/* Soot - a J*va Optimization Framework
 * Copyright (C) 2004 Jennifer Lhotak
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

package soot.javaToJimple;
import java.util.*;

import polyglot.ast.Node;
import polyglot.util.IdentityKey;

public class LocalUsesChecker extends polyglot.visit.NodeVisitor{

    private final ArrayList<IdentityKey> locals;
    private final ArrayList<IdentityKey> localDecls;
    private final ArrayList<Node> news;
    
    public ArrayList<IdentityKey> getLocals() {
        return locals;
    }

    public ArrayList<Node> getNews(){
        return news;
    }

    public ArrayList<IdentityKey> getLocalDecls(){
        return localDecls;
    }
    
    public LocalUsesChecker(){
        locals = new ArrayList<IdentityKey>();
        localDecls = new ArrayList<IdentityKey>();
        news = new ArrayList<Node>();
    }

    public polyglot.ast.Node leave(polyglot.ast.Node old, polyglot.ast.Node n, polyglot.visit.NodeVisitor visitor) {
    
        if (n instanceof polyglot.ast.Local){
            if (!(locals.contains(new polyglot.util.IdentityKey(((polyglot.ast.Local)n).localInstance())))){
                if (!((polyglot.ast.Local)n).isConstant()){
                    locals.add(new polyglot.util.IdentityKey(((polyglot.ast.Local)n).localInstance()));
                }
            }
        }

        if (n instanceof polyglot.ast.LocalDecl){
            localDecls.add(new polyglot.util.IdentityKey(((polyglot.ast.LocalDecl)n).localInstance()));
        }
        
        if (n instanceof polyglot.ast.Formal){
            localDecls.add(new polyglot.util.IdentityKey(((polyglot.ast.Formal)n).localInstance()));
        }
        
        if (n instanceof polyglot.ast.New){
            news.add(n);
        }
        return n;
    }
}