mirror of
https://github.com/IntellectualSites/PlotSquared.git
synced 2024-11-24 06:06:45 +01:00
1487 lines
53 KiB
Java
1487 lines
53 KiB
Java
package com.intellectualcrafters.json;
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import java.io.IOException;
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import java.io.StringWriter;
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import java.io.Writer;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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import java.util.*;
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import java.util.Map.Entry;
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/**
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* A JSONObject is an unordered collection of name/value pairs. Its external form is a string wrapped in curly braces
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* with colons between the names and values, and commas between the values and names. The internal form is an object
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* having <code>get</code> and <code>opt</code> methods for accessing the values by name, and <code>put</code> methods
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* for adding or replacing values by name. The values can be any of these types: <code>Boolean</code>,
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* <code>JSONArray</code>, <code>JSONObject</code>, <code>Number</code>, <code>String</code>, or the
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* <code>JSONObject.NULL</code> object. A JSONObject constructor can be used to convert an external form JSON text into
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* an internal form whose values can be retrieved with the <code>get</code> and <code>opt</code> methods, or to convert
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* values into a JSON text using the <code>put</code> and <code>toString</code> methods. A <code>get</code> method
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* returns a value if one can be found, and throws an exception if one cannot be found. An <code>opt</code> method
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* returns a default value instead of throwing an exception, and so is useful for obtaining optional values.
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*
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* The generic <code>get()</code> and <code>opt()</code> methods return an object, which you can cast or query for type.
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* There are also typed <code>get</code> and <code>opt</code> methods that do type checking and type coercion for you.
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* The opt methods differ from the get methods in that they do not throw. Instead, they return a specified value, such
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* as null.
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*
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* The <code>put</code> methods add or replace values in an object. For example,
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*
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*
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* <pre>
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* myString = new JSONObject().put("JSON", "Hello, World!").toString();
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* </pre>
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*
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* produces the string <code>{"JSON": "Hello, World"}</code>.
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*
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* The texts produced by the <code>toString</code> methods strictly conform to the JSON syntax rules. The constructors
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* are more forgiving in the texts they will accept: <ul> <li>An extra <code>,</code> <small>(comma)</small> may
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* appear just before the closing brace.</li> <li>Strings may be quoted with <code>'</code> <small>(single
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* quote)</small>.</li> <li>Strings do not need to be quoted at all if they do not begin with a quote or single quote,
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* and if they do not contain leading or trailing spaces, and if they do not contain any of these characters: <code>{ }
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* [ ] / \ : , #</code> and if they do not look like numbers and if they are not the reserved words <code>true</code>,
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* <code>false</code>, or <code>null</code>.</li> </ul>
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*
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* @author JSON.org
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* @version 2014-05-03
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*/
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public class JSONObject {
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/**
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* It is sometimes more convenient and less ambiguous to have a <code>NULL</code> object than to use Java's
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* <code>null</code> value. <code>JSONObject.NULL.equals(null)</code> returns <code>true</code>.
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* <code>JSONObject.NULL.toString()</code> returns <code>"null"</code>.
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*/
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public static final Object NULL = new Null();
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/**
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* The map where the JSONObject's properties are kept.
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*/
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private final Map<String, Object> map;
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/**
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* Construct an empty JSONObject.
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*/
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public JSONObject() {
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this.map = new HashMap<String, Object>();
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}
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/**
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* Construct a JSONObject from a subset of another JSONObject. An array of strings is used to identify the keys that
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* should be copied. Missing keys are ignored.
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*
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* @param jo A JSONObject.
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* @param names An array of strings.
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*
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* @throws JSONException
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* @throws JSONException If a value is a non-finite number or if a name is duplicated.
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*/
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public JSONObject(final JSONObject jo, final String[] names) {
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this();
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for (final String name : names) {
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try {
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this.putOnce(name, jo.opt(name));
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} catch (final Exception ignore) {
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}
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}
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}
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/**
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* Construct a JSONObject from a JSONTokener.
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*
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* @param x A JSONTokener object containing the source string.
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*
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* @throws JSONException If there is a syntax error in the source string or a duplicated key.
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*/
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public JSONObject(final JSONTokener x) throws JSONException {
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this();
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char c;
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String key;
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if (x.nextClean() != '{') {
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throw x.syntaxError("A JSONObject text must begin with '{'");
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}
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for (;;) {
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c = x.nextClean();
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switch (c) {
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case 0:
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throw x.syntaxError("A JSONObject text must end with '}'");
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case '}':
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return;
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default:
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x.back();
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key = x.nextValue().toString();
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}
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// The key is followed by ':'.
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c = x.nextClean();
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if (c != ':') {
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throw x.syntaxError("Expected a ':' after a key");
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}
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this.putOnce(key, x.nextValue());
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// Pairs are separated by ','.
