/*
 * Encog(tm) Core v3.4 - Java Version
 * http://www.heatonresearch.com/encog/
 * https://github.com/encog/encog-java-core
 
 * Copyright 2008-2016 Heaton Research, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *   
 * For more information on Heaton Research copyrights, licenses 
 * and trademarks visit:
 * http://www.heatonresearch.com/copyright
 */
package org.encog.ml.ea.rules;

import java.util.ArrayList;
import java.util.List;

import org.encog.ml.ea.genome.Genome;

/**
 * Basic implementation of a rule holder.
 */
public class BasicRuleHolder implements RuleHolder {
	/**
	 * Rewrite rules that can simplify genomes.
	 */
	private final List rewriteRules = new ArrayList();
	
	/**
	 * Rewrite rules that can simplify genomes.
	 */
	private final List constraintRules = new ArrayList();

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void addRewriteRule(final RewriteRule rule) {
		this.rewriteRules.add(rule);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void rewrite(final Genome prg) {

		boolean done = false;

		while (!done) {
			done = true;

			for (final RewriteRule rule : this.rewriteRules) {
				if (rule.rewrite(prg)) {
					done = false;
				}
			}
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void addConstraintRule(ConstraintRule rule) {
		this.constraintRules.add(rule);
		
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean isValid(Genome genome) {
		for(ConstraintRule rule: this.constraintRules) {
			if(!rule.isValid(genome)) {
				return false;
			}
		}
		return true;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public List getConstraintRules() {
		return this.constraintRules;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public List getRewriteRules() {
		// TODO Auto-generated method stub
		return null;
	}
	
}