get and opt methods for accessing the values by name, and put methods
* for adding or replacing values by name. The values can be any of these types: Boolean,
* JSONArray, JSONObject, Number, String, or the
* JSONObject.NULL 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 get and opt methods, or to convert
* values into a JSON text using the put and toString methods. A get method
* returns a value if one can be found, and throws an exception if one cannot be found. An opt method
* returns a default value instead of throwing an exception, and so is useful for obtaining optional values.
*
* The generic get() and opt() methods return an object, which you can cast or query for type.
* There are also typed get and opt methods that do type checking and type coercion for you.
*
* The put methods adds values to an object. For example,
*
*
* myString = new JSONObject().put("JSON", "Hello, World!").toString();
*
*
* produces the string {"JSON": "Hello, World"}.
*
* The texts produced by the toString methods strictly conform to the JSON syntax rules. The constructors
* are more forgiving in the texts they will accept:
*
, (comma) may appear just before the closing brace.' (single quote).{ } [ ] / \ : , = ; # and if they do not look like numbers and if they are not the reserved words
* true, false, or null.= or => as well as by :.; (semicolon) as well as by ,
* (comma).0- (octal) or 0x- (hex) prefix.NULL object than to use Java's
* null value. JSONObject.NULL.equals(null) returns true.
* JSONObject.NULL.toString() returns "null".
*/
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 "get" or "is"
* 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 "get" or "is" 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 "getName", and if the result of calling
* object.getName() is "Larry Fine", then the JSONObject will contain
* "name": "Larry Fine".
*
* @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 { (left brace) and ending with
* } (right brace).
* @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. If the number value is too large for an int, it will be clipped.
*
* @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);
return o instanceof Number ? ((Number) o).intValue() : (int) getDouble(key);
}
/**
* 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. If the number value is too long for a long, it will be clipped.
*
* @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);
return o instanceof Number ? ((Number) o).longValue() : (long) getDouble(key);
}
/**
* 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();
Field[] fields = (includeSuperClass) ? klass.getFields() : klass.getDeclaredFields();
Set
* Warning: This method assumes that the data structure is acyclical.
*
* @return a printable, displayable, portable, transmittable representation of the object, beginning with
* { (left brace) and ending with } (right brace).
*/
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.
*
* 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
* { (left brace) and ending with } (right brace).
* @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.
*
* 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 {
* (left brace) and ending with } (right brace).
* @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.
*
*
* 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 {
* (left brace) and ending with } (right brace).
* @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.
*
* 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 {
* (left brace) and ending with } (right brace).
* @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 routines.system.Document || object instanceof JSONObject || object instanceof JSONArray || 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 || NULL.equals(object)) {
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.
*
* 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);
}
}
}
/**
* A JSONTokener takes a source string and extracts characters and tokens from it. It is used by the JSONObject and
* JSONArray constructors to parse JSON source strings.
*
* @author JSON.org
* @version 2010-02-02
*/
class JSONTokener {
private int character;
private boolean eof;
private int index;
private int line;
private char previous;
private Reader reader;
private boolean usePrevious;
/**
* Construct a JSONTokener from a reader.
*
* @param reader A reader.
*/
public JSONTokener(Reader reader) {
this.reader = reader.markSupported() ? reader : new BufferedReader(reader);
this.eof = false;
this.usePrevious = false;
this.previous = 0;
this.index = 0;
this.character = 1;
this.line = 1;
}
/**
* Construct a JSONTokener from a string.
*
* @param s A source string.
*/
public JSONTokener(String s) {
this(new StringReader(s));
}
/**
* Back up one character. This provides a sort of lookahead capability, so that you can test for a digit or letter
* before attempting to parse the next number or identifier.
*/
public void back() throws JSONException {
if (usePrevious || index <= 0) {
throw new JSONException("Stepping back two steps is not supported");
}
this.index -= 1;
this.character -= 1;
this.usePrevious = true;
this.eof = false;
}
/**
* Get the hex value of a character (base16).
*
* @param c A character between '0' and '9' or between 'A' and 'F' or between 'a' and 'f'.
* @return An int between 0 and 15, or -1 if c was not a hex digit.
*/
public static int dehexchar(char c) {
if (c >= '0' && c <= '9') {
return c - '0';
}
if (c >= 'A' && c <= 'F') {
return c - ('A' - 10);
}
if (c >= 'a' && c <= 'f') {
return c - ('a' - 10);
}
return -1;
}
public boolean end() {
return eof && !usePrevious;
}
/**
* Determine if the source string still contains characters that next() can consume.
