Package org.codehaus.jettison.json

Class JSONObject

java.lang.Object

org.codehaus.jettison.json.JSONObject

All Implemented Interfaces:

java.io.Serializable

public class JSONObject
extends java.lang.Object
implements java.io.Serializable

A JSONObject is an unordered collection of name/value pairs. Its external form is a string wrapped in curly braces with colons between the names and values, and commas between the values and names. The internal form is an object having 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 coersion 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 sysntax rules. The constructors are more forgiving in the texts they will accept:

• An extra , (comma) may appear just before the closing brace.
• Strings may be quoted with ' (single quote).
• Strings do not need to be quoted at all if they do not begin with a quote or single quote, and if they do not contain leading or trailing spaces, and if they do not contain any of these characters: { } [ ] / \ : , = ; # and if they do not look like numbers and if they are not the reserved words true, false, or null.
• Keys can be followed by = or => as well as by :.
• Values can be followed by ; (semicolon) as well as by , (comma).
• Numbers may have the 0- (octal) or 0x- (hex) prefix.
• Comments written in the slashshlash, slashstar, and hash conventions will be ignored.

Version:

2

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	JSONObject.Null	JSONObject.NULL is equivalent to the value that JavaScript calls null, whilst Java's null is equivalent to the value that JavaScript calls undefined.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static int	DEFAULT_RECURSION_DEPTH_LIMIT	The default recursion depth limit to prevent stack overflow issues on deeply nested structures.
private boolean	dropRootElement
private boolean	escapeForwardSlashAlways
static java.lang.Object	EXPLICIT_NULL
private java.util.List	ignoredElements
private java.util.LinkedHashMap<java.lang.Object,java.lang.Object>	myHashMap	The hash map where the JSONObject's properties are kept.
static java.lang.Object	NULL	It is sometimes more convenient and less ambiguous to have a NULL object than to use Java's null value.
(package private) static int	RECURSION_DEPTH_LIMIT
private boolean	writeNullAsString

Constructor Summary

Constructors

Modifier	Constructor	Description
	JSONObject()	Construct an empty JSONObject.
	JSONObject(boolean dropRootElement, java.util.List ignoredElements, boolean writeNullAsString, boolean escapeForwardSlash)
	JSONObject(java.lang.Object object, java.lang.String[] names)	Construct a JSONObject from an Object, using reflection to find the public members.
	JSONObject(java.lang.String string)	Construct a JSONObject from a string.
	JSONObject(java.util.List ignoredElements)
	JSONObject(java.util.Map map)	Construct a JSONObject from a Map.
private	JSONObject(java.util.Map map, int recursionDepth)
	JSONObject(JSONObject jo, java.lang.String[] sa)	Construct a JSONObject from a subset of another JSONObject.
	JSONObject(JSONTokener x)	Construct a JSONObject from a JSONTokener.

