package net.thesocialos.server.json;
/*
* Copyright (c) 2002 JSON.org Permission is hereby granted, free of charge, to any person obtaining a copy of this
* software and associated documentation files (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
* Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The
* above copyright notice and this permission notice shall be included in all copies or substantial portions of the
* Software. The Software shall be used for Good, not Evil. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
* KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
import java.io.IOException;
import java.io.Writer;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.ResourceBundle;
/**
* A JSONObject is an unordered collection of name/value pairs. Its external form is a string wrapped in curly braces
* with colons between the names and values, and commas between the values and names. The internal form is an object
* having <code>get</code> and <code>opt</code> methods for accessing the values by name, and <code>put</code> methods
* for adding or replacing values by name. The values can be any of these types: <code>Boolean</code>,
* <code>JSONArray</code>, <code>JSONObject</code>, <code>Number</code>, <code>String</code>, or the
* <code>JSONObject.NULL</code> object. A JSONObject constructor can be used to convert an external form JSON text into
* an internal form whose values can be retrieved with the <code>get</code> and <code>opt</code> methods, or to convert
* values into a JSON text using the <code>put</code> and <code>toString</code> methods. A <code>get</code> method
* returns a value if one can be found, and throws an exception if one cannot be found. An <code>opt</code> method
* returns a default value instead of throwing an exception, and so is useful for obtaining optional values.
* <p>
* The generic <code>get()</code> and <code>opt()</code> methods return an object, which you can cast or query for type.
* There are also typed <code>get</code> and <code>opt</code> methods that do type checking and type coercion for you.
* The opt methods differ from the get methods in that they do not throw. Instead, they return a specified value, such
* as null.
* <p>
* The <code>put</code> methods add or replace values in an object. For example,
*
* <pre>
* myString = new JSONObject().put("JSON", "Hello, World!").toString();
* </pre>
*
* produces the string <code>{"JSON": "Hello, World"}</code>.
* <p>
* The texts produced by the <code>toString</code> methods strictly conform to the JSON syntax rules. The constructors
* are more forgiving in the texts they will accept:
* <ul>
* <li>An extra <code>,</code> <small>(comma)</small> may appear just before the closing brace.</li>
* <li>Strings may be quoted with <code>'</code> <small>(single quote)</small>.</li>
* <li>Strings do not need to be quoted at all if they do not begin with a quote or single quote, and if they do not
* contain leading or trailing spaces, and if they do not contain any of these characters:
* <code>{ } [ ] / \ : , = ; #</code> and if they do not look like numbers and if they are not the reserved words
* <code>true</code>, <code>false</code>, or <code>null</code>.</li>
* <li>Keys can be followed by <code>=</code> or <code>=></code> as well as by <code>:</code>.</li>
* <li>Values can be followed by <code>;</code> <small>(semicolon)</small> as well as by <code>,</code>
* <small>(comma)</small>.</li>
* </ul>
*
* @author JSON.org
* @version 2011-11-24
*/
public class JSONObject {
/**
* JSONObject.NULL is equivalent to the value that JavaScript calls null, whilst Java's null is equivalent to the
* value that JavaScript calls undefined.
*/
private static final class Null {
/**
* There is only intended to be a single instance of the NULL object, so the clone method returns itself.
*
* @return NULL.
*/
@Override
protected final Object clone() {
return this;
}
/**
* A Null object is equal to the null value and to itself.
*
* @param object
* An object to test for nullness.
* @return true if the object parameter is the JSONObject.NULL object or null.
*/
@Override
public boolean equals(Object object) {
return object == null || object == this;
}
/**
* Get the "null" string value.
*
* @return The string "null".
*/
@Override
public String toString() {
return "null";
}
}
/**
* Produce a string from a double. The string "null" will be returned if the number is not finite.
*
* @param d
* A double.
* @return A String.
*/
public static String doubleToString(double d) {
if (Double.isInfinite(d) || Double.isNaN(d)) return "null";
// Shave off trailing zeros and decimal point, if possible.
