analysis/org.eclipse.tracecompass.analysis.lami.core/src/org/eclipse/tracecompass/internal/provisional/analysis/lami/core/module/LamiTableEntry.java

   1 /*******************************************************************************
   2  * Copyright (c) 2015, 2016 EfficiOS Inc., Alexandre Montplaisir
   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
  10 package org.eclipse.tracecompass.internal.provisional.analysis.lami.core.module;
  11
  12 import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull;
  13
  14 import java.util.List;
  15 import java.util.Optional;
  16 import java.util.stream.Collectors;
  17
  18 import org.eclipse.jdt.annotation.NonNull;
  19 import org.eclipse.jdt.annotation.Nullable;
  20 import org.eclipse.tracecompass.internal.provisional.analysis.lami.core.types.LamiData;
  21 import org.eclipse.tracecompass.internal.provisional.analysis.lami.core.types.LamiTimeRange;
  22 import org.eclipse.tracecompass.internal.provisional.analysis.lami.core.types.LamiTimestamp;
  23
  24 import com.google.common.collect.ImmutableList;
  25
  26 /**
  27  * Entry of a LAMI output. Usually corresponds to one row in a JSON LAMI table
  28  * output.
  29  *
  30  * @author Alexandre Montplaisir
  31  */
  32 public class LamiTableEntry {
  33
  34     private final List<LamiData> fValues;
  35
  36     /**
  37      * Constructor
  38      *
  39      * @param values Values contained in this row
  40      */
  41     public LamiTableEntry(List<LamiData> values) {
  42         fValues = checkNotNull(ImmutableList.copyOf(values));
  43     }
  44
  45     /**
  46      * Get the value at a given index
  47      *
  48      * @param index
  49      *            Index to look at
  50      * @return The value at this index
  51      */
  52     public LamiData getValue(int index) {
  53         return fValues.get(index);
  54     }
  55
  56     /**
  57      * Get the time range represented by this row.
  58      *
  59      * If more than one exists, one of them (usually the first) is returned.
  60      *
  61      * If there are no time ranges in this row, null is returned.
  62      *
  63      * @return The time range of this row
  64      */
  65     public @Nullable LamiTimeRange getCorrespondingTimeRange() {
  66         /*
  67          * If there is one or more time range(s) in the values, return the first
  68          * one we find directly.
  69          */
  70         Optional<LamiTimeRange> oTimerange = fValues.stream()
  71                 .filter(data -> (data instanceof LamiTimeRange))
  72                 .<@NonNull LamiTimeRange> map(data -> (LamiTimeRange) data)
  73                 .findFirst();
  74         if (oTimerange.isPresent()) {
  75             return oTimerange.get();
  76         }
  77
  78         /* Look for individual timestamps instead  */
  79         List<LamiTimestamp> timestamps = fValues.stream()
  80             .filter(data -> (data instanceof LamiTimestamp))
  81             .<@NonNull LamiTimestamp> map(data -> (LamiTimestamp) data)
  82             .collect(Collectors.toList());
  83
  84         if (timestamps.size() > 1) {
  85             /* We can try using the first two timestamps to create a range (making sure it's valid) */
  86             long first = timestamps.get(0).getValue();
  87             long second = timestamps.get(1).getValue();
  88             if (second >= first) {
  89                 return new LamiTimeRange(first, second);
  90             }
  91         }
  92
  93         if (!timestamps.isEmpty()) {
  94             /* If there is only one timestamp, use it to create a punctual range */
  95             long ts = timestamps.get(0).getValue();
  96             return new LamiTimeRange(ts, ts);
  97         }
  98
  99         /* Didn't find any timestamp we can't use */
 100         return null;
 101     }
 102 }