1. Project Clover database Fri Dec 6 2024 13:47:14 GMT
  2. Package org.json

File XML.java

 

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Classes

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XML 39 234 105
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1    package org.json;
2   
3    /*
4    Copyright (c) 2015 JSON.org
5   
6    Permission is hereby granted, free of charge, to any person obtaining a copy
7    of this software and associated documentation files (the "Software"), to deal
8    in the Software without restriction, including without limitation the rights
9    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10    copies of the Software, and to permit persons to whom the Software is
11    furnished to do so, subject to the following conditions:
12   
13    The above copyright notice and this permission notice shall be included in all
14    copies or substantial portions of the Software.
15   
16    The Software shall be used for Good, not Evil.
17   
18    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24    SOFTWARE.
25    */
26   
27    import java.io.Reader;
28    import java.io.StringReader;
29    import java.util.Iterator;
30   
31    /**
32    * This provides static methods to convert an XML text into a JSONObject, and to
33    * covert a JSONObject into an XML text.
34    *
35    * @author JSON.org
36    * @version 2016-08-10
37    */
38    @SuppressWarnings("boxing")
 
39    public class XML
40    {
41    /** The Character '&'. */
42    public static final Character AMP = '&';
43   
44    /** The Character '''. */
45    public static final Character APOS = '\'';
46   
47    /** The Character '!'. */
48    public static final Character BANG = '!';
49   
50    /** The Character '='. */
51    public static final Character EQ = '=';
52   
53    /** The Character '>'. */
54    public static final Character GT = '>';
55   
56    /** The Character '<'. */
57    public static final Character LT = '<';
58   
59    /** The Character '?'. */
60    public static final Character QUEST = '?';
61   
62    /** The Character '"'. */
63    public static final Character QUOT = '"';
64   
65    /** The Character '/'. */
66    public static final Character SLASH = '/';
67   
68    /**
69    * Creates an iterator for navigating Code Points in a string instead of
70    * characters. Once Java7 support is dropped, this can be replaced with <code>
71    * string.codePoints()
72    * </code> which is available in Java8 and above.
73    *
74    * @see <a href=
75    * "http://stackoverflow.com/a/21791059/6030888">http://stackoverflow.com/a/21791059/6030888</a>
76    */
 
77  0 toggle private static Iterable<Integer> codePointIterator(final String string)
78    {
79  0 return new Iterable<Integer>()
80    {
 
81  0 toggle @Override
82    public Iterator<Integer> iterator()
83    {
84  0 return new Iterator<Integer>()
85    {
86    private int nextIndex = 0;
87   
88    private int length = string.length();
89   
 
90  0 toggle @Override
91    public boolean hasNext()
92    {
93  0 return this.nextIndex < this.length;
94    }
95   
 
96  0 toggle @Override
97    public Integer next()
98    {
99  0 int result = string.codePointAt(this.nextIndex);
100  0 this.nextIndex += Character.charCount(result);
101  0 return result;
102    }
103   
 
104  0 toggle @Override
105    public void remove()
106    {
107  0 throw new UnsupportedOperationException();
108    }
109    };
110    }
111    };
112    }
113   
114    /**
115    * Replace special characters with XML escapes:
116    *
117    * <pre>
118    * &amp; <small>(ampersand)</small> is replaced by &amp;amp;
119    * &lt; <small>(less than)</small> is replaced by &amp;lt;
120    * &gt; <small>(greater than)</small> is replaced by &amp;gt;
121    * &quot; <small>(double quote)</small> is replaced by &amp;quot;
122    * &apos; <small>(single quote / apostrophe)</small> is replaced by &amp;apos;
123    * </pre>
124    *
125    * @param string
126    * The string to be escaped.
127    * @return The escaped string.
128    */
 