String string = Double.toString(d);
if (string.indexOf('.') > 0 && string.indexOf('e') < 0 && string.indexOf('E') < 0) {
while (string.endsWith("0"))
string = string.substring(0, string.length() - 1);
if (string.endsWith(".")) string = string.substring(0, string.length() - 1);
}
return string;
}
/**
* The map where the JSONObject's properties are kept.
*/
private final Map map;
/**
* It is sometimes more convenient and less ambiguous to have a <code>NULL</code> object than to use Java's
* <code>null</code> value. <code>JSONObject.NULL.equals(null)</code> returns <code>true</code>.
* <code>JSONObject.NULL.toString()</code> returns <code>"null"</code>.
*/
public static final Object NULL = new Null();
/**
* Get an array of field names from a JSONObject.
*
* @return An array of field names, or null if there are no names.
*/
public static String[] getNames(JSONObject jo) {
int length = jo.length();
if (length == 0) return null;
Iterator iterator = jo.keys();
String[] names = new String[length];
int i = 0;
while (iterator.hasNext()) {
names[i] = (String) iterator.next();
i += 1;
}
return names;
}
/**
* Get an array of field names from an Object.
*
* @return An array of field names, or null if there are no names.
*/
public static String[] getNames(Object object) {
if (object == null) return null;
Class klass = object.getClass();
Field[] fields = klass.getFields();
int length = fields.length;
if (length == 0) return null;
String[] names = new String[length];
for (int i = 0; i < length; i += 1)
names[i] = fields[i].getName();
return names;
}
/**
* Produce a string from a Number.
*
* @param number
* A Number
* @return A String.
* @throws JSONException
* If n is a non-finite number.
*/
public static String numberToString(Number number) throws JSONException {
if (number == null) throw new JSONException("Null pointer");
testValidity(number);
// Shave off trailing zeros and decimal point, if possible.
String string = number.toString();
if (string.indexOf('.') > 0 && string.indexOf('e') < 0 && string.indexOf('E') < 0) {
while (string.endsWith("0"))
string = string.substring(0, string.length() - 1);
if (string.endsWith(".")) string = string.substring(0, string.length() - 1);
}
return string;
}
/**
* Produce a string in double quotes with backslash sequences in all the right places. A backslash will be inserted
* within </, producing <\/, allowing JSON text to be delivered in HTML. In JSON text, a string cannot contain a
* control character or an unescaped quote or backslash.
*
* @param string
* A String
* @return A String correctly formatted for insertion in a JSON text.
*/
public static String quote(String string) {
if (string == null || string.length() == 0) return "\"\"";
char b;
char c = 0;
String hhhh;
int i;
int len = string.length();
StringBuffer sb = new StringBuffer(len + 4);
sb.append('"');
for (i = 0; i < len; i += 1) {
b = c;
c = string.charAt(i);
switch (c) {
case '\\':
case '"':
sb.append('\\');
sb.append(c);
break;
case '/':
if (b == '<') sb.append('\\');
sb.append(c);
break;
case '\b':
sb.append("\\b");
break;
case '\t':
sb.append("\\t");
break;
case '\n':
sb.append("\\n");
break;
case '\f':
sb.append("\\f");
break;
case '\r':
sb.append("\\r");
break;
default:
if (c < ' ' || (c >= '\u0080' && c < '\u00a0') || (c >= '\u2000' && c < '\u2100')) {
hhhh = "000" + Integer.toHexString(c);
sb.append("\\u" + hhhh.substring(hhhh.length() - 4));
} else
sb.append(c);
}
}
sb.append('"');
return sb.toString();
}
/**
* Try to convert a string into a number, boolean, or null. If the string can't be converted, return the string.
*
* @param string
* A String.
* @return A simple JSON value.
