forked from stleary/JSON-java
-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathXML.java
More file actions
453 lines (395 loc) · 14.9 KB
/
XML.java
File metadata and controls
453 lines (395 loc) · 14.9 KB
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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
package org.json;
/*
Copyright (c) 2002 JSON.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
The Software shall be used for Good, not Evil.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
import java.util.Iterator;
/**
* This provides static methods to convert an XML text into a JSONObject,
* and to covert a JSONObject into an XML text.
* @author JSON.org
* @version 2014-05-03
*/
public class XML {
/** The Character '&'. */
public static final Character AMP = '&';
/** The Character '''. */
public static final Character APOS = '\'';
/** The Character '!'. */
public static final Character BANG = '!';
/** The Character '='. */
public static final Character EQ = '=';
/** The Character '>'. */
public static final Character GT = '>';
/** The Character '<'. */
public static final Character LT = '<';
/** The Character '?'. */
public static final Character QUEST = '?';
/** The Character '"'. */
public static final Character QUOT = '"';
/** The Character '/'. */
public static final Character SLASH = '/';
/**
* Replace special characters with XML escapes:
* <pre>
* & <small>(ampersand)</small> is replaced by &amp;
* < <small>(less than)</small> is replaced by &lt;
* > <small>(greater than)</small> is replaced by &gt;
* " <small>(double quote)</small> is replaced by &quot;
* </pre>
* @param string The string to be escaped.
* @return The escaped string.
*/
public static String escape(String string) {
StringBuilder sb = new StringBuilder(string.length());
for (int i = 0, length = string.length(); i < length; i++) {
char c = string.charAt(i);
switch (c) {
case '&':
sb.append("&");
break;
case '<':
sb.append("<");
break;
case '>':
sb.append(">");
break;
case '"':
sb.append(""");
break;
case '\'':
sb.append("'");
break;
default:
sb.append(c);
}
}
return sb.toString();
}
/**
* Throw an exception if the string contains whitespace.
* Whitespace is not allowed in tagNames and attributes.
* @param string A string.
* @throws JSONException
*/
public static void noSpace(String string) throws JSONException {
int i, length = string.length();
if (length == 0) {
throw new JSONException("Empty string.");
}
for (i = 0; i < length; i += 1) {
if (Character.isWhitespace(string.charAt(i))) {
throw new JSONException("'" + string +
"' contains a space character.");
}
}
}
/**
* Scan the content following the named tag, attaching it to the context.
* @param x The XMLTokener containing the source string.
* @param context The JSONObject that will include the new material.
* @param name The tag name.
* @return true if the close tag is processed.
* @throws JSONException
*/
private static boolean parse(XMLTokener x, JSONObject context,
String name) throws JSONException {
char c;
int i;
JSONObject jsonobject = null;
String string;
String tagName;
Object token;
// Test for and skip past these forms:
// <!-- ... -->
// <! ... >
// <![ ... ]]>
// <? ... ?>
// Report errors for these forms:
// <>
// <=
// <<
token = x.nextToken();
// <!
if (token == BANG) {
c = x.next();
if (c == '-') {
if (x.next() == '-') {
x.skipPast("-->");
return false;
}
x.back();
} else if (c == '[') {
token = x.nextToken();
if ("CDATA".equals(token)) {
if (x.next() == '[') {
string = x.nextCDATA();
if (string.length() > 0) {
context.accumulate("content", string);
}
return false;
}
}
throw x.syntaxError("Expected 'CDATA['");
}
i = 1;
do {
token = x.nextMeta();
if (token == null) {
throw x.syntaxError("Missing '>' after '<!'.");
} else if (token == LT) {
i += 1;
} else if (token == GT) {
i -= 1;
}
} while (i > 0);
return false;
} else if (token == QUEST) {
// <?
x.skipPast("?>");
return false;
} else if (token == SLASH) {
// Close tag </
token = x.nextToken();
if (name == null) {
throw x.syntaxError("Mismatched close tag " + token);
}
if (!token.equals(name)) {
throw x.syntaxError("Mismatched " + name + " and " + token);
}
if (x.nextToken() != GT) {
throw x.syntaxError("Misshaped close tag");
}
return true;
} else if (token instanceof Character) {
throw x.syntaxError("Misshaped tag");
// Open tag <
} else {
tagName = (String)token;
token = null;
jsonobject = new JSONObject();
for (;;) {
if (token == null) {
token = x.nextToken();
}
// attribute = value
if (token instanceof String) {
string = (String)token;
token = x.nextToken();
if (token == EQ) {
token = x.nextToken();
if (!(token instanceof String)) {
throw x.syntaxError("Missing value");
}
jsonobject.accumulate(string,
XML.stringToValue((String)token));
token = null;
} else {
jsonobject.accumulate(string, "");
}
// Empty tag <.../>
} else if (token == SLASH) {
if (x.nextToken() != GT) {
throw x.syntaxError("Misshaped tag");
}
if (jsonobject.length() > 0) {
context.accumulate(tagName, jsonobject);
} else {
context.accumulate(tagName, "");
}
return false;
// Content, between <...> and </...>
} else if (token == GT) {
for (;;) {
token = x.nextContent();
if (token == null) {
if (tagName != null) {
throw x.syntaxError("Unclosed tag " + tagName);
}
return false;
} else if (token instanceof String) {
string = (String)token;
if (string.length() > 0) {
jsonobject.accumulate("content",
XML.stringToValue(string));
}
// Nested element
} else if (token == LT) {
if (parse(x, jsonobject, tagName)) {
if (jsonobject.length() == 0) {
context.accumulate(tagName, "");
} else if (jsonobject.length() == 1 &&
jsonobject.opt("content") != null) {
context.accumulate(tagName,
jsonobject.opt("content"));
} else {
context.accumulate(tagName, jsonobject);
}
return false;
}
}
}
} else {
throw x.syntaxError("Misshaped tag");
}
}
}
}
/**
* Try to convert a string into a number, boolean, or null. If the string
* can't be converted, return the string. This is much less ambitious than
* JSONObject.stringToValue, especially because it does not attempt to
* convert plus forms, octal forms, hex forms, or E forms lacking decimal
* points.
