Repository navigation
Expand file tree
/
Copy pathJSONArray.java
More file actions
1521 lines (1431 loc) · 50.3 KB
/
Copy pathJSONArray.java
File metadata and controls
1521 lines (1431 loc) · 50.3 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
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
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.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
/**
* A JSONArray is an ordered sequence of values. Its external text form is a
* string wrapped in square brackets with commas separating the values. The
* internal form is an object having <code>get</code> and <code>opt</code>
* methods for accessing the values by index, and <code>put</code> methods for
* adding or replacing values. The values can be any of these types:
* <code>Boolean</code>, <code>JSONArray</code>, <code>JSONObject</code>,
* <code>Number</code>, <code>String</code>, or the
* <code>JSONObject.NULL object</code>.
* <p>
* The constructor can convert a JSON text into a Java object. The
* <code>toString</code> method converts to JSON text.
* <p>
* A <code>get</code> method returns a value if one can be found, and throws an
* exception if one cannot be found. An <code>opt</code> method returns a
* default value instead of throwing an exception, and so is useful for
* obtaining optional values.
* <p>
* The generic <code>get()</code> and <code>opt()</code> methods return an
* object which you can cast or query for type. There are also typed
* <code>get</code> and <code>opt</code> methods that do type checking and type
* coercion for you.
* <p>
* The texts produced by the <code>toString</code> methods strictly conform to
* JSON syntax rules. The constructors are more forgiving in the texts they will
* accept:
* <ul>
* <li>An extra <code>,</code> <small>(comma)</small> may appear just
* before the closing bracket.</li>
* <li>The <code>null</code> value will be inserted when there is <code>,</code>
* <small>(comma)</small> elision.</li>
* <li>Strings may be quoted with <code>'</code> <small>(single
* quote)</small>.</li>
* <li>Strings do not need to be quoted at all if they do not begin with a quote
* or single quote, and if they do not contain leading or trailing spaces, and
* if they do not contain any of these characters:
* <code>{ } [ ] / \ : , #</code> and if they do not look like numbers and
* if they are not the reserved words <code>true</code>, <code>false</code>, or
* <code>null</code>.</li>
* </ul>
*
* @author JSON.org
* @version 2016-08/15
*/
public class JSONArray implements Iterable<Object> {
/**
* The arrayList where the JSONArray's properties are kept.
*/
private final ArrayList<Object> myArrayList;
/**
* Construct an empty JSONArray.
*/
public JSONArray() {
this.myArrayList = new ArrayList<Object>();
}
/**
* Construct a JSONArray from a JSONTokener.
*
* @param x
* A JSONTokener
* @throws JSONException
* If there is a syntax error.
*/
public JSONArray(JSONTokener x) throws JSONException {
this();
if (x.nextClean() != '[') {
throw x.syntaxError("A JSONArray text must start with '['");
}
char nextChar = x.nextClean();
if (nextChar == 0) {
// array is unclosed. No ']' found, instead EOF
throw x.syntaxError("Expected a ',' or ']'");
}
if (nextChar != ']') {
x.back();
for (;;) {
if (x.nextClean() == ',') {
x.back();
this.myArrayList.add(JSONObject.NULL);
} else {
x.back();
this.myArrayList.add(x.nextValue());
}
switch (x.nextClean()) {
case 0:
// array is unclosed. No ']' found, instead EOF
throw x.syntaxError("Expected a ',' or ']'");
case ',':
nextChar = x.nextClean();
if (nextChar == 0) {
// array is unclosed. No ']' found, instead EOF
throw x.syntaxError("Expected a ',' or ']'");
}
if (nextChar == ']') {
return;
}
x.back();
break;
case ']':
return;
default:
throw x.syntaxError("Expected a ',' or ']'");
}
}
}
}
/**
* Construct a JSONArray from a source JSON text.
*
* @param source
* A string that begins with <code>[</code> <small>(left
* bracket)</small> and ends with <code>]</code>
* <small>(right bracket)</small>.