*/
public static Object stringToValue(String string) {
Double d;
if (string.equals("")) return string;
if (string.equalsIgnoreCase("true")) return Boolean.TRUE;
if (string.equalsIgnoreCase("false")) return Boolean.FALSE;
if (string.equalsIgnoreCase("null")) return JSONObject.NULL;
/*
* If it might be a number, try converting it. If a number cannot be produced, then the value will just be a
* string. Note that the plus and implied string conventions are non-standard. A JSON parser may accept non-JSON
* forms as long as it accepts all correct JSON forms.
*/
char b = string.charAt(0);
if ((b >= '0' && b <= '9') || b == '.' || b == '-' || b == '+') try {
if (string.indexOf('.') > -1 || string.indexOf('e') > -1 || string.indexOf('E') > -1) {
d = Double.valueOf(string);
if (!d.isInfinite() && !d.isNaN()) return d;
} else {
Long myLong = new Long(string);
if (myLong.longValue() == myLong.intValue()) return new Integer(myLong.intValue());
else
return myLong;
}
} catch (Exception ignore) {
ignore.printStackTrace();
}
return string;
}
/**
* Throw an exception if the object is a NaN or infinite number.
*
* @param o
* The object to test.
* @throws JSONException
* If o is a non-finite number.
*/
public 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.");
}
/**
* Make a JSON text of an Object value. If the object has an value.toJSONString() method, then that method will be
* used to produce the JSON text. The method is required to produce a strictly conforming text. If the object does
* not contain a toJSONString method (which is the most common case), then a text will be produced by other means.
* If the value is an array or Collection, then a JSONArray will be made from it and its toJSONString method will be
* called. If the value is a MAP, then a JSONObject will be made from it and its toJSONString method will be called.
* Otherwise, the value's toString method will be called, and the result will be quoted.
*
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @param value
* The value to be serialized.
* @return a printable, displayable, transmittable representation of the object, beginning with <code>{</code>
* <small>(left brace)</small> and ending with <code>}</code> <small>(right brace)</small>.
* @throws JSONException
* If the value is or contains an invalid number.
*/
public static String valueToString(Object value) throws JSONException {
if (value == null || value.equals(null)) return "null";
if (value instanceof JSONString) {
Object object;
try {
object = ((JSONString) value).toJSONString();
} catch (Exception e) {
throw new JSONException(e);
}
if (object instanceof String) return (String) object;
throw new JSONException("Bad value from toJSONString: " + object);
}
if (value instanceof Number) return numberToString((Number) value);
if (value instanceof Boolean || value instanceof JSONObject || value instanceof JSONArray)
return value.toString();
if (value instanceof Map) return new JSONObject((Map) value).toString();
if (value instanceof Collection) return new JSONArray((Collection) value).toString();
if (value.getClass().isArray()) return new JSONArray(value).toString();
return quote(value.toString());
}
/**
* Make a prettyprinted JSON text of an object value.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @param value
* The value to be serialized.
* @param indentFactor
* The number of spaces to add to each level of indentation.
* @param indent
* The indentation of the top level.
* @return a printable, displayable, transmittable representation of the object, beginning with <code>{</code>
* <small>(left brace)</small> and ending with <code>}</code> <small>(right brace)</small>.
* @throws JSONException
* If the object contains an invalid number.
*/
static String valueToString(Object value, int indentFactor, int indent) throws JSONException {
if (value == null || value.equals(null)) return "null";
try {
if (value instanceof JSONString) {
Object o = ((JSONString) value).toJSONString();
if (o instanceof String) return (String) o;
}
} catch (Exception ignore) {
ignore.printStackTrace();
}
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
*/
public static Object wrap(Object object) {
try {
if (object == null) return NULL;
if (object instanceof JSONObject || object instanceof JSONArray || NULL.equals(object)
|| object instanceof JSONString || object instanceof Byte || object instanceof Character
|| object instanceof Short || object instanceof Integer || object instanceof Long
|| object instanceof Boolean || object instanceof Float || object instanceof Double
|| object instanceof String) return object;
if (object instanceof Collection) return new JSONArray((Collection) object);
if (object.getClass().isArray()) return new JSONArray(object);
if (object instanceof Map) return new JSONObject((Map) object);
Package objectPackage = object.getClass().getPackage();
String objectPackageName = objectPackage != null ? objectPackage.getName() : "";
if (objectPackageName.startsWith("java.") || objectPackageName.startsWith("javax.")
|| object.getClass().getClassLoader() == null) return object.toString();
return new JSONObject(object);
} catch (Exception exception) {
return null;
}
}
/**
* Construct an empty JSONObject.
