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
|
/*******************************************************************************
* Copyright (c) 2001, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Jens Lukowski/Innoopract - initial renaming/restructuring
*
*******************************************************************************/
package org.eclipse.wst.sse.core.internal.modelhandler;
import java.util.HashSet;
import java.util.Iterator;
import org.eclipse.wst.sse.core.internal.ltk.modelhandler.EmbeddedTypeHandler;
import org.eclipse.wst.sse.core.internal.ltk.modelhandler.IDocumentTypeHandler;
/**
*
*/
public class EmbeddedTypeRegistryImpl implements EmbeddedTypeRegistry {
private static EmbeddedTypeRegistry instance = null;
public synchronized static EmbeddedTypeRegistry getInstance() {
if (instance == null) {
instance = new EmbeddedTypeRegistryImpl();
}
return instance;
}
private HashSet hashSet = null;
private EmbeddedTypeHandler registryDefaultHandler = null;
/*
* @see ContentTypeRegistry#getTypeFor(String)
*/
/**
* Constructor for ContentTypeRegistryImpl.
*/
private EmbeddedTypeRegistryImpl() {
super();
hashSet = new HashSet();
new EmbeddedTypeRegistryReader().readRegistry(hashSet);
}
/**
* @see ContentTypeRegistry#add(ContentTypeDescription)
*/
void add(IDocumentTypeHandler contentTypeDescription) {
hashSet.add(contentTypeDescription);
}
private EmbeddedTypeHandler getJSPDefaultEmbeddedType() {
return getTypeFor("text/html"); //$NON-NLS-1$
}
/**
* Method getRegistryDefault. We cache the default handler, since can't
* change once plugin descriptors are loaded.
*
* @return EmbeddedTypeHandler
*/
private EmbeddedTypeHandler getRegistryDefault() {
if (registryDefaultHandler == null) {
Iterator it = hashSet.iterator();
while ((registryDefaultHandler == null) && (it.hasNext())) { // safe
// cast
// since
// 'add'
// requires
// EmbeddedContentTypeDescription
EmbeddedTypeHandler item = (EmbeddedTypeHandler) it.next();
if ((item != null) && (item.isDefault())) {
registryDefaultHandler = item;
break;
}
}
}
return registryDefaultHandler;
}
/**
* Finds the contentTypeDescription based on literal id. Its basically a
* "first found first returned". Note the order is fairly unpredictable,
* so non-unique ids would cause problems.
*/
public EmbeddedTypeHandler getTypeFor(String mimeType) {
// Note: the reason we have this precondition is that the
// default is different inside the registry than when called,
// for example, from the JSPLoader. For the JSPLoader, if there
// is no mimetype, the default should be HTML. Here, if there is
// some mimetype, but it is not recognized, we return a default
// for XML. This is required for various voice xml types, etc.
EmbeddedTypeHandler found = null;
if (mimeType == null || mimeType.trim().length() == 0) {
found = getJSPDefaultEmbeddedType();
} else {
Iterator it = hashSet.iterator();
while ((found == null) && (it.hasNext())) { // safe cast since
// 'add' requires
// EmbeddedContentTypeDescription
EmbeddedTypeHandler item = (EmbeddedTypeHandler) it.next();
if ((item != null) && (item.getSupportedMimeTypes().contains(mimeType))) {
found = item;
break;
}
}
// if no exact match, do the "looser" check
if(found == null) {
it = hashSet.iterator();
while ((found == null) && (it.hasNext())) {
EmbeddedTypeHandler item = (EmbeddedTypeHandler) it.next();
if ((item != null) && (item.canHandleMimeType(mimeType))) {
found = item;
break;
}
}
}
}
// no matches, use default
if (found == null) {
found = getRegistryDefault();
}
return found;
}
}
|