* @throws JSONException
* If there is a syntax error.
*/
public JSONArray(String source) throws JSONException {
this(new JSONTokener(source));
}
/**
* Construct a JSONArray from a Collection.
*
* @param collection
* A Collection.
*/
public JSONArray(Collection<?> collection) {
if (collection == null) {
this.myArrayList = new ArrayList<Object>();
} else {
this.myArrayList = new ArrayList<Object>(collection.size());
for (Object o: collection){
this.myArrayList.add(JSONObject.wrap(o));
}
}
}
/**
* Construct a JSONArray from an array.
*
* @param array
* Array. If the parameter passed is null, or not an array, an
* exception will be thrown.
*
* @throws JSONException
* If not an array or if an array value is non-finite number.
* @throws NullPointerException
* Thrown if the array parameter is null.
*/
public JSONArray(Object array) throws JSONException {
this();
if (array.getClass().isArray()) {
int length = Array.getLength(array);
this.myArrayList.ensureCapacity(length);
for (int i = 0; i < length; i += 1) {
this.put(JSONObject.wrap(Array.get(array, i)));
}
} else {
throw new JSONException(
"JSONArray initial value should be a string or collection or array.");
}
}
@Override
public Iterator<Object> iterator() {
return this.myArrayList.iterator();
}
/**
* Get the object value associated with an index.
*
* @param index
* The index must be between 0 and length() - 1.
* @return An object value.
* @throws JSONException
* If there is no value for the index.
*/
public Object get(int index) throws JSONException {
Object object = this.opt(index);
if (object == null) {
throw new JSONException("JSONArray[" + index + "] not found.");
}
return object;
}
/**
* Get the boolean value associated with an index. The string values "true"
* and "false" are converted to boolean.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The truth.
* @throws JSONException
* If there is no value for the index or if the value is not
* convertible to boolean.
*/
public boolean getBoolean(int index) throws JSONException {
Object object = this.get(index);
if (object.equals(Boolean.FALSE)
|| (object instanceof String && ((String) object)
.equalsIgnoreCase("false"))) {
return false;
} else if (object.equals(Boolean.TRUE)
|| (object instanceof String && ((String) object)
.equalsIgnoreCase("true"))) {
return true;
}
throw wrongValueFormatException(index, "boolean", null);
}
/**
* Get the double value associated with an index.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The value.
* @throws JSONException
* If the key is not found or if the value cannot be converted
* to a number.
*/
public double getDouble(int index) throws JSONException {
final Object object = this.get(index);
if(object instanceof Number) {
return ((Number)object).doubleValue();
}
try {
return Double.parseDouble(object.toString());
} catch (Exception e) {
throw wrongValueFormatException(index, "double", e);
}
}
/**
* Get the float value associated with a key.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The numeric value.
* @throws JSONException
* if the key is not found or if the value is not a Number
* object and cannot be converted to a number.
*/
public float getFloat(int index) throws JSONException {
final Object object = this.get(index);
if(object instanceof Number) {
return ((Float)object).floatValue();
}
try {
return Float.parseFloat(object.toString());
} catch (Exception e) {
throw wrongValueFormatException(index, "float", e);
}
}
/**
* Get the Number value associated with a key.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The numeric value.
* @throws JSONException
* if the key is not found or if the value is not a Number
* object and cannot be converted to a number.
*/
public Number getNumber(int index) throws JSONException {
Object object = this.get(index);
try {
if (object instanceof Number) {
return (Number)object;
}
return JSONObject.stringToNumber(object.toString());
} catch (Exception e) {
throw wrongValueFormatException(index, "number", e);
}
}
/**
* Get the enum value associated with an index.
*
* @param <E>
* Enum Type
* @param clazz
* The type of enum to retrieve.
* @param index
* The index must be between 0 and length() - 1.
* @return The enum value at the index location
* @throws JSONException
* if the key is not found or if the value cannot be converted
* to an enum.
