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GeezerVison is showing github.com — JSON-java/JSONObject.java at master · tediscript/JSON-java Expand file tree/ Copy pathJSONObject.javaMore file actions executable file ·1620 lines (1459 loc) · 54.4 KB / Copy pathJSONObject.javaFile metadata and controlsexecutable file ·1620 lines (1459 loc) · 54.4 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.Writer; import java.lang.reflect.Field; import java.lang.reflect.Modifier; import java.lang.reflect.Method; import java.util.Collection; import java.util.Enumeration; import java.util.HashMap; import java.util.Iterator; import java.util.Locale; import java.util.Map; import java.util.ResourceBundle; /** * A JSONObject is an unordered collection of name/value pairs. Its * external form is a string wrapped in curly braces with colons between the * names and values, and commas between the values and names. The internal form * is an object having <code>get</code> and <code>opt</code> methods for * accessing the values by name, and <code>put</code> methods for adding or * replacing values by name. 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</code> * object. A JSONObject constructor can be used to convert an external form * JSON text into an internal form whose values can be retrieved with the * <code>get</code> and <code>opt</code> methods, or to convert values into a * JSON text using the <code>put</code> and <code>toString</code> methods. * 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. The opt methods differ from the get methods in that they * do not throw. Instead, they return a specified value, such as null. * <p> * The <code>put</code> methods add or replace values in an object. For example, * <pre>myString = new JSONObject().put("JSON", "Hello, World!").toString();</pre> * produces the string <code>{"JSON": "Hello, World"}</code>. * <p> * The texts produced by the <code>toString</code> methods strictly conform to * the 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 brace.</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> * <li>Keys can be followed by <code>=</code> or <code>=></code> as well as * by <code>:</code>.</li> * <li>Values can be followed by <code>;</code> <small>(semicolon)</small> as * well as by <code>,</code> <small>(comma)</small>.</li> * <li>Numbers may have the <code>0x-</code> <small>(hex)</small> prefix.</li> * </ul> * @author JSON.org * @version 2011-01-31 */ public class JSONObject { /** * JSONObject.NULL is equivalent to the value that JavaScript calls null, * whilst Java's null is equivalent to the value that JavaScript calls * undefined. */ private static final class Null { /** * There is only intended to be a single instance of the NULL object, * so the clone method returns itself. * @return NULL. */ protected final Object clone() { return this; } /** * A Null object is equal to the null value and to itself. * @param object An object to test for nullness. * @return true if the object parameter is the JSONObject.NULL object * or null. */ public boolean equals(Object object) { return object == null || object == this; } /** * Get the "null" string value. * @return The string "null". */ public String toString() { return "null"; } } /** * The map where the JSONObject's properties are kept. */ private Map map; /** * It is sometimes more convenient and less ambiguous to have a * <code>NULL</code> object than to use Java's <code>null</code> value. * <code>JSONObject.NULL.equals(null)</code> returns <code>true</code>. * <code>JSONObject.NULL.toString()</code> returns <code>"null"</code>. */ public static final Object NULL = new Null(); /** * Construct an empty JSONObject. */ public JSONObject() { this.map = new HashMap(); } /** * Construct a JSONObject from a subset of another JSONObject. * An array of strings is used to identify the keys that should be copied. * Missing keys are ignored. * @param jo A JSONObject. * @param names An array of strings. * @throws JSONException * @exception JSONException If a value is a non-finite number or if a name is duplicated. */ public JSONObject(JSONObject jo, String[] names) { this(); for (int i = 0; i < names.length; i += 1) { try { putOnce(names[i], jo.opt(names[i])); } catch (Exception ignore) { } } } /** * Construct a JSONObject from a JSONTokener. * @param x A JSONTokener object containing the source string. * @throws JSONException If there is a syntax error in the source string * or a duplicated key. */ public JSONObject(JSONTokener x) throws JSONException { this(); char c; String key; if (x.nextClean() != '{') { throw x.syntaxError("A JSONObject text must begin with '{'"); } for (;;) { c = x.nextClean(); switch (c) { case 0: throw x.syntaxError("A JSONObject text must end with '}'"); case '}': return; default: x.back(); key = x.nextValue().toString(); } // The key is followed by ':'. We