* @param string A String.
* @return A simple JSON value.
*/
public static Object stringToValue(String string) {
if ("true".equalsIgnoreCase(string)) {
return Boolean.TRUE;
}
if ("false".equalsIgnoreCase(string)) {
return Boolean.FALSE;
}
if ("null".equalsIgnoreCase(string)) {
return JSONObject.NULL;
}
return string;
}
/**
* Convert a well-formed (but not necessarily valid) XML string into a
* JSONObject. Some information may be lost in this transformation
* because JSON is a data format and XML is a document format. XML uses
* elements, attributes, and content text, while JSON uses unordered
* collections of name/value pairs and arrays of values. JSON does not
* does not like to distinguish between elements and attributes.
* Sequences of similar elements are represented as JSONArrays. Content
* text may be placed in a "content" member. Comments, prologs, DTDs, and
* <code><[ [ ]]></code> are ignored.
* @param string The source string.
* @return A JSONObject containing the structured data from the XML string.
* @throws JSONException
*/
public static JSONObject toJSONObject(String string) throws JSONException {
JSONObject jo = new JSONObject();
XMLTokener x = new XMLTokener(string);
while (x.more() && x.skipPast("<")) {
parse(x, jo, null);
}
return jo;
}
/**
* Convert a JSONObject into a well-formed, element-normal XML string.
* @param object A JSONObject.
* @return A string.
* @throws JSONException
*/
public static String toString(Object object) throws JSONException {
return toString(object, null);
}
/**
* Convert a JSONObject into a well-formed, element-normal XML string.
* @param object A JSONObject.
* @param tagName The optional name of the enclosing tag.
* @return A string.
* @throws JSONException
*/
public static String toString(Object object, String tagName)
throws JSONException {
StringBuilder sb = new StringBuilder();
int i;
JSONArray ja;
JSONObject jo;
String key;
Iterator<String> keys;
int length;
String string;
Object value;
if (object instanceof JSONObject) {
// Emit <tagName>
if (tagName != null) {
sb.append('<');
sb.append(tagName);
sb.append('>');
}
// Loop thru the keys.
jo = (JSONObject)object;
keys = jo.keys();
while (keys.hasNext()) {
key = keys.next();
value = jo.opt(key);
if (value == null) {
value = "";
}
string = value instanceof String ? (String)value : null;
// Emit an array of similar keys
if (value instanceof JSONArray) {
ja = (JSONArray)value;
length = ja.length();
for (i = 0; i < length; i += 1) {
value = ja.get(i);
if (value instanceof JSONArray) {
sb.append('<');
sb.append(key);
sb.append('>');
sb.append(toString(value));
sb.append("</");
sb.append(key);
sb.append('>');
} else {
sb.append(toString(value, key));
}
}
} else if ("".equals(value)) {
sb.append('<');
sb.append(key);
sb.append("/>");
// Emit a new tag <k>
} else {
sb.append(toString(value, key));
}
}
if (tagName != null) {
// Emit the </tagname> close tag
sb.append("</");
sb.append(tagName);
sb.append('>');
}
return sb.toString();
// XML does not have good support for arrays. If an array appears in a place
// where XML is lacking, synthesize an <array> element.
} else {
if (object.getClass().isArray()) {
object = new JSONArray(object);
}
if (object instanceof JSONArray) {
ja = (JSONArray)object;
length = ja.length();
for (i = 0; i < length; i += 1) {
sb.append(toString(ja.opt(i), tagName == null ? "array" : tagName));
}
return sb.toString();
} else {
string = (object == null) ? "null" : escape(object.toString());
return (tagName == null) ? "\"" + string + "\"" :
(string.length() == 0) ? "<" + tagName + "/>" :
"<" + tagName + ">" + string + "</" + tagName + ">";
}
}
}
}