129  0 toggle public static String escape(String string)
130    {
131  0 StringBuilder sb = new StringBuilder(string.length());
132  0 for (final int cp : codePointIterator(string))
133    {
134  0 switch (cp)
135    {
136  0 case '&':
137  0 sb.append("&amp;");
138  0 break;
139  0 case '<':
140  0 sb.append("&lt;");
141  0 break;
142  0 case '>':
143  0 sb.append("&gt;");
144  0 break;
145  0 case '"':
146  0 sb.append("&quot;");
147  0 break;
148  0 case '\'':
149  0 sb.append("&apos;");
150  0 break;
151  0 default:
152  0 if (mustEscape(cp))
153    {
154  0 sb.append("&#x");
155  0 sb.append(Integer.toHexString(cp));
156  0 sb.append(';');
157    }
158    else
159    {
160  0 sb.appendCodePoint(cp);
161    }
162    }
163    }
164  0 return sb.toString();
165    }
166   
167    /**
168    * @param cp
169    * code point to test
170    * @return true if the code point is not valid for an XML
171    */
 
172  0 toggle private static boolean mustEscape(int cp)
173    {
174    /* Valid range from https://www.w3.org/TR/REC-xml/#charsets
175    *
176    * #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
177    *
178    * any Unicode character, excluding the surrogate blocks, FFFE, and FFFF.
179    */
180    // isISOControl is true when (cp >= 0 && cp <= 0x1F) || (cp >= 0x7F && cp <=
181    // 0x9F)
182    // all ISO control characters are out of range except tabs and new lines
183  0 return (Character.isISOControl(cp) && cp != 0x9 && cp != 0xA
184    && cp != 0xD) || !(
185    // valid the range of acceptable characters that aren't control
186    (cp >= 0x20 && cp <= 0xD7FF) || (cp >= 0xE000 && cp <= 0xFFFD)
187    || (cp >= 0x10000 && cp <= 0x10FFFF));
188    }
189   
190    /**
191    * Removes XML escapes from the string.
192    *
193    * @param string
194    * string to remove escapes from
195    * @return string with converted entities
196    */
 
197  0 toggle public static String unescape(String string)
198    {
199  0 StringBuilder sb = new StringBuilder(string.length());
200  0 for (int i = 0, length = string.length(); i < length; i++)
201    {
202  0 char c = string.charAt(i);
203  0 if (c == '&')
204    {
205  0 final int semic = string.indexOf(';', i);
206  0 if (semic > i)
207    {
208  0 final String entity = string.substring(i + 1, semic);
209  0 sb.append(XMLTokener.unescapeEntity(entity));
210    // skip past the entity we just parsed.
211  0 i += entity.length() + 1;
212    }
213    else
214    {
215    // this shouldn't happen in most cases since the parser
216    // errors on unclosed entries.
217  0 sb.append(c);
218    }
219    }
220    else
221    {
222    // not part of an entity
223  0 sb.append(c);
224    }
225    }
226  0 return sb.toString();
227    }
228   
229    /**
230    * Throw an exception if the string contains whitespace. Whitespace is not
231    * allowed in tagNames and attributes.
232    *
233    * @param string
234    * A string.
235    * @throws JSONException
236    * Thrown if the string contains whitespace or is empty.
237    */
 
238  0 toggle public static void noSpace(String string) throws JSONException
239    {
240  0 int i, length = string.length();
241  0 if (length == 0)
242    {
243  0 throw new JSONException("Empty string.");
244    }
245  0 for (i = 0; i < length; i += 1)
246    {
247  0 if (Character.isWhitespace(string.charAt(i)))
248    {
249  0 throw new JSONException(
250    "'" + string + "' contains a space character.");
251    }
252    }
253    }
254   
255    /**
256    * Scan the content following the named tag, attaching it to the context.
257    *
258    * @param x
259    * The XMLTokener containing the source string.
260    * @param context
261    * The JSONObject that will include the new material.
262    * @param name
263    * The tag name.
264    * @return true if the close tag is processed.
265    * @throws JSONException
266    */
 