*/
public JSONObject() {
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 (String name : names)
try {
putOnce(name, jo.opt(name));
} catch (Exception ignore) {
ignore.printStackTrace();
}
}
/**
* Construct a JSONObject from a JSONTokener.
*
* @param x
* A JSONTokener object containing the source string.
* @throws JSONException
* If there is a syntax error in the source string or a duplicated key.
*/
public JSONObject(JSONTokener x) throws JSONException {
this();
char c;
String key;
if (x.nextClean() != '{') throw x.syntaxError("A JSONObject text must begin with '{'");
for (;;) {
c = x.nextClean();
switch (c) {
case 0:
throw x.syntaxError("A JSONObject text must end with '}'");
case '}':
return;
default:
x.back();
key = x.nextValue().toString();
}
// The key is followed by ':'. We will also tolerate '=' or '=>'.
c = x.nextClean();
if (c == '=') {
if (x.next() != '>') x.back();
} else if (c != ':') throw x.syntaxError("Expected a ':' after a key");
putOnce(key, x.nextValue());
// Pairs are separated by ','. We will also tolerate ';'.
switch (x.nextClean()) {
case ';':
case ',':
if (x.nextClean() == '}') return;
x.back();
break;
case '}':
return;
default:
throw x.syntaxError("Expected a ',' or '}'");
}
}
}
/**
* Construct a JSONObject from a Map.
*
* @param map
* A map object that can be used to initialize the contents of the JSONObject.
* @throws JSONException
*/
public JSONObject(Map map) {
this.map = new HashMap();
if (map != null) {
Iterator i = map.entrySet().iterator();
while (i.hasNext()) {
Map.Entry e = (Map.Entry) i.next();
Object value = e.getValue();
if (value != null) this.map.put(e.getKey(), wrap(value));
}
}
}
/**
* Construct a JSONObject from an Object using bean getters. It reflects on all of the public methods of the object.
* For each of the methods with no parameters and a name starting with <code>"get"</code> or <code>"is"</code>
* followed by an uppercase letter, the method is invoked, and a key and the value returned from the getter method
* are put into the new JSONObject.
*
* The key is formed by removing the <code>"get"</code> or <code>"is"</code> prefix. If the second remaining
* character is not upper case, then the first character is converted to lower case.
*
* For example, if an object has a method named <code>"getName"</code>, and if the result of calling
* <code>object.getName()</code> is <code>"Larry Fine"</code>, then the JSONObject will contain
* <code>"name": "Larry Fine"</code>.
*
* @param bean
* An object that has getter methods that should be used to make a JSONObject.
*/
public JSONObject(Object bean) {
this();
populateMap(bean);
}
/**
* Construct a JSONObject from an Object, using reflection to find the public members. The resulting JSONObject's
* keys will be the strings from the names array, and the values will be the field values associated with those keys
* in the object. If a key is not found or not visible, then it will not be copied into the new JSONObject.
*
* @param object
* An object that has fields that should be used to make a JSONObject.
* @param names
* An array of strings, the names of the fields to be obtained from the object.
*/
public JSONObject(Object object, String names[]) {
this();
Class c = object.getClass();
for (String name : names)
try {
putOpt(name, c.getField(name).get(object));
} catch (Exception ignore) {
ignore.printStackTrace();
}
}
/**
* Construct a JSONObject from a source JSON text string. This is the most commonly used JSONObject constructor.
*
* @param source
* A string beginning with <code>{</code> <small>(left brace)</small> and ending with <code>}</code>
* <small>(right brace)</small>.
