tmf/org.eclipse.tracecompass.tmf.core.tests/stubs/org/eclipse/tracecompass/tmf/tests/stubs/trace/TmfEventParserStub.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 2014 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.tracecompass.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.tracecompass.tmf.core.event.ITmfEvent;
  21 import org.eclipse.tracecompass.tmf.core.event.ITmfEventField;
  22 import org.eclipse.tracecompass.tmf.core.event.TmfEvent;
  23 import org.eclipse.tracecompass.tmf.core.event.TmfEventField;
  24 import org.eclipse.tracecompass.tmf.core.event.TmfEventType;
  25 import org.eclipse.tracecompass.tmf.core.trace.ITmfContext;
  26 import org.eclipse.tracecompass.tmf.core.trace.ITmfEventParser;
  27 import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
  28
  29 /**
  30  * <b><u>TmfEventParserStub</u></b>
  31  * <p>
  32  * TODO: Implement me. Please.
  33  */
  34 @SuppressWarnings("javadoc")
  35 public class TmfEventParserStub implements ITmfEventParser {
  36
  37     // ------------------------------------------------------------------------
  38     // Attributes
  39     // ------------------------------------------------------------------------
  40
  41     private static final int NB_TYPES = 10;
  42     private final TmfEventType[] fTypes;
  43     private final ITmfTrace fEventStream;
  44
  45     // ------------------------------------------------------------------------
  46     // Constructors
  47     // ------------------------------------------------------------------------
  48
  49     public TmfEventParserStub(final ITmfTrace eventStream) {
  50         fEventStream = eventStream;
  51         fTypes = new TmfEventType[NB_TYPES];
  52         for (int i = 0; i < NB_TYPES; i++) {
  53             final Vector<String> fields = new Vector<>();
  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("Type-" + i, rootField);
  61         }
  62     }
  63
  64     // ------------------------------------------------------------------------
  65     // Operators
  66     // ------------------------------------------------------------------------
  67
  68     static final String typePrefix = "Type-";
  69     @Override
  70     public ITmfEvent parseEvent(final ITmfContext context) {
  71
  72         if (! (fEventStream instanceof TmfTraceStub)) {
  73             return null;
  74         }
  75
  76         // Highly inefficient...
  77         final RandomAccessFile stream = ((TmfTraceStub) fEventStream).getStream();
  78         if (stream == null) {
  79             return null;
  80         }
  81
  82         //           String name = eventStream.getName();
  83         //           name = name.substring(name.lastIndexOf('/') + 1);
  84
  85         // no need to use synchronized since it's already cover by the calling method
  86
  87         long location = 0;
  88         if (context != null && context.getLocation() != null) {
  89             location = (Long) context.getLocation().getLocationInfo();
  90             try {
  91                 stream.seek(location);
  92
  93                 final long ts        = stream.readLong();
  94                 stream.readUTF(); /* Previously source, now unused */
  95                 final String type    = stream.readUTF();
  96                 stream.readInt(); /* Previously reference, now unused */
  97                 final int typeIndex  = Integer.parseInt(type.substring(typePrefix.length()));
  98                 final String[] fields = new String[typeIndex];
  99                 for (int i = 0; i < typeIndex; i++) {
 100                     fields[i] = stream.readUTF();
 101                 }
 102
 103                 final StringBuffer content = new StringBuffer("[");
 104                 if (typeIndex > 0) {
 105                     content.append(fields[0]);
 106                 }
 107                 for (int i = 1; i < typeIndex; i++) {
 108                     content.append(", ").append(fields[i]);
 109                 }
 110                 content.append("]");
 111
 112                 final TmfEventField root = new TmfEventField(ITmfEventField.ROOT_FIELD_ID, content.toString(), null);
 113                 final ITmfEvent event = new TmfEvent(fEventStream,
 114                         ITmfContext.UNKNOWN_RANK,
 115                         fEventStream.createTimestamp(ts * 1000000L),
 116                         fTypes[typeIndex], root);
 117                 return event;
 118             } catch (final EOFException e) {
 119             } catch (final IOException e) {
 120             }
 121         }
 122         return null;
 123     }
 124
 125 }