*
* @return true if not yet at the end of the source.
*/
public boolean more() throws JSONException {
next();
if (end()) {
return false;
}
back();
return true;
}
/**
* Get the next character in the source string.
*
* @return The next character, or 0 if past the end of the source string.
*/
public char next() throws JSONException {
int c;
if (this.usePrevious) {
this.usePrevious = false;
c = this.previous;
} else {
try {
c = this.reader.read();
} catch (IOException exception) {
throw new JSONException(exception);
}
if (c <= 0) { // End of stream
this.eof = true;
c = 0;
}
}
this.index += 1;
if (this.previous == '\r') {
this.line += 1;
this.character = c == '\n' ? 0 : 1;
} else if (c == '\n') {
this.line += 1;
this.character = 0;
} else {
this.character += 1;
}
this.previous = (char) c;
return this.previous;
}
/**
* Consume the next character, and check that it matches a specified character.
*
* @param c The character to match.
* @return The character.
* @throws JSONException if the character does not match.
*/
public char next(char c) throws JSONException {
char n = next();
if (n != c) {
throw syntaxError("Expected '" + c + "' and instead saw '" + n + "'");
}
return n;
}
/**
* Get the next n characters.
*
* @param n The number of characters to take.
* @return A string of n characters.
* @throws JSONException Substring bounds error if there are not n characters remaining in the source string.
*/
public String next(int n) throws JSONException {
if (n == 0) {
return "";
}
char[] buffer = new char[n];
int pos = 0;
while (pos < n) {
buffer[pos] = next();
if (end()) {
throw syntaxError("Substring bounds error");
}
pos += 1;
}
return new String(buffer);
}
/**
* Get the next char in the string, skipping whitespace.
*
* @throws JSONException
* @return A character, or 0 if there are no more characters.
*/
public char nextClean() throws JSONException {
for (;;) {
char c = next();
if (c == 0 || c > ' ') {
return c;
}
}
}
/**
* Return the characters up to the next close quote character. Backslash processing is done. The formal JSON format
* does not allow strings in single quotes, but an implementation is allowed to accept them.
*
* @param quote The quoting character, either " (double quote) or '
* (single quote).
* @return A String.
* @throws JSONException Unterminated string.
*/
public String nextString(char quote) throws JSONException {
char c;
StringBuffer sb = new StringBuffer();
for (;;) {
c = next();
switch (c) {
case 0:
case '\n':
case '\r':
throw syntaxError("Unterminated string");
case '\\':
c = next();
switch (c) {
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;
case 'u':
sb.append((char) Integer.parseInt(next(4), 16));
break;
case '"':
case '\'':
case '\\':
case '/':
sb.append(c);
break;
default:
throw syntaxError("Illegal escape.");
}
break;
default:
if (c == quote) {
return sb.toString();
}
sb.append(c);
}
}
}
/**
* Get the text up but not including the specified character or the end of line, whichever comes first.
*
* @param d A delimiter character.
* @return A string.
*/
public String nextTo(char d) throws JSONException {
StringBuffer sb = new StringBuffer();
for (;;) {
char c = next();
if (c == d || c == 0 || c == '\n' || c == '\r') {
if (c != 0) {
back();
}
return sb.toString().trim();
}
sb.append(c);
}
}
/**
* Get the text up but not including one of the specified delimiter characters or the end of line, whichever comes
* first.
*
* @param delimiters A set of delimiter characters.
* @return A string, trimmed.
*/
public String nextTo(String delimiters) throws JSONException {
char c;
StringBuffer sb = new StringBuffer();
for (;;) {
c = next();
if (delimiters.indexOf(c) >= 0 || c == 0 || c == '\n' || c == '\r') {
if (c != 0) {
back();
}
return sb.toString().trim();
}
sb.append(c);
}
}
/**
* Get the next value. The value can be a Boolean, Double, Integer, JSONArray, JSONObject, Long, or String, or the
* JSONObject.NULL object.
*
* @throws JSONException If syntax error.
*
* @return An object.
*/
public Object nextValue() throws JSONException {
char c = nextClean();
String s;
switch (c) {
case '"':
case '\'':
return nextString(c);
case '{':
back();
return new JSONObject(this);
case '[':
case '(':
back();
return new JSONArray(this);
}
/*
* Handle unquoted text. This could be the values true, false, or null, or it can be a number. An implementation
* (such as this one) is allowed to also accept non-standard forms.
*
* Accumulate characters until we reach the end of the text or a formatting character.
