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1 | /******************************************************************************* |
2 | * Copyright (c) 2000, 2008 IBM Corporation and others. | |
3 | * All rights reserved. This program and the accompanying materials | |
4 | * are made available under the terms of the Eclipse Public License v1.0 | |
5 | * which accompanies this distribution, and is available at | |
6 | * http://www.eclipse.org/legal/epl-v10.html | |
7 | * | |
8 | * Contributors: | |
9 | * IBM Corporation - initial API and implementation | |
10 | *******************************************************************************/ | |
11 | ||
12 | package org.eclipse.jdt.internal.ui.search; | |
13 | ||
14 | import org.eclipse.core.runtime.CoreException; | |
15 | import org.eclipse.core.runtime.IConfigurationElement; | |
16 | import org.eclipse.core.runtime.IStatus; | |
17 | import org.eclipse.core.runtime.Status; | |
18 | ||
19 | import org.eclipse.jdt.internal.corext.util.Messages; | |
20 | ||
21 | import org.eclipse.jdt.ui.search.IQueryParticipant; | |
22 | ||
23 | import org.eclipse.jdt.internal.ui.JavaPlugin; | |
24 | ||
25 | /** | |
26 | */ | |
27 | public class SearchParticipantDescriptor { | |
28 | private static final String CLASS= "class"; //$NON-NLS-1$ | |
29 | private static final String NATURE= "nature"; //$NON-NLS-1$ | |
30 | private static final String ID= "id"; //$NON-NLS-1$ | |
31 | ||
32 | private IConfigurationElement fConfigurationElement; | |
33 | private boolean fEnabled; // | |
34 | ||
35 | protected SearchParticipantDescriptor(IConfigurationElement configElement) { | |
36 | fConfigurationElement= configElement; | |
37 | fEnabled= true; | |
38 | } | |
39 | ||
40 | /** | |
41 | * checks whether a participant has all the proper attributes. | |
42 | * | |
43 | * @return returns a status describing the result of the validation | |
44 | */ | |
45 | protected IStatus checkSyntax() { | |
46 | if (fConfigurationElement.getAttribute(ID) == null) { | |
47 | String format= SearchMessages.SearchParticipant_error_noID; | |
48 | String message= Messages.format(format, new String[] { fConfigurationElement.getDeclaringExtension().getUniqueIdentifier() }); | |
49 | return new Status(IStatus.ERROR, JavaPlugin.getPluginId(), 0, message, null); | |
50 | } | |
51 | if (fConfigurationElement.getAttribute(NATURE) == null) { | |
52 | String format= SearchMessages.SearchParticipant_error_noNature; | |
53 | String message= Messages.format(format, new String[] { fConfigurationElement.getAttribute(ID)}); | |
54 | return new Status(IStatus.ERROR, JavaPlugin.getPluginId(), 0, message, null); | |
55 | } | |
56 | ||
57 | if (fConfigurationElement.getAttribute(CLASS) == null) { | |
58 | String format= SearchMessages.SearchParticipant_error_noClass; | |
59 | String message= Messages.format(format, new String[] { fConfigurationElement.getAttribute(ID)}); | |
60 | return new Status(IStatus.ERROR, JavaPlugin.getPluginId(), 0, message, null); | |
61 | } | |
62 | return Status.OK_STATUS; | |
63 | } | |
64 | ||
65 | public String getID() { | |
66 | return fConfigurationElement.getAttribute(ID); | |
67 | } | |
68 | ||
69 | public void disable() { | |
70 | fEnabled= false; | |
71 | } | |
72 | ||
73 | public boolean isEnabled() { | |
74 | return fEnabled; | |
75 | } | |
76 | ||
77 | protected IQueryParticipant create() throws CoreException { | |
78 | try { | |
79 | return (IQueryParticipant) fConfigurationElement.createExecutableExtension(CLASS); | |
80 | } catch (ClassCastException e) { | |
81 | throw new CoreException(new Status(IStatus.ERROR, JavaPlugin.getPluginId(), 0, SearchMessages.SearchParticipant_error_classCast, e)); | |
82 | } | |
83 | } | |
84 | ||
85 | protected String getNature() { | |
86 | return fConfigurationElement.getAttribute(NATURE); | |
87 | } | |
88 | ||
89 | ||
90 | } |