Method Summary

Modifier and Type	Method	Description
JSONObject	accumulate(java.lang.String key, java.lang.Object value)	Accumulate values under a key.
JSONObject	append(java.lang.String key, java.lang.Object value)	Append values to the array under a key.
private boolean	doGetBoolean(java.lang.String key, java.lang.Object o)
private double	doGetDouble(java.lang.String key, java.lang.Object o)
private int	doGetInt(java.lang.String key, java.lang.Object o)
private long	doGetLong(java.lang.String key, java.lang.Object o)
protected JSONObject	doPut(java.lang.String key, java.lang.Object value, int threshold, boolean checkExistingValue)
static java.lang.String	doubleToString(double d)	Produce a string from a double.
boolean	equals(java.lang.Object obj)
java.lang.Object	get(java.lang.String key)	Get the value object associated with a key.
boolean	getBoolean(java.lang.String key)	Get the boolean value associated with a key.
double	getDouble(java.lang.String key)	Get the double value associated with a key.
static int	getGlobalRecursionDepthLimit()	Get the new recursion depth limit to prevent stack overflow issues on deeply nested structures.
int	getInt(java.lang.String key)	Get the int value associated with a key.
JSONArray	getJSONArray(java.lang.String key)	Get the JSONArray value associated with a key.
JSONObject	getJSONObject(java.lang.String key)	Get the JSONObject value associated with a key.
long	getLong(java.lang.String key)	Get the long value associated with a key.
int	getRecursionDepthLimit()	Deprecated.
java.lang.String	getString(java.lang.String key)	Get the string associated with a key.
boolean	has(java.lang.String key)	Determine if the JSONObject contains a specific key.
int	hashCode()
boolean	isEscapeForwardSlashAlways()
boolean	isNull(java.lang.String key)	Determine if the value associated with the key is null or if there is no value.
java.util.Iterator	keys()	Get an enumeration of the keys of the JSONObject.
int	length()	Get the number of keys stored in the JSONObject.
JSONArray	names()	Produce a JSONArray containing the names of the elements of this JSONObject.
static java.lang.String	numberToString(java.lang.Number n)	Produce a string from a Number.
java.lang.Object	opt(java.lang.String key)	Get an optional value associated with a key.
boolean	optBoolean(java.lang.String key)	Get an optional boolean associated with a key.
boolean	optBoolean(java.lang.String key, boolean defaultValue)	Get an optional boolean associated with a key.
double	optDouble(java.lang.String key)	Get an optional double associated with a key, or NaN if there is no such key or if its value is not a number.
double	optDouble(java.lang.String key, double defaultValue)	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.
int	optInt(java.lang.String key)	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.
int	optInt(java.lang.String key, int defaultValue)	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.
JSONArray	optJSONArray(java.lang.String key)	Get an optional JSONArray associated with a key.
JSONObject	optJSONObject(java.lang.String key)	Get an optional JSONObject associated with a key.
long	optLong(java.lang.String key)	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.
long	optLong(java.lang.String key, long defaultValue)	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.
java.lang.String	optString(java.lang.String key)	Get an optional string associated with a key.
java.lang.String	optString(java.lang.String key, java.lang.String defaultValue)	Get an optional string associated with a key.
JSONObject	put(java.lang.String key, boolean value)	Put a key/boolean pair in the JSONObject.
JSONObject	put(java.lang.String key, double value)	Put a key/double pair in the JSONObject.
JSONObject	put(java.lang.String key, int value)	Put a key/int pair in the JSONObject.
JSONObject	put(java.lang.String key, long value)	Put a key/long pair in the JSONObject.
JSONObject	put(java.lang.String key, java.lang.Object value)	Put a key/value pair in the JSONObject.
JSONObject	put(java.lang.String key, java.util.Collection value)	Put a key/value pair in the JSONObject, where the value will be a JSONArray which is produced from a Collection.
JSONObject	put(java.lang.String key, java.util.Map value)	Put a key/value pair in the JSONObject, where the value will be a JSONObject which is produced from a Map.
JSONObject	putOpt(java.lang.String key, java.lang.Object value)	Put a key/value pair in the JSONObject, but only if the key and the value are both non-null.
static java.lang.String	quote(java.lang.String string)	Produce a string in double quotes with backslash sequences in all the right places.
static java.lang.String	quote(java.lang.String string, boolean escapeForwardSlashAlways)
java.lang.Object	remove(java.lang.String key)	Remove a name and its value, if present.
void	setEscapeForwardSlashAlways(boolean escapeForwardSlashAlways)
static void	setGlobalRecursionDepthLimit(int newRecursionDepthLimit)	Set the new recursion depth limit to prevent stack overflow issues on deeply nested structures.
void	setRecursionDepthLimit(int newRecursionDepthLimit)	Deprecated.
(package private) static void	testValidity(java.lang.Object o)	Throw an exception if the object is an NaN or infinite number.
JSONArray	toJSONArray(JSONArray names)	Produce a JSONArray containing the values of the members of this JSONObject.
java.util.Map	toMap()
java.lang.String	toString()	Make a JSON text of this JSONObject.
java.lang.String	toString(int indentFactor)	Make a prettyprinted JSON text of this JSONObject.
(package private) java.lang.String	toString(int indentFactor, int indent)	Make a prettyprinted JSON text of this JSONObject.
(package private) static java.lang.String	valueToString(java.lang.Object value, boolean escapeForwardSlash)	Make a JSON text of an Object value.
(package private) static java.lang.String	valueToString(java.lang.Object value, int indentFactor, int indent, boolean escapeForwardSlash)	Make a prettyprinted JSON text of an object value.
java.io.Writer	write(java.io.Writer writer)	Write the contents of the JSONObject as JSON text to a writer.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_RECURSION_DEPTH_LIMIT

