1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*******************************************************************************
* Copyright (c) 2006, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.core;
import java.util.HashMap;
import java.util.StringTokenizer;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.osgi.util.NLS;
import org.eclipse.team.core.mapping.IStorageMerger;
public class StorageMergerRegistry {
private final static String ID_ATTRIBUTE = "id"; //$NON-NLS-1$
private final static String EXTENSIONS_ATTRIBUTE = "extensions"; //$NON-NLS-1$
private final static String CONTENT_TYPE_ID_ATTRIBUTE = "contentTypeId"; //$NON-NLS-1$
private static final String STORAGE_MERGER_EXTENSION_POINT = "storageMergers"; //$NON-NLS-1$
private static final Object STORAGE_MERGER = "storageMerger"; //$NON-NLS-1$
private static final String CONTENT_TYPE_BINDING= "contentTypeBinding"; //$NON-NLS-1$
private static final String STORAGE_MERGER_ID_ATTRIBUTE= "storageMergerId"; //$NON-NLS-1$
private static boolean NORMALIZE_CASE= true;
private static StorageMergerRegistry instance;
private HashMap<String, Object> fIdMap; // maps ids to datas
private HashMap<String, Object> fExtensionMap; // maps extensions to datas
private HashMap<IContentType, Object> fContentTypeBindings; // maps content type bindings to datas
private boolean fRegistriesInitialized;
public static StorageMergerRegistry getInstance() {
if (instance == null) {
instance = new StorageMergerRegistry();
}
return instance;
}
/**
* Returns a stream merger for the given type.
*
* @param type the type for which to find a stream merger
* @return a stream merger for the given type, or <code>null</code> if no
* stream merger has been registered
*/
public IStorageMerger createStreamMerger(String type) {
initializeRegistry();
StorageMergerDescriptor descriptor= (StorageMergerDescriptor) search(type);
if (descriptor != null)
return descriptor.createStreamMerger();
return null;
}
/**
* Returns a stream merger for the given content type.
*
* @param type the type for which to find a stream merger
* @return a stream merger for the given type, or <code>null</code> if no
* stream merger has been registered
*/
public IStorageMerger createStreamMerger(IContentType type) {
initializeRegistry();
StorageMergerDescriptor descriptor= (StorageMergerDescriptor) search(type);
if (descriptor != null)
return descriptor.createStreamMerger();
return null;
}
private void initializeRegistry() {
if (!fRegistriesInitialized) {
registerExtensions();
fRegistriesInitialized= true;
}
}
/**
* Registers all stream mergers, structure creators, content merge viewers, and structure merge viewers
* that are found in the XML plugin files.
*/
private void registerExtensions() {
IExtensionRegistry registry= Platform.getExtensionRegistry();
// collect all IStreamMergers
IConfigurationElement[] elements= registry.getConfigurationElementsFor(TeamPlugin.ID, STORAGE_MERGER_EXTENSION_POINT);
for (int i= 0; i < elements.length; i++) {
IConfigurationElement element= elements[i];
if (STORAGE_MERGER.equals(element.getName()))
register(element, new StorageMergerDescriptor(element));
else if (CONTENT_TYPE_BINDING.equals(element.getName()))
createBinding(element, STORAGE_MERGER_ID_ATTRIBUTE);
}
}
private static String normalizeCase(String s) {
if (NORMALIZE_CASE && s != null)
return s.toUpperCase();
return s;
}
void register(IConfigurationElement element, Object data) {
String id = element.getAttribute(ID_ATTRIBUTE);
if (id != null) {
if (fIdMap == null)
fIdMap = new HashMap<>();
fIdMap.put(id, data);
}
String types = element.getAttribute(EXTENSIONS_ATTRIBUTE);
if (types != null) {
if (fExtensionMap == null)
fExtensionMap = new HashMap<>();
StringTokenizer tokenizer = new StringTokenizer(types, ","); //$NON-NLS-1$
while (tokenizer.hasMoreElements()) {
String extension = tokenizer.nextToken().trim();
fExtensionMap.put(normalizeCase(extension), data);
}
}
}
void createBinding(IConfigurationElement element, String idAttributeName) {
String type = element.getAttribute(CONTENT_TYPE_ID_ATTRIBUTE);
String id = element.getAttribute(idAttributeName);
if (id == null)
logErrorMessage(NLS.bind("Target attribute id '{0}' missing", idAttributeName)); //$NON-NLS-1$
if (type != null && id != null && fIdMap != null) {
Object o = fIdMap.get(id);
if (o != null) {
IContentType ct = Platform.getContentTypeManager().getContentType(type);
if (ct != null) {
if (fContentTypeBindings == null)
fContentTypeBindings = new HashMap<>();
fContentTypeBindings.put(ct, o);
} else {
logErrorMessage(NLS.bind("Content type id '{0}' not found", type)); //$NON-NLS-1$
}
} else {
logErrorMessage(NLS.bind("Target '{0}' not found", id)); //$NON-NLS-1$$
}
}
}
private void logErrorMessage(String string) {
TeamPlugin.log(IStatus.ERROR, string, null);
}
Object search(IContentType type) {
if (fContentTypeBindings != null) {
for (; type != null; type = type.getBaseType()) {
Object data = fContentTypeBindings.get(type);
if (data != null)
return data;
}
}
return null;
}
Object search(String extension) {
if (fExtensionMap != null)
return fExtensionMap.get(normalizeCase(extension));
return null;
}
}
|
