org.eclipse.linuxtools.tmf.tests/stubs/org/eclipse/linuxtools/tmf/trace/TmfTraceStub.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Francois Chouinard - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.tmf.trace;
  14
  15 import java.io.FileNotFoundException;
  16 import java.io.IOException;
  17 import java.io.RandomAccessFile;
  18
  19 import org.eclipse.linuxtools.tmf.event.TmfEvent;
  20
  21 /**
  22  * <b><u>TmfTraceStub</u></b>
  23  * <p>
  24  * TODO: Implement me. Please.
  25  */
  26 public class TmfTraceStub extends TmfTrace {
  27
  28     // ========================================================================
  29     // Attributes
  30     // ========================================================================
  31
  32     // The actual stream
  33     private final RandomAccessFile fTrace;
  34
  35     // The associated event parser
  36     private final ITmfEventParser fParser;
  37
  38     // ========================================================================
  39     // Constructors
  40     // ========================================================================
  41
  42     /**
  43      * @param filename
  44      * @throws FileNotFoundException
  45      */
  46     public TmfTraceStub(String filename) throws FileNotFoundException {
  47         this(filename, DEFAULT_PAGE_SIZE);
  48     }
  49
  50     /**
  51      * @param filename
  52      * @param cacheSize
  53      * @throws FileNotFoundException
  54      */
  55     public TmfTraceStub(String filename, int cacheSize) throws FileNotFoundException {
  56         super(filename, cacheSize, true);
  57         fTrace = new RandomAccessFile(filename, "r");
  58         fParser = new TmfEventParserStub();
  59         indexStream();
  60     }
  61
  62     // ========================================================================
  63     // Accessors
  64     // ========================================================================
  65
  66     public RandomAccessFile getStream() {
  67         return fTrace;
  68     }
  69
  70     // ========================================================================
  71     // Operators
  72     // ========================================================================
  73
  74     /* (non-Javadoc)
  75      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#seekLocation(java.lang.Object)
  76      */
  77         public TmfTraceContext seekLocation(Object location) {
  78         TmfTraceContext context = null;
  79         try {
  80                 synchronized(fTrace) {
  81                         fTrace.seek((location != null) ? (Long) location : 0);
  82                         context = new TmfTraceContext(getCurrentLocation(), null, 0);
  83                 }
  84                 } catch (IOException e) {
  85                         // TODO Auto-generated catch block
  86                         e.printStackTrace();
  87                 }
  88                 return context;
  89     }
  90
  91     /* (non-Javadoc)
  92      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#getCurrentLocation()
  93      */
  94     @Override
  95         public Object getCurrentLocation() {
  96         try {
  97             return new Long(fTrace.getFilePointer());
  98         } catch (IOException e) {
  99             // TODO Auto-generated catch block
 100             e.printStackTrace();
 101         }
 102         return null;
 103     }
 104
 105         /* (non-Javadoc)
 106          * @see org.eclipse.linuxtools.tmf.trace.TmfTrace#parseEvent()
 107          */
 108         @Override
 109         public synchronized TmfEvent parseEvent(TmfTraceContext context) {
 110         try {
 111                 fTrace.seek((context.location != null) ? (Long) context.location : 0);
 112                 TmfEvent event = fParser.parseNextEvent(this);
 113                 context = new TmfTraceContext(getCurrentLocation(), null, 0);
 114                 return event;
 115         }
 116         catch (IOException e) {
 117                 e.printStackTrace();
 118         }
 119         return null;
 120         }
 121
 122         // ========================================================================
 123     // Helper functions
 124     // ========================================================================
 125
 126 }