267  0 toggle private static boolean parse(XMLTokener x, JSONObject context,
268    String name, boolean keepStrings) throws JSONException
269    {
270  0 char c;
271  0 int i;
272  0 JSONObject jsonobject = null;
273  0 String string;
274  0 String tagName;
275  0 Object token;
276   
277    // Test for and skip past these forms:
278    // <!-- ... -->
279    // <! ... >
280    // <![ ... ]]>
281    // <? ... ?>
282    // Report errors for these forms:
283    // <>
284    // <=
285    // <<
286   
287  0 token = x.nextToken();
288   
289    // <!
290   
291  0 if (token == BANG)
292    {
293  0 c = x.next();
294  0 if (c == '-')
295    {
296  0 if (x.next() == '-')
297    {
298  0 x.skipPast("-->");
299  0 return false;
300    }
301  0 x.back();
302    }
303  0 else if (c == '[')
304    {
305  0 token = x.nextToken();
306  0 if ("CDATA".equals(token))
307    {
308  0 if (x.next() == '[')
309    {
310  0 string = x.nextCDATA();
311  0 if (string.length() > 0)
312    {
313  0 context.accumulate("content", string);
314    }
315  0 return false;
316    }
317    }
318  0 throw x.syntaxError("Expected 'CDATA['");
319    }
320  0 i = 1;
321  0 do
322    {
323  0 token = x.nextMeta();
324  0 if (token == null)
325    {
326  0 throw x.syntaxError("Missing '>' after '<!'.");
327    }
328  0 else if (token == LT)
329    {
330  0 i += 1;
331    }
332  0 else if (token == GT)
333    {
334  0 i -= 1;
335    }
336  0 } while (i > 0);
337  0 return false;
338    }
339  0 else if (token == QUEST)
340    {
341   
342    // <?
343  0 x.skipPast("?>");
344  0 return false;
345    }
346  0 else if (token == SLASH)
347    {
348   
349    // Close tag </
350   
351  0 token = x.nextToken();
352  0 if (name == null)
353    {
354  0 throw x.syntaxError("Mismatched close tag " + token);
355    }
356  0 if (!token.equals(name))
357    {
358  0 throw x.syntaxError("Mismatched " + name + " and " + token);
359    }
360  0 if (x.nextToken() != GT)
361    {
362  0 throw x.syntaxError("Misshaped close tag");
363    }
364  0 return true;
365   
366    }
367  0 else if (token instanceof Character)
368    {
369  0 throw x.syntaxError("Misshaped tag");
370   
371    // Open tag <
372   
373    }
374    else
375    {
376  0 tagName = (String) token;
377  0 token = null;
378  0 jsonobject = new JSONObject();
379  0 for (;;)
380    {
381  0 if (token == null)
382    {
383  0 token = x.nextToken();
384    }
385    // attribute = value
386  0 if (token instanceof String)
387    {
388  0 string = (String) token;
389  0 token = x.nextToken();
390  0 if (token == EQ)
391    {
392  0 token = x.nextToken();
393  0 if (!(token instanceof String))
394    {
395  0 throw x.syntaxError("Missing value");
396    }
397  0 jsonobject.accumulate(string, keepStrings ? ((String) token)
398    : stringToValue((String) token));
399  0 token = null;
400    }
401    else
402    {
403  0 jsonobject.accumulate(string, "");
404    }
405   
406    }
407  0 else if (token == SLASH)
408    {
409    // Empty tag <.../>
410  0 if (x.nextToken() != GT)
411    {
412  0 throw x.syntaxError("Misshaped tag");
413    }
414  0 if (jsonobject.length() > 0)
415    {
416  0 context.accumulate(tagName, jsonobject);
417    }
418    else
419    {
420  0 context.accumulate(tagName, "");
421    }
422  0 return false;
423   
424    }
425  0 else if (token == GT)
426    {
427    // Content, between <...> and </...>
428  0 for (;;)
429    {
430  0 token = x.nextContent();
431  0 if (token == null)
432    {
433  0 if (tagName != null)
434    {
435  0 throw x.syntaxError("Unclosed tag " + tagName);
436    }
437  0 return false;
438    }
439  0 else if (token instanceof String)
440    {
441  0 string = (String) token;
442  0 if (string.length() > 0)
443    {
444  0 jsonobject.accumulate("content",
445  0 keepStrings ? string : stringToValue(string));
446    }
447   
448    }
449  0 else if (token == LT)
450    {
451    // Nested element
452  0 if (parse(x, jsonobject, tagName, keepStrings))
453    {
454  0 if (jsonobject.length() == 0)
455    {
456  0 context.accumulate(tagName, "");
457    }
458  0 else if (jsonobject.length() == 1
459    && jsonobject.opt("content") != null)
460    {
461  0 context.accumulate(tagName, jsonobject.opt("content"));
462    }
463    else
464    {
465  0 context.accumulate(tagName, jsonobject);
466    }
467  0 return false;
468    }
469    }
470    }
471    }
472    else
473    {
474  0 throw x.syntaxError("Misshaped tag");
475    }
476    }
477    }
478    }
479   
480    /**
481    * This method is the same as {@link JSONObject#stringToValue(String)}.
482    *
483    * @param string
484    * String to convert
485    * @return JSON value of this string or the string
486    */
487    // To maintain compatibility with the Android API, this method is a direct
488    // copy of
489    // the one in JSONObject. Changes made here should be reflected there.
 
