/* ****************************************************************************** **
** 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. **
** **
** ****************************************************************************** */
package org.rssowl.core.internal.interpreter.json;
import org.eclipse.osgi.util.NLS;
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>
* <li>Numbers may have the <code>0x-</code> <small>(hex)</small> prefix.</li>
* </ul>
*
* @author JSON.org
* @version 2011-04-05
*/
@SuppressWarnings("unchecked")
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"; //$NON-NLS-1$
}
/*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return super.hashCode();
}
}
/**
* The map where the JSONObject's properties are kept.
*/
private Map map;
/**
* It is sometimes more convenient and less ambiguous to have a
* <code>NULL</code> object than to use Java's <code>null</code> value.
* <code>JSONObject.NULL.equals(null)</code> returns <code>true</code>.
* <code>JSONObject.NULL.toString()</code> returns <code>"null"</code>.
*/
public static final Object NULL = new Null();
/**
* Construct an empty JSONObject.
*/
public JSONObject() {
this.map = new HashMap();
}
/**
* Construct a JSONObject from a subset of another JSONObject. An array of
* strings is used to identify the keys that should be copied. Missing keys
* are ignored.
*
* @param jo A JSONObject.
* @param names An array of strings.
*/
public JSONObject(JSONObject jo, String[] names) {
this();
for (int i = 0; i < names.length; i += 1) {
try {
putOnce(names[i], jo.opt(names[i]));
} catch (Exception ignore) {
}
}
}
/**
* Construct a JSONObject from a JSONTokener.
*
* @param x A JSONTokener object containing the source string.
* @throws JSONException If there is a syntax error in the source string or a
* duplicated key.
*/
public JSONObject(JSONTokener x) throws JSONException {
this();
char c;
String key;
if (x.nextClean() != '{') {
throw x.syntaxError("A JSONObject text must begin with '{'"); //$NON-NLS-1$
}
for (;;) {
c = x.nextClean();
switch (c) {
case 0:
throw x.syntaxError("A JSONObject text must end with '}'"); //$NON-NLS-1$
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"); //$NON-NLS-1$
}
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 '}'"); //$NON-NLS-1$
}
}
}
/**
* 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 = 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 (int i = 0; i < names.length; i += 1) {
String name = names[i];
try {
putOpt(name, c.getField(name).get(object));
} catch (Exception ignore) {
}
}
}
/**
* Construct a JSONObject from a source JSON text string. This is the most
* commonly used JSONObject constructor.
*
* @param source A string beginning with <code>{</code> <small>(left
* brace)</small> and ending with <code>}</code> <small>(right
* brace)</small>.
* @exception JSONException If there is a syntax error in the source string or
* a duplicated key.
*/
public JSONObject(String source) throws JSONException {
this(new JSONTokener(source));
}
/**
* 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("\\."); //$NON-NLS-1$
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) {
put(key, value instanceof JSONArray ? new JSONArray().put(value) : value);
} else if (object instanceof JSONArray) {
((JSONArray) object).put(value);
} else {
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) {
put(key, new JSONArray().put(value));
} else if (object instanceof JSONArray) {
put(key, ((JSONArray) object).put(value));
} else {
throw new JSONException(NLS.bind("JSONObject[{0}] is not a JSONArray.", key)); //$NON-NLS-1$
}
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.
