org.eclipse.linuxtools.lttng.ui.tests/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.ITmfLocation;
  23 import org.eclipse.linuxtools.tmf.trace.ITmfTrace;
  24 import org.eclipse.linuxtools.tmf.trace.TmfContext;
  25 import org.eclipse.linuxtools.tmf.trace.TmfLocation;
  26 import org.eclipse.linuxtools.tmf.trace.TmfTrace;
  27
  28 /**
  29  * <b><u>LTTngTraceStub</u></b>
  30  * <p>
  31  * Dummy test trace. Use in conjunction with LTTngEventParserStub.
  32  */
  33 @SuppressWarnings("nls")
  34 public class LTTngTraceStub extends TmfTrace<LttngEvent> {
  35
  36     // ========================================================================
  37     // Attributes
  38     // ========================================================================
  39
  40     // The actual stream
  41     private final RandomAccessFile fTrace;
  42
  43     // The associated event parser
  44     private final ITmfEventParser fParser;
  45
  46     // ========================================================================
  47     // Constructors
  48     // ========================================================================
  49
  50     /**
  51      * @param filename
  52      * @param parser
  53      * @throws FileNotFoundException
  54      */
  55     public LTTngTraceStub(String filename) throws FileNotFoundException {
  56         this(filename, DEFAULT_INDEX_PAGE_SIZE);
  57     }
  58
  59     /**
  60      * @param filename
  61      * @param parser
  62      * @param cacheSize
  63      * @throws FileNotFoundException
  64      */
  65     public LTTngTraceStub(String filename, int cacheSize) throws FileNotFoundException {
  66         super(filename, LttngEvent.class, filename, cacheSize);
  67         fTrace = new RandomAccessFile(filename, "r");
  68         fParser = new LTTngEventParserStub();
  69 //      indexTrace(true);
  70     }
  71
  72         @Override
  73         public ITmfTrace createTraceCopy() {
  74                 ITmfTrace returnedValue = null;
  75                 try {
  76                         returnedValue = new LTTngTraceStub(this.getName());
  77                 }
  78                 catch (FileNotFoundException e) {
  79                         e.printStackTrace();
  80                 }
  81                 return returnedValue;
  82         }
  83
  84     // ========================================================================
  85     // Accessors
  86     // ========================================================================
  87
  88     public RandomAccessFile getStream() {
  89         return fTrace;
  90     }
  91
  92     // ========================================================================
  93     // Operators
  94     // ========================================================================
  95
  96     /* (non-Javadoc)
  97      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#seekLocation(java.lang.Object)
  98      */
  99         @Override
 100         @SuppressWarnings("unchecked")
 101         public TmfContext seekLocation(ITmfLocation<?> location) {
 102         TmfContext context = null;
 103         try {
 104                 synchronized(fTrace) {
 105                         fTrace.seek((location != null) ? ((TmfLocation<Long>) location).getLocation() : 0);
 106                         context = new TmfContext(getCurrentLocation(), 0);
 107 //                      TmfTraceContext context2 = new TmfTraceContext(getCurrentLocation(), 0);
 108 //                      TmfEvent event = parseEvent(context2);
 109 //                      context.setTimestamp(event.getTimestamp());
 110                 }
 111         } catch (IOException e) {
 112                 // TODO Auto-generated catch block
 113                 e.printStackTrace();
 114         }
 115         return context;
 116     }
 117
 118     /* (non-Javadoc)
 119      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#getCurrentLocation()
 120      */
 121     @Override
 122         public ITmfLocation<?> getCurrentLocation() {
 123         try {
 124                 return new TmfLocation<Long>(fTrace.getFilePointer());
 125         } catch (IOException e) {
 126                 // TODO Auto-generated catch block
 127                 e.printStackTrace();
 128         }
 129         return null;
 130     }
 131
 132         /* (non-Javadoc)
 133          * @see org.eclipse.linuxtools.tmf.trace.ITmfTrace#parseEvent()
 134          */
 135         @Override
 136         public TmfEvent parseEvent(TmfContext context) {
 137         try {
 138                         // paserNextEvent updates the context
 139                         TmfEvent event = fParser.parseNextEvent(this, context);
 140 //                      if (event != null) {
 141 //                              context.setTimestamp(event.getTimestamp());
 142 //                      }
 143                 return event;
 144         }
 145         catch (IOException e) {
 146                 e.printStackTrace();
 147         }
 148         return null;
 149         }
 150
 151         /* (non-Javadoc)
 152          * @see java.lang.Object#toString()
 153          */
 154         @Override
 155         public String toString() {
 156                 return "[LTTngTraceStub]";
 157         }
 158
 159 //    // ========================================================================
 160 //    // Helper functions
 161 //    // ========================================================================
 162 //
 163 //    /* (non-Javadoc)
 164 //     * @see org.eclipse.linuxtools.tmf.eventlog.ITmfEventStream#getAttributes()
 165 //     */
 166 //    public Map<String, Object> getAttributes() {
 167 //        // TODO Auto-generated method stub
 168 //        return null;
 169 //    }
 170
 171 }