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  * Dummy test trace. Use in conjunction with TmfEventParserStub.
  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_CACHE_SIZE, false);
  48     }
  49
  50     /**
  51      * @param filename
  52      * @throws FileNotFoundException
  53      */
  54     public TmfTraceStub(String filename, boolean waitForCompletion) throws FileNotFoundException {
  55         this(filename, DEFAULT_CACHE_SIZE, waitForCompletion);
  56     }
  57
  58     /**
  59      * @param filename
  60      * @param cacheSize
  61      * @throws FileNotFoundException
  62      */
  63     public TmfTraceStub(String filename, int cacheSize) throws FileNotFoundException {
  64         this(filename, cacheSize, false);
  65     }
  66
  67     /**
  68      * @param filename
  69      * @param cacheSize
  70      * @throws FileNotFoundException
  71      */
  72     public TmfTraceStub(String filename, int cacheSize, boolean waitForCompletion) throws FileNotFoundException {
  73         super(filename, cacheSize, waitForCompletion);
  74         fTrace = new RandomAccessFile(filename, "r");
  75         fParser = new TmfEventParserStub();
  76         indexStream();
  77     }
  78
  79     // ========================================================================
  80     // Accessors
  81     // ========================================================================
  82
  83     public RandomAccessFile getStream() {
  84         return fTrace;
  85     }
  86
  87     // ========================================================================
  88     // Operators
  89     // ========================================================================
  90
  91     /* (non-Javadoc)
  92      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#seekLocation(java.lang.Object)
  93      */
  94         public TmfTraceContext seekLocation(Object location) {
  95         TmfTraceContext context = null;
  96         try {
  97                 synchronized(fTrace) {
  98                         fTrace.seek((location != null) ? (Long) location : 0);
  99                         context = new TmfTraceContext(getCurrentLocation(), null, 0);
 100                 }
 101                 } catch (IOException e) {
 102                         // TODO Auto-generated catch block
 103                         e.printStackTrace();
 104                 }
 105                 return context;
 106     }
 107
 108     /* (non-Javadoc)
 109      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#getCurrentLocation()
 110      */
 111     @Override
 112         public Object getCurrentLocation() {
 113         try {
 114             return new Long(fTrace.getFilePointer());
 115         } catch (IOException e) {
 116             // TODO Auto-generated catch block
 117             e.printStackTrace();
 118         }
 119         return null;
 120     }
 121
 122         /* (non-Javadoc)
 123          * @see org.eclipse.linuxtools.tmf.trace.TmfTrace#parseEvent()
 124          */
 125         @Override
 126         public TmfEvent parseEvent(TmfTraceContext context) {
 127         try {
 128                         // paserNextEvent updates the context
 129                         TmfEvent event = fParser.parseNextEvent(this, context);
 130                         if (event != null) {
 131                                 context.setTimestamp(event.getTimestamp());
 132                         }
 133                 return event;
 134         }
 135         catch (IOException e) {
 136                 e.printStackTrace();
 137         }
 138         return null;
 139         }
 140
 141         // ========================================================================
 142     // Helper functions
 143     // ========================================================================
 144
 145 }