/*
 * 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 org.apache.jmeter.save.converters.ConversionHelp;
import org.apache.jorphan.collections.HashTree;

import com.thoughtworks.xstream.mapper.Mapper;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;

/**
 * @author mstover
 * 
 */
public class ScriptWrapperConverter implements Converter {
    
	private static final String ATT_PROPERTIES = "properties"; // $NON-NLS-1$
    private static final String ATT_VERSION = "version"; // $NON-NLS-1$

    /**
	 * Returns the converter version; used to check for possible
	 * incompatibilities
	 */
	public static String getVersion() {
		return "$Revision$"; // $NON-NLS-1$
	}

	Mapper classMapper;

	public ScriptWrapperConverter(Mapper classMapper) {
		this.classMapper = classMapper;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.thoughtworks.xstream.converters.Converter#canConvert(java.lang.Class)
	 */
	public boolean canConvert(Class arg0) {
		return arg0.equals(ScriptWrapper.class);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.thoughtworks.xstream.converters.Converter#marshal(java.lang.Object,
	 *      com.thoughtworks.xstream.io.HierarchicalStreamWriter,
	 *      com.thoughtworks.xstream.converters.MarshallingContext)
	 */
	public void marshal(Object arg0, HierarchicalStreamWriter writer, MarshallingContext context) {
		ScriptWrapper wrap = (ScriptWrapper) arg0;
		String version = SaveService.getVERSION();
        ConversionHelp.setOutVersion(version);// Ensure output follows version
		writer.addAttribute(ATT_VERSION, version);
		writer.addAttribute(ATT_PROPERTIES, SaveService.getPropertiesVersion());
		writer.startNode(classMapper.serializedClass(wrap.testPlan.getClass()));
		context.convertAnother(wrap.testPlan);
		writer.endNode();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.thoughtworks.xstream.converters.Converter#unmarshal(com.thoughtworks.xstream.io.HierarchicalStreamReader,
	 *      com.thoughtworks.xstream.converters.UnmarshallingContext)
	 */
	public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
		ScriptWrapper wrap = new ScriptWrapper();
		wrap.version = reader.getAttribute(ATT_VERSION);
		ConversionHelp.setInVersion(wrap.version);// Make sure decoding
													// follows input file
		reader.moveDown();
		wrap.testPlan = (HashTree) context.convertAnother(wrap, getNextType(reader));
		return wrap;
	}

	protected Class getNextType(HierarchicalStreamReader reader) {
		String classAttribute = reader.getAttribute(ConversionHelp.ATT_CLASS);
		Class type;
		if (classAttribute == null) {
			type = classMapper.realClass(reader.getNodeName());
		} else {
			type = classMapper.realClass(classAttribute);
		}
		return type;
	}
}

@@ -980,24 +980,88 @@
 per.Mapper;%0A
+import com.thoughtworks.xstream.converters.ConversionException;%0A
 import com.t
@@ -1364,23 +1364,50 @@
 %0A * 
-@author mstover
+Handles XStream conversion of Test Scripts
 %0A * 
@@ -3413,102 +3413,1019 @@
 ;%0A%09%09
-wrap.testPlan = (HashTree) context.convertAnother(wrap, getNextType(reader));%0A%09%09return wrap;%0A%09
+// Catch errors and rethrow as ConversionException so we get location details%0A%09%09try %7B%0A            wrap.testPlan = (HashTree) context.convertAnother(wrap, getNextType(reader));%0A        %7D catch (NoClassDefFoundError e) %7B%0A            throw createConversionException(e);%0A        %7D catch (Exception e) %7B%0A            throw createConversionException(e);%0A        %7D%0A%09%09return wrap;%0A%09%7D%0A%0A    private ConversionException createConversionException(Throwable e) %7B%0A        final ConversionException conversionException = new ConversionException(e);%0A        StackTraceElement%5B%5D ste = e.getStackTrace();%0A        if (ste!=null)%7B%0A            for(int i=0; i%3Cste.length; i++)%7B%0A                StackTraceElement top=ste%5Bi%5D;%0A                String className=top.getClassName();%0A                if (className.startsWith(%22org.apache.jmeter.%22))%7B%0A                    conversionException.add(%22first-jmeter-class%22, top.toString());%0A                    break;%0A                %7D%0A            %7D%0A        %7D%0A        return conversionException;%0A    
 %7D%0A%0A%09

Use ConversionException to show location of any errors loading the test plan