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package be.unamur.transitionsystem.test;

/*
 * #%L
 * vibes-core
 * %%
 * Copyright (C) 2014 PReCISE, University of Namur
 * %%
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * #L%
 */

import java.util.ArrayList;

import com.google.common.collect.HashMultiset;

import be.unamur.fts.fexpression.Constant;
import be.unamur.fts.fexpression.FExpression;
import be.unamur.fts.fexpression.util.ConstraintTransformation;
import be.unamur.transitionsystem.Action;
import be.unamur.transitionsystem.State;
import be.unamur.transitionsystem.Transition;
import be.unamur.transitionsystem.fts.FeaturedTransition;
import be.unamur.transitionsystem.test.exception.TestCaseException;


public class FtsMutableTestCase extends MutableTestCase implements FtsTestCase {
	
	public static final TestCaseFactory FACTORY = new TestCaseFactory() {
		@Override
		public TestCase buildTestCase() {
			return new FtsMutableTestCase();
		}
	};
	
	protected FExpression constraint = null;
	protected ArrayList constraints = new ArrayList();
	
	public FtsMutableTestCase() {
		super();
	}
	
	@Override
	public FtsMutableTestCase enqueue(Transition trans)	throws TestCaseException {
		return enqueue(trans.getAction(), ((FeaturedTransition) trans).getFeatureExpression());
	}
	
	@Override
	public FtsMutableTestCase enqueue(Action action)
			throws TestCaseException {
		return enqueue(action, Constant.TRUE);
	}
	
	@Override
	public FtsMutableTestCase enqueue(Action action, FExpression constraint)
			throws TestCaseException {
		if(constraint != null && constraint != Constant.TRUE){
			this.constraint = null;
		}
		constraints.add(constraint);
		return (FtsMutableTestCase) super.enqueue(action);
	}
	
	@Override
	public FtsMutableTestCase dequeue() throws TestCaseException {
		FExpression last = constraints.remove(constraints.size() - 1);
		if(last != null && last != Constant.TRUE){
			this.constraint = null;
		}
		return (FtsMutableTestCase) super.dequeue();
	}
	
	@Override
	public FExpression getProductConstraint(){
		return constraint == null ? constraint = ConstraintTransformation.getConjunction(constraints) : constraint;
	}
	
	@Override
	public boolean equals(Object obj) {
		return super.equals(obj) && getProductConstraint().equals(((FtsMutableTestCase) obj).getProductConstraint());
	}
	
	@Override
	public FtsMutableTestCase copy()
			throws TestCaseException {
		FtsMutableTestCase tc = new FtsMutableTestCase();
		tc.actions = new ArrayList(actions);
		tc.actionSet = HashMultiset.create(actionSet);
		tc.constraint = constraint;
		tc.constraints = new ArrayList(constraints);
		return tc;
	}

}