static final int DEFAULT_RECURSION_DEPTH_LIMIT

The default recursion depth limit to prevent stack overflow issues on deeply nested structures.

See Also:

Constant Field Values

RECURSION_DEPTH_LIMIT

static int RECURSION_DEPTH_LIMIT

myHashMap

private java.util.LinkedHashMap<java.lang.Object,java.lang.Object> myHashMap

The hash map where the JSONObject's properties are kept.

dropRootElement

private boolean dropRootElement

ignoredElements

private java.util.List ignoredElements

writeNullAsString

private boolean writeNullAsString

escapeForwardSlashAlways

private boolean escapeForwardSlashAlways

NULL

public static final java.lang.Object NULL

It is sometimes more convenient and less ambiguous to have a NULL object than to use Java's null value. JSONObject.NULL.equals(null) returns true. JSONObject.NULL.toString() returns "null".

EXPLICIT_NULL

public static final java.lang.Object EXPLICIT_NULL

Constructor Detail

JSONObject

public JSONObject()

Construct an empty JSONObject.

JSONObject

public JSONObject(java.util.List ignoredElements)

JSONObject

public JSONObject(boolean dropRootElement,
                  java.util.List ignoredElements,
                  boolean writeNullAsString,
                  boolean escapeForwardSlash)

JSONObject

public JSONObject(JSONObject jo,
                  java.lang.String[] sa)
           throws JSONException

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.

Parameters:

jo - A JSONObject.

sa - An array of strings.

Throws:

JSONException - If a value is a non-finite number.

JSONObject

public JSONObject(JSONTokener x)
           throws JSONException

Construct a JSONObject from a JSONTokener.

Parameters:

x - A JSONTokener object containing the source string.

Throws:

JSONException - If there is a syntax error in the source string.

JSONObject

public JSONObject(java.util.Map map)
           throws JSONException

Construct a JSONObject from a Map.

Parameters:

map - A map object that can be used to initialize the contents of the JSONObject.

Throws:

JSONException - If there is a syntax error.

JSONObject

private JSONObject(java.util.Map map,
                   int recursionDepth)
            throws JSONException

Throws:

JSONException

JSONObject

public JSONObject(java.lang.Object object,
                  java.lang.String[] names)

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.

Parameters:

object - An object that has fields that should be used to make a JSONObject.

names - An array of strings, the names of the fields to be used from the object.

JSONObject

public JSONObject(java.lang.String string)
           throws JSONException

Construct a JSONObject from a string. This is the most commonly used JSONObject constructor.

Parameters:

string - A string beginning with { (left brace) and ending with } (right brace).

Throws:

JSONException - If there is a syntax error in the source string.

Method Detail

accumulate

public JSONObject accumulate(java.lang.String key,
                             java.lang.Object value)
                      throws JSONException

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.

Parameters:

key - A key string.

value - An object to be accumulated under the key.

Returns:

this.

Throws:

JSONException - If the value is an invalid number or if the key is null.

append

public JSONObject append(java.lang.String key,
                         java.lang.Object value)
                  throws JSONException

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.

Parameters:

key - A key string.

value - An object to be accumulated under the key.

Returns:

this.

Throws:

JSONException - If the key is null or if the current value associated with the key is not a JSONArray.

doubleToString

public static java.lang.String doubleToString(double d)

Produce a string from a double. The string "null" will be returned if the number is not finite.

Parameters:

d - A double.

Returns:

A String.

get

public java.lang.Object get(java.lang.String key)
                     throws JSONException

Get the value object associated with a key.

