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Diffstat (limited to 'mobileapp/src/org/json/JSONObject.java')
| -rwxr-xr-x | mobileapp/src/org/json/JSONObject.java | 1584 |
1 files changed, 1584 insertions, 0 deletions
diff --git a/mobileapp/src/org/json/JSONObject.java b/mobileapp/src/org/json/JSONObject.java new file mode 100755 index 0000000..e34a752 --- /dev/null +++ b/mobileapp/src/org/json/JSONObject.java @@ -0,0 +1,1584 @@ +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.HashMap; +import java.util.Iterator; +import java.util.Map; +import java.util.TreeSet; + +/** + * 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. + * <p> + * The <code>put</code> methods adds values to 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 2010-05-17 + */ +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(); + this.map.put(e.getKey(), wrap(e.getValue())); + } + } + } + + + /** + * 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)); + } + + + /** + * 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. + * @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 o = opt(key); + if (o == null) { + put(key, value instanceof JSONArray ? + new JSONArray().put(value) : + value); + } else if (o instanceof JSONArray) { + ((JSONArray)o).put(value); + } else { + put(key, new JSONArray().put(o).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 o = opt(key); + if (o == null) { + put(key, new JSONArray().put(value)); + } else if (o instanceof JSONArray) { + put(key, ((JSONArray)o).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. + */ + static public String doubleToString(double d) { + if (Double.isInfinite(d) || Double.isNaN(d)) { + return "null"; + } + +// Shave off trailing zeros and decimal point, if possible. + + String s = Double.toString(d); + if (s.indexOf('.') > 0 && s.indexOf('e') < 0 && s.indexOf('E') < 0) { + while (s.endsWith("0")) { + s = s.substring(0, s.length() - 1); + } + if (s.endsWith(".")) { + s = s.substring(0, s.length() - 1); + } + } + return s; + } + + + /** + * 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 { + Object o = opt(key); + if (o == null) { + throw new JSONException("JSONObject[" + quote(key) + + "] not found."); + } + return o; + } + + + /** + * 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 o = get(key); + if (o.equals(Boolean.FALSE) || + (o instanceof String && + ((String)o).equalsIgnoreCase("false"))) { + return false; + } else if (o.equals(Boolean.TRUE) || + (o instanceof String && + ((String)o).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 o = get(key); + try { + return o instanceof Number ? + ((Number)o).doubleValue() : + Double.valueOf((String)o).doubleValue(); + } 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 o = get(key); + try { + return o instanceof Number ? + ((Number)o).intValue() : + Integer.parseInt((String)o); + } 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 o = get(key); + if (o instanceof JSONArray) { + return (JSONArray)o; + } + 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 o = get(key); + if (o instanceof JSONObject) { + return (JSONObject)o; + } + 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 o = get(key); + try { + return o instanceof Number ? + ((Number)o).longValue() : + Long.parseLong((String)o); + } 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 i = jo.keys(); + String[] names = new String[length]; + int j = 0; + while (i.hasNext()) { + names[j] = (String)i.next(); + j += 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 { + return get(key).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 [" + 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 = keys(); + while (keys.hasNext()) { + ja.put(keys.next()); + } + return ja.length() == 0 ? null : ja; + } + + /** + * Produce a string from a Number. + * @param n A Number + * @return A String. + * @throws JSONException If n is a non-finite number. + */ + static public String numberToString(Number n) + throws JSONException { + if (n == null) { + throw new JSONException("Null pointer"); + } + testValidity(n); + +// Shave off trailing zeros and decimal point, if possible. + + String s = n.toString(); + if (s.indexOf('.') > 0 && s.indexOf('e') < 0 && s.indexOf('E') < 0) { + while (s.endsWith("0")) { + s = s.substring(0, s.length() - 1); + } + if (s.endsWith(".")) { + s = s.substring(0, s.length() - 1); + } + } + return s; + } + + + /** + * 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 { + Object o = opt(key); + return o instanceof