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  * FileMap class

    17  *

    18  */

    19 package com.nokia.traceviewer.engine;

    20 

    21 import java.util.ArrayList;

    22 import java.util.List;

    23 

    24 /**

    25  * Hold information about trace block positions in file

    26  * 

    27  */

    28 public class FileMap {

    29 

    30 	/**

    31 	 * Map which holds the file pointers to messages

    32 	 */

    33 	private final List<Long> map;

    34 

    35 	/**

    36 	 * Constructor

    37 	 */

    38 	public FileMap() {

    39 		map = new ArrayList<Long>();

    40 	}

    41 

    42 	/**

    43 	 * Insert item to map

    44 	 * 

    45 	 * @param item

    46 	 *            item

    47 	 */

    48 	public void insert(Long item) {

    49 		map.add(item);

    50 	}

    51 

    52 	/**

    53 	 * Gets item from map

    54 	 * 

    55 	 * @param index

    56 	 *            index of item

    57 	 * @return item

    58 	 */

    59 	public Long getItem(int index) {

    60 		long item = 0;

    61 		if (index < 0) {

    62 			item = 0;

    63 		} else if (index > map.size() - 1) {

    64 			item = 0;

    65 		} else {

    66 			item = map.get(index).longValue();

    67 		}

    68 		return Long.valueOf(item);

    69 	}

    70 

    71 	/**

    72 	 * Gets index from map from specific offset

    73 	 * 

    74 	 * @param offset

    75 	 *            offset of item

    76 	 * @return index

    77 	 */

    78 	public int getIndexFromOffset(int offset) {

    79 		int index = (offset / TraceViewerGlobals.blockSize);

    80 		return index;

    81 	}

    82 

    83 	/**

    84 	 * Empties map

    85 	 */

    86 	public void clearMap() {

    87 		map.clear();

    88 	}

    89 

    90 	/**

    91 	 * Gets size of this map

    92 	 * 

    93 	 * @return size

    94 	 */

    95 	public int size() {

    96 		return map.size();

    97 	}

    98 }