org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/statistics/model/StatisticsTreeRootFactory.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  *   Yann N. Dauphin     (dhaemon@gmail.com)  - Implementation for stats
  11  *******************************************************************************/
  12 package org.eclipse.linuxtools.lttng.ui.views.statistics.model;
  13
  14 import java.util.HashMap;
  15 import java.util.Map;
  16
  17 public class StatisticsTreeRootFactory {
  18         // ========================================================================
  19         // Data
  20         // =======================================================================
  21
  22         private static final Map<String, StatisticsTreeNode> rootInstances = new HashMap<String, StatisticsTreeNode>();
  23
  24         // ========================================================================
  25         // Methods
  26         // =======================================================================
  27
  28         /**
  29          * Provide a statisticsTree instance per trace
  30          *
  31          * @return
  32          */
  33         public static StatisticsTreeNode getStatTreeRoot(String traceUniqueId) {
  34                 if (traceUniqueId == null) {
  35                         return null;
  36                 }
  37
  38                 if (rootInstances.containsKey(traceUniqueId)) {
  39                         return rootInstances.get(traceUniqueId);
  40                 }
  41
  42                 StatisticsTreeNode tree = new StatisticsTreeNode(traceUniqueId);
  43
  44                 rootInstances.put(traceUniqueId, tree);
  45
  46                 return tree;
  47         }
  48
  49         /**
  50          * @param traceUniqueId
  51          * @return
  52          */
  53         public static boolean containsTreeRoot(String traceUniqueId) {
  54                 return rootInstances.containsKey(traceUniqueId);
  55         }
  56
  57         /**
  58          * Remove previously registered statistics tree.
  59          * @param traceUniqueId
  60          */
  61         public static void removeStatTreeRoot(String traceUniqueId) {
  62                 if (traceUniqueId != null && rootInstances.containsKey(traceUniqueId)) {
  63                         rootInstances.remove(traceUniqueId);
  64                 }
  65         }
  66
  67         /**
  68          * Remove all tree root instances
  69          */
  70         public static void removeAll() {
  71                 rootInstances.clear();
  72         }
  73 }