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1
23
24 package org.apache.webdav.lib.util;
25
26 import java.io.OutputStreamWriter  ;
27 import java.io.PrintWriter ;
28 import java.io.UnsupportedEncodingException ;
29 import java.io.Writer ;
30
31 import org.w3c.dom.Attr ;
32 import org.w3c.dom.Document ;
33 import org.w3c.dom.NamedNodeMap ;
34 import org.w3c.dom.Node ;
35 import org.w3c.dom.NodeList ;
36
37 public class DOMWriter {
38
39
43
44 private static String
45 PRINTWRITER_ENCODING = "UTF8";
46
47 private static String MIME2JAVA_ENCODINGS[] =
48 { "Default", "UTF-8", "US-ASCII", "ISO-8859-1", "ISO-8859-2", "ISO-8859-3", "ISO-8859-4",
49 "ISO-8859-5", "ISO-8859-6", "ISO-8859-7", "ISO-8859-8", "ISO-8859-9", "ISO-2022-JP",
50 "SHIFT_JIS", "EUC-JP","GB2312", "BIG5", "EUC-KR", "ISO-2022-KR", "KOI8-R", "EBCDIC-CP-US",
51 "EBCDIC-CP-CA", "EBCDIC-CP-NL", "EBCDIC-CP-DK", "EBCDIC-CP-NO", "EBCDIC-CP-FI", "EBCDIC-CP-SE",
52 "EBCDIC-CP-IT", "EBCDIC-CP-ES", "EBCDIC-CP-GB", "EBCDIC-CP-FR", "EBCDIC-CP-AR1",
53 "EBCDIC-CP-HE", "EBCDIC-CP-CH", "EBCDIC-CP-ROECE","EBCDIC-CP-YU",
54 "EBCDIC-CP-IS", "EBCDIC-CP-AR2", "UTF-16"
55 };
56
57
58
59 protected PrintWriter out;
60
61
62 protected boolean canonical;
63
64
65 public DOMWriter(String encoding, boolean canonical)
66 throws UnsupportedEncodingException {
67 out = new PrintWriter (new OutputStreamWriter (System.out, encoding));
68 this.canonical = canonical;
69 }
71
75
76 public DOMWriter(boolean canonical) throws UnsupportedEncodingException {
77 this( getWriterEncoding(), canonical);
78 }
79
80 public DOMWriter(Writer writer, boolean canonical) {
81 out = new PrintWriter (writer);
82 this.canonical = canonical;
83 }
84
85 public static String getWriterEncoding( ) {
86 return (PRINTWRITER_ENCODING);
87 }
89 public static void setWriterEncoding( String encoding ) {
90 if( encoding.equalsIgnoreCase( "DEFAULT" ) )
91 PRINTWRITER_ENCODING = "UTF8";
92 else if( encoding.equalsIgnoreCase( "UTF-16" ) )
93 PRINTWRITER_ENCODING = "Unicode";
94 else
95 PRINTWRITER_ENCODING = MIME2Java.convert( encoding );
96 }
98
99 public static boolean isValidJavaEncoding( String encoding ) {
100 for ( int i = 0; i < MIME2JAVA_ENCODINGS.length; i++ )
101 if ( encoding.equals( MIME2JAVA_ENCODINGS[i] ) )
102 return (true);
103
104 return (false);
105 }
107
108
109 public void print(Node node) {
110
111 if ( node == null ) {
113 return;
114 }
115
116 int type = node.getNodeType();
117 switch ( type ) {
118 case Node.DOCUMENT_NODE: {
120 if ( !canonical ) {
121 String Encoding = getWriterEncoding();
122 if( Encoding.equalsIgnoreCase( "DEFAULT" ) )
123 Encoding = "UTF-8";
124 else if( Encoding.equalsIgnoreCase( "Unicode" ) )
125 Encoding = "UTF-16";
126 else
127 Encoding = MIME2Java.reverse( Encoding );
128
129 out.println("<?xml version=\"1.0\" encoding=\""+
130 Encoding + "\"?>");
131 }
132 print(((Document )node).getDocumentElement());
133 out.flush();
134 break;
135 }
136
137 case Node.ELEMENT_NODE: {
139 out.print('<');
140 out.print(node.getNodeName());
