code: //==============================================================================
  //	
  //	Copyright (c) 2002-
  //	Authors:
  //	* Dave Parker <david.parker@comlab.ox.ac.uk> (University of Oxford)
  //	
  //------------------------------------------------------------------------------
  //	
  //	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.visitor;
  
  import parser.ast.*;
  import prism.PrismLangException;
  
  /**
   * Find all references to properties (by name), replace the ExpressionLabels with ExpressionProp objects.
   */
  public class FindAllPropRefs extends ASTTraverseModify
  {
  	private ModulesFile mf;
  	private PropertiesFile pf;
  	
  	public FindAllPropRefs(ModulesFile mf, PropertiesFile pf)
  	{
  		this.mf = mf;
  		this.pf = pf;
  	}
  	
  	public Object visit(ExpressionLabel e) throws PrismLangException
  	{
  		String name;
  		Property prop = null;
  		// See if identifier corresponds to a property
  		name = e.getName();
  		if (mf != null) {
  			prop = mf.getPropertyByName(name);
  		}
  		if (prop == null && pf != null) {
  			prop = pf.getPropertyObjectByName(name);
  		}
  		if (prop != null) {
  			// If so, replace it with an ExpressionProp object
  			ExpressionProp expr = new ExpressionProp(e.getName());
  			expr.setPosition(e);
  			return expr;
  		}
  		// Otherwise, leave it unchanged
  		return e;
  	}
  }
  
  