*/
public <E extends Enum<E>> E getEnum(Class<E> clazz, int index) throws JSONException {
E val = optEnum(clazz, index);
if(val==null) {
// JSONException should really take a throwable argument.
// If it did, I would re-implement this with the Enum.valueOf
// method and place any thrown exception in the JSONException
throw wrongValueFormatException(index, "enum of type "
+ JSONObject.quote(clazz.getSimpleName()), null);
}
return val;
}
/**
* Get the BigDecimal value associated with an index. If the value is float
* or double, the the {@link BigDecimal#BigDecimal(double)} constructor
* will be used. See notes on the constructor for conversion issues that
* may arise.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The value.
* @throws JSONException
* If the key is not found or if the value cannot be converted
* to a BigDecimal.
*/
public BigDecimal getBigDecimal (int index) throws JSONException {
Object object = this.get(index);
BigDecimal val = JSONObject.objectToBigDecimal(object, null);
if(val == null) {
throw wrongValueFormatException(index, "BigDecimal", object, null);
}
return val;
}
/**
* Get the BigInteger value associated with an index.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The value.
* @throws JSONException
* If the key is not found or if the value cannot be converted
* to a BigInteger.
*/
public BigInteger getBigInteger (int index) throws JSONException {
Object object = this.get(index);
BigInteger val = JSONObject.objectToBigInteger(object, null);
if(val == null) {
throw wrongValueFormatException(index, "BigInteger", object, null);
}
return val;
}
/**
* Get the int value associated with an index.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The value.
* @throws JSONException
* If the key is not found or if the value is not a number.
*/
public int getInt(int index) throws JSONException {
final Object object = this.get(index);
if(object instanceof Number) {
return ((Number)object).intValue();
}
try {
return Integer.parseInt(object.toString());
} catch (Exception e) {
throw wrongValueFormatException(index, "int", e);
}
}
/**
* Get the JSONArray associated with an index.
*
* @param index
* The index must be between 0 and length() - 1.
* @return A JSONArray value.
* @throws JSONException
* If there is no value for the index. or if the value is not a
* JSONArray
*/
public JSONArray getJSONArray(int index) throws JSONException {
Object object = this.get(index);
if (object instanceof JSONArray) {
return (JSONArray) object;
}
throw wrongValueFormatException(index, "JSONArray", null);
}
/**
* Get the JSONObject associated with an index.
*
* @param index
* subscript
* @return A JSONObject value.
* @throws JSONException
* If there is no value for the index or if the value is not a
* JSONObject
*/
public JSONObject getJSONObject(int index) throws JSONException {
Object object = this.get(index);
if (object instanceof JSONObject) {
return (JSONObject) object;
}
throw wrongValueFormatException(index, "JSONObject", null);
}
/**
* Get the long value associated with an index.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The value.
* @throws JSONException
* If the key is not found or if the value cannot be converted
* to a number.
*/
public long getLong(int index) throws JSONException {
final Object object = this.get(index);
if(object instanceof Number) {
return ((Number)object).longValue();
}
try {
return Long.parseLong(object.toString());
} catch (Exception e) {
throw wrongValueFormatException(index, "long", e);
}
}
/**
* Get the string associated with an index.
*
* @param index
* The index must be between 0 and length() - 1.
* @return A string value.
* @throws JSONException
* If there is no string value for the index.
*/
public String getString(int index) throws JSONException {
Object object = this.get(index);
if (object instanceof String) {
return (String) object;
}
throw wrongValueFormatException(index, "String", null);
}
/**
* Determine if the value is <code>null</code>.
*
* @param index
* The index must be between 0 and length() - 1.
* @return true if the value at the index is <code>null</code>, or if there is no value.
*/
public boolean isNull(int index) {
return JSONObject.NULL.equals(this.opt(index));
}
/**
* Make a string from the contents of this JSONArray. The
* <code>separator</code> string is inserted between each element. Warning:
* This method assumes that the data structure is acyclical.