will also tolerate '=' or '=>'. c = x.nextClean(); if (c == '=') { if (x.next() != '>') { x.back(); } } else if (c != ':') { throw x.syntaxError("Expected a ':' after a key"); } putOnce(key, x.nextValue()); // Pairs are separated by ','. We will also tolerate ';'. switch (x.nextClean()) { case ';': case ',': if (x.nextClean() == '}') { return; } x.back(); break; case '}': return; default: throw x.syntaxError("Expected a ',' or '}'"); } } } /** * Construct a JSONObject from a Map. * * @param map A map object that can be used to initialize the contents of * the JSONObject. * @throws JSONException */ public JSONObject(Map map) { this.map = new HashMap(); if (map != null) { Iterator i = map.entrySet().iterator(); while (i.hasNext()) { Map.Entry e = (Map.Entry)i.next(); Object value = e.getValue(); if (value != null) { this.map.put(e.getKey(), wrap(value)); } } } } /** * Construct a JSONObject from an Object using bean getters. * It reflects on all of the public methods of the object. * For each of the methods with no parameters and a name starting * with <code>"get"</code> or <code>"is"</code> followed by an uppercase letter, * the method is invoked, and a key and the value returned from the getter method * are put into the new JSONObject. * * The key is formed by removing the <code>"get"</code> or <code>"is"</code> prefix. * If the second remaining character is not upper case, then the first * character is converted to lower case. * * For example, if an object has a method named <code>"getName"</code>, and * if the result of calling <code>object.getName()</code> is <code>"Larry Fine"</code>, * then the JSONObject will contain <code>"name": "Larry Fine"</code>. * * @param bean An object that has getter methods that should be used * to make a JSONObject. */ public JSONObject(Object bean) { this(); populateMap(bean); } /** * Construct a JSONObject from an Object, using reflection to find the * public members. The resulting JSONObject's keys will be the strings * from the names array, and the values will be the field values associated * with those keys in the object. If a key is not found or not visible, * then it will not be copied into the new JSONObject. * @param object An object that has fields that should be used to make a * JSONObject. * @param names An array of strings, the names of the fields to be obtained * from the object. */ public JSONObject(Object object, String names[]) { this(); Class c = object.getClass(); for (int i = 0; i < names.length; i += 1) { String name = names[i]; try { putOpt(name, c.getField(name).get(object)); } catch (Exception ignore) { } } } /** * Construct a JSONObject from a source JSON text string. * This is the most commonly used JSONObject constructor. * @param source A string beginning * with <code>{</code> <small>(left brace)</small> and ending * with <code>}</code> <small>(right brace)</small>. * @exception JSONException If there is a syntax error in the source * string or a duplicated key. */ public JSONObject(String source) throws JSONException { this(new JSONTokener(source)); } /** * Construct a JSONObject from a ResourceBundle. * @param baseName The ResourceBundle base name. * @param locale The Locale to load the ResourceBundle for. * @throws JSONException If any JSONExceptions are detected. */ public JSONObject(String baseName, Locale locale) throws JSONException { this(); ResourceBundle bundle = ResourceBundle.getBundle(baseName, locale, Thread.currentThread().getContextClassLoader()); // Iterate through the keys in the bundle. Enumeration keys = bundle.getKeys(); while (keys.hasMoreElements()) { Object key = keys.nextElement(); if (key instanceof String) { // Go through the path, ensuring that there is a nested JSONObject for each // segment except the last. Add the value using the last segment's name into // the deepest nested JSONObject. String[] path = ((String)key).split("\\."); int last = path.length - 1; JSONObject target = this; for (int i = 0; i < last; i += 1) { String segment = path[i]; JSONObject nextTarget = target.optJSONObject(segment); if (nextTarget == null) { nextTarget = new JSONObject(); target.put(segment, nextTarget); } target = nextTarget; } target.put(path[last], bundle.getString((String)key)); } } } /** * Accumulate values under a key. It is similar to the put method except * that if there is already an object stored under the key then a * JSONArray is stored under the key to hold all of the accumulated values. * If there is already a JSONArray, then the new value is appended to it. * In contrast, the put method replaces the previous value. * * If only one value is accumulated that is not a JSONArray, then the * result will be the same as using put. But if multiple values are * accumulated, then the result will be like append. * @param key A key string. * @param value An object to be accumulated under the key. * @return