |
| } |
| |
| /** |
| * Gets the newName. |
| * @return the newName as in the alias statement : <code> alias <b>newName</b> oldName </code> |
| */ |
| public String getNewName() { |
| return newName; |
| } |
| |
| /** |
| * Gets the oldName. |
| * @return the oldName as in the alias statement : <code> alias newName <b>oldName</b></code> |
| */ |
| public String getOldName() { |
| return oldName; |
| } |
| |
| public List childNodes() { |
| return EMPTY_LIST; |
| } |
| |
| } |