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_TRACE_CACHE_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         super(resource, LttngEvent.class, resource.getName(), cacheSize);
  69         fTrace = new RandomAccessFile(resource.getName(), "r");
  70         fParser = new LTTngEventParserStub();
  71     }
  72
  73     public void indexTrace() {
  74         fIndexer.buildIndex(true);
  75     }
  76
  77     // ========================================================================
  78     // Accessors
  79     // ========================================================================
  80
  81     public RandomAccessFile getStream() {
  82         return fTrace;
  83     }
  84
  85     // ========================================================================
  86     // Operators
  87     // ========================================================================
  88
  89     /* (non-Javadoc)
  90      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#seekLocation(java.lang.Object)
  91      */
  92     @Override
  93     @SuppressWarnings("unchecked")
  94     public TmfContext seekLocation(final ITmfLocation<?> location) {
  95         TmfContext context = null;
  96         try {
  97             synchronized(fTrace) {
  98                 fTrace.seek((location != null) ? ((TmfLocation<Long>) location).getLocation() : 0);
  99                 context = new TmfContext(getCurrentLocation(), 0);
 100                 //                      TmfTraceContext context2 = new TmfTraceContext(getCurrentLocation(), 0);
 101                 //                      TmfEvent event = parseEvent(context2);
 102                 //                      context.setTimestamp(event.getTimestamp());
 103             }
 104         } catch (final IOException e) {
 105             // TODO Auto-generated catch block
 106             e.printStackTrace();
 107         }
 108         return context;
 109     }
 110
 111     @Override
 112     public TmfContext seekLocation(final double ratio) {
 113         // TODO Auto-generated method stub
 114         return null;
 115     }
 116
 117     @Override
 118     public double getLocationRatio(final ITmfLocation<?> location) {
 119         // TODO Auto-generated method stub
 120         return 0;
 121     }
 122
 123     /* (non-Javadoc)
 124      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#getCurrentLocation()
 125      */
 126     @Override
 127     public ITmfLocation<?> getCurrentLocation() {
 128         try {
 129             return new TmfLocation<Long>(fTrace.getFilePointer());
 130         } catch (final IOException e) {
 131             // TODO Auto-generated catch block
 132             e.printStackTrace();
 133         }
 134         return null;
 135     }
 136
 137     /* (non-Javadoc)
 138      * @see org.eclipse.linuxtools.tmf.trace.ITmfTrace#parseEvent()
 139      */
 140     @Override
 141     public ITmfEvent parseEvent(final ITmfContext context) {
 142         try {
 143             // paserNextEvent updates the context
 144             final LttngEvent event = (LttngEvent) fParser.parseNextEvent(this, context);
 145             //                          if (event != null) {
 146             //                                  context.setTimestamp(event.getTimestamp());
 147             //                          }
 148             return event;
 149         }
 150         catch (final IOException e) {
 151             e.printStackTrace();
 152         }
 153         return null;
 154     }
 155
 156     /* (non-Javadoc)
 157      * @see java.lang.Object#toString()
 158      */
 159     @Override
 160     public String toString() {
 161         return "[LTTngTraceStub]";
 162     }
 163
 164     //    // ========================================================================
 165     //    // Helper functions
 166     //    // ========================================================================
 167     //
 168     //    /* (non-Javadoc)
 169     //     * @see org.eclipse.linuxtools.tmf.eventlog.ITmfEventStream#getAttributes()
 170     //     */
 171     //    public Map<String, Object> getAttributes() {
 172     //        // TODO Auto-generated method stub
 173     //        return null;
 174     //    }
 175
 176 }