/**
 * Copyright (C) 2001-2017 by RapidMiner and the contributors
 * 
 * Complete list of developers available at our web site:
 * 
 * http://rapidminer.com
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the
 * GNU Affero General Public License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program 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
 * Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with this program.
 * If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.io.process.rules;

import com.rapidminer.io.process.XMLImporter;
import com.rapidminer.operator.Operator;
import com.rapidminer.tools.LogService;
import com.rapidminer.tools.XMLException;

import java.util.logging.Level;

import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;


/**
 * Rule to rename parameters.
 * 
 * @author Simon Fischer
 * 
 */
public class ReplaceParameterRule extends AbstractConditionedParseRule {

	private String oldAttributeName;
	private String newAttributeName;

	public ReplaceParameterRule(String operatorTypeName, Element element) throws XMLException {
		super(operatorTypeName, element);
		NodeList children = element.getChildNodes();
		for (int i = 0; i < children.getLength(); i++) {
			Node child = children.item(i);
			if (child instanceof Element) {
				Element childElem = (Element) child;
				if (childElem.getTagName().equals("oldparameter")) {
					oldAttributeName = childElem.getTextContent();
				} else if (childElem.getTagName().equals("newparameter")) {
					newAttributeName = childElem.getTextContent();
				}
			}
		}
	}

	@Override
	protected String conditionedApply(Operator operator, String operatorTypeName, XMLImporter importer) {
		if (operator.getParameters().isSpecified(oldAttributeName)) {
			operator.getParameters().renameParameter(oldAttributeName, newAttributeName);
			LogService.getRoot().log(Level.INFO, "com.rapidminer.io.process.rules.ReplaceParameterRule.renamed_parameter",
					new Object[] { oldAttributeName, operator.getName(), operatorTypeName, newAttributeName });
		}
		return null;
	}

	@Override
	public String toString() {
		return "Replace " + operatorTypeName + "." + oldAttributeName + " by " + newAttributeName;
	}
}