this. * @throws JSONException If the value is an invalid number * or if the key is null. */ public JSONObject accumulate(String key, Object value) throws JSONException { testValidity(value); Object object = opt(key); if (object == null) { put(key, value instanceof JSONArray ? new JSONArray().put(value) : value); } else if (object instanceof JSONArray) { ((JSONArray)object).put(value); } else { put(key, new JSONArray().put(object).put(value)); } return this; } /** * Append values to the array under a key. If the key does not exist in the * JSONObject, then the key is put in the JSONObject with its value being a * JSONArray containing the value parameter. If the key was already * associated with a JSONArray, then the value parameter is appended to it. * @param key A key string. * @param value An object to be accumulated under the key. * @return this. * @throws JSONException If the key is null or if the current value * associated with the key is not a JSONArray. */ public JSONObject append(String key, Object value) throws JSONException { testValidity(value); Object object = opt(key); if (object == null) { put(key, new JSONArray().put(value)); } else if (object instanceof JSONArray) { put(key, ((JSONArray)object).put(value)); } else { throw new JSONException("JSONObject[" + key + "] is not a JSONArray."); } return this; } /** * Produce a string from a double. The string "null" will be returned if * the number is not finite. * @param d A double. * @return A String. */ public static String doubleToString(double d) { if (Double.isInfinite(d) || Double.isNaN(d)) { return "null"; } // Shave off trailing zeros and decimal point, if possible. String string = Double.toString(d); if (string.indexOf('.') > 0 && string.indexOf('e') < 0 && string.indexOf('E') < 0) { while (string.endsWith("0")) { string = string.substring(0, string.length() - 1); } if (string.endsWith(".")) { string = string.substring(0, string.length() - 1); } } return string; } /** * Get the value object associated with a key. * * @param key A key string. * @return The object associated with the key. * @throws JSONException if the key is not found. */ public Object get(String key) throws JSONException { if (key == null) { throw new JSONException("Null key."); } Object object = opt(key); if (object == null) { throw new JSONException("JSONObject[" + quote(key) + "] not found."); } return object; } /** * Get the boolean value associated with a key. * * @param key A key string. * @return The truth. * @throws JSONException * if the value is not a Boolean or the String "true" or "false". */ public boolean getBoolean(String key) throws JSONException { Object object = get(key); 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 new JSONException("JSONObject[" + quote(key) + "] is not a Boolean."); } /** * Get the double value associated with a key. * @param key A key string. * @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 double getDouble(String key) throws JSONException { Object object = get(key); try { return object instanceof Number ? ((Number)object).doubleValue() : Double.parseDouble((String)object); } catch (Exception e) { throw new JSONException("JSONObject[" + quote(key) + "] is not a number."); } } /** * Get the int value associated with a key. * * @param key A key string. * @return The integer value. * @throws JSONException if the key is not found or if the value cannot * be converted to an integer. */ public int getInt(String key) throws JSONException { Object object = get(key); try { return object instanceof Number ? ((Number)object).intValue() : Integer.parseInt((String)object); } catch (Exception e) { throw new JSONException("JSONObject[" + quote(key) + "] is not an int."); } } /** * Get the JSONArray value associated with a key. * * @param key A key string. * @return A JSONArray which is the value. * @throws JSONException if the key is not found or * if the value is not a JSONArray. */ public JSONArray getJSONArray(String key) throws JSONException { Object object = get(key); if (object instanceof JSONArray) { return (JSONArray)object; } throw new JSONException("JSONObject[" + quote(key) + "] is not a JSONArray."); } /** * Get the JSONObject value associated with a key. * * @param key A key string. * @return A JSONObject which is the value. * @throws JSONException if the key is not found or * if the value is not a JSONObject. */ public JSONObject getJSONObject(String key) throws JSONException { Object object = get(key); if (object instanceof JSONObject) { return (JSONObject)object; } throw new JSONException("JSONObject[" + quote(key) + "] is not a JSONObject."); } /** * Get the long value associated with a key. * * @param key A key string. * @return The long value. * @throws JSONException if the key is not found or if the value cannot * be converted to a long. */ public long getLong(String key) throws