*
* @param separator
* A string that will be inserted between the elements.
* @return a string.
* @throws JSONException
* If the array contains an invalid number.
*/
public String join(String separator) throws JSONException {
int len = this.length();
if (len == 0) {
return "";
}
StringBuilder sb = new StringBuilder(
JSONObject.valueToString(this.myArrayList.get(0)));
for (int i = 1; i < len; i++) {
sb.append(separator)
.append(JSONObject.valueToString(this.myArrayList.get(i)));
}
return sb.toString();
}
/**
* Get the number of elements in the JSONArray, included nulls.
*
* @return The length (or size).
*/
public int length() {
return this.myArrayList.size();
}
/**
* Get the optional object value associated with an index.
*
* @param index
* The index must be between 0 and length() - 1. If not, null is returned.
* @return An object value, or null if there is no object at that index.
*/
public Object opt(int index) {
return (index < 0 || index >= this.length()) ? null : this.myArrayList
.get(index);
}
/**
* Get the optional boolean value associated with an index. It returns false
* if there is no value at that index, or if the value is not Boolean.TRUE
* or the String "true".
*
* @param index
* The index must be between 0 and length() - 1.
* @return The truth.
*/
public boolean optBoolean(int index) {
return this.optBoolean(index, false);
}
/**
* Get the optional boolean value associated with an index. It returns the
* defaultValue if there is no value at that index or if it is not a Boolean
* or the String "true" or "false" (case insensitive).
*
* @param index
* The index must be between 0 and length() - 1.
* @param defaultValue
* A boolean default.
* @return The truth.
*/
public boolean optBoolean(int index, boolean defaultValue) {
try {
return this.getBoolean(index);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Get the optional double value associated with an index. NaN is returned
* if there is no value for the index, or if the value is not a number and
* cannot be converted to a number.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The value.
*/
public double optDouble(int index) {
return this.optDouble(index, Double.NaN);
}
/**
* Get the optional double value associated with an index. The defaultValue
* is returned if there is no value for the index, or if the value is not a
* number and cannot be converted to a number.
*
* @param index
* subscript
* @param defaultValue
* The default value.
* @return The value.
*/
public double optDouble(int index, double defaultValue) {
final Number val = this.optNumber(index, null);
if (val == null) {
return defaultValue;
}
final double doubleValue = val.doubleValue();
// if (Double.isNaN(doubleValue) || Double.isInfinite(doubleValue)) {
// return defaultValue;
// }
return doubleValue;
}
/**
* Get the optional float value associated with an index. NaN is returned
* if there is no value for the index, or if the value is not a number and
* cannot be converted to a number.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The value.
*/
public float optFloat(int index) {
return this.optFloat(index, Float.NaN);
}
/**
* Get the optional float value associated with an index. The defaultValue
* is returned if there is no value for the index, or if the value is not a
* number and cannot be converted to a number.
*
* @param index
* subscript
* @param defaultValue
* The default value.
* @return The value.
*/
public float optFloat(int index, float defaultValue) {
final Number val = this.optNumber(index, null);
if (val == null) {
return defaultValue;
}
final float floatValue = val.floatValue();
// if (Float.isNaN(floatValue) || Float.isInfinite(floatValue)) {
// return floatValue;
// }
return floatValue;
}
/**
* Get the optional int value associated with an index. Zero is returned if
* there is no value for the index, or if the value is not a number and
* cannot be converted to a number.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The value.
*/
public int optInt(int index) {
return this.optInt(index, 0);
}
/**
* Get the optional int value associated with an index. The defaultValue is
* returned if there is no value for the index, or if the value is not a
* number and cannot be converted to a number.
*
* @param index
* The index must be between 0 and length() - 1.
* @param defaultValue
* The default value.
* @return The value.
*/
public int optInt(int index, int defaultValue) {
final Number val = this.optNumber(index, null);
if (val == null) {
return defaultValue;
}
return val.intValue();
}
/**
* Get the enum value associated with a key.
