org.eclipse.linuxtools.lttng.ui/stubs/org/eclipse/linuxtools/lttng/stubs/LTTngTraceStub.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 (fchouinard@gmail.com) - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.lttng.stubs;
  14
  15 import java.io.FileNotFoundException;
  16 import java.io.IOException;
  17 import java.io.RandomAccessFile;
  18
  19 import org.eclipse.linuxtools.lttng.event.LttngEvent;
  20 import org.eclipse.linuxtools.tmf.event.TmfEvent;
  21 import org.eclipse.linuxtools.tmf.parser.ITmfEventParser;
  22 import org.eclipse.linuxtools.tmf.trace.TmfTrace;
  23 import org.eclipse.linuxtools.tmf.trace.TmfTraceContext;
  24
  25 /**
  26  * <b><u>LTTngTraceStub</u></b>
  27  * <p>
  28  * Dummy test trace. Use in conjunction with LTTngEventParserStub.
  29  */
  30 public class LTTngTraceStub extends TmfTrace<LttngEvent> {
  31
  32     // ========================================================================
  33     // Attributes
  34     // ========================================================================
  35
  36     // The actual stream
  37     private final RandomAccessFile fTrace;
  38
  39     // The associated event parser
  40     private final ITmfEventParser fParser;
  41
  42     // ========================================================================
  43     // Constructors
  44     // ========================================================================
  45
  46     /**
  47      * @param filename
  48      * @param parser
  49      * @throws FileNotFoundException
  50      */
  51     public LTTngTraceStub(String filename) throws FileNotFoundException {
  52         this(filename, DEFAULT_CACHE_SIZE);
  53     }
  54
  55     /**
  56      * @param filename
  57      * @param parser
  58      * @param cacheSize
  59      * @throws FileNotFoundException
  60      */
  61     public LTTngTraceStub(String filename, int cacheSize) throws FileNotFoundException {
  62         super(LttngEvent.class, filename, cacheSize);
  63         fTrace = new RandomAccessFile(filename, "r");
  64         fParser = new LTTngEventParserStub();
  65         indexTrace(true);
  66     }
  67
  68     // ========================================================================
  69     // Accessors
  70     // ========================================================================
  71
  72     public RandomAccessFile getStream() {
  73         return fTrace;
  74     }
  75
  76     // ========================================================================
  77     // Operators
  78     // ========================================================================
  79
  80     /* (non-Javadoc)
  81      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#seekLocation(java.lang.Object)
  82      */
  83         public TmfTraceContext seekLocation(Object location) {
  84         TmfTraceContext context = null;
  85         try {
  86                 synchronized(fTrace) {
  87                         fTrace.seek((location != null) ? (Long) location : 0);
  88                         context = new TmfTraceContext(getCurrentLocation(), 0);
  89 //                      TmfTraceContext context2 = new TmfTraceContext(getCurrentLocation(), 0);
  90 //                      TmfEvent event = parseEvent(context2);
  91 //                      context.setTimestamp(event.getTimestamp());
  92                 }
  93         } catch (IOException e) {
  94                 // TODO Auto-generated catch block
  95                 e.printStackTrace();
  96         }
  97         return context;
  98     }
  99
 100     /* (non-Javadoc)
 101      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#getCurrentLocation()
 102      */
 103     @Override
 104         public Object getCurrentLocation() {
 105         try {
 106                 return new Long(fTrace.getFilePointer());
 107         } catch (IOException e) {
 108                 // TODO Auto-generated catch block
 109                 e.printStackTrace();
 110         }
 111         return null;
 112     }
 113
 114         /* (non-Javadoc)
 115          * @see org.eclipse.linuxtools.tmf.trace.ITmfTrace#parseEvent()
 116          */
 117         @Override
 118         public TmfEvent parseEvent(TmfTraceContext context) {
 119         try {
 120                         // paserNextEvent updates the context
 121                         TmfEvent event = fParser.parseNextEvent(this, context);
 122 //                      if (event != null) {
 123 //                              context.setTimestamp(event.getTimestamp());
 124 //                      }
 125                 return event;
 126         }
 127         catch (IOException e) {
 128                 e.printStackTrace();
 129         }
 130         return null;
 131         }
 132
 133         /* (non-Javadoc)
 134          * @see java.lang.Object#toString()
 135          */
 136         @Override
 137         public String toString() {
 138                 return "[LTTngTraceStub]";
 139         }
 140
 141 //    // ========================================================================
 142 //    // Helper functions
 143 //    // ========================================================================
 144 //
 145 //    /* (non-Javadoc)
 146 //     * @see org.eclipse.linuxtools.tmf.eventlog.ITmfEventStream#getAttributes()
 147 //     */
 148 //    public Map<String, Object> getAttributes() {
 149 //        // TODO Auto-generated method stub
 150 //        return null;
 151 //    }
 152
 153 }