org.eclipse.linuxtools.lttng.ui.tests/stubs/org/eclipse/linuxtools/internal/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.internal.lttng.stubs;
  14
  15 import java.io.FileNotFoundException;
  16 import java.io.IOException;
  17 import java.io.RandomAccessFile;
  18
  19 import org.eclipse.core.resources.IResource;
  20 import org.eclipse.linuxtools.internal.lttng.core.event.LttngEvent;
  21 import org.eclipse.linuxtools.tmf.core.event.ITmfEvent;
  22 import org.eclipse.linuxtools.tmf.core.parser.ITmfEventParser;
  23 import org.eclipse.linuxtools.tmf.core.trace.ITmfContext;
  24 import org.eclipse.linuxtools.tmf.core.trace.ITmfLocation;
  25 import org.eclipse.linuxtools.tmf.core.trace.TmfContext;
  26 import org.eclipse.linuxtools.tmf.core.trace.TmfLocation;
  27 import org.eclipse.linuxtools.tmf.core.trace.TmfTrace;
  28
  29 /**
  30  * <b><u>LTTngTraceStub</u></b>
  31  * <p>
  32  * Dummy test trace. Use in conjunction with LTTngEventParserStub.
  33  */
  34 @SuppressWarnings("nls")
  35 public class LTTngTraceStub extends TmfTrace<LttngEvent> {
  36
  37     // ========================================================================
  38     // Attributes
  39     // ========================================================================
  40
  41     // The actual stream
  42     private final RandomAccessFile fTrace;
  43
  44     // The associated event parser
  45     private final ITmfEventParser<LttngEvent> fParser;
  46
  47     // ========================================================================
  48     // Constructors
  49     // ========================================================================
  50
  51     /**
  52      * @param filename
  53      * @param parser
  54      * @throws FileNotFoundException
  55      */
  56     public LTTngTraceStub(final IResource resource) throws FileNotFoundException {
  57         this(resource, DEFAULT_INDEX_PAGE_SIZE);
  58     }
  59
  60     /**
  61      * @param filename
  62      * @param parser
  63      * @param cacheSize
  64      * @throws FileNotFoundException
  65      */
  66     public LTTngTraceStub(final IResource resource, final int cacheSize) throws FileNotFoundException {
  67         super(resource, LttngEvent.class, resource.getName(), cacheSize, true);
  68         fTrace = new RandomAccessFile(resource.getName(), "r");
  69         fParser = new LTTngEventParserStub();
  70         //      indexTrace(true);
  71     }
  72
  73     // ========================================================================
  74     // Accessors
  75     // ========================================================================
  76
  77     public RandomAccessFile getStream() {
  78         return fTrace;
  79     }
  80
  81     // ========================================================================
  82     // Operators
  83     // ========================================================================
  84
  85     /* (non-Javadoc)
  86      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#seekLocation(java.lang.Object)
  87      */
  88     @Override
  89     @SuppressWarnings("unchecked")
  90     public TmfContext seekLocation(final ITmfLocation<?> location) {
  91         TmfContext context = null;
  92         try {
  93             synchronized(fTrace) {
  94                 fTrace.seek((location != null) ? ((TmfLocation<Long>) location).getLocation() : 0);
  95                 context = new TmfContext(getCurrentLocation(), 0);
  96                 //                      TmfTraceContext context2 = new TmfTraceContext(getCurrentLocation(), 0);
  97                 //                      TmfEvent event = parseEvent(context2);
  98                 //                      context.setTimestamp(event.getTimestamp());
  99             }
 100         } catch (final IOException e) {
 101             // TODO Auto-generated catch block
 102             e.printStackTrace();
 103         }
 104         return context;
 105     }
 106
 107     @Override
 108     public TmfContext seekLocation(final double ratio) {
 109         // TODO Auto-generated method stub
 110         return null;
 111     }
 112
 113     @Override
 114     public double getLocationRatio(final ITmfLocation<?> location) {
 115         // TODO Auto-generated method stub
 116         return 0;
 117     }
 118
 119     /* (non-Javadoc)
 120      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#getCurrentLocation()
 121      */
 122     @Override
 123     public ITmfLocation<?> getCurrentLocation() {
 124         try {
 125             return new TmfLocation<Long>(fTrace.getFilePointer());
 126         } catch (final IOException e) {
 127             // TODO Auto-generated catch block
 128             e.printStackTrace();
 129         }
 130         return null;
 131     }
 132
 133     /* (non-Javadoc)
 134      * @see org.eclipse.linuxtools.tmf.trace.ITmfTrace#parseEvent()
 135      */
 136     @Override
 137     public ITmfEvent parseEvent(final ITmfContext context) {
 138         try {
 139             // paserNextEvent updates the context
 140             final LttngEvent event = (LttngEvent) fParser.parseNextEvent(this, context);
 141             //                          if (event != null) {
 142             //                                  context.setTimestamp(event.getTimestamp());
 143             //                          }
 144             return event;
 145         }
 146         catch (final IOException e) {
 147             e.printStackTrace();
 148         }
 149         return null;
 150     }
 151
 152     /* (non-Javadoc)
 153      * @see java.lang.Object#toString()
 154      */
 155     @Override
 156     public String toString() {
 157         return "[LTTngTraceStub]";
 158     }
 159
 160     //    // ========================================================================
 161     //    // Helper functions
 162     //    // ========================================================================
 163     //
 164     //    /* (non-Javadoc)
 165     //     * @see org.eclipse.linuxtools.tmf.eventlog.ITmfEventStream#getAttributes()
 166     //     */
 167     //    public Map<String, Object> getAttributes() {
 168     //        // TODO Auto-generated method stub
 169     //        return null;
 170     //    }
 171
 172 }