*
* @param <E>
* Enum Type
* @param clazz
* The type of enum to retrieve.
* @param index
* The index must be between 0 and length() - 1.
* @return The enum value at the index location or null if not found
*/
public <E extends Enum<E>> E optEnum(Class<E> clazz, int index) {
return this.optEnum(clazz, index, null);
}
/**
* Get the enum value associated with a key.
*
* @param <E>
* Enum Type
* @param clazz
* The type of enum to retrieve.
* @param index
* The index must be between 0 and length() - 1.
* @param defaultValue
* The default in case the value is not found
* @return The enum value at the index location or defaultValue if
* the value is not found or cannot be assigned to clazz
*/
public <E extends Enum<E>> E optEnum(Class<E> clazz, int index, E defaultValue) {
try {
Object val = this.opt(index);
if (JSONObject.NULL.equals(val)) {
return defaultValue;
}
if (clazz.isAssignableFrom(val.getClass())) {
// we just checked it!
@SuppressWarnings("unchecked")
E myE = (E) val;
return myE;
}
return Enum.valueOf(clazz, val.toString());
} catch (IllegalArgumentException e) {
return defaultValue;
} catch (NullPointerException e) {
return defaultValue;
}
}
/**
* Get the optional BigInteger value associated with an index. The
* defaultValue is returned if there is no value for the index, or if the
* value is not a number and cannot be converted to a number.
*
* @param index
* The index must be between 0 and length() - 1.
* @param defaultValue
* The default value.
* @return The value.
*/
public BigInteger optBigInteger(int index, BigInteger defaultValue) {
Object val = this.opt(index);
return JSONObject.objectToBigInteger(val, defaultValue);
}
/**
* Get the optional BigDecimal value associated with an index. The
* defaultValue is returned if there is no value for the index, or if the
* value is not a number and cannot be converted to a number. If the value
* is float or double, the the {@link BigDecimal#BigDecimal(double)}
* constructor will be used. See notes on the constructor for conversion
* issues that may arise.
*
* @param index
* The index must be between 0 and length() - 1.
* @param defaultValue
* The default value.
* @return The value.
*/
public BigDecimal optBigDecimal(int index, BigDecimal defaultValue) {
Object val = this.opt(index);
return JSONObject.objectToBigDecimal(val, defaultValue);
}
/**
* Get the optional JSONArray associated with an index.
*
* @param index
* subscript
* @return A JSONArray value, or null if the index has no value, or if the
* value is not a JSONArray.
*/
public JSONArray optJSONArray(int index) {
Object o = this.opt(index);
return o instanceof JSONArray ? (JSONArray) o : null;
}
/**
* Get the optional JSONObject associated with an index. Null is returned if
* the key is not found, or null if the index has no value, or if the value
* is not a JSONObject.
*
* @param index
* The index must be between 0 and length() - 1.
* @return A JSONObject value.
*/
public JSONObject optJSONObject(int index) {
Object o = this.opt(index);
return o instanceof JSONObject ? (JSONObject) o : null;
}
/**
* Get the optional long value associated with an index. Zero is returned if
* there is no value for the index, or if the value is not a number and
* cannot be converted to a number.
*
* @param index
* The index must be between 0 and length() - 1.
* @return The value.
*/
public long optLong(int index) {
return this.optLong(index, 0);
}
/**
* Get the optional long value associated with an index. The defaultValue is
* returned if there is no value for the index, or if the value is not a
* number and cannot be converted to a number.
*
* @param index
* The index must be between 0 and length() - 1.
* @param defaultValue
* The default value.
* @return The value.
*/
public long optLong(int index, long defaultValue) {
final Number val = this.optNumber(index, null);
if (val == null) {
return defaultValue;
}
return val.longValue();
}
/**
* Get an optional {@link Number} value associated with a key, or <code>null</code>
* if there is no such key or if the value is not a number. If the value is a string,
* an attempt will be made to evaluate it as a number ({@link BigDecimal}). This method
* would be used in cases where type coercion of the number value is unwanted.