*/
public static String doubleToString(double d) {
if (Double.isInfinite(d) || Double.isNaN(d)) {
return "null"; //$NON-NLS-1$
}
// 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")) { //$NON-NLS-1$
string = string.substring(0, string.length() - 1);
}
if (string.endsWith(".")) { //$NON-NLS-1$
string = string.substring(0, string.length() - 1);
}
}
return string;
}
/**
* 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."); //$NON-NLS-1$
}
Object object = opt(key);
if (object == null) {
throw new JSONException(NLS.bind("JSONObject[{0}] not found.", quote(key))); //$NON-NLS-1$
}
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"))) { //$NON-NLS-1$
return false;
} else if (object.equals(Boolean.TRUE) || (object instanceof String && ((String) object).equalsIgnoreCase("true"))) { //$NON-NLS-1$
return true;
}
throw new JSONException(NLS.bind("JSONObject[{0}] is not a Boolean.", quote(key))); //$NON-NLS-1$
}
/**
* 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(NLS.bind("JSONObject[{0}] is not a number.", quote(key))); //$NON-NLS-1$
}
}
/**
* 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(NLS.bind("JSONObject[{0}] is not an int.", quote(key))); //$NON-NLS-1$
}
}
/**
* 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(NLS.bind("JSONObject[{0}] is not a JSONArray.", quote(key))); //$NON-NLS-1$
}
/**
* 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(NLS.bind("JSONObject[{0}] is not a JSONObject.", quote(key))); //$NON-NLS-1$
}
/**
* 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(NLS.bind("JSONObject[{0}] is not a long.", quote(key))); //$NON-NLS-1$
}
}
/**
* Get an array of field names from a JSONObject.
*
* @param jo
* @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.
*
* @param 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 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(NLS.bind("JSONObject[{0}] not a string.", quote(key))); //$NON-NLS-1$
}
/**
* Determine if the JSONObject contains a specific key.
*
* @param key A key string.
* @return true if the key exists in the JSONObject.
*/
public boolean has(String key) {
return this.map.containsKey(key);
}
/**
* Increment a property of a JSONObject. If there is no such property, create
* one with a value of 1. If there is such a property, and if it is an
* Integer, Long, Double, or Float, then add one to it.
*
* @param key A key string.
* @return this.
* @throws JSONException If there is already a property with this name that is
* not an Integer, Long, Double, or Float.
*/
public JSONObject increment(String key) throws JSONException {
Object value = opt(key);
if (value == null) {
put(key, 1);
} else if (value instanceof Integer) {
put(key, ((Integer) value).intValue() + 1);
} else if (value instanceof Long) {
put(key, ((Long) value).longValue() + 1);
} else if (value instanceof Double) {
put(key, ((Double) value).doubleValue() + 1);
} else if (value instanceof Float) {
put(key, ((Float) value).floatValue() + 1);
} else {
throw new JSONException(NLS.bind("Unable to increment [{0}].", quote(key))); //$NON-NLS-1$
}
return this;
}
/**
* Determine if the value associated with the key is null or if there is no
* value.
*
* @param key A key string.
* @return true if there is no value associated with the key or if the value
* is the JSONObject.NULL object.
*/
public boolean isNull(String key) {
return JSONObject.NULL.equals(opt(key));
}
/**
* Get an enumeration of the keys of the JSONObject.
*
* @return An iterator of the keys.
*/
public Iterator keys() {
return this.map.keySet().iterator();
}
/**
* Get the number of keys stored in the JSONObject.
*
* @return The number of keys in the JSONObject.
*/
public int length() {
return this.map.size();
}
/**
* Produce a JSONArray containing the names of the elements of this
* JSONObject.
*
* @return A JSONArray containing the key strings, or null if the JSONObject
* is empty.
*/
public JSONArray names() {
JSONArray ja = new JSONArray();
Iterator keys = this.keys();
while (keys.hasNext()) {
ja.put(keys.next());
}
return ja.length() == 0 ? null : ja;
}
/**
* 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"); //$NON-NLS-1$
}
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")) { //$NON-NLS-1$
string = string.substring(0, string.length() - 1);
}
if (string.endsWith(".")) { //$NON-NLS-1$
string = string.substring(0, string.length() - 1);
}
}
return string;
}
/**
* Get an optional value associated with a key.
*
* @param key A key string.
* @return An object which is the value, or null if there is no value.
