/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

package com.nokia.s60tools.memspy.model;

import java.io.BufferedReader;

import java.util.ArrayList;

/**

 * class AnalyserXMLParser.

 * class that parses symbol and thread name information from debug configuration file.

 *

 */

public class AnalyserXMLParser {

	static final String DEBUG_META_DATA_START_TAG 	= "<category name=\"debug_meta_data\">";

	static final String DEBUG_META_DATA_END_TAG 	= "</category>";

	static final String THREAD_TAG 					= "<command name=\"thread\">";

	static final String FILE_NAME 					= "file name";

	static final String DIRECTORY_NAME				= "directory name";

	/**

	 * Add wanted lines from given input to XML generator and returns the generator.

	 * @param reader

	 * @return XML generator

	 */

	public static AnalyserXMLGenerator parseXML( BufferedReader reader ){

		AnalyserXMLGenerator retVal = new AnalyserXMLGenerator();

		boolean readingDebugMetaData = false;

		ArrayList<String> debugMetaDataFiles = new ArrayList<String>();

		String debugMetaDataDirectory = null;

		String threadName = "";

		try{

			String line = "";

			// Go thru file in loop and search for lines that contain debugMetaData -text. 

			// If text is found, save meta data file information into AnalyserXMLGenerator-object.

			while( reader.ready() ){

				line = reader.readLine();

				if( line == null){

					break;

				}

				// Search for debug meta data start and end tags.

				if( line.contains(DEBUG_META_DATA_START_TAG) ){

					readingDebugMetaData = true;

				}

				else if( line.contains(DEBUG_META_DATA_END_TAG) ){

					readingDebugMetaData = false;

				}

				// if between debug meta data start and end tags, search for debug meta data info.

				if( readingDebugMetaData ){

					if(line.contains(FILE_NAME)){

						debugMetaDataFiles.add( getMetaDataInfo(line) );

					}

					if(line.contains(DIRECTORY_NAME)){

						debugMetaDataDirectory = getMetaDataInfo(line);

					}

				}

				// search for thread name tag.

				if( line.contains(THREAD_TAG) ){

					threadName = getThreadName(line);

				}

			}

		}

		catch (Exception e){

			e.printStackTrace();

			return null; 		

		}

		if(threadName.equals("") ){

			return null;

		}

		// check that thread name and at least one symbol file was found.

		if( debugMetaDataFiles.size() != 0 ){

			// set found data into AnalyserXMLGenerator-object.

			retVal.setXMLDebugMetaDataFile(debugMetaDataFiles.toArray(new String [debugMetaDataFiles.size()]));			

		}

		if( !threadName.equals("")){

			retVal.setXMLDebugMetaDataDirectory(debugMetaDataDirectory);

		}

		retVal.setXMLThreadName(threadName);

		return retVal;

	}

	/**

	 * getMetaDataInfo.

	 * @param line String that is parsed

	 * @return string between quotation marks

	 */

	private static String getMetaDataInfo( String line ) {

		int firstIndex = line.indexOf("\"") + 1 ;

		int secondIndex = line.indexOf(("\""), firstIndex );

		return line.substring(firstIndex, secondIndex);

	}

	/**

	 * getThreadName.

	 * @param line String that is parsed

	 * @return string between threas tags

	 */

	private static String getThreadName(String line){

		int firstIndex = line.indexOf("=\"thread\">") + 10;

		int secondIndex = line.indexOf("</command>"); 

		return line.substring(firstIndex, secondIndex);

	}

}