*/
StringBuffer sb = new StringBuffer();
while (c >= ' ' && ",:]}/\\\"[{;=#".indexOf(c) < 0) {
sb.append(c);
c = next();
}
back();
s = sb.toString().trim();
if (s.equals("")) {
throw syntaxError("Missing value");
}
return JSONObject.stringToValue(s);
}
/**
* Skip characters until the next character is the requested character. If the requested character is not found, no
* characters are skipped.
*
* @param to A character to skip to.
* @return The requested character, or zero if the requested character is not found.
*/
public char skipTo(char to) throws JSONException {
char c;
try {
int startIndex = this.index;
int startCharacter = this.character;
int startLine = this.line;
reader.mark(Integer.MAX_VALUE);
do {
c = next();
if (c == 0) {
reader.reset();
this.index = startIndex;
this.character = startCharacter;
this.line = startLine;
return c;
}
} while (c != to);
} catch (IOException exc) {
throw new JSONException(exc);
}
back();
return c;
}
/**
* Make a JSONException to signal a syntax error.
*
* @param message The error message.
* @return A JSONException object, suitable for throwing
*/
public JSONException syntaxError(String message) {
return new JSONException(message + toString());
}
/**
* Make a printable string of this JSONTokener.
*
* @return " at {index} [character {character} line {line}]"
*/
public String toString() {
return " at " + index + " [character " + this.character + " line " + this.line + "]";
}
}
/**
* The JSONException is thrown by the JSON.org classes when things are amiss.
*
* @author JSON.org
* @version 2008-09-18
*/
class JSONException extends Exception {
/**
*
*/
private static final long serialVersionUID = 0;
private Throwable cause;
/**
* Constructs a JSONException with an explanatory message.
*
* @param message Detail about the reason for the exception.
*/
public JSONException(String message) {
super(message);
}
public JSONException(Throwable t) {
super(t.getMessage());
this.cause = t;
}
public Throwable getCause() {
return this.cause;
}
}
/**
* 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 get and opt methods for
* accessing the values by index, and put methods for adding or replacing values. The values can be any of
* these types: Boolean, JSONArray, JSONObject, Number,
* String, or the JSONObject.NULL object.
*
* The constructor can convert a JSON text into a Java object. The toString method converts to JSON text.
*
* A get method returns a value if one can be found, and throws an exception if one cannot be found. An
* opt method returns a default value instead of throwing an exception, and so is useful for obtaining
* optional values.
*
* The generic get() and opt() methods return an object which you can cast or query for type.
* There are also typed get and opt methods that do type checking and type coercion for you.
*
* The texts produced by the toString methods strictly conform to JSON syntax rules. The constructors are
* more forgiving in the texts they will accept:
*
, (comma) may appear just before the closing bracket.null value will be inserted when there is , (comma) elision.' (single quote).{ } [ ] / \ : , = ; # and if they do not look like numbers and if they are not the reserved words
* true, false, or null.; (semicolon) as well as by ,
* (comma).0x- (hex) prefix.[ (left bracket) and ends with
* ] (right bracket).
* @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) {
this.myArrayList = new ArrayList();
if (collection != null) {
Iterator iter = collection.iterator();
;
while (iter.hasNext()) {
Object o = iter.next();
this.myArrayList.add(JSONObject.wrap(o));
}
}
}
/**
* Construct a JSONArray from an array
*
* @throws JSONException If not an array.
*/
public JSONArray(Object array) throws JSONException {
this();
if (array.getClass().isArray()) {
int length = Array.getLength(array);
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.");
}
}
/**
* 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 o = opt(index);
if (o == null) {
throw new JSONException("JSONArray[" + index + "] not found.");
}
return o;
}
/**
* 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 convertable to boolean.
*/
public boolean getBoolean(int index) throws JSONException {
Object o = get(index);
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("JSONArray[" + index + "] is not a Boolean.");
}
/**
* 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 {
Object o = get(index);
try {
return o instanceof Number ? ((Number) o).doubleValue() : Double.valueOf((String) o).doubleValue();
} catch (Exception e) {
throw new JSONException("JSONArray[" + index + "] is not a number.");
}
}
/**
* 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 cannot be converted to a number. if the value
* cannot be converted to a number.
*/
public int getInt(int index) throws JSONException {
Object o = get(index);
return o instanceof Number ? ((Number) o).intValue() : (int) getDouble(index);
}
/**
* 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 o = get(index);
if (o instanceof JSONArray) {
return (JSONArray) o;
}
throw new JSONException("JSONArray[" + index + "] is not a JSONArray.");
}
/**
* 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 o = get(index);
if (o instanceof JSONObject) {
return (JSONObject) o;
}
throw new JSONException("JSONArray[" + index + "] is not a JSONObject.");
}
/**
* 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 {
Object o = get(index);
return o instanceof Number ? ((Number) o).longValue() : (long) getDouble(index);
}
/**
* 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 value for the index.