*/
public Object opt(String key) {
return key == null ? null : this.map.get(key);
}
/**
* Get an optional boolean associated with a key. It returns false if there is
* no such key, or if the value is not Boolean.TRUE or the String "true".
*
* @param key A key string.
* @return The truth.
*/
public boolean optBoolean(String key) {
return optBoolean(key, false);
}
/**
* Get an optional boolean associated with a key. It returns the defaultValue
* if there is no such key, or if it is not a Boolean or the String "true" or
* "false" (case insensitive).
*
* @param key A key string.
* @param defaultValue The default.
* @return The truth.
*/
public boolean optBoolean(String key, boolean defaultValue) {
try {
return getBoolean(key);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Get an optional double associated with a key, or NaN if there is no such
* key or if its value is not a number. If the value is a string, an attempt
* will be made to evaluate it as a number.
*
* @param key A string which is the key.
* @return An object which is the value.
*/
public double optDouble(String key) {
return optDouble(key, Double.NaN);
}
/**
* Get an optional double associated with a key, or the defaultValue if there
* is no such key or if its value is not a number. If the value is a string,
* an attempt will be made to evaluate it as a number.
*
* @param key A key string.
* @param defaultValue The default.
* @return An object which is the value.
*/
public double optDouble(String key, double defaultValue) {
try {
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 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 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 optString(key, ""); //$NON-NLS-1$
}
/**
* 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 (int i = 0; i < methods.length; i += 1) {
try {
Method method = methods[i];
if (Modifier.isPublic(method.getModifiers())) {
String name = method.getName();
String key = ""; //$NON-NLS-1$
if (name.startsWith("get")) { //$NON-NLS-1$
if (name.equals("getClass") || name.equals("getDeclaringClass")) { //$NON-NLS-1$ //$NON-NLS-2$
key = ""; //$NON-NLS-1$
} else {
key = name.substring(3);
}
} else if (name.startsWith("is")) { //$NON-NLS-1$
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) {
}
}
}
/**
* Put a key/boolean pair in the JSONObject.
*
* @param key A key string.
* @param value A boolean which is the value.
* @return this.
* @throws JSONException If the key is null.
*/
public JSONObject put(String key, boolean value) throws JSONException {
put(key, value ? Boolean.TRUE : Boolean.FALSE);
return this;
}
/**
* Put a key/value pair in the JSONObject, where the value will be a JSONArray
* which is produced from a Collection.
*
* @param key A key string.
* @param value A Collection value.
* @return this.
* @throws JSONException
*/
public JSONObject put(String key, Collection value) throws JSONException {
put(key, new JSONArray(value));
return this;
}
/**
* Put a key/double pair in the JSONObject.
*
* @param key A key string.
* @param value A double which is the value.
* @return this.
* @throws JSONException If the key is null or if the number is invalid.
*/
public JSONObject put(String key, double value) throws JSONException {
put(key, new Double(value));
return this;
}
/**
* Put a key/int pair in the JSONObject.
*
* @param key A key string.
* @param value An int which is the value.
* @return this.
* @throws JSONException If the key is null.
*/
public JSONObject put(String key, int value) throws JSONException {
put(key, Integer.valueOf(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, Long.valueOf(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."); //$NON-NLS-1$
}
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(NLS.bind("Duplicate key \"{0}\"", key)); //$NON-NLS-1$
}
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 </, 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 "\"\""; //$NON-NLS-1$
}
char b;
char c = 0;
String hhhh;
int i;
int len = string.length();
StringBuilder sb = new StringBuilder(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"); //$NON-NLS-1$
break;
case '\t':
sb.append("\\t"); //$NON-NLS-1$
break;
case '\n':
sb.append("\\n"); //$NON-NLS-1$
break;
case '\f':
sb.append("\\f"); //$NON-NLS-1$
break;
case '\r':
sb.append("\\r"); //$NON-NLS-1$
break;
default:
if (c < ' ' || (c >= '\u0080' && c < '\u00a0') || (c >= '\u2000' && c < '\u2100')) {
hhhh = "000" + Integer.toHexString(c); //$NON-NLS-1$
sb.append("\\u" + hhhh.substring(hhhh.length() - 4)); //$NON-NLS-1$
} else {
sb.append(c);
}
}
}
sb.append('"');
return sb.toString();
}
/**
* Remove a name and its value, if present.
