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.
* @exception JSONException
* If a value is a non-finite number or if a name is
* duplicated.
*/
public JSONObject(JSONObject jo, String[] names) throws JSONException {
this();
for (int i= 0; i < names.length; i+= 1) {
putOnce(names[i], jo.opt(names[i]));
}
}
/**
* 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();
Object nextValue= x.nextValue();
if (nextValue == null) {
key= null;
} else {
key= nextValue.toString();
}
}
if (key != null) {
/*
* 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.
*/
public JSONObject(Map map) {
this.map= (map == null) ? new HashMap() : map;
}
/**
* Construct a JSONObject from a Map.
*
* Note: Use this constructor when the map contains "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();
populateInternalMap(bean, false);
}
/**
* 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.
*
* @param bean
* An object that has getter methods that should be used to make
* a JSONObject.
* @param includeSuperClass
* If true, include the super class properties.
*/
public JSONObject(Object bean, boolean includeSuperClass) {
this();
populateInternalMap(bean, includeSuperClass);
}
private void populateInternalMap(Object bean, boolean includeSuperClass) {
Class klass= bean.getClass();
/*
* If klass.getSuperClass is System class then force includeSuperClass
* to false.
*/
if (klass.getClassLoader() == null) {
includeSuperClass= false;
}
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")) {
key= name.substring(3);
} else if (name.startsWith("is")) {
key= name.substring(2);
}
if (key.length() > 0 && Character.isUpperCase(key.charAt(0)) && method.getParameterTypes().length == 0) {
if (key.length() == 1) {
key= key.toLowerCase();
} else if (!Character.isUpperCase(key.charAt(1))) {
key= key.substring(0, 1).toLowerCase() + key.substring(1);
}
Object result= method.invoke(bean, (Object[]) null);
if (result == null) {
map.put(key, NULL);
} else if (result.getClass().isArray()) {
map.put(key, new JSONArray(result, includeSuperClass));
} else if (result instanceof Collection) { // List or Set
map.put(key, new JSONArray((Collection) result, includeSuperClass));
} else if (result instanceof Map) {
map.put(key, new JSONObject((Map) result, includeSuperClass));
} else if (isStandardProperty(result.getClass())) { // Primitives, String and Wrapper
map.put(key, result);
} else {
if (result.getClass().getPackage().getName().startsWith("java") || result.getClass().getClassLoader() == null) {
map.put(key, result.toString());
} else { // User defined Objects
map.put(key, new JSONObject(result, includeSuperClass));
}
}
}
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
static boolean isStandardProperty(Class clazz) {
return clazz.isPrimitive() || clazz.isAssignableFrom(Byte.class) || clazz.isAssignableFrom(Short.class) || clazz.isAssignableFrom(Integer.class) || clazz.isAssignableFrom(Long.class) || clazz.isAssignableFrom(Float.class) || clazz.isAssignableFrom(Double.class) || clazz.isAssignableFrom(Character.class) || clazz.isAssignableFrom(String.class) || clazz.isAssignableFrom(Boolean.class);
}
/**
* 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 e) {
/* forget about it */
}
}
}
/**
* 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);
}
/**
* 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;
}
}
/**
* 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;
}
/**
* 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;
}
/**
* 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/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 = '\u0080' && c < '\u00a0') || (c >= '\u2000' && c < '\u2100')) {
t= "000" + Integer.toHexString(c);
sb.append("\\u");
sb.append(t.substring(t.length() - 4));
} else {
sb.append(c);
}
}
}
sb.append('"');
}
/**
* 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 0- and 0x-
* conventions. If a number cannot be produced, then the value will just
* be a string. Note that the 0-, 0x-, plus, and implied string
* conventions are non-standard. A JSON parser is free to 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') {
if (s.length() > 2 && (s.charAt(1) == 'x' || s.charAt(1) == 'X')) {
try {
return new Integer(Integer.parseInt(s.substring(2), 16));
} catch (Exception e) {
/* Ignore the error */
}
} else {
try {
return new Integer(Integer.parseInt(s, 8));
} catch (Exception e) {
/* Ignore the error */
}
}
}
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 f) {
/* Ignore the error */
}
}
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.
*
* 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;
}
}
public void serialize(StringBuilder target) throws JSONException {
target.append("{");
Iterator keys= keys();
boolean first= true;
while (keys.hasNext()) {
if (first) {
first= false;
} else {
target.append(',');
}
Object o= keys.next();
quote(o.toString(), target);
target.append(':');
valueToString(this.map.get(o), target);
}
target.append('}');
}
/**
* 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 {
StringBuilder result = new StringBuilder();
valueToString(value, result);
return result.toString();
}
static void valueToString(Object value, StringBuilder target) throws JSONException {
if (value == null || value.equals(null)) {
target.append("null");
return;
}
if (value instanceof JSONString) {
((JSONString)value).serialize(target);
return;
}
if (value instanceof Number) {
target.append(numberToString((Number) value));
return;
}
if (value instanceof Boolean) {
target.append(value.toString());
return;
}
if (value instanceof JSONObject) {
((JSONObject)value).serialize(target);
return;
}
if (value instanceof JSONArray) {
((JSONArray)value).serialize(target);
return;
}
if (value instanceof Map) {
new JSONObject((Map) value).serialize(target);
return;
}
if (value instanceof Collection) {
new JSONArray((Collection) value).serialize(target);
return;
}
if (value.getClass().isArray()) {
new JSONArray(value).serialize(target);
return;
}
quote(value.toString(), target);
}
/**
* 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 e) {
/* forget about it */
}
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());
}
/**
* 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 e) { throw new JSONException(e); } } }