org.eclipse.tracecompass.ctf.core/src/org/eclipse/linuxtools/ctf/core/event/scope/RootScope.java

   1 /*******************************************************************************
   2  * Copyright (c) 2014 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are made
   5  * 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  *      Matthew Khouzam - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.ctf.core.event.scope;
  14
  15 import org.eclipse.jdt.annotation.NonNullByDefault;
  16 import org.eclipse.jdt.annotation.Nullable;
  17
  18 /**
  19  * A lttng specific speedup node a root with accelerated returns for some scopes
  20  * of a lexical scope
  21  *
  22  * @author Matthew Khouzam
  23  * @since 3.1
  24  */
  25 @NonNullByDefault
  26 public class RootScope extends LexicalScope {
  27
  28     /**
  29      * The scope constructor
  30      */
  31     public RootScope() {
  32         super(null, ""); //$NON-NLS-1$
  33     }
  34
  35     @Override
  36     @Nullable
  37     public LexicalScope getChild(String name) {
  38         /*
  39          * This happens ~40 % of the time
  40          */
  41         if (name.equals(EVENT_HEADER.toString())) {
  42             return EVENT_HEADER;
  43         }
  44         /*
  45          * This happens ~30 % of the time
  46          */
  47         if (name.equals(FIELDS.toString())) {
  48             return FIELDS;
  49         }
  50         /*
  51          * This happens ~30 % of the time
  52          */
  53         if (name.equals(CONTEXT.toString())) {
  54             return CONTEXT;
  55         }
  56         /*
  57          * This happens ~1 % of the time
  58          */
  59         if (name.equals(PACKET_HEADER.toString())) {
  60             return PACKET_HEADER;
  61         }
  62         return super.getChild(name);
  63     }
  64
  65 }