org.eclipse.linuxtools.tmf.core.tests/stubs/org/eclipse/linuxtools/tmf/tests/stubs/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.tests.stubs.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.core.event.ITmfEvent;
  21 import org.eclipse.linuxtools.tmf.core.event.ITmfEventField;
  22 import org.eclipse.linuxtools.tmf.core.event.TmfEvent;
  23 import org.eclipse.linuxtools.tmf.core.event.TmfEventField;
  24 import org.eclipse.linuxtools.tmf.core.event.TmfEventType;
  25 import org.eclipse.linuxtools.tmf.core.event.TmfTimestamp;
  26 import org.eclipse.linuxtools.tmf.core.parser.ITmfEventParser;
  27 import org.eclipse.linuxtools.tmf.core.trace.ITmfContext;
  28 import org.eclipse.linuxtools.tmf.core.trace.ITmfTrace;
  29 import org.eclipse.linuxtools.tmf.core.trace.TmfLocation;
  30
  31 /**
  32  * <b><u>TmfEventParserStub</u></b>
  33  * <p>
  34  * TODO: Implement me. Please.
  35  */
  36 @SuppressWarnings("nls")
  37 public class TmfEventParserStub implements ITmfEventParser<TmfEvent> {
  38
  39     // ------------------------------------------------------------------------
  40     // Attributes
  41     // ------------------------------------------------------------------------
  42
  43     private static final int NB_TYPES = 10;
  44     private final TmfEventType[] fTypes;
  45
  46     // ------------------------------------------------------------------------
  47     // Constructors
  48     // ------------------------------------------------------------------------
  49
  50     public TmfEventParserStub() {
  51         fTypes = new TmfEventType[NB_TYPES];
  52         for (int i = 0; i < NB_TYPES; i++) {
  53             final Vector<String> fields = new Vector<String>();
  54             for (int j = 1; j <= i; j++) {
  55                 final String field = "Fmt-" + i + "-Fld-" + j;
  56                 fields.add(field);
  57             }
  58             final String[] fieldArray = new String[i];
  59             final ITmfEventField rootField = TmfEventField.makeRoot(fields.toArray(fieldArray));
  60             fTypes[i] = new TmfEventType("UnitTest", "Type-" + i, rootField);
  61         }
  62     }
  63
  64     // ------------------------------------------------------------------------
  65     // Operators
  66     // ------------------------------------------------------------------------
  67
  68     static final String typePrefix = "Type-";
  69     @Override
  70     @SuppressWarnings("unchecked")
  71     public ITmfEvent parseNextEvent(final ITmfTrace<TmfEvent> eventStream, final ITmfContext context) throws IOException {
  72
  73         if (! (eventStream instanceof TmfTraceStub))
  74             return null;
  75
  76         // Highly inefficient...
  77         final RandomAccessFile stream = ((TmfTraceStub) eventStream).getStream();
  78         //              String name = eventStream.getName();
  79         //              name = name.substring(name.lastIndexOf('/') + 1);
  80
  81         // no need to use synchronized since it's already cover by the calling method
  82
  83         long location = 0;
  84         if (context != null)
  85             location = ((TmfLocation<Long>) (context.getLocation())).getLocation();
  86         stream.seek(location);
  87
  88         try {
  89             final long ts        = stream.readLong();
  90             final String source  = stream.readUTF();
  91             final String type    = stream.readUTF();
  92             final Integer reference  = stream.readInt();
  93             final int typeIndex  = Integer.parseInt(type.substring(typePrefix.length()));
  94             final String[] fields = new String[typeIndex];
  95             for (int i = 0; i < typeIndex; i++)
  96                 fields[i] = stream.readUTF();
  97
  98             final StringBuffer content = new StringBuffer("[");
  99             if (typeIndex > 0)
 100                 content.append(fields[0]);
 101             for (int i = 1; i < typeIndex; i++)
 102                 content.append(", ").append(fields[i]);
 103             content.append("]");
 104
 105             final TmfEventField root = new TmfEventField(ITmfEventField.ROOT_FIELD_ID, content.toString());
 106             final ITmfEvent event = new TmfEvent(eventStream,
 107                     new TmfTimestamp(ts, -3, 0),     // millisecs
 108                     source, fTypes[typeIndex], root, reference.toString());
 109             return event;
 110         } catch (final EOFException e) {
 111         }
 112         return null;
 113     }
 114
 115 }