code: //==============================================================================
  //	
  //	Copyright (c) 2002-
  //	Authors:
  //	* Dave Parker <david.parker@comlab.ox.ac.uk> (University of Oxford, formerly University of Birmingham)
  //	
  //------------------------------------------------------------------------------
  //	
  //	This file is part of PRISM.
  //	
  //	PRISM is free software; you can redistribute it and/or modify
  //	it under the terms of the GNU General Public License as published by
  //	the Free Software Foundation; either version 2 of the License, or
  //	(at your option) any later version.
  //	
  //	PRISM is distributed in the hope that it will be useful,
  //	but WITHOUT ANY WARRANTY; without even the implied warranty of
  //	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  //	GNU General Public License for more details.
  //	
  //	You should have received a copy of the GNU General Public License
  //	along with PRISM; if not, write to the Free Software Foundation,
  //	Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  //	
  //==============================================================================
  
  package parser.ast;
  
  import java.util.ArrayList;
  
  import parser.visitor.*;
  import prism.PrismLangException;
  
  public class RenamedModule extends ASTElement
  {
  	// Rename info
  	private String name;
  	private String baseModule;
  	private ArrayList<String> oldNames;
  	private ArrayList<String> newNames;
  	// AST elements (for positional info)
  	private ExpressionIdent nameASTElement;
  	private ExpressionIdent baseModuleASTElement;
  	private ArrayList<ExpressionIdent> oldNameASTElements;
  	private ArrayList<ExpressionIdent> newNameASTElements;
  	
  	// Constructor
  	
  	public RenamedModule(String n, String b)
  	{
  		name = n;
  		baseModule = b;
  		oldNames = new ArrayList<String>();
  		newNames = new ArrayList<String>();
  		oldNameASTElements = new ArrayList<ExpressionIdent>();
  		newNameASTElements = new ArrayList<ExpressionIdent>();
  	}
  	
  	// Set methods
  	
  	public void setName(String n)
  	{
  		name = n;
  	}
  
  	public void setBaseModule(String b)
  	{
  		baseModule = b;
  	}
  	
  	public void setNameASTElement(ExpressionIdent e)
  	{
  		nameASTElement = e;
  	}
  	
  	public void setBaseModuleASTElement(ExpressionIdent e)
  	{
  		baseModuleASTElement = e;
  	}
  	
  	public void addRename(String s1, String s2)
  	{
  		addRename(s1, s2, null, null);
  	}
  		
  	public void addRename(String s1, String s2, ExpressionIdent e1, ExpressionIdent e2)
  	{
  		oldNames.add(s1);
  		newNames.add(s2);
  		oldNameASTElements.add(e1);
  		newNameASTElements.add(e2);
  	}
  		
  	// Get methods
  	
  	public String getName()
  	{
  		return name;
  	}
  	
  	public String getBaseModule()
  	{
  		return baseModule;
  	}
  
  	public String getNewName(String s)
  	{
  		int i = oldNames.indexOf(s);
  		if (i == -1) {
  			return null;
  		}
  		return newNames.get(i);
  	}
  		
  	public String getOldName(String s)
  	{
  		int i = newNames.indexOf(s);
  		if (i == -1) {
  			return null;
  		}
  		return oldNames.get(i);
  	}
  	
  	public int getNumRenames()
  	{
  		return oldNames.size();
  	}
  	
  	public String getOldName(int i)
  	{
  		return oldNames.get(i); 
  	}
  	
  	public String getNewName(int i)
  	{
  		return newNames.get(i); 
  	}
  	
  	public ExpressionIdent getNameASTElement()
  	{
  		return nameASTElement;
  	}
  	
  	public ExpressionIdent getBaseModuleASTElement()
  	{
  		return baseModuleASTElement;
  	}
  	
  	public ExpressionIdent getOldNameASTElement(int i)
  	{
  		return oldNameASTElements.get(i);
  	}
  	
  	public ExpressionIdent getNewNameASTElement(int i)
  	{
  		return newNameASTElements.get(i);
  	}
  	
  	// Methods required for ASTElement:
  	
  	/**
  	 * Visitor method.
  	 */
  	public Object accept(ASTVisitor v) throws PrismLangException
  	{
  		return v.visit(this);
  	}
  	
  	/**
  	 * Convert to string.
  	 */
  	public String toString()
  	{
  		String s = "";
  		int i;
  		
  		s = s + "module " + name + " = " + baseModule + " [";
  		for (i = 0; i < oldNames.size() - 1; i++) {
  			s = s + oldNames.get(i) + " = " + newNames.get(i) + ", ";
  		}
  		i = oldNames.size() - 1;
  		s = s + oldNames.get(i) + " = " + newNames.get(i) + "] endmodule";
  		
  		return s;
  	}
  	
  	/**
  	 * Perform a deep copy.
  	 */
  	public ASTElement deepCopy()
  	{
  		int i, n;
  		RenamedModule ret = new RenamedModule(name, baseModule);
  		ret.setNameASTElement((ExpressionIdent)nameASTElement.deepCopy());
  		ret.setBaseModuleASTElement((ExpressionIdent)baseModuleASTElement.deepCopy());
  		n = oldNames.size();
  		for (i = 0; i < n; i++) {
  			ret.addRename(oldNames.get(i), newNames.get(i));
  		}
  		ret.setPosition(this);
  		return ret;
  	}
  }
  
  //------------------------------------------------------------------------------
  