* @exception JSONException
* If there is a syntax error in the source string or a duplicated key.
*/
public JSONObject(String source) throws JSONException {
this(new JSONTokener(source));
}
/**
* Construct a JSONObject from a ResourceBundle.
*
* @param baseName
* The ResourceBundle base name.
* @param locale
* The Locale to load the ResourceBundle for.
* @throws JSONException
* If any JSONExceptions are detected.
*/
public JSONObject(String baseName, Locale locale) throws JSONException {
this();
ResourceBundle bundle = ResourceBundle.getBundle(baseName, locale, Thread.currentThread()
.getContextClassLoader());
// Iterate through the keys in the bundle.
Enumeration keys = bundle.getKeys();
while (keys.hasMoreElements()) {
Object key = keys.nextElement();
if (key instanceof String) {
// Go through the path, ensuring that there is a nested JSONObject for each
// segment except the last. Add the value using the last segment's name into
// the deepest nested JSONObject.
String[] path = ((String) key).split("\\.");
int last = path.length - 1;
JSONObject target = this;
for (int i = 0; i < last; i += 1) {
String segment = path[i];
JSONObject nextTarget = target.optJSONObject(segment);
if (nextTarget == null) {
nextTarget = new JSONObject();
target.put(segment, nextTarget);
}
target = nextTarget;
}
target.put(path[last], bundle.getString((String) key));
}
}
}
/**
* Accumulate values under a key. It is similar to the put method except that if there is already an object stored
* under the key then a JSONArray is stored under the key to hold all of the accumulated values. If there is already
* a JSONArray, then the new value is appended to it. In contrast, the put method replaces the previous value.
*
* If only one value is accumulated that is not a JSONArray, then the result will be the same as using put. But if
* multiple values are accumulated, then the result will be like append.
*
* @param key
* A key string.
* @param value
* An object to be accumulated under the key.
* @return this.
* @throws JSONException
* If the value is an invalid number or if the key is null.
*/
public JSONObject accumulate(String key, Object value) throws JSONException {
testValidity(value);
Object object = opt(key);
if (object == null) this.put(key, value instanceof JSONArray ? new JSONArray().put(value) : value);
else if (object instanceof JSONArray) ((JSONArray) object).put(value);
else
this.put(key, new JSONArray().put(object).put(value));
return this;
}
/**
* Append values to the array under a key. If the key does not exist in the JSONObject, then the key is put in the
* JSONObject with its value being a JSONArray containing the value parameter. If the key was already associated
* with a JSONArray, then the value parameter is appended to it.
*
* @param key
* A key string.
* @param value
* An object to be accumulated under the key.
* @return this.
* @throws JSONException
* If the key is null or if the current value associated with the key is not a JSONArray.
*/
public JSONObject append(String key, Object value) throws JSONException {
testValidity(value);
Object object = opt(key);
if (object == null) this.put(key, new JSONArray().put(value));
else if (object instanceof JSONArray) this.put(key, ((JSONArray) object).put(value));
else
throw new JSONException("JSONObject[" + key + "] is not a JSONArray.");
return this;
}
/**
* Get the value object associated with a key.
*
* @param key
* A key string.
* @return The object associated with the key.
* @throws JSONException
* if the key is not found.
*/
public Object get(String key) throws JSONException {
if (key == null) throw new JSONException("Null key.");
Object object = opt(key);
if (object == null) throw new JSONException("JSONObject[" + quote(key) + "] not found.");
return object;
}
/**
* Get the boolean value associated with a key.
*
* @param key
* A key string.
* @return The truth.
* @throws JSONException
* if the value is not a Boolean or the String "true" or "false".
*/
public boolean getBoolean(String key) throws JSONException {
Object object = get(key);
if (object.equals(Boolean.FALSE) || (object instanceof String && ((String) object).equalsIgnoreCase("false"))) return false;
else if (object.equals(Boolean.TRUE)
|| (object instanceof String && ((String) object).equalsIgnoreCase("true"))) return true;
throw new JSONException("JSONObject[" + quote(key) + "] is not a Boolean.");
}
/**
* Get the double value associated with a key.