490  0 toggle public static Object stringToValue(String string)
491    {
492  0 if (string.equals(""))
493    {
494  0 return string;
495    }
496  0 if (string.equalsIgnoreCase("true"))
497    {
498  0 return Boolean.TRUE;
499    }
500  0 if (string.equalsIgnoreCase("false"))
501    {
502  0 return Boolean.FALSE;
503    }
504  0 if (string.equalsIgnoreCase("null"))
505    {
506  0 return JSONObject.NULL;
507    }
508   
509    /*
510    * If it might be a number, try converting it. If a number cannot be
511    * produced, then the value will just be a string.
512    */
513   
514  0 char initial = string.charAt(0);
515  0 if ((initial >= '0' && initial <= '9') || initial == '-')
516    {
517  0 try
518    {
519    // if we want full Big Number support this block can be replaced with:
520    // return stringToNumber(string);
521  0 if (string.indexOf('.') > -1 || string.indexOf('e') > -1
522    || string.indexOf('E') > -1 || "-0".equals(string))
523    {
524  0 Double d = Double.valueOf(string);
525  0 if (!d.isInfinite() && !d.isNaN())
526    {
527  0 return d;
528    }
529    }
530    else
531    {
532  0 Long myLong = Long.valueOf(string);
533  0 if (string.equals(myLong.toString()))
534    {
535  0 if (myLong.longValue() == myLong.intValue())
536    {
537  0 return Integer.valueOf(myLong.intValue());
538    }
539  0 return myLong;
540    }
541    }
542    } catch (Exception ignore)
543    {
544    }
545    }
546  0 return string;
547    }
548   
549    /**
550    * Convert a well-formed (but not necessarily valid) XML string into a
551    * JSONObject. Some information may be lost in this transformation because
552    * JSON is a data format and XML is a document format. XML uses elements,
553    * attributes, and content text, while JSON uses unordered collections of
554    * name/value pairs and arrays of values. JSON does not does not like to
555    * distinguish between elements and attributes. Sequences of similar elements
556    * are represented as JSONArrays. Content text may be placed in a "content"
557    * member. Comments, prologs, DTDs, and <code>&lt;[ [ ]]></code> are ignored.
558    *
559    * @param string
560    * The source string.
561    * @return A JSONObject containing the structured data from the XML string.
562    * @throws JSONException
563    * Thrown if there is an errors while parsing the string
564    */
 
