org.eclipse.viatra2.gtasm.patternmatcher.impl/src/org/eclipse/viatra2/gtasm/patternmatcher/impl/patternmatcher/internal/VariableID.java

/*******************************************************************************
 * Copyright (c) 2004-2008 Akos Horvath, Gergely Varro and Daniel Varro
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Akos Horvath, Gergely Varro - initial API and implementation
 *******************************************************************************/

 package org.eclipse.viatra2.gtasm.patternmatcher.impl.patternmatcher.internal;

import org.eclipse.viatra2.gtasmmodel.gtasm.metamodel.gt.GTPattern;

public class VariableID implements Comparable {
	private GTPattern pattern;
	private Integer uid;
	private String variable;

    public VariableID(GTPattern pattern, int uid, String variable) {
		this.pattern = pattern;
		this.uid = uid;
		this.variable = variable;
	}
	
	public boolean equals(Object id) {
        if (id != null && id instanceof VariableID) {
            VariableID otherID = (VariableID) id;
            return (pattern.getName().equals(otherID.pattern.getName()) &&
                    uid == otherID.uid &&
                    variable.equals(otherID.variable));
        } else {
            return false;
        }
	}
    
	// TODO not a smooth solution
	public int hashCode() { 
		  //return 1;
		  return uid;
		  // return uid+geVariableName().hashCode;
		  
		}

    public int compareTo(Object arg0) {
        VariableID otherID = (VariableID) arg0;
        if(equals(arg0))
            return 0;
        else
            if(uid == otherID.uid)
                return variable.compareTo(otherID.variable);
            else
                return (uid < otherID.uid ? -1 : 1);
    }

	public String toString() {
		return pattern.getName() + "_" + uid.toString() + "_" + variable;
	}
	
	/** Returns the user friendly (readable) representation of the search node's name
	 * @return
	 */
	public String getFancyName() {
		return "'"+variable + " variable of pattern "+pattern.getName()+"'";
	}
}