*
* @param key
* A key string.
* @return The numeric value.
* @throws JSONException
* if the key is not found or if the value is not a Number object and cannot be converted to a number.
*/
public double getDouble(String key) throws JSONException {
Object object = get(key);
try {
return object instanceof Number ? ((Number) object).doubleValue() : Double.parseDouble((String) object);
} catch (Exception e) {
throw new JSONException("JSONObject[" + quote(key) + "] is not a number.");
}
}
/**
* Get the int value associated with a key.
*
* @param key
* A key string.
* @return The integer value.
* @throws JSONException
* if the key is not found or if the value cannot be converted to an integer.
*/
public int getInt(String key) throws JSONException {
Object object = get(key);
try {
return object instanceof Number ? ((Number) object).intValue() : Integer.parseInt((String) object);
} catch (Exception e) {
throw new JSONException("JSONObject[" + quote(key) + "] is not an int.");
}
}
/**
* Get the JSONArray value associated with a key.
*
* @param key
* A key string.
* @return A JSONArray which is the value.
* @throws JSONException
* if the key is not found or if the value is not a JSONArray.
*/
public JSONArray getJSONArray(String key) throws JSONException {
Object object = get(key);
if (object instanceof JSONArray) return (JSONArray) object;
throw new JSONException("JSONObject[" + quote(key) + "] is not a JSONArray.");
}
/**
* Get the JSONObject value associated with a key.
*
* @param key
* A key string.
* @return A JSONObject which is the value.
* @throws JSONException
* if the key is not found or if the value is not a JSONObject.
*/
public JSONObject getJSONObject(String key) throws JSONException {
Object object = get(key);
if (object instanceof JSONObject) return (JSONObject) object;
throw new JSONException("JSONObject[" + quote(key) + "] is not a JSONObject.");
}
/**
* Get the long value associated with a key.
*
* @param key
* A key string.
* @return The long value.
* @throws JSONException
* if the key is not found or if the value cannot be converted to a long.
*/
public long getLong(String key) throws JSONException {
Object object = get(key);
try {
return object instanceof Number ? ((Number) object).longValue() : Long.parseLong((String) object);
} catch (Exception e) {
throw new JSONException("JSONObject[" + quote(key) + "] is not a long.");
}
}
/**
* Get the string associated with a key.
*
* @param key
* A key string.
* @return A string which is the value.
* @throws JSONException
* if there is no string value for the key.
*/
public String getString(String key) throws JSONException {
Object object = get(key);
if (object instanceof String) return (String) object;
throw new JSONException("JSONObject[" + quote(key) + "] not a string.");
}
/**
* 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 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) this.put(key, 1);
else if (value instanceof Integer) this.put(key, ((Integer) value).intValue() + 1);
else if (value instanceof Long) this.put(key, ((Long) value).longValue() + 1);
else if (value instanceof Double) this.put(key, ((Double) value).doubleValue() + 1);
else if (value instanceof Float) this.put(key, ((Float) value).floatValue() + 1);
else
throw new JSONException("Unable to increment [" + quote(key) + "].");
return this;
}
/**
* Determine if the value associated with the key is null or if there is no value.
*
* @param key
* A key string.
* @return true if there is no value associated with the key or if the value is the JSONObject.NULL object.
*/
public boolean isNull(String key) {
return JSONObject.NULL.equals(opt(key));
}
/**
* Get an enumeration of the keys of the JSONObject.
*
* @return An iterator of the keys.
*/
public Iterator keys() {
return map.keySet().iterator();
}
/**
* Get the number of keys stored in the JSONObject.
*
* @return The number of keys in the JSONObject.
*/
public int length() {
return 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;
}
/**
* 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 : 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 this.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 this.optDouble(key, Double.NaN);
}
/**
* Get an optional double associated with a key, or the defaultValue if there is no such key or if its value is not
* a number. If the value is a string, an attempt will be made to evaluate it as a number.