Number ? ((Number)o).doubleValue() : + new Double((String)o).doubleValue(); + } 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 o = opt(key); + return o instanceof JSONObject ? (JSONObject)o : 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 coverted 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 o = opt(key); + return o != null ? o.toString() : defaultValue; + } + + + 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); + + 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. + */ + public JSONObject put(String key, boolean value) throws JSONException { + put(key, value ? Boolean.TRUE : Boolean.FALSE); + return this; + } + + + /** + * Put a key/value pair in the JSONObject, where the value will be a + * JSONArray which is produced from a Collection. + * @param key A key string. + * @param value A Collection value. + * @return this. + * @throws JSONException + */ + public JSONObject put(String key, Collection value) throws JSONException { + put(key, new JSONArray(value)); + return this; + } + + + /** + * Put a key/double pair in the JSONObject. + * + * @param key A key string. + * @param value A double which is the value. + * @return this. + * @throws JSONException If the key is null or if the number is invalid. + */ + public JSONObject put(String key, double value) throws JSONException { + put(key, new Double(value)); + return this; + } + + + /** + * Put a key/int pair in the JSONObject. + * + * @param key A key string. + * @param value An int which is the value. + * @return this. + * @throws JSONException If the key is null. + */ + public JSONObject put(String key, int value) throws JSONException { + put(key, new Integer(value)); + return this; + } + + + /** + * Put a key/long pair in the JSONObject. + * + * @param key A key string. + * @param value A long which is the value. + * @return this. + * @throws JSONException If the key is null. + */ + public JSONObject put(String key, long value) throws JSONException { + put(key, new Long(value)); + return this; + } + + + /** + * Put a key/value pair in the JSONObject, where the value will be a + * JSONObject which is produced from a Map. + * @param key A key string. + * @param value A Map value. + * @return this. + * @throws JSONException + */ + public JSONObject put(String key, Map value) throws JSONException { + put(key, new JSONObject(value)); + return this; + } + + + /** + * Put a key/value pair in the JSONObject. If the value is null, + * then the key will be removed from the JSONObject if it is present. + * @param key A key string. + * @param value An object which is the value. It should be of one of these + * types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String, + * or the JSONObject.NULL object. + * @return this. + * @throws JSONException If the value is non-finite number + * or if the key is null. + */ + public JSONObject put(String key, Object value) throws JSONException { + if (key == null) { + throw new JSONException("Null key."); + } + if (value != null) { + testValidity(value); + this.map.put(key, value); + } else { + remove(key); + } + return this; + } + + + /** + * Put a key/value pair in the JSONObject, but only if the key and the + * value are both non-null, and only if there is not already a member + * with that name. + * @param key + * @param value + * @return his. + * @throws JSONException if the key is a duplicate + */ + public JSONObject putOnce(String key, Object value) throws JSONException { + if (key != null && value != null) { + if (opt(key) != null) { + throw new JSONException("Duplicate key \"" + key + "\""); + } + put(key, value); + } + return this; + } + + + /** + * Put a key/value pair in the JSONObject, but only if the + * key and the value are both non-null. + * @param key A key string. + * @param value An object which is the value. It should be of one of these + * types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String, + * or the JSONObject.NULL object. + * @return this. + * @throws JSONException If the value is a non-finite number. + */ + public JSONObject putOpt(String key, Object value) throws JSONException { + if (key != null && value != null) { + put(key, value); + } + return this; + } + + + /** + * Produce a string in double quotes with backslash sequences in all the + * right places. A backslash will be inserted within </, allowing JSON + * text to be delivered in HTML. In JSON text, a string cannot contain a + * control character or an unescaped quote or backslash. + * @param string A String + * @return A String correctly formatted for insertion in a JSON text. + */ + public static String quote(String string) { + if (string == null || string.length() == 0) { + return "\"\""; + } + + char b; + char c = 0; + int i; + int len = string.length(); + StringBuffer sb = new StringBuffer(len + 4); + String t; + + sb.append('"'); + for (i = 0; i < len; i += 1) { + b = c; + c = string.charAt(i); + switch (c) { + case '\\': + case '"': + sb.append('\\'); + sb.append(c); + break; + case '/': + if (b == '<') { + sb.append('\\'); + } + sb.append(c); + break; + case '\b': + sb.append("\\b"); + break; + case '\t': + sb.append("\\t"); + break; + case '\n': + sb.append("\\n"); + break; + case '\f': + sb.append("\\f"); + break; + case '\r': + sb.append("\\r"); + break; + default: + if (c < ' ' || (c >= '\u0080' && c < '\u00a0') || + (c >= '\u2000' && c < '\u2100')) { + t = "000" + Integer.toHexString(c); + sb.append("\\u" + t.substring(t.length() - 4)); + } else { + sb.append(c); + } + } + } + sb.append('"'); + return sb.toString(); + } + + /** + * Remove a name and its value, if present. + * @param key The name to be removed. + * @return The value that was associated with the name, + * or null if there was no value. + */ + public Object remove(String key) { + return this.map.remove(key); + } + + /** + * Get an enumeration of the keys of the JSONObject. + * The keys will be sorted alphabetically. + * + * @return An iterator of the keys. + */ + public Iterator sortedKeys() { + return new TreeSet(this.map.keySet()).iterator(); + } + + /** + * Try to convert a string into a number, boolean, or null. If the string + * can't be converted, return the string. + * @param s A String. + * @return A simple JSON value. + */ + static public Object stringToValue(String s) { + if (s.equals("")) { + return s; + } + if (s.equalsIgnoreCase("true")) { + return Boolean.TRUE; + } + if (s.equalsIgnoreCase("false")) { + return Boolean.FALSE; + } + if (s.equalsIgnoreCase("null")) { + return JSONObject.NULL; + } + + /* + * If it might be a number, try converting it. + * We support the non-standard 0x- convention. + * If a number cannot be produced, then the value will just + * be a string. Note that the 0x-, plus, and implied string + * conventions are non-standard. A JSON parser may accept + * non-JSON forms as long as it accepts all correct JSON forms. + */ + + char b = s.charAt(0); + if ((b >= '0' && b <= '9') || b == '.' || b == '-' || b == '+') { + if (b == '0' && s.length() > 2 && + (s.charAt(1) == 'x' || s.charAt(1) == 'X')) { + try { + return new Integer(Integer.parseInt(s.substring(2), 16)); + } catch (Exception ignore) { + } + } + try { + if (s.indexOf('.') > -1 || + s.indexOf('e') > -1 || s.indexOf('E') > -1) { + return Double.valueOf(s); + } else { + Long myLong = new Long(s); + if (myLong.longValue() == myLong.intValue()) { + return new Integer(myLong.intValue()); + } else { + return myLong; + } + } + } catch (Exception ignore) { + } + } + return s; + } + + + /** + * Throw an exception if the object is an NaN or infinite number. + * @param o The object to test. + * @throws JSONException If o is a non-finite number. + */ + static void testValidity(Object o) throws JSONException { + if (o != null) { + if (o instanceof Double) { + if (((Double)o).isInfinite() || ((Double)o).isNaN()) { + throw new JSONException( + "JSON does not allow non-finite numbers."); + } + } else if (o instanceof Float) { + if (((Float)o).isInfinite() || ((Float)o).isNaN()) { + throw new JSONException( + "JSON does not allow non-finite numbers."); + } + } + } + } + + + /** + * Produce a JSONArray containing the values of the members of this + * JSONObject. + * @param names A JSONArray containing a list of key strings. This + * determines the sequence of the values in the result. + * @return A JSONArray of values. + * @throws JSONException If any of the values are non-finite numbers. + */ + public JSONArray toJSONArray(JSONArray names) throws JSONException { + if (names == null || names.length() == 0) { + return null; + } + JSONArray ja = new JSONArray(); + for (int i = 0; i < names.length(); i += 1) { + ja.put(this.opt(names.getString(i))); + } + return ja; + } + + /** + * Make a JSON text of this JSONObject. For compactness, no whitespace + * is added. If this would not result in a syntactically correct JSON text, + * then null will be returned instead. + * <p> + * Warning: This method assumes that the data structure is acyclical. + * + * @return a printable, displayable, portable, transmittable + * representation of the object, beginning + * with <code>{</code> <small>(left brace)</small> and ending + * with <code>}</code> <small>(right brace)</small>. + */ + public String toString() { + try { + Iterator keys = keys(); + StringBuffer sb = new StringBuffer("{"); + + while (keys.hasNext()) { + if (sb.length() > 1) { + sb.append(','); + } + Object o = keys.next(); + sb.append(quote(o.toString())); + sb.append(':'); + sb.append(valueToString(this.map.get(o))); + } + sb.append('}'); + return sb.toString(); + } catch (Exception e) { + return null; + } + } + + + /** + * Make a prettyprinted JSON text of this JSONObject. + * <p> + * Warning: This method assumes that the data structure is acyclical. + * @param indentFactor The number of spaces to add to each level of + * indentation. + * @return a printable, displayable, portable, transmittable + * representation of the object, beginning + * with <code>{</code> <small>(left brace)</small> and ending + * with <code>}</code> <small>(right brace)</small>. + * @throws JSONException If the object contains an invalid number. + */ + public String toString(int indentFactor) throws JSONException { + return toString(indentFactor, 0); + } + + + /** + * Make a prettyprinted JSON text of this JSONObject. + * <p> + * Warning: This method assumes that the data structure is acyclical. + * @param indentFactor The number of spaces to add to each level of + * indentation. + * @param indent The indentation of the top level. + * @return a printable, displayable, transmittable + * representation of the object, beginning + * with <code>{</code> <small>(left brace)</small> and ending + * with <code>}</code> <small>(right brace)</small>. + * @throws JSONException If the object contains an invalid number. + */ + String toString(int indentFactor, int indent) throws JSONException { + int j; + int n = length(); + if (n == 0) { + return "{}"; + } + Iterator keys = sortedKeys(); + StringBuffer sb = new StringBuffer("{"); + int newindent = indent + indentFactor; + Object o; + if (n == 1) { + o = keys.next(); + sb.append(quote(o.toString())); + sb.append(": "); + sb.append(valueToString(this.map.get(o), indentFactor, + indent)); + } else { + while (keys.hasNext()) { + o = keys.next(); + if (sb.length() > 1) { + sb.append(",\n"); + } else { + sb.append('\n'); + } + for (j = 0; j < newindent; j += 1) { + sb.append(' '); + } + sb.append(quote(o.toString())); + sb.append(": "); + sb.append(valueToString(this.map.get(o), indentFactor, + newindent)); + } + if (sb.length() > 1) { + sb.append('\n'); + for (j = 0; j < indent; j += 1) { + sb.append(' '); + } + } + } + sb.append('}'); + return sb.toString(); + } + + + /** + * Make a JSON text of an Object value. If the object has an + * value.toJSONString() method, then that method will be used to produce + * the JSON text. The method is required to produce a strictly + * conforming text. If the object does not contain a toJSONString + * method (which is the most common case), then a text will be + * produced by other means. If the value is an array or Collection, + * then a JSONArray will be made from it and its toJSONString method + * will be called. If the value is a MAP, then a JSONObject will be made + * from it and its toJSONString method will be called. Otherwise, the + * value's toString method will be called, and the result will be quoted. + * + * <p> + * Warning: This method assumes that the data structure is acyclical. + * @param value The value to be serialized. + * @return a printable, displayable, transmittable + * representation of the object, beginning + * with <code>{</code> <small>(left brace)</small> and ending + * with <code>}</code> <small>(right brace)</small>. + * @throws JSONException If the value is or contains an invalid number. + */ + static String valueToString(Object value) throws JSONException { + if (value == null || value.equals(null)) { + return "null"; + } + if (value instanceof JSONString) { + Object o; + try { + o = ((JSONString)value).toJSONString(); + } catch (Exception e) { + throw new JSONException(e); + } + if (o instanceof String) { + return (String)o; + } + throw new JSONException("Bad value from toJSONString: " + o); + } + if (value instanceof Number) { + return numberToString((Number) value); + } + if (value instanceof Boolean || value instanceof JSONObject || + value instanceof JSONArray) { + return value.toString(); + } + if (value instanceof Map) { + return new JSONObject((Map)value).toString(); + } + if (value instanceof Collection) { + return new JSONArray((Collection)value).toString(); + } + if (value.getClass().isArray()) { + return new JSONArray(value).toString(); + } + return quote(value.toString()); + } + + + /** + * Make a prettyprinted JSON text of an object value. + * <p> + * Warning: This method assumes that the data structure is acyclical. + * @param value The value to be serialized. + * @param indentFactor The number of spaces to add to each level of + * indentation. + * @param indent The indentation of the top level. + * @return a printable, displayable, transmittable + * representation of the object, beginning + * with <code>{</code> <small>(left brace)</small> and ending + * with <code>}</code> <small>(right brace)</small>. + * @throws JSONException If the object contains an invalid number. + */ + static String valueToString(Object value, int indentFactor, int indent) + throws JSONException { + if (value == null || value.equals(null)) { + return "null"; + } + try { + if (value instanceof JSONString) { + Object o = ((JSONString)value).toJSONString(); + if (o instanceof String) { + return (String)o; + } + } + } catch (Exception ignore) { + } + if (value instanceof Number) { + return numberToString((Number) value); + } + if (value instanceof Boolean) { + return value.toString(); + } + if (value instanceof JSONObject) { + return ((JSONObject)value).toString(indentFactor, indent); + } + if (value instanceof JSONArray) { + return ((JSONArray)value).toString(indentFactor, indent); + } + if (value instanceof Map) { + return new JSONObject((Map)value).toString(indentFactor, indent); + } + if (value instanceof Collection) { + return new JSONArray((Collection)value).toString(indentFactor, indent); + } + if (value.getClass().isArray()) { + return new JSONArray(value).toString(indentFactor, indent); + } + return quote(value.toString()); + } + + + /** + * Wrap an object, if necessary. If the object is null, return the NULL + * object. If it is an array or collection, wrap it in a JSONArray. If + * it is a map, wrap it in a JSONObject. If it is a standard property + * (Double, String, et al) then it is already wrapped. Otherwise, if it + * comes from one of the java packages, turn it into a string. And if + * it doesn't, try to wrap it in a JSONObject. If the wrapping fails, + * then null is returned. + * + * @param object The object to wrap + * @return The wrapped value + */ + static Object wrap(Object object) { + try { + if (object == null) { + return NULL; + } + if (object instanceof JSONObject || object instanceof JSONArray || + NULL.equals(object) || object instanceof JSONString || + object instanceof Byte || object instanceof Character || + object instanceof Short || object instanceof Integer || + object instanceof Long || object instanceof Boolean || + object instanceof Float || object instanceof Double || + object instanceof String) { + return object; + } + + if (object instanceof Collection) { + return new JSONArray((Collection)object); + } + if (object.getClass().isArray()) { + return new JSONArray(object); + } + if (object instanceof Map) { + return new JSONObject((Map)object); + } + Package objectPackage = object.getClass().getPackage(); + String objectPackageName = ( objectPackage != null ? objectPackage.getName() : "" ); + if (objectPackageName.startsWith("java.") || + objectPackageName.startsWith("javax.") || + object.getClass().getClassLoader() == null) { + return object.toString(); + } + return new JSONObject(object); + } catch(Exception exception) { + return null; + } + } + + + /** + * Write the contents of the JSONObject as JSON text to a writer. + * For compactness, no whitespace is added. + * <p> + * Warning: This method assumes that the data structure is acyclical. + * + * @return The writer. + * @throws JSONException + */ + public Writer write(Writer writer) throws JSONException { + try { + boolean b = false; + Iterator keys = keys(); + writer.write('{'); + + while (keys.hasNext()) { + if (b) { + writer.write(','); + } + Object k = keys.next(); + writer.write(quote(k.toString())); + writer.write(':'); + Object v = this.map.get(k); + if (v instanceof JSONObject) { + ((JSONObject)v).write(writer); + } else if (v instanceof JSONArray) { + ((JSONArray)v).write(writer); + } else { + writer.write(valueToString(v)); + } + b = true; + } + writer.write('}'); + return writer; + } catch (IOException exception) { + throw new JSONException(exception); + } + } +}
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