JSONException { Object object = get(key); try { return object instanceof Number ? ((Number)object).longValue() : Long.parseLong((String)object); } catch (Exception e) { throw new JSONException("JSONObject[" + quote(key) + "] is not a long."); } } /** * Get an array of field names from a JSONObject. * * @return An array of field names, or null if there are no names. */ public static String[] getNames(JSONObject jo) { int length = jo.length(); if (length == 0) { return null; } Iterator iterator = jo.keys(); String[] names = new String[length]; int i = 0; while (iterator.hasNext()) { names[i] = (String)iterator.next(); i += 1; } return names; } /** * Get an array of field names from an Object. * * @return An array of field names, or null if there are no names. */ public static String[] getNames(Object object) { if (object == null) { return null; } Class klass = object.getClass(); Field[] fields = klass.getFields(); int length = fields.length; if (length == 0) { return null; } String[] names = new String[length]; for (int i = 0; i < length; i += 1) { names[i] = fields[i].getName(); } return names; } /** * Get the string associated with a key. * * @param key A key string. * @return A string which is the value. * @throws JSONException if the key is not found. */ public String getString(String key) throws JSONException { Object object = get(key); return object == NULL ? null : object.toString(); } /** * Determine if the JSONObject contains a specific key. * @param key A key string. * @return true if the key exists in the JSONObject. */ public boolean has(String key) { return this.map.containsKey(key); } /** * Increment a property of a JSONObject. If there is no such property, * create one with a value of 1. If there is such a property, and if * it is an Integer, Long, Double, or Float, then add one to it. * @param key A key string. * @return this. * @throws JSONException If there is already a property with this name * that is not an Integer, Long, Double, or Float. */ public JSONObject increment(String key) throws JSONException { Object value = opt(key); if (value == null) { put(key, 1); } else if (value instanceof Integer) { put(key, ((Integer)value).intValue() + 1); } else if (value instanceof Long) { put(key, ((Long)value).longValue() + 1); } else if (value instanceof Double) { put(key, ((Double)value).doubleValue() + 1); } else if (value instanceof Float) { put(key, ((Float)value).floatValue() + 1); } else { throw new JSONException("Unable to increment [" + quote(key) + "]."); } return this; } /** * Determine if the value associated with the key is null or if there is * no value. * @param key A key string. * @return true if there is no value associated with the key or if * the value is the JSONObject.NULL object. */ public boolean isNull(String key) { return JSONObject.NULL.equals(opt(key)); } /** * Get an enumeration of the keys of the JSONObject. * * @return An iterator of the keys. */ public Iterator keys() { return this.map.keySet().iterator(); } /** * Get the number of keys stored in the JSONObject. * * @return The number of keys in the JSONObject. */ public int length() { return this.map.size(); } /** * Produce a JSONArray containing the names of the elements of this * JSONObject. * @return A JSONArray containing the key strings, or null if the JSONObject * is empty. */ public JSONArray names() { JSONArray ja = new JSONArray(); Iterator keys = this.keys(); while (keys.hasNext()) { ja.put(keys.next()); } return ja.length() == 0 ? null : ja; } /** * Produce a string from a Number. * @param number A Number * @return A String. * @throws JSONException If n is a non-finite number. */ public static String numberToString(Number number) throws JSONException { if (number == null) { throw new JSONException("Null pointer"); } testValidity(number); // Shave off trailing zeros and decimal point, if possible. String string = number.toString(); if (string.indexOf('.') > 0 && string.indexOf('e') < 0 && string.indexOf('E') < 0) { while (string.endsWith("0")) { string = string.substring(0, string.length() - 1); } if (string.endsWith(".")) { string = string.substring(0, string.length() - 1); } } return string; } /** * Get an optional value associated with a key. * @param key A key string. * @return An object which is the value, or null if there is no value. */ public Object opt(String key) { return key == null ? null : this.map.get(key); } /** * Get an optional boolean associated with a key. * It returns false if there is no such key, or if the value is not * Boolean.TRUE or the String "true". * * @param key A key string. * @return The truth. */ public boolean optBoolean(String key) { return optBoolean(key, false); } /** * Get an optional boolean associated with a key. * It returns the defaultValue if there is no such key, or if it is not * a Boolean or the String "true" or "false" (case insensitive). * * @param