*
* @param key
* A key string.
* @param defaultValue
* The default.
* @return An object which is the value.
*/
public double optDouble(String key, double defaultValue) {
try {
return getDouble(key);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Get an optional int value associated with a key, or zero if there is no such key or if the value is not a number.
* If the value is a string, an attempt will be made to evaluate it as a number.
*
* @param key
* A key string.
* @return An object which is the value.
*/
public int optInt(String key) {
return this.optInt(key, 0);
}
/**
* Get an optional int value associated with a key, or the default if there is no such key or if the value is not a
* number. If the value is a string, an attempt will be made to evaluate it as a number.
*
* @param key
* A key string.
* @param defaultValue
* The default.
* @return An object which is the value.
*/
public int optInt(String key, int defaultValue) {
try {
return getInt(key);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Get an optional JSONArray associated with a key. It returns null if there is no such key, or if its value is not
* a JSONArray.
*
* @param key
* A key string.
* @return A JSONArray which is the value.
*/
public JSONArray optJSONArray(String key) {
Object o = opt(key);
return o instanceof JSONArray ? (JSONArray) o : null;
}
/**
* Get an optional JSONObject associated with a key. It returns null if there is no such key, or if its value is not
* a JSONObject.
*
* @param key
* A key string.
* @return A JSONObject which is the value.
*/
public JSONObject optJSONObject(String key) {
Object object = opt(key);
return object instanceof JSONObject ? (JSONObject) object : null;
}
/**
* Get an optional long value associated with a key, or zero if there is no such key or if the value is not a
* number. If the value is a string, an attempt will be made to evaluate it as a number.
*
* @param key
* A key string.
* @return An object which is the value.
*/
public long optLong(String key) {
return this.optLong(key, 0);
}
/**
* Get an optional long value associated with a key, or the default if there is no such key or if the value is not a
* number. If the value is a string, an attempt will be made to evaluate it as a number.
*
* @param key
* A key string.
* @param defaultValue
* The default.
* @return An object which is the value.
*/
public long optLong(String key, long defaultValue) {
try {
return getLong(key);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Get an optional string associated with a key. It returns an empty string if there is no such key. If the value is
* not a string and is not null, then it is converted to a string.
*
* @param key
* A key string.
* @return A string which is the value.
*/
public String optString(String key) {
return this.optString(key, "");
}
/**
* Get an optional string associated with a key. It returns the defaultValue if there is no such key.
*
* @param key
* A key string.
* @param defaultValue
* The default.
* @return A string which is the value.
*/
public String optString(String key, String defaultValue) {
Object object = opt(key);
return NULL.equals(object) ? defaultValue : object.toString();
}
private void populateMap(Object bean) {
Class klass = bean.getClass();
// If klass is a System class then set includeSuperClass to false.
boolean includeSuperClass = klass.getClassLoader() != null;
Method[] methods = includeSuperClass ? klass.getMethods() : klass.getDeclaredMethods();
for (Method method : methods)
try {
if (Modifier.isPublic(method.getModifiers())) {
String name = method.getName();
String key = "";
if (name.startsWith("get")) {
if ("getClass".equals(name) || "getDeclaringClass".equals(name)) key = "";
else
key = name.substring(3);
} else if (name.startsWith("is")) key = name.substring(2);
if (key.length() > 0 && Character.isUpperCase(key.charAt(0))
&& method.getParameterTypes().length == 0) {
if (key.length() == 1) key = key.toLowerCase();
else if (!Character.isUpperCase(key.charAt(1)))
key = key.substring(0, 1).toLowerCase() + key.substring(1);
Object result = method.invoke(bean, (Object[]) null);
if (result != null) map.put(key, wrap(result));
}
}
} catch (Exception ignore) {
ignore.printStackTrace();
}
}
/**
* 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 {
this.put(key, value ? Boolean.TRUE : Boolean.FALSE);
return this;
}
/**
* Put a key/value pair in the JSONObject, where the value will be a JSONArray which is produced from a Collection.
