org.eclipse.linuxtools.tmf.tests/stubs/org/eclipse/linuxtools/tmf/trace/TmfEventParserStub.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 - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.tmf.trace;
  14
  15 import java.io.EOFException;
  16 import java.io.IOException;
  17 import java.io.RandomAccessFile;
  18 import java.util.Vector;
  19
  20 import org.eclipse.linuxtools.tmf.event.TmfEvent;
  21 import org.eclipse.linuxtools.tmf.event.TmfEventContent;
  22 import org.eclipse.linuxtools.tmf.event.TmfEventFormat;
  23 import org.eclipse.linuxtools.tmf.event.TmfEventReference;
  24 import org.eclipse.linuxtools.tmf.event.TmfEventSource;
  25 import org.eclipse.linuxtools.tmf.event.TmfEventType;
  26 import org.eclipse.linuxtools.tmf.event.TmfTimestamp;
  27
  28 /**
  29  * <b><u>TmfEventParserStub</u></b>
  30  * <p>
  31  * TODO: Implement me. Please.
  32  */
  33 public class TmfEventParserStub implements ITmfEventParser {
  34
  35     // ========================================================================
  36     // Attributes
  37     // ========================================================================
  38
  39         private final int NB_FORMATS = 10;
  40     private final TmfEventFormat[] fFormats;
  41
  42     // ========================================================================
  43     // Constructors
  44     // ========================================================================
  45
  46     public TmfEventParserStub() {
  47         fFormats = new TmfEventFormat[NB_FORMATS];
  48         for (int i = 0; i < NB_FORMATS; i++) {
  49                 Vector<String> format = new Vector<String>();
  50                 for (int j = 1; j <= i; j++) {
  51                         format.add(new String("Fmt-" + i + "-Fld-" + j));
  52                 }
  53                 String[] fields = new String[i];
  54                 fFormats[i] = new TmfEventFormat(format.toArray(fields));
  55         }
  56     }
  57
  58     // ========================================================================
  59     // Operators
  60     // ========================================================================
  61
  62     /* (non-Javadoc)
  63      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfEventParser#parseNextEvent()
  64      */
  65     static final String typePrefix = "Type-";
  66     public TmfEvent parseNextEvent(ITmfTrace eventStream, TmfTraceContext context) throws IOException {
  67
  68         if (! (eventStream instanceof TmfTraceStub)) {
  69             return null;
  70         }
  71
  72         // Highly inefficient...
  73         RandomAccessFile stream = ((TmfTraceStub) eventStream).getStream();
  74         String name = eventStream.getName();
  75         name = name.substring(name.lastIndexOf('/') + 1);
  76
  77         synchronized(stream) {
  78                 long location = 0;
  79                 if (context != null)
  80                         location = (Long) (context.getLocation());
  81                 stream.seek(location);
  82
  83                 try {
  84                         long ts        = stream.readLong();
  85                         String source  = stream.readUTF();
  86                         String type    = stream.readUTF();
  87                         @SuppressWarnings("unused")
  88                         int reference  = stream.readInt();
  89                         int typeIndex  = Integer.parseInt(type.substring(typePrefix.length()));
  90                         String[] fields = new String[typeIndex];
  91                         for (int i = 0; i < typeIndex; i++) {
  92                                 fields[i] = stream.readUTF();
  93                         }
  94
  95                         // Update the context
  96                         context.setLocation(stream.getFilePointer());
  97                         context.incrIndex();
  98
  99                         String content = "[";
 100                         if (typeIndex > 0) {
 101                                 content += fields[0];
 102                         }
 103                         for (int i = 1; i < typeIndex; i++) {
 104                                 content += ", " + fields[i];
 105                         }
 106                         content += "]";
 107
 108                         TmfEvent event = new TmfEvent(
 109                                         new TmfTimestamp(ts, (byte) -3, 0),     // millisecs
 110                                         new TmfEventSource(source),
 111                                         new TmfEventType(type, fFormats[typeIndex]),
 112                                         new TmfEventContent(content, fFormats[typeIndex]),
 113                                         new TmfEventReference(name));
 114                         return event;
 115                 } catch (EOFException e) {
 116                 }
 117         }
 118         return null;
 119     }
 120
 121 }