Parameters:

key - A key string.

Returns:

The object associated with the key.

Throws:

JSONException - if the key is not found.

getBoolean

public boolean getBoolean(java.lang.String key)
                   throws JSONException

Get the boolean value associated with a key.

Parameters:

key - A key string.

Returns:

The truth.

Throws:

JSONException - if the value is not a Boolean or the String "true" or "false".

doGetBoolean

private boolean doGetBoolean(java.lang.String key,
                             java.lang.Object o)
                      throws JSONException

Throws:

JSONException

getDouble

public double getDouble(java.lang.String key)
                 throws JSONException

Get the double value associated with a key.

Parameters:

key - A key string.

Returns:

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.

doGetDouble

private double doGetDouble(java.lang.String key,
                           java.lang.Object o)
                    throws JSONException

Throws:

JSONException

getInt

public int getInt(java.lang.String key)
           throws JSONException

Get the int value associated with a key. If the number value is too large for an int, it will be clipped.

Parameters:

key - A key string.

Returns:

The integer value.

Throws:

JSONException - if the key is not found or if the value cannot be converted to an integer.

doGetInt

private int doGetInt(java.lang.String key,
                     java.lang.Object o)
              throws JSONException

Throws:

JSONException

getJSONArray

public JSONArray getJSONArray(java.lang.String key)
                       throws JSONException

Get the JSONArray value associated with a key.

Parameters:

key - A key string.

Returns:

A JSONArray which is the value.

Throws:

JSONException - if the key is not found or if the value is not a JSONArray.

getJSONObject

public JSONObject getJSONObject(java.lang.String key)
                         throws JSONException

Get the JSONObject value associated with a key.

Parameters:

key - A key string.

Returns:

A JSONObject which is the value.

Throws:

JSONException - if the key is not found or if the value is not a JSONObject.

getLong

public long getLong(java.lang.String key)
             throws JSONException

Get the long value associated with a key. If the number value is too long for a long, it will be clipped.

Parameters:

key - A key string.

Returns:

The long value.

Throws:

JSONException - if the key is not found or if the value cannot be converted to a long.

doGetLong

private long doGetLong(java.lang.String key,
                       java.lang.Object o)
                throws JSONException

Throws:

JSONException

getString

public java.lang.String getString(java.lang.String key)
                           throws JSONException

Get the string associated with a key.

Parameters:

key - A key string.

Returns:

A string which is the value.

Throws:

JSONException - if the key is not found.

has

public boolean has(java.lang.String key)

Determine if the JSONObject contains a specific key.

Parameters:

key - A key string.

Returns:

true if the key exists in the JSONObject.

isNull

public boolean isNull(java.lang.String key)

Determine if the value associated with the key is null or if there is no value.

Parameters:

key - A key string.

Returns:

true if there is no value associated with the key or if the value is the JSONObject.NULL object.

keys

public java.util.Iterator keys()

Get an enumeration of the keys of the JSONObject.

Returns:

An iterator of the keys.

length

public int length()

Get the number of keys stored in the JSONObject.

Returns:

The number of keys in the JSONObject.

names

public JSONArray names()

Produce a JSONArray containing the names of the elements of this JSONObject.

Returns:

A JSONArray containing the key strings, or null if the JSONObject is empty.

numberToString

public static java.lang.String numberToString(java.lang.Number n)
                                       throws JSONException

Produce a string from a Number.

Parameters:

n - A Number

Returns:

A String.

Throws:

JSONException - If n is a non-finite number.

opt

public java.lang.Object opt(java.lang.String key)

Get an optional value associated with a key.

Parameters:

key - A key string.

Returns:

An object which is the value, or null if there is no value.

optBoolean

public boolean optBoolean(java.lang.String 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".

Parameters:

key - A key string.

Returns:

The truth.

optBoolean

public boolean optBoolean(java.lang.String key,
                          boolean defaultValue)

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).

Parameters:

key - A key string.

defaultValue - The default.

