/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 * 
 */

package org.apache.jmeter.save;

import java.util.LinkedList;
import java.util.NoSuchElementException;

import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.DefaultConfiguration;
import org.apache.jmeter.testelement.TestElement;
import org.apache.jmeter.testelement.TestElementTraverser;
import org.apache.jmeter.testelement.property.CollectionProperty;
import org.apache.jmeter.testelement.property.JMeterProperty;
import org.apache.jmeter.testelement.property.MapProperty;
import org.apache.jmeter.testelement.property.TestElementProperty;

/**
 * Helper class for OldSaveService
 */
public class TestElementSaver implements TestElementTraverser {
    private String name;

    private LinkedList stack = new LinkedList();

    private DefaultConfiguration rootConfig = null;

	public TestElementSaver(String name) {
		this.name = name;
	}

	public Configuration getConfiguration() {
		return rootConfig;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see TestElementTraverser#startTestElement(TestElement)
	 */
	public void startTestElement(TestElement el) {
		DefaultConfiguration config = new DefaultConfiguration("testelement", "testelement");
		config.setAttribute("class", el.getClass().getName());
		if (rootConfig == null) {
			rootConfig = config;
			if (name != null && name.length() > 0) {
				rootConfig.setAttribute("name", name);
			}
		} else {
			setConfigName(config);
		}
		stack.add(config);
	}

	public void setConfigName(DefaultConfiguration config) {
		if (!(stack.getLast() instanceof Configuration)) {
			Object key = stack.removeLast();
			config.setAttribute("name", key.toString());
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see TestElementTraverser#endTestElement(TestElement)
	 */
	public void endTestElement(TestElement el) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see TestElementTraverser#simplePropertyValue(JMeterProperty)
	 */
	public void simplePropertyValue(JMeterProperty value) {
		try {
			Object parent = stack.getLast();
			if (!(parent instanceof Configuration)) {
				DefaultConfiguration config = new DefaultConfiguration("property", "property");
				config.setValue(value != null ? value.toString() : "");
				config.setAttribute("name", parent.toString());
				config.setAttribute(OldSaveService.XML_SPACE, OldSaveService.PRESERVE);
				stack.removeLast();
				stack.add(config);
			}

			if (parent instanceof DefaultConfiguration && value instanceof Configuration) {
				((DefaultConfiguration) parent).addChild((Configuration) value);
			} else if (parent instanceof DefaultConfiguration && !(value instanceof Configuration)) {
				DefaultConfiguration config = new DefaultConfiguration("string", "string");
				config.setValue(value.toString());
				config.setAttribute(OldSaveService.XML_SPACE, OldSaveService.PRESERVE);
				((DefaultConfiguration) parent).addChild(config);
			}
		} catch (NoSuchElementException e) {
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see TestElementTraverser#startMap(MapProperty)
	 */
	public void startMap(MapProperty map) {
		DefaultConfiguration config = new DefaultConfiguration("map", "map");
		config.setAttribute("class", map.getObjectValue().getClass().getName());
		config.setAttribute("name", map.getName());
		config.setAttribute("propType", map.getClass().getName());
		stack.add(config);
	}

	/*
	 * It appears that this method is no longer used. jeremy_a@bigfoot.com 02
	 * May 2003 public void endMap(MapProperty map) { finishConfig(); }
	 */

	/*
	 * (non-Javadoc)
	 * 
	 * @see TestElementTraverser#startCollection(CollectionProperty)
	 */
	public void startCollection(CollectionProperty col) {
		DefaultConfiguration config = new DefaultConfiguration("collection", "collection");
		config.setAttribute("class", col.getObjectValue().getClass().getName());
		config.setAttribute("name", col.getName());
		config.setAttribute("propType", col.getClass().getName());
		stack.add(config);
	}

	/*
	 * It appears that this method is no longer used. jeremy_a@bigfoot.com 02
	 * May 2003 public void endCollection(CollectionProperty col) {
	 * finishConfig(); }
	 */

	/*
	 * (non-Javadoc)
	 * 
	 * @see TestElementTraverser#endProperty(JMeterProperty)
	 */
	public void endProperty(JMeterProperty key) {
		finishConfig();
	}

	private void finishConfig() {
		if (stack.size() > 1) {
			Configuration config = (Configuration) stack.removeLast();
			((DefaultConfiguration) stack.getLast()).addChild(config);
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see TestElementTraverser#startProperty(JMeterProperty)
	 */
	public void startProperty(JMeterProperty key) {
		if (key instanceof CollectionProperty) {
			startCollection((CollectionProperty) key);
		} else if (key instanceof MapProperty) {
			startMap((MapProperty) key);
		} else if (key instanceof TestElementProperty) {
			stack.addLast(key.getName());
		} else {
			DefaultConfiguration config = new DefaultConfiguration("property", "property");
			config.setValue(key.getStringValue());
			config.setAttribute("name", key.getName());
			config.setAttribute("propType", key.getClass().getName());
			config.setAttribute(OldSaveService.XML_SPACE, OldSaveService.PRESERVE);
			stack.addLast(config);
		}

	}

}