*
* @param index
* The index must be between 0 and length() - 1.
* @return An object which is the value.
*/
public Number optNumber(int index) {
return this.optNumber(index, null);
}
/**
* Get an optional {@link Number} value associated with a key, or the default if there
* is no such key or if the value is not a number. If the value is a string,
* an attempt will be made to evaluate it as a number ({@link BigDecimal}). This method
* would be used in cases where type coercion of the number value is unwanted.
*
* @param index
* The index must be between 0 and length() - 1.
* @param defaultValue
* The default.
* @return An object which is the value.
*/
public Number optNumber(int index, Number defaultValue) {
Object val = this.opt(index);
if (JSONObject.NULL.equals(val)) {
return defaultValue;
}
if (val instanceof Number){
return (Number) val;
}
if (val instanceof String) {
try {
return JSONObject.stringToNumber((String) val);
} catch (Exception e) {
return defaultValue;
}
}
return defaultValue;
}
/**
* Get the optional string value associated with an index. It returns an
* empty string if there is no value at that index. If the value is not a
* string and is not null, then it is converted to a string.
*
* @param index
* The index must be between 0 and length() - 1.
* @return A String value.
*/
public String optString(int index) {
return this.optString(index, "");
}
/**
* Get the optional string associated with an index. The defaultValue is
* returned if the key is not found.
*
* @param index
* The index must be between 0 and length() - 1.
* @param defaultValue
* The default value.
* @return A String value.
*/
public String optString(int index, String defaultValue) {
Object object = this.opt(index);
return JSONObject.NULL.equals(object) ? defaultValue : object
.toString();
}
/**
* Append a boolean value. This increases the array's length by one.
*
* @param value
* A boolean value.
* @return this.
*/
public JSONArray put(boolean value) {
return this.put(value ? Boolean.TRUE : Boolean.FALSE);
}
/**
* Put a value in the JSONArray, where the value will be a JSONArray which
* is produced from a Collection.
*
* @param value
* A Collection value.
* @return this.
* @throws JSONException
* If the value is non-finite number.
*/
public JSONArray put(Collection<?> value) {
return this.put(new JSONArray(value));
}
/**
* Append a double value. This increases the array's length by one.
*
* @param value
* A double value.
* @return this.
* @throws JSONException
* if the value is not finite.
*/
public JSONArray put(double value) throws JSONException {
return this.put(Double.valueOf(value));
}
/**
* Append a float value. This increases the array's length by one.
*
* @param value
* A float value.
* @return this.
* @throws JSONException
* if the value is not finite.
*/
public JSONArray put(float value) throws JSONException {
return this.put(Float.valueOf(value));
}
/**
* Append an int value. This increases the array's length by one.
*
* @param value
* An int value.
* @return this.
*/
public JSONArray put(int value) {
return this.put(Integer.valueOf(value));
}
/**
* Append an long value. This increases the array's length by one.
*
* @param value
* A long value.
* @return this.
*/
public JSONArray put(long value) {
return this.put(Long.valueOf(value));
}
/**
* Put a value in the JSONArray, where the value will be a JSONObject which
* is produced from a Map.
*
* @param value
* A Map value.
* @return this.
* @throws JSONException
* If a value in the map is non-finite number.
* @throws NullPointerException
* If a key in the map is <code>null</code>
*/
public JSONArray put(Map<?, ?> value) {
return this.put(new JSONObject(value));
}
/**
* Append an object value. This increases the array's length by one.
*
* @param value
* An object value. The value should be a Boolean, Double,
* Integer, JSONArray, JSONObject, Long, or String, or the
* JSONObject.NULL object.
* @return this.
* @throws JSONException
* If the value is non-finite number.
*/
public JSONArray put(Object value) {
JSONObject.testValidity(value);
this.myArrayList.add(value);
return this;
}