*/
public String getString(int index) throws JSONException {
return get(index).toString();
}
/**
* Determine if the value is null.
*
* @param index The index must be between 0 and length() - 1.
* @return true if the value at the index is null, or if there is no value.
*/
public boolean isNull(int index) {
return JSONObject.NULL.equals(opt(index));
}
/**
* Make a string from the contents of this JSONArray. The separator 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 = length();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < len; i += 1) {
if (i > 0) {
sb.append(separator);
}
sb.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.
* @return An object value, or null if there is no object at that index.
*/
public Object opt(int index) {
return (index < 0 || index >= 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 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 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 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) {
try {
return getDouble(index);
} catch (Exception e) {
return defaultValue;
}
}
/**
* 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 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) {
try {
return getInt(index);
} catch (Exception e) {
return 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 = 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 = 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 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) {
try {
return getLong(index);
} catch (Exception e) {
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 coverted to a string.
*
* @param index The index must be between 0 and length() - 1.
* @return A String value.
*/
public String optString(int index) {
return 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 o = opt(index);
return o != null ? o.toString() : defaultValue;
}
/**
* Append a boolean value. This increases the array's length by one.
*
* @param value A boolean value.
* @return this.
*/
public JSONArray put(boolean value) {
put(value ? Boolean.TRUE : Boolean.FALSE);
return this;
}
/**
* 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.
*/
public JSONArray put(Collection value) {
put(new JSONArray(value));
return this;
}
/**
* Append a double value. This increases the array's length by one.
*
* @param value A double value.
* @throws JSONException if the value is not finite.
* @return this.
*/
public JSONArray put(double value) throws JSONException {
Double d = new Double(value);
JSONObject.testValidity(d);
put(d);
return this;
}
/**
* Append an int value. This increases the array's length by one.
*
* @param value An int value.
* @return this.
*/
public JSONArray put(int value) {
put(new Integer(value));
return this;
}
/**
* Append an long value. This increases the array's length by one.
*
* @param value A long value.
* @return this.
*/
public JSONArray put(long value) {
put(new Long(value));
return this;
}
/**
* 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.
*/
public JSONArray put(Map value) {
put(new JSONObject(value));
return this;
}
/**
* 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.
*/
public JSONArray put(Object value) {
this.myArrayList.add(value);
return this;
}
/**
* Put or replace a boolean value in the JSONArray. If the index is greater than the length of the JSONArray, then
* null elements will be added as necessary to pad it out.
*
* @param index The subscript.
* @param value A boolean value.
* @return this.
* @throws JSONException If the index is negative.
*/
public JSONArray put(int index, boolean value) throws JSONException {
put(index, value ? Boolean.TRUE : Boolean.FALSE);
return this;
}
/**
* Put a value in the JSONArray, where the value will be a JSONArray which is produced from a Collection.
*
* @param index The subscript.
* @param value A Collection value.
* @return this.
* @throws JSONException If the index is negative or if the value is not finite.
*/
public JSONArray put(int index, Collection value) throws JSONException {
put(index, new JSONArray(value));
return this;
}
/**
* Put or replace a double value. If the index is greater than the length of the JSONArray, then null elements will
* be added as necessary to pad it out.
*
* @param index The subscript.
* @param value A double value.
* @return this.
* @throws JSONException If the index is negative or if the value is not finite.
*/
public JSONArray put(int index, double value) throws JSONException {
put(index, new Double(value));
return this;
}
/**
* Put or replace an int value. If the index is greater than the length of the JSONArray, then null elements will be
* added as necessary to pad it out.
*
* @param index The subscript.
* @param value An int value.
* @return this.
* @throws JSONException If the index is negative.
*/
public JSONArray put(int index, int value) throws JSONException {
put(index, new Integer(value));
return this;
}
/**
* Put or replace a long value. If the index is greater than the length of the JSONArray, then null elements will be
* added as necessary to pad it out.
*
* @param index The subscript.
* @param value A long value.
* @return this.
* @throws JSONException If the index is negative.
*/
public JSONArray put(int index, long value) throws JSONException {
put(index, new Long(value));
return this;
}
/**
* Put a value in the JSONArray, where the value will be a JSONObject which is produced from a Map.
*
* @param index The subscript.
* @param value The Map value.
* @return this.