565  0 toggle public static JSONObject toJSONObject(String string) throws JSONException
566    {
567  0 return toJSONObject(string, false);
568    }
569   
570    /**
571    * Convert a well-formed (but not necessarily valid) XML into a JSONObject.
572    * Some information may be lost in this transformation because JSON is a data
573    * format and XML is a document format. XML uses elements, attributes, and
574    * content text, while JSON uses unordered collections of name/value pairs and
575    * arrays of values. JSON does not does not like to distinguish between
576    * elements and attributes. Sequences of similar elements are represented as
577    * JSONArrays. Content text may be placed in a "content" member. Comments,
578    * prologs, DTDs, and <code>&lt;[ [ ]]></code> are ignored.
579    *
580    * @param reader
581    * The XML source reader.
582    * @return A JSONObject containing the structured data from the XML string.
583    * @throws JSONException
584    * Thrown if there is an errors while parsing the string
585    */
 
586  0 toggle public static JSONObject toJSONObject(Reader reader) throws JSONException
587    {
588  0 return toJSONObject(reader, false);
589    }
590   
591    /**
592    * Convert a well-formed (but not necessarily valid) XML into a JSONObject.
593    * Some information may be lost in this transformation because JSON is a data
594    * format and XML is a document format. XML uses elements, attributes, and
595    * content text, while JSON uses unordered collections of name/value pairs and
596    * arrays of values. JSON does not does not like to distinguish between
597    * elements and attributes. Sequences of similar elements are represented as
598    * JSONArrays. Content text may be placed in a "content" member. Comments,
599    * prologs, DTDs, and <code>&lt;[ [ ]]></code> are ignored.
600    *
601    * All values are converted as strings, for 1, 01, 29.0 will not be coerced to
602    * numbers but will instead be the exact value as seen in the XML document.
603    *
604    * @param reader
605    * The XML source reader.
606    * @param keepStrings
607    * If true, then values will not be coerced into boolean or numeric
608    * values and will instead be left as strings
609    * @return A JSONObject containing the structured data from the XML string.
610    * @throws JSONException
611    * Thrown if there is an errors while parsing the string
612    */
 
613  0 toggle public static JSONObject toJSONObject(Reader reader, boolean keepStrings)
614    throws JSONException
615    {
616  0 JSONObject jo = new JSONObject();
617  0 XMLTokener x = new XMLTokener(reader);
618  0 while (x.more())
619    {
620  0 x.skipPast("<");
621  0 if (x.more())
622    {
623  0 parse(x, jo, null, keepStrings);
624    }
625    }
626  0 return jo;
627    }
628   
629    /**
630    * Convert a well-formed (but not necessarily valid) XML string into a
631    * JSONObject. Some information may be lost in this transformation because
632    * JSON is a data format and XML is a document format. XML uses elements,
633    * attributes, and content text, while JSON uses unordered collections of
634    * name/value pairs and arrays of values. JSON does not does not like to
635    * distinguish between elements and attributes. Sequences of similar elements
636    * are represented as JSONArrays. Content text may be placed in a "content"
637    * member. Comments, prologs, DTDs, and <code>&lt;[ [ ]]></code> are ignored.
638    *
639    * All values are converted as strings, for 1, 01, 29.0 will not be coerced to
640    * numbers but will instead be the exact value as seen in the XML document.
641    *
642    * @param string
643    * The source string.
644    * @param keepStrings
645    * If true, then values will not be coerced into boolean or numeric
646    * values and will instead be left as strings
647    * @return A JSONObject containing the structured data from the XML string.
648    * @throws JSONException
649    * Thrown if there is an errors while parsing the string
650    */
 
651  0 toggle public static JSONObject toJSONObject(String string, boolean keepStrings)
652    throws JSONException
653    {
654  0 return toJSONObject(new StringReader(string), keepStrings);
655    }
656   
657    /**
658    * Convert a JSONObject into a well-formed, element-normal XML string.
659    *
660    * @param object
661    * A JSONObject.
662    * @return A string.
663    * @throws JSONException
664    * Thrown if there is an error parsing the string
665    */
 
666  0 toggle public static String toString(Object object) throws JSONException
667    {
668  0 return toString(object, null);
669    }
670   
671    /**
672    * Convert a JSONObject into a well-formed, element-normal XML string.
673    *
674    * @param object
675    * A JSONObject.
676    * @param tagName
677    * The optional name of the enclosing tag.
678    * @return A string.
679    * @throws JSONException
680    * Thrown if there is an error parsing the string
681    */
 