key A key string. * @param defaultValue The default. * @return The truth. */ public boolean optBoolean(String key, boolean defaultValue) { try { return getBoolean(key); } catch (Exception e) { return defaultValue; } } /** * Get an optional double associated with a key, * or NaN if there is no such key or if its value is not a number. * If the value is a string, an attempt will be made to evaluate it as * a number. * * @param key A string which is the key. * @return An object which is the value. */ public double optDouble(String key) { return optDouble(key, Double.NaN); } /** * Get an optional double associated with a key, or the * defaultValue if there is no such key or if its value is not a number. * If the value is a string, an attempt will be made to evaluate it as * a number. * * @param key A key string. * @param defaultValue The default. * @return An object which is the value. */ public double optDouble(String key, double defaultValue) { try { return getDouble(key); } catch (Exception e) { return defaultValue; } } /** * Get an optional int value associated with a key, * or zero 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. * * @param key A key string. * @return An object which is the value. */ public int optInt(String key) { return optInt(key, 0); } /** * Get an optional int 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. * * @param key A key string. * @param defaultValue The default. * @return An object which is the value. */ public int optInt(String key, int defaultValue) { try { return getInt(key); } catch (Exception e) { return defaultValue; } } /** * Get an optional JSONArray associated with a key. * It returns null if there is no such key, or if its value is not a * JSONArray. * * @param key A key string. * @return A JSONArray which is the value. */ public JSONArray optJSONArray(String key) { Object o = opt(key); return o instanceof JSONArray ? (JSONArray)o : null; } /** * Get an optional JSONObject associated with a key. * It returns null if there is no such key, or if its value is not a * JSONObject. * * @param key A key string. * @return A JSONObject which is the value. */ public JSONObject optJSONObject(String key) { Object object = opt(key); return object instanceof JSONObject ? (JSONObject)object : null; } /** * Get an optional long value associated with a key, * or zero 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. * * @param key A key string. * @return An object which is the value. */ public long optLong(String key) { return optLong(key, 0); } /** * Get an optional long 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. * * @param key A key string. * @param defaultValue The default. * @return An object which is the value. */ public long optLong(String key, long defaultValue) { try { return getLong(key); } catch (Exception e) { return defaultValue; } } /** * Get an optional string associated with a key. * It returns an empty string if there is no such key. If the value is not * a string and is not null, then it is converted to a string. * * @param key A key string. * @return A string which is the value. */ public String optString(String key) { return optString(key, ""); } /** * Get an optional string associated with a key. * It returns the defaultValue if there is no such key. * * @param key A key string. * @param defaultValue The default. * @return A string which is the value. */ public String optString(String key, String defaultValue) { Object object = opt(key); return NULL.equals(object) ? defaultValue : object.toString(); } private void populateMap(Object bean) { Class klass = bean.getClass(); // If klass is a System class then set includeSuperClass to false. boolean includeSuperClass = klass.getClassLoader() != null; Method[] methods = (includeSuperClass) ? klass.getMethods() : klass.getDeclaredMethods(); for (int i = 0; i < methods.length; i += 1) { try { Method method = methods[i]; if (Modifier.isPublic(method.getModifiers())) { String name = method.getName(); String key = ""; if (name.startsWith("get")) { if (name.equals("getClass") || name.equals("getDeclaringClass")) { key = ""; } else { key = name.substring(3); } } else if (name.startsWith("is")) { key = name.substring(2); } if (key.length() > 0 && Character.isUpperCase(key.charAt(0)) && method.getParameterTypes().length == 0) { if (key.length() == 1) { key = key.toLowerCase(); } else if (!Character.isUpperCase(key.charAt(1))) { key = key.substring(0, 1).toLowerCase() + key.substring(1); } Object result = method.invoke(bean, (Object[])null); if (result != null) { map.put(key, wrap(result)); } } } } catch (Exception ignore) { } } } /** * Put a key/boolean pair in the JSONObject. * * @param key A key string. * @param value A boolean which is the value. * @return this. * @throws JSONException If the key is null. |
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