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70f60307 MK |
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 | } |