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1
19
20 package org.netbeans.editor.example;
21
22 import java.io.*;
23 import java.util.*;
24 import org.netbeans.editor.ext.html.dtd.ReaderProvider;
25 import org.netbeans.editor.ext.html.dtd.Registry;
26
27 public class SAReaderProvider implements ReaderProvider {
28
29 private static final String  DTD_FOLDER = "DTDs"; private static final String CATALOG_FILE_NAME = "catalog";
32 Map mapping = null;
33 boolean valid = false;
34 File dtdSetFolder;
35
36 public static void setupReaders() {
37 File rootFolder = Editor.getDistributionDirectory();
39
40 File dtdFolder = findFile( rootFolder, DTD_FOLDER );
42 if( dtdFolder != null) {
43 processSubfolders( dtdFolder );
44 }
45 }
46
47
48
49 public SAReaderProvider( File folder ) {
50 dtdSetFolder = folder;
51 revalidate(true);
52 }
54
55 public Collection getIdentifiers() {
56 return valid ? mapping.keySet() : new HashSet(0);
57 }
58
59 private static File findFile(File folder, String fileName) {
60 if (fileName == null || folder == null) {
61 return null;
62 }
63
64 File[] files = folder.listFiles();
65
66 for (int cntr = 0; cntr < files.length; cntr++) {
67 if (fileName.equals(files[cntr].getName())) {
68 return files[cntr];
69 }
70 }
71 return null;
72 }
73
74 public Reader getReaderForIdentifier( String identifier, String filename) {
75 if( !valid ) return null;
76
77 String fileName = (String )mapping.get( identifier );
78 if( fileName == null ) return null;
79 if( dtdSetFolder == null ) return null;
80
81 File file = findFile( dtdSetFolder, fileName );
82 if( file == null ) return null;
83
84 try {
85 return new InputStreamReader( new FileInputStream (file ) );
86 } catch( FileNotFoundException exc ) {
87 return null;
88 }
89 }
90
91 private void invalidate() {
92 if( valid ) {
93 valid = false;
94 Registry.invalidateReaderProvider( this );
95 }
96 }
97
98 private boolean revalidate( boolean flag ) {
99 if( mapping == null || flag ) {
100 File catalog = findFile( dtdSetFolder, CATALOG_FILE_NAME );
101
102 if( catalog == null ) {
103 mapping = null;
104 } else try {
105 mapping = parseCatalog( new InputStreamReader( new FileInputStream( catalog ) ) );
106 } catch( FileNotFoundException exc ) {
107 mapping = null;
108 }
109
110 if( mapping == null ) {
111 invalidate();
112 return false;
113 }
114 }
115
116 Collection files = mapping.values();
118 boolean all = true;
119 for( Iterator it = files.iterator(); it.hasNext(); ) {
120 String fname = (String )it.next();
121 if( findFile( dtdSetFolder, fname ) == null ) {
122 all = false;
123 break;
124 }
125 }
126 if( !all ) invalidate();
127 valid = all;
128 return valid;
129 }
130
131 private Map parseCatalog( Reader catalogReader ) {
132 HashMap hashmap = new HashMap();
133 LineNumberReader reader = new LineNumberReader( catalogReader );
134
135 for( ;; ) {
136 String line;
137
138 try {
139 line = reader.readLine();
140 } catch( IOException exc ) {
141 return null;
142 }
143
144 if( line == null ) break;
145
146 StringTokenizer st = new StringTokenizer( line );
147 if( st.hasMoreTokens() && "PUBLIC".equals( st.nextToken() ) && st.hasMoreTokens() ) { st.nextToken( "\"" ); if( !st.hasMoreTokens() ) continue;
150 String id = st.nextToken( "\"" );
152 if( !st.hasMoreTokens() ) continue;
153 st.nextToken( " \t\n\r\f" );
155 if( !st.hasMoreTokens() ) continue;
156 String file = st.nextToken();
157 hashmap.put( id, file );
158 }
159 }
160 return hashmap;
161 }
162
163 private static void processSubfolders( File dtdFolder ) {
164 File[] files = dtdFolder.listFiles();
165
166 for (int cntr = 0; cntr < files.length; cntr++) {
167 File file = files[cntr];
168
169 if (file != null && file.isDirectory()) {
170 addFolder( file );
171 }
172 }
173 }
174
175 static Map folder2provider = new HashMap();
176
177
178 private static void removeSubfolders() {
179 Iterator it = folder2provider.entrySet().iterator();
180 folder2provider = new HashMap();
181 while( it.hasNext() ) {
182 Map.Entry entry = (Map.Entry)it.next();
183 ReaderProvider prov = (ReaderProvider)entry.getValue();
184 Registry.unregisterReaderProvider( prov );
185 }
186 }
187
188 private static void addFolder( File folder ) {
189 SAReaderProvider prov = new SAReaderProvider( folder );
190 folder2provider.put( folder.getName(), prov );
191 Registry.registerReaderProvider( prov );
192 }
193
194 private static void removeFolder( File folder ) {
195 SAReaderProvider prov = (SAReaderProvider)folder2provider.remove( folder.getName() );
196 if( prov != null ) Registry.unregisterReaderProvider( prov );
197 }
198
199 }
200
201 |
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