141 Attr attrs[] = sortAttributes(node.getAttributes());
142 for ( int i = 0; i < attrs.length; i++ ) {
143 Attr attr = attrs[i];
144 out.print(' ');
145 out.print(attr.getNodeName());
146 out.print("=\"");
147 out.print(normalize(attr.getNodeValue()));
148 out.print('"');
149 }
150 out.print('>');
151 NodeList children = node.getChildNodes();
152 if ( children != null ) {
153 int len = children.getLength();
154 for ( int i = 0; i < len; i++ ) {
155 print(children.item(i));
156 }
157 }
158 break;
159 }
160
161 case Node.ENTITY_REFERENCE_NODE: {
163 if ( canonical ) {
164 NodeList children = node.getChildNodes();
165 if ( children != null ) {
166 int len = children.getLength();
167 for ( int i = 0; i < len; i++ ) {
168 print(children.item(i));
169 }
170 }
171 } else {
172 out.print('&');
173 out.print(node.getNodeName());
174 out.print(';');
175 }
176 break;
177 }
178
179 case Node.CDATA_SECTION_NODE: {
181 if ( canonical ) {
182 out.print(normalize(node.getNodeValue()));
183 } else {
184 out.print("<![CDATA[");
185 out.print(node.getNodeValue());
186 out.print("]]>");
187 }
188 break;
189 }
190
191 case Node.TEXT_NODE: {
193 out.print(normalize(node.getNodeValue()));
194 break;
195 }
196
197 case Node.PROCESSING_INSTRUCTION_NODE: {
199 out.print("<?");
200 out.print(node.getNodeName());
201 String data = node.getNodeValue();
202 if ( data != null && data.length() > 0 ) {
203 out.print(' ');
204 out.print(data);
205 }
206 out.print("?>");
207 break;
208 }
209 }
210
211 if ( type == Node.ELEMENT_NODE ) {
212 out.print("</");
213 out.print(node.getNodeName());
214 out.print('>');
215 }
216
217 out.flush();
218
219 }
221
222 protected Attr [] sortAttributes(NamedNodeMap attrs) {
223
224 int len = (attrs != null) ? attrs.getLength() : 0;
225 Attr array[] = new Attr [len];
226 for ( int i = 0; i < len; i++ ) {
227 array[i] = (Attr )attrs.item(i);
228 }
229 for ( int i = 0; i < len - 1; i++ ) {
230 String name = array[i].getNodeName();
231 int index = i;
232 for ( int j = i + 1; j < len; j++ ) {
233 String curName = array[j].getNodeName();
234 if ( curName.compareTo(name) < 0 ) {
235 name = curName;
236 index = j;
237 }
238 }
239 if ( index != i ) {
240 Attr temp = array[i];
241 array[i] = array[index];
242 array[index] = temp;
243 }
244 }
245
246 return (array);
247
248 }
250
251
252 protected String normalize(String s) {
253 StringBuffer str = new StringBuffer ();
254
255 int len = (s != null) ? s.length() : 0;
256 for ( int i = 0; i < len; i++ ) {
257 char ch = s.charAt(i);
258 switch ( ch ) {
259 case '<': {
260 str.append("<");
261 break;
262 }
263 case '>': {
264 str.append(">");
265 break;
266 }
267 case '&': {
268 str.append("&");
269 break;
270 }
271 case '"': {
272 str.append(""");
273 break;
274 }
275 case '\r':
276 case '\n': {
277 if ( canonical ) {
278 str.append("&#");
279 str.append(Integer.toString(ch));
280 str.append(';');
281 break;
282 }
283 }
285 default: {
286 str.append(ch);
287 }
288 }
289 }
290
291 return (str.toString());
292
293 }
295 }
296 |
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