/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
 * 
 * ludovic.apvrille AT enst.fr
 * 
 * This software is a computer program whose purpose is to allow the
 * edition of TURTLE analysis, design and deployment diagrams, to
 * allow the generation of RT-LOTOS or Java code from this diagram,
 * and at last to allow the analysis of formal validation traces
 * obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
 * from INRIA Rhone-Alpes.
 * 
 * This software is governed by the CeCILL  license under French law and
 * abiding by the rules of distribution of free software.  You can  use,
 * modify and/ or redistribute the software under the terms of the CeCILL
 * license as circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info".
 * 
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability.
 * 
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or
 * data to be ensured and,  more generally, to use and operate it in the
 * same conditions as regards security.
 * 
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL license and that you accept its terms.
 */



 
package ui;

import myutil.GenericTree;
import myutil.TraceManager;

import java.util.LinkedList;


/**
 * Class Invariant implements GenericTree
 * Invariant computed from Avatar diagrams
 * Creation: 15/02/2012
 * @version 1.0 15/02/2012
 * @author Ludovic APVRILLE
 * @see TGComponent
 */
public class Invariant implements GenericTree {

	private String name;
	private int tokenValue; // Invariant on a given nb of tokens;
	private int value; // value on the incidence matrix after computation of the invariant
	private LinkedList<TGComponent> components;
	private LinkedList<InvariantSynchro> synchros;
	
	public Invariant(String _name) {
		name = _name;
		components = new LinkedList<TGComponent>();
		synchros = new LinkedList<InvariantSynchro>();
	}
	
	public void setTokenValue(int _value) {
		tokenValue = _value;
	}
	
	
	public void setValue(int _value) {
		value = _value;
	}
	
	public String getName() {
		return name;
	}
	
	public int getTokenValue() {
		return tokenValue;
	}
	
	public int getValue() {
		return value;
	}
	
	public LinkedList<TGComponent> getComponents() {
		return components;
	}
	
	public void addSynchro(InvariantSynchro _synchro) {
		// Look for similar synchro
		for(InvariantSynchro is: synchros) {
			if ((is.getFrom() == _synchro.getFrom()) &&  (is.getTo() == _synchro.getTo())) {
				return;
			}
		}
		
		synchros.add(_synchro);
	}
	
	public void addComponent(TGComponent _tgc) {
		if (_tgc == null) {
			TraceManager.addDev("NULL Component added to invariant -> IGNORING");
			return;
		}
		
		//Component already belongs to invariant?
		
		if (components.contains(_tgc)) {
			//TraceManager.addDev("Duplicated component:" + _tgc);
			return;
			
		}
		
		components.add(_tgc);
	}
	
	public void computeValue() {
		value = components.size() + synchros.size();
	}
	
    
	public String toString() {
        return "(" + value + ") " + name;
    }
    
    public int getChildCount() {
        return 2 + synchros.size() + components.size();
    }
    
    public Object getChild(int index) {
    	if (index == 0) {
    		return "Nb of elements: " + value;
    	}
    	
    	if (index == 1) {
    		return "Token value: " + tokenValue;
    	}
    	
    	
    	if (index-2 < synchros.size()) {
    		return synchros.get(index-2);
    	}
    	
    	index -= synchros.size();
    	
    	TGComponent tgc  = components.get(index-2);
    	//TraceManager.addDev("Getting at index #" + (index-2) + " = " + tgc);
    	
    	
    	return components.get(index-2);
    	
    }
    
    public int getIndexOfChild(Object child) {
    	if (child instanceof String) {
    		String s = (String)child;
    		if (s.startsWith("value")) {
    			return 0;
    		}
    		return 1;
    	}
    	
    	if (child instanceof InvariantSynchro) {
    		return synchros.indexOf(child)+2;
    	}
    	
    	return components.indexOf(child)+2+synchros.size();
    }
    
    public boolean containsComponent(TGComponent tgc) {
    	for(InvariantSynchro is: synchros) {
    		if (is.containsComponent(tgc)) {
    			return true;
    		}
    	}
    	return components.contains(tgc);
    }
    
}