*
* @param key The name to be removed.
* @return The value that was associated with the name, or null if there was
* no value.
*/
public Object remove(String key) {
return this.map.remove(key);
}
/**
* 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) {
if (string.equals("")) { //$NON-NLS-1$
return string;
}
if (string.equalsIgnoreCase("true")) { //$NON-NLS-1$
return Boolean.TRUE;
}
if (string.equalsIgnoreCase("false")) { //$NON-NLS-1$
return Boolean.FALSE;
}
if (string.equalsIgnoreCase("null")) { //$NON-NLS-1$
return JSONObject.NULL;
}
/*
* If it might be a number, try converting it. We support the non-standard
* 0x- convention. If a number cannot be produced, then the value will just
* be a string. Note that the 0x-, plus, and implied string conventions are
* non-standard. A JSON parser may accept non-JSON forms as long as it
* accepts all correct JSON forms.
*/
char b = string.charAt(0);
if ((b >= '0' && b <= '9') || b == '.' || b == '-' || b == '+') {
if (b == '0' && string.length() > 2 && (string.charAt(1) == 'x' || string.charAt(1) == 'X')) {
try {
return Integer.valueOf(Integer.parseInt(string.substring(2), 16));
} catch (Exception ignore) {
}
}
try {
if (string.indexOf('.') > -1 || string.indexOf('e') > -1 || string.indexOf('E') > -1)
return Double.valueOf(string);
Long myLong = new Long(string);
if (myLong.longValue() == myLong.intValue())
return Integer.valueOf(myLong.intValue());
return myLong;
} catch (Exception ignore) {
}
}
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."); //$NON-NLS-1$
}
} else if (o instanceof Float) {
if (((Float) o).isInfinite() || ((Float) o).isNaN()) {
throw new JSONException("JSON does not allow non-finite numbers."); //$NON-NLS-1$
}
}
}
}
/**
* Produce a JSONArray containing the values of the members of this
* JSONObject.
*
* @param names A JSONArray containing a list of key strings. This determines
* the sequence of the values in the result.
* @return A JSONArray of values.
* @throws JSONException If any of the values are non-finite numbers.
*/
public JSONArray toJSONArray(JSONArray names) throws JSONException {
if (names == null || names.length() == 0) {
return null;
}
JSONArray ja = new JSONArray();
for (int i = 0; i < names.length(); i += 1) {
ja.put(this.opt(names.getString(i)));
}
return ja;
}
/**
* Make a JSON text of this JSONObject. For compactness, no whitespace is
* added. If this would not result in a syntactically correct JSON text, then
* null will be returned instead.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @return a printable, displayable, portable, transmittable representation of
* the object, beginning with <code>{</code> <small>(left brace)</small>
* and ending with <code>}</code> <small>(right brace)</small>.
*/
@Override
public String toString() {
try {
Iterator keys = this.keys();
StringBuilder sb = new StringBuilder("{"); //$NON-NLS-1$
while (keys.hasNext()) {
if (sb.length() > 1) {
sb.append(',');
}
Object o = keys.next();
sb.append(quote(o.toString()));
sb.append(':');
sb.append(valueToString(this.map.get(o)));
}
sb.append('}');
return sb.toString();
} catch (Exception e) {
return null;
}
}
/**
* Make a prettyprinted JSON text of this JSONObject.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @param indentFactor The number of spaces to add to each level of
* indentation.
* @return a printable, displayable, portable, transmittable representation of
* the object, beginning with <code>{</code> <small>(left brace)</small>
* and ending with <code>}</code> <small>(right brace)</small>.
