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