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/**
 * Copyright (C) 2010-2018 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite 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 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite 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 Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see .
 */
/**
 * 
 */
package org.evosuite.testcase.localsearch;

import org.evosuite.Properties;
import org.evosuite.Properties.DSEType;
import org.evosuite.ga.localsearch.LocalSearch;
import org.evosuite.testcase.TestCase;
import org.evosuite.testcase.TestChromosome;
import org.evosuite.testcase.statements.NullStatement;
import org.evosuite.testcase.statements.PrimitiveStatement;
import org.evosuite.testcase.statements.Statement;
import org.evosuite.utils.Randomness;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Applies local search to a given Test Case (a TestChromosome) using a local
 * search objective for test cases.
 * 
 * @author Gordon Fraser
 */
public abstract class TestCaseLocalSearch implements LocalSearch {

	protected static final Logger logger = LoggerFactory.getLogger(TestCaseLocalSearch.class);

	/**
	 * The factory method that returns the type of Local Search that is supposed
	 * to be applied on the Test Case
	 * 
	 * @return
	 */
	public static TestCaseLocalSearch selectTestCaseLocalSearch() {
		final double nextDouble = Randomness.nextDouble();
		boolean useDSE = nextDouble < Properties.DSE_PROBABILITY;
		if (useDSE) {
			return new DSETestCaseLocalSearch();
		} else {
			return new AVMTestCaseLocalSearch();
		}
	}

	/**
	 * This method allows to reset all primitive values before trying again a
	 * local search on the same test case.
	 * 
	 * @param test
	 *            the test case that will have their primitive values changed to
	 *            random primitive values.
	 */
	public static void randomizePrimitives(TestCase test) {
		for (Statement s : test) {
			if (s instanceof PrimitiveStatement) {
				if (s instanceof NullStatement) {
					continue; // ignore NullStatement
				}
				((PrimitiveStatement) s).randomize();
			}
		}
	}

}