Returns:

The truth.

put

public JSONObject put(java.lang.String key,
                      java.util.Collection value)
               throws JSONException

Put a key/value pair in the JSONObject, where the value will be a JSONArray which is produced from a Collection.

Parameters:

key - A key string.

value - A Collection value.

Returns:

this.

Throws:

JSONException - JSONException

optDouble

public double optDouble(java.lang.String key)

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.

Parameters:

key - A string which is the key.

Returns:

An object which is the value.

optDouble

public double optDouble(java.lang.String key,
                        double defaultValue)

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.

Parameters:

key - A key string.

defaultValue - The default.

Returns:

An object which is the value.

optInt

public int optInt(java.lang.String key)

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.

Parameters:

key - A key string.

Returns:

An object which is the value.

optInt

public int optInt(java.lang.String key,
                  int defaultValue)

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.

Parameters:

key - A key string.

defaultValue - The default.

Returns:

An object which is the value.

optJSONArray

public JSONArray optJSONArray(java.lang.String key)

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.

Parameters:

key - A key string.

Returns:

A JSONArray which is the value.

optJSONObject

public JSONObject optJSONObject(java.lang.String key)

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.

Parameters:

key - A key string.

Returns:

A JSONObject which is the value.

optLong

public long optLong(java.lang.String key)

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.

Parameters:

key - A key string.

Returns:

An object which is the value.

optLong

public long optLong(java.lang.String key,
                    long defaultValue)

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.

Parameters:

key - A key string.

defaultValue - The default.

Returns:

An object which is the value.

optString

public java.lang.String optString(java.lang.String key)

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.

Parameters:

key - A key string.

Returns:

A string which is the value.

optString

public java.lang.String optString(java.lang.String key,
                                  java.lang.String defaultValue)

Get an optional string associated with a key. It returns the defaultValue if there is no such key.

Parameters:

key - A key string.

defaultValue - The default.

Returns:

A string which is the value.

put

public JSONObject put(java.lang.String key,
                      boolean value)
               throws JSONException

Put a key/boolean pair in the JSONObject.

Parameters:

key - A key string.

value - A boolean which is the value.

Returns:

this.

Throws:

JSONException - If the key is null.

put

public JSONObject put(java.lang.String key,
                      double value)
               throws JSONException

Put a key/double pair in the JSONObject.

Parameters:

key - A key string.

value - A double which is the value.

Returns:

this.

Throws:

JSONException - If the key is null or if the number is invalid.

put

public JSONObject put(java.lang.String key,
                      int value)
               throws JSONException

Put a key/int pair in the JSONObject.

Parameters:

key - A key string.

value - An int which is the value.

Returns:

this.

Throws:

JSONException - If the key is null.

put

public JSONObject put(java.lang.String key,
                      long value)
               throws JSONException

Put a key/long pair in the JSONObject.

Parameters:

key - A key string.

value - A long which is the value.

Returns:

this.

Throws:

JSONException - If the key is null.

put

public JSONObject put(java.lang.String key,
                      java.util.Map value)
               throws JSONException

Put a key/value pair in the JSONObject, where the value will be a JSONObject which is produced from a Map.

Parameters:

key - A key string.

value - A Map value.

Returns:

this.

Throws:

JSONException - JSONException

put

public JSONObject put(java.lang.String key,
                      java.lang.Object value)
               throws JSONException

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.

Parameters:

key - A key string.

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.

Returns:

this.

Throws:

JSONException - If the value is non-finite number or if the key is null.

doPut

protected JSONObject doPut(java.lang.String key,
                           java.lang.Object value,
                           int threshold,
                           boolean checkExistingValue)
                    throws JSONException

Throws:

JSONException

putOpt

public JSONObject putOpt(java.lang.String key,
                         java.lang.Object value)
                  throws JSONException

Put a key/value pair in the JSONObject, but only if the key and the value are both non-null.

Parameters:

key - A key string.

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.

Returns:

this.

Throws:

JSONException - If the value is a non-finite number.

quote

public static java.lang.String quote(java.lang.String string)

Produce a string in double quotes with backslash sequences in all the right places. A backslash will be inserted within </, allowing JSON text to be delivered in HTML. In JSON text, a string cannot contain a control character or an unescaped quote or backslash.