* @throws JSONException If the object contains an invalid number.
*/
public String toString(int indentFactor) throws JSONException {
return toString(indentFactor, 0);
}
/**
* Make a prettyprinted JSON text of this JSONObject.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @param indentFactor The number of spaces to add to each level of
* indentation.
* @param indent The indentation of the top level.
* @return a printable, displayable, transmittable representation of the
* object, beginning with <code>{</code> <small>(left brace)</small> and
* ending with <code>}</code> <small>(right brace)</small>.
* @throws JSONException If the object contains an invalid number.
*/
String toString(int indentFactor, int indent) throws JSONException {
int i;
int length = this.length();
if (length == 0) {
return "{}"; //$NON-NLS-1$
}
Iterator keys = this.keys();
int newindent = indent + indentFactor;
Object object;
StringBuilder sb = new StringBuilder("{"); //$NON-NLS-1$
if (length == 1) {
object = keys.next();
sb.append(quote(object.toString()));
sb.append(": "); //$NON-NLS-1$
sb.append(valueToString(this.map.get(object), indentFactor, indent));
} else {
while (keys.hasNext()) {
object = keys.next();
if (sb.length() > 1) {
sb.append(",\n"); //$NON-NLS-1$
} else {
sb.append('\n');
}
for (i = 0; i < newindent; i += 1) {
sb.append(' ');
}
sb.append(quote(object.toString()));
sb.append(": "); //$NON-NLS-1$
sb.append(valueToString(this.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();
}
/**
* 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"; //$NON-NLS-1$
}
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(NLS.bind("Bad value from toJSONString: {0}", object)); //$NON-NLS-1$
}
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"; //$NON-NLS-1$
}
try {
if (value instanceof JSONString) {
Object o = ((JSONString) value).toJSONString();
if (o instanceof String) {
return (String) o;
}
}
} catch (Exception ignore) {
}
if (value instanceof Number) {
return numberToString((Number) value);
}
if (value instanceof Boolean) {
return value.toString();
}
if (value instanceof JSONObject) {
return ((JSONObject) value).toString(indentFactor, indent);
}
if (value instanceof JSONArray) {
return ((JSONArray) value).toString(indentFactor, indent);
}
if (value instanceof Map) {
return new JSONObject((Map) value).toString(indentFactor, indent);
}
if (value instanceof Collection) {
return new JSONArray((Collection) value).toString(indentFactor, indent);
}
if (value.getClass().isArray()) {
return new JSONArray(value).toString(indentFactor, indent);
}
return quote(value.toString());
}
/**
* Wrap an object, if necessary. If the object is null, return the NULL
* object. If it is an array or collection, wrap it in a JSONArray. If it is a
* map, wrap it in a JSONObject. If it is a standard property (Double, String,
* et al) then it is already wrapped. Otherwise, if it comes from one of the
* java packages, turn it into a string. And if it doesn't, try to wrap it in
* a JSONObject. If the wrapping fails, then null is returned.
*
* @param object The object to wrap
* @return The wrapped value
*/
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() : ""; //$NON-NLS-1$
if (objectPackageName.startsWith("java.") || objectPackageName.startsWith("javax.") || object.getClass().getClassLoader() == null) { //$NON-NLS-1$ //$NON-NLS-2$
return object.toString();
}
return new JSONObject(object);
} catch (Exception exception) {
return null;
}
}
/**
* Write the contents of the JSONObject as JSON text to a writer. For
* compactness, no whitespace is added.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @param writer
* @return The writer.
* @throws JSONException
*/
public Writer write(Writer writer) throws JSONException {
try {
boolean commanate = false;
Iterator keys = this.keys();
writer.write('{');
while (keys.hasNext()) {
if (commanate) {
writer.write(',');
}
Object key = keys.next();
writer.write(quote(key.toString()));
writer.write(':');
Object value = this.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);
}
}
}