* @throws JSONException If the index is negative or if the the value is an invalid number.
*/
public JSONArray put(int index, Map value) throws JSONException {
put(index, new JSONObject(value));
return this;
}
/**
* Put or replace an object value in the JSONArray. If the index is greater than the length of the JSONArray, then
* null elements will be added as necessary to pad it out.
*
* @param index The subscript.
* @param value The value to put into the array. The value should be a Boolean, Double, Integer, JSONArray,
* JSONObject, Long, or String, or the JSONObject.NULL object.
* @return this.
* @throws JSONException If the index is negative or if the the value is an invalid number.
*/
public JSONArray put(int index, Object value) throws JSONException {
JSONObject.testValidity(value);
if (index < 0) {
throw new JSONException("JSONArray[" + index + "] not found.");
}
if (index < length()) {
this.myArrayList.set(index, value);
} else {
while (index != length()) {
put(JSONObject.NULL);
}
put(value);
}
return this;
}
/**
* Remove an index and close the hole.
*
* @param index The index of the element to be removed.
* @return The value that was associated with the index, or null if there was no value.
*/
public Object remove(int index) {
Object o = opt(index);
this.myArrayList.remove(index);
return o;
}
/**
* Produce a JSONObject by combining a JSONArray of names with the values of this JSONArray.
*
* @param names A JSONArray containing a list of key strings. These will be paired with the values.
* @return A JSONObject, or null if there are no names or if this JSONArray has no values.
* @throws JSONException If any of the names are null.
*/
public JSONObject toJSONObject(JSONArray names) throws JSONException {
if (names == null || names.length() == 0 || length() == 0) {
return null;
}
JSONObject jo = new JSONObject();
for (int i = 0; i < names.length(); i += 1) {
jo.put(names.getString(i), this.opt(i));
}
return jo;
}
/**
* Make a JSON text of this JSONArray. For compactness, no unnecessary whitespace is added. If it is not possible to
* produce a syntactically correct JSON text then null will be returned instead. This could occur if the array
* contains an invalid number.
*
* Warning: This method assumes that the data structure is acyclical.
*
* @return a printable, displayable, transmittable representation of the array.
*/
public String toString() {
try {
return '[' + join(",") + ']';
} catch (Exception e) {
return null;
}
}
/**
* Make a prettyprinted JSON text of this JSONArray. 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, transmittable representation of the object, beginning with [
* (left bracket) and ending with ] (right bracket).
* @throws JSONException
*/
public String toString(int indentFactor) throws JSONException {
return toString(indentFactor, 0);
}
/**
* Make a prettyprinted JSON text of this JSONArray. 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 indention of the top level.
* @return a printable, displayable, transmittable representation of the array.
* @throws JSONException
*/
String toString(int indentFactor, int indent) throws JSONException {
int len = length();
if (len == 0) {
return "[]";
}
int i;
StringBuffer sb = new StringBuffer("[");
if (len == 1) {
sb.append(JSONObject.valueToString(this.myArrayList.get(0), indentFactor, indent));
} else {
int newindent = indent + indentFactor;
sb.append('\n');
for (i = 0; i < len; i += 1) {
if (i > 0) {
sb.append(",\n");
}
for (int j = 0; j < newindent; j += 1) {
sb.append(' ');
}
sb.append(JSONObject.valueToString(this.myArrayList.get(i), indentFactor, newindent));
}
sb.append('\n');
for (i = 0; i < indent; i += 1) {
sb.append(' ');
}
}
sb.append(']');
return sb.toString();
}
/**
* Write the contents of the JSONArray as JSON text to a writer. For compactness, no whitespace is added.
*
* 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;
int len = length();
writer.write('[');
for (int i = 0; i < len; i += 1) {
if (b) {
writer.write(',');
}
Object v = this.myArrayList.get(i);
if (v instanceof JSONObject) {
((JSONObject) v).write(writer);
} else if (v instanceof JSONArray) {
((JSONArray) v).write(writer);
} else {
writer.write(JSONObject.valueToString(v));
}
b = true;
}
writer.write(']');
return writer;
} catch (IOException e) {
throw new JSONException(e);
}
}
}
/**
* The JSONString interface allows a toJSONString() method so that a class can change the
* behavior of JSONObject.toString(), JSONArray.toString(), and JSONWriter.value(
* Object). The toJSONString method will be used instead of the default behavior of using the
* Object's toString() method and quoting the result.
*/
interface JSONString {
/**
* The toJSONString method allows a class to produce its own JSON serialization.
*
* @return A strictly syntactically correct JSON text.
*/
public String toJSONString();
}