682  0 toggle public static String toString(final Object object, final String tagName)
683    throws JSONException
684    {
685  0 StringBuilder sb = new StringBuilder();
686  0 JSONArray ja;
687  0 JSONObject jo;
688  0 String string;
689   
690  0 if (object instanceof JSONObject)
691    {
692   
693    // Emit <tagName>
694  0 if (tagName != null)
695    {
696  0 sb.append('<');
697  0 sb.append(tagName);
698  0 sb.append('>');
699    }
700   
701    // Loop thru the keys.
702    // don't use the new entrySet accessor to maintain Android Support
703  0 jo = (JSONObject) object;
704  0 for (final String key : jo.keySet())
705    {
706  0 Object value = jo.opt(key);
707  0 if (value == null)
708    {
709  0 value = "";
710    }
711  0 else if (value.getClass().isArray())
712    {
713  0 value = new JSONArray(value);
714    }
715   
716    // Emit content in body
717  0 if ("content".equals(key))
718    {
719  0 if (value instanceof JSONArray)
720    {
721  0 ja = (JSONArray) value;
722  0 int jaLength = ja.length();
723    // don't use the new iterator API to maintain support for Android
724  0 for (int i = 0; i < jaLength; i++)
725    {
726  0 if (i > 0)
727    {
728  0 sb.append('\n');
729    }
730  0 Object val = ja.opt(i);
731  0 sb.append(escape(val.toString()));
732    }
733    }
734    else
735    {
736  0 sb.append(escape(value.toString()));
737    }
738   
739    // Emit an array of similar keys
740   
741    }
742  0 else if (value instanceof JSONArray)
743    {
744  0 ja = (JSONArray) value;
745  0 int jaLength = ja.length();
746    // don't use the new iterator API to maintain support for Android
747  0 for (int i = 0; i < jaLength; i++)
748    {
749  0 Object val = ja.opt(i);
750  0 if (val instanceof JSONArray)
751    {
752  0 sb.append('<');
753  0 sb.append(key);
754  0 sb.append('>');
755  0 sb.append(toString(val));
756  0 sb.append("</");
757  0 sb.append(key);
758  0 sb.append('>');
759    }
760    else
761    {
762  0 sb.append(toString(val, key));
763    }
764    }
765    }
766  0 else if ("".equals(value))
767    {
768  0 sb.append('<');
769  0 sb.append(key);
770  0 sb.append("/>");
771   
772    // Emit a new tag <k>
773   
774    }
775    else
776    {
777  0 sb.append(toString(value, key));
778    }
779    }
780  0 if (tagName != null)
781    {
782   
783    // Emit the </tagname> close tag
784  0 sb.append("</");
785  0 sb.append(tagName);
786  0 sb.append('>');
787    }
788  0 return sb.toString();
789   
790    }
791   
792  0 if (object != null
793    && (object instanceof JSONArray || object.getClass().isArray()))
794    {
795  0 if (object.getClass().isArray())
796    {
797  0 ja = new JSONArray(object);
798    }
799    else
800    {
801  0 ja = (JSONArray) object;
802    }
803  0 int jaLength = ja.length();
804    // don't use the new iterator API to maintain support for Android
805  0 for (int i = 0; i < jaLength; i++)
806    {
807  0 Object val = ja.opt(i);
808    // XML does not have good support for arrays. If an array
809    // appears in a place where XML is lacking, synthesize an
810    // <array> element.
811  0 sb.append(toString(val, tagName == null ? "array" : tagName));
812    }
813  0 return sb.toString();
814    }
815   
816  0 string = (object == null) ? "null" : escape(object.toString());
817  0 return (tagName == null) ? "\"" + string + "\""
818  0 : (string.length() == 0) ? "<" + tagName + "/>"
819    : "<" + tagName + ">" + string + "</" + tagName + ">";
820   
821    }
822    }