1 /*

     2  * Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies). 

     3  * All rights reserved.

     4  * This component and the accompanying materials are made available

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

     6  * which accompanies this distribution, and is available

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

     8  *

     9  * Initial Contributors:

    10  * Nokia Corporation - initial contribution.

    11  *

    12  * Contributors:

    13  *

    14  * Description:

    15  *

    16  * OST Data Matcher Checker

    17  *

    18  */

    19 package com.nokia.traceviewer.ost;

    20 

    21 import java.io.FileInputStream;

    22 import java.io.IOException;

    23 

    24 import com.nokia.traceviewer.engine.TraceViewerConst;

    25 

    26 /**

    27  * OST Data Matcher Checker

    28  * 

    29  */

    30 public class OstDataMatcherChecker implements OstConsts, TraceViewerConst {

    31 

    32 	/**

    33 	 * Checks if file format seems to match

    34 	 * 

    35 	 * @param filePath

    36 	 *            file path

    37 	 * @return true if file format seems to match, false if not

    38 	 */

    39 	boolean checkIfFileFormatMatches(String filePath) {

    40 		boolean matches = false;

    41 		FileInputStream is = null;

    42 		try {

    43 			is = new FileInputStream(filePath);

    44 			if (is.available() > 0) {

    45 				byte[] arr = new byte[OST_V05_PROTOCOLID_OFFSET + 1];

    46 				is.read(arr);

    47 				int versionNumber = 0;

    48 				int msgId = 0;

    49 

    50 				// Get version number and message ID

    51 				versionNumber |= arr[OST_VERSION_OFFSET] & BYTE_MASK;

    52 

    53 				// Version must be 0.0, 0.1, 0.5 or 1.0

    54 				if (versionNumber == OST_V00 || versionNumber == OST_V01) {

    55 					msgId |= arr[OST_V01_PROTOCOLID_OFFSET] & BYTE_MASK;

    56 				} else if (versionNumber == OST_V05 || versionNumber == OST_V10) {

    57 					msgId |= arr[OST_V05_PROTOCOLID_OFFSET] & BYTE_MASK;

    58 				}

    59 

    60 				// Message ID must be Simple Trace or ASCII

    61 				if (msgId == OST_SIMPLE_TRACE_ID || msgId == OST_ASCII_TRACE_ID) {

    62 					matches = true;

    63 				}

    64 			}

    65 

    66 		} catch (IOException e) {

    67 

    68 			// Close the stream

    69 		} finally {

    70 			if (is != null) {

    71 				try {

    72 					is.close();

    73 				} catch (IOException e) {

    74 				}

    75 			}

    76 

    77 		}

    78 

    79 		return matches;

    80 	}

    81 }