Parameters:

string - A String

Returns:

A String correctly formatted for insertion in a JSON text.

quote

public static java.lang.String quote(java.lang.String string,
                                     boolean escapeForwardSlashAlways)

remove

public java.lang.Object remove(java.lang.String key)

Remove a name and its value, if present.

Parameters:

key - The name to be removed.

Returns:

The value that was associated with the name, or null if there was no value.

testValidity

static void testValidity(java.lang.Object o)
                  throws JSONException

Throw an exception if the object is an NaN or infinite number.

Parameters:

o - The object to test.

Throws:

JSONException - If o is a non-finite number.

toJSONArray

public JSONArray toJSONArray(JSONArray names)
                      throws JSONException

Produce a JSONArray containing the values of the members of this JSONObject.

Parameters:

names - A JSONArray containing a list of key strings. This determines the sequence of the values in the result.

Returns:

A JSONArray of values.

Throws:

JSONException - If any of the values are non-finite numbers.

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

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.

Overrides:

toString in class java.lang.Object

Returns:

a printable, displayable, portable, transmittable representation of the object, beginning with { (left brace) and ending with } (right brace).

toString

public java.lang.String toString(int indentFactor)
                          throws JSONException

Make a prettyprinted JSON text of this JSONObject.

Warning: This method assumes that the data structure is acyclical.

Parameters:

indentFactor - The number of spaces to add to each level of indentation.

Returns:

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.

toString

java.lang.String toString(int indentFactor,
                          int indent)
                   throws JSONException

Make a prettyprinted JSON text of this JSONObject.

Warning: This method assumes that the data structure is acyclical.

Parameters:

indentFactor - The number of spaces to add to each level of indentation.

indent - The indentation of the top level.

Returns:

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.

valueToString

static java.lang.String valueToString(java.lang.Object value,
                                      boolean escapeForwardSlash)
                               throws JSONException

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 the rules.

Warning: This method assumes that the data structure is acyclical.

Parameters:

value - The value to be serialized.

Returns:

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.

valueToString

static java.lang.String valueToString(java.lang.Object value,
                                      int indentFactor,
                                      int indent,
                                      boolean escapeForwardSlash)
                               throws JSONException

Make a prettyprinted JSON text of an object value.

Warning: This method assumes that the data structure is acyclical.

Parameters:

value - The value to be serialized.

indentFactor - The number of spaces to add to each level of indentation.

indent - The indentation of the top level.

Returns:

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.

setGlobalRecursionDepthLimit

public static void setGlobalRecursionDepthLimit(int newRecursionDepthLimit)

Set the new recursion depth limit to prevent stack overflow issues on deeply nested structures. The default value is 500

Parameters:

newRecursionDepthLimit - the new recursion depth limit to set

setRecursionDepthLimit

@Deprecated
public void setRecursionDepthLimit(int newRecursionDepthLimit)

Deprecated.

Set the new recursion depth limit to prevent stack overflow issues on deeply nested structures. The default value is 500

Parameters:

newRecursionDepthLimit - the new recursion depth limit to set

getGlobalRecursionDepthLimit

public static int getGlobalRecursionDepthLimit()

Get the new recursion depth limit to prevent stack overflow issues on deeply nested structures. The default value is 500

Returns:

the recursion depth limit

getRecursionDepthLimit

@Deprecated
public int getRecursionDepthLimit()

Deprecated.

Get the new recursion depth limit to prevent stack overflow issues on deeply nested structures. The default value is 500

Returns:

the recursion depth limit

write

public java.io.Writer write(java.io.Writer writer)
                     throws JSONException

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.

Parameters:

writer - The writer

Returns:

The writer.

Throws:

JSONException - JSONException

isEscapeForwardSlashAlways

public boolean isEscapeForwardSlashAlways()

setEscapeForwardSlashAlways

public void setEscapeForwardSlashAlways(boolean escapeForwardSlashAlways)

toMap

public java.util.Map toMap()