lttng/org.eclipse.tracecompass.lttng2.kernel.core/src/org/eclipse/tracecompass/internal/lttng2/kernel/core/analysis/graph/model/EventField.java

   1 /*******************************************************************************
   2  * Copyright (c) 2015 École Polytechnique de Montréal
   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.lttng2.kernel.core.analysis.graph.model;
  11
  12 import org.eclipse.tracecompass.common.core.NonNullUtils;
  13 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  14 import org.eclipse.tracecompass.tmf.core.event.ITmfEventField;
  15
  16 /**
  17  * Type casting for getting field values
  18  *
  19  * @author Francis Giraldeau
  20  * @author Geneviève Bastien
  21  */
  22 public class EventField {
  23
  24     /**
  25      * Get int field
  26      *
  27      * @param event
  28      *            the event
  29      * @param name
  30      *            the field name
  31      * @return the long value
  32      */
  33     public static Integer getInt(ITmfEvent event, String name) {
  34         ITmfEventField field = NonNullUtils.checkNotNull(event.getContent().getField(name));
  35         Object value = field.getValue();
  36         if (value instanceof Long) {
  37             return NonNullUtils.checkNotNull(((Long) value).intValue());
  38         }
  39         return NonNullUtils.checkNotNull((Integer) value);
  40     }
  41
  42     /**
  43      * Get long field
  44      *
  45      * @param event
  46      *            the event
  47      * @param name
  48      *            the field name
  49      * @return the long value
  50      */
  51     public static Long getLong(ITmfEvent event, String name) {
  52         ITmfEventField field = NonNullUtils.checkNotNull(event.getContent().getField(name));
  53         return NonNullUtils.checkNotNull((Long) field.getValue());
  54     }
  55
  56     /**
  57      * Get string field
  58      *
  59      * @param event
  60      *            the event
  61      * @param name
  62      *            the field name
  63      * @return the string value
  64      */
  65     public static String getString(ITmfEvent event, String name) {
  66         ITmfEventField field = NonNullUtils.checkNotNull(event.getContent().getField(name));
  67         return NonNullUtils.checkNotNull((String) field.getValue());
  68     }
  69
  70     /**
  71      * Get float field
  72      *
  73      * @param event
  74      *            the event
  75      * @param name
  76      *            the field name
  77      * @return the float value
  78      */
  79     public static double getFloat(ITmfEvent event, String name) {
  80         ITmfEventField field = NonNullUtils.checkNotNull(event.getContent().getField(name));
  81         return NonNullUtils.checkNotNull((Double) field.getValue());
  82     }
  83
  84     /**
  85      * Get string field with default value
  86      *
  87      * @param event
  88      *            the event
  89      * @param name
  90      *            the field name
  91      * @param def
  92      *            the default value to return if the field does not exists
  93      * @return the long value
  94      */
  95     public static String getOrDefault(ITmfEvent event, String name, String def) {
  96         ITmfEventField field = event.getContent().getField(name);
  97         if (field == null) {
  98             return def;
  99         }
 100         return NonNullUtils.checkNotNull((String) field.getValue());
 101     }
 102 }