*
* @param key
* A key string.
* @param value
* A Collection value.
* @return this.
* @throws JSONException
*/
public JSONObject put(String key, Collection value) throws JSONException {
this.put(key, new JSONArray(value));
return this;
}
/**
* Put a key/double pair in the JSONObject.
*
* @param key
* A key string.
* @param value
* A double which is the value.
* @return this.
* @throws JSONException
* If the key is null or if the number is invalid.
*/
public JSONObject put(String key, double value) throws JSONException {
this.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 {
this.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 {
this.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 {
this.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);
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 + "\"");
this.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) this.put(key, value);
return this;
}
/**
* 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 map.remove(key);
}
/**
* 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(opt(names.getString(i)));
return ja;
}
/**
* Make a JSON text of this JSONObject. For compactness, no whitespace is added. If this would not result in a
* syntactically correct JSON text, then null will be returned instead.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @return a printable, displayable, portable, transmittable representation of the object, beginning with
* <code>{</code> <small>(left brace)</small> and ending with <code>}</code> <small>(right
* brace)</small>.
*/
@Override
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(map.get(o)));
}
sb.append('}');
return sb.toString();
} catch (Exception e) {
return null;
}
}
/**
* Make a prettyprinted JSON text of this JSONObject.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @param indentFactor
* The number of spaces to add to each level of indentation.
* @return a printable, displayable, portable, transmittable representation of the object, beginning with
* <code>{</code> <small>(left brace)</small> and ending with <code>}</code> <small>(right
* brace)</small>.
* @throws JSONException
* If the object contains an invalid number.
*/
public String toString(int indentFactor) throws JSONException {
return this.toString(indentFactor, 0);
}
/**
* Make a prettyprinted JSON text of this JSONObject.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @param indentFactor
* The number of spaces to add to each level of indentation.
* @param indent
* The indentation of the top level.
* @return a printable, displayable, transmittable representation of the object, beginning with <code>{</code>
* <small>(left brace)</small> and ending with <code>}</code> <small>(right brace)</small>.
* @throws JSONException
* If the object contains an invalid number.
*/
String toString(int indentFactor, int indent) throws JSONException {
int i;
int length = length();
if (length == 0) return "{}";
Iterator keys = keys();
int newindent = indent + indentFactor;
Object object;
StringBuffer sb = new StringBuffer("{");
if (length == 1) {
object = keys.next();
sb.append(quote(object.toString()));
sb.append(": ");
sb.append(valueToString(map.get(object), indentFactor, indent));
} else {
while (keys.hasNext()) {
object = keys.next();
if (sb.length() > 1) sb.append(",\n");
else
sb.append('\n');
for (i = 0; i < newindent; i += 1)
sb.append(' ');
sb.append(quote(object.toString()));
sb.append(": ");
sb.append(valueToString(map.get(object), indentFactor, newindent));
}
if (sb.length() > 1) {
sb.append('\n');
for (i = 0; i < indent; i += 1)
sb.append(' ');
}
}
sb.append('}');
return sb.toString();
}
/**
* Write the contents of the JSONObject as JSON text to a writer. For compactness, no whitespace is added.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @return The writer.
* @throws JSONException
*/
public Writer write(Writer writer) throws JSONException {
try {
boolean commanate = false;
Iterator keys = keys();
writer.write('{');
while (keys.hasNext()) {
if (commanate) writer.write(',');
Object key = keys.next();
writer.write(quote(key.toString()));
writer.write(':');
Object value = map.get(key);
if (value instanceof JSONObject) ((JSONObject) value).write(writer);
else if (value instanceof JSONArray) ((JSONArray) value).write(writer);
else
writer.write(valueToString(value));
commanate = true;
}
writer.write('}');
return writer;
} catch (IOException exception) {
throw new JSONException(exception);
}
}
}