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switch (x.nextClean()) {
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case ';':
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case ',':
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if (x.nextClean() == '}') {
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return;
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}
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x.back();
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break;
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case '}':
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return;
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default:
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throw x.syntaxError("Expected a ',' or '}'");
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}
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}
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}
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/**
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* Construct a JSONObject from a Map.
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*
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* @param map A map object that can be used to initialize the contents of the JSONObject.
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*
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* @throws JSONException
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*/
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public JSONObject(final Map<String, Object> map) {
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this.map = new HashMap<String, Object>();
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if (map != null) {
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for (final Entry<String, Object> entry : map.entrySet()) {
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final Object value = entry.getValue();
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if (value != null) {
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this.map.put(entry.getKey(), wrap(value));
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}
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}
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}
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}
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/**
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* Construct a JSONObject from an Object using bean getters. It reflects on all of the public methods of the object.
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* For each of the methods with no parameters and a name starting with <code>"get"</code> or <code>"is"</code>
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* followed by an uppercase letter, the method is invoked, and a key and the value returned from the getter method
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* are put into the new JSONObject.
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*
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* The key is formed by removing the <code>"get"</code> or <code>"is"</code> prefix. If the second remaining
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* character is not upper case, then the first character is converted to lower case.
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*
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* For example, if an object has a method named <code>"getName"</code>, and if the result of calling
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* <code>object.getName()</code> is <code>"Larry Fine"</code>, then the JSONObject will contain <code>"name": "Larry
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* Fine"</code>.
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*
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* @param bean An object that has getter methods that should be used to make a JSONObject.
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*/
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public JSONObject(final Object bean) {
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this();
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this.populateMap(bean);
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}
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/**
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* Construct a JSONObject from an Object, using reflection to find the public members. The resulting JSONObject's
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* keys will be the strings from the names array, and the values will be the field values associated with those keys
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* in the object. If a key is not found or not visible, then it will not be copied into the new JSONObject.
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*
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* @param object An object that has fields that should be used to make a JSONObject.
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* @param names An array of strings, the names of the fields to be obtained from the object.
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*/
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public JSONObject(final Object object, final String names[]) {
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this();
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final Class c = object.getClass();
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for (final String name : names) {
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try {
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this.putOpt(name, c.getField(name).get(object));
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} catch (final Exception ignore) {
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}
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}
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}
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/**
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* Construct a JSONObject from a source JSON text string. This is the most commonly used JSONObject constructor.
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*
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* @param source A string beginning with <code>{</code> <small>(left brace)</small> and ending with
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* <code>}</code> <small>(right brace)</small>.
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*
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* @throws JSONException If there is a syntax error in the source string or a duplicated key.
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*/
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public JSONObject(final String source) throws JSONException {
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this(new JSONTokener(source));
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}
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/**
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* Construct a JSONObject from a ResourceBundle.
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*
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* @param baseName The ResourceBundle base name.
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* @param locale The Locale to load the ResourceBundle for.
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*
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* @throws JSONException If any JSONExceptions are detected.
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*/
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public JSONObject(final String baseName, final Locale locale) throws JSONException {
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this();
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final ResourceBundle bundle = ResourceBundle.getBundle(baseName, locale, Thread.currentThread().getContextClassLoader());
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// Iterate through the keys in the bundle.
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final Enumeration<String> keys = bundle.getKeys();
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while (keys.hasMoreElements()) {
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final Object key = keys.nextElement();
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if (key != null) {
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// Go through the path, ensuring that there is a nested
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// JSONObject for each
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// segment except the last. Add the value using the last
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// segment's name into
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// the deepest nested JSONObject.
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final String[] path = ((String) key).split("\\.");
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final int last = path.length - 1;
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JSONObject target = this;
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for (int i = 0; i < last; i += 1) {
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final String segment = path[i];
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JSONObject nextTarget = target.optJSONObject(segment);
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if (nextTarget == null) {
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nextTarget = new JSONObject();
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target.put(segment, nextTarget);
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}
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target = nextTarget;
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}
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target.put(path[last], bundle.getString((String) key));
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}
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}
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}
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/**
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* Produce a string from a double. The string "null" will be returned if the number is not finite.
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*
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* @param d A double.
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*
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* @return A String.
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*/
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public static String doubleToString(final double d) {
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if (Double.isInfinite(d) || Double.isNaN(d)) {
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return "null";
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}
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// Shave off trailing zeros and decimal point, if possible.
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String string = Double.toString(d);
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if ((string.indexOf('.') > 0) && (string.indexOf('e') < 0) && (string.indexOf('E') < 0)) {
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while (string.endsWith("0")) {
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string = string.substring(0, string.length() - 1);
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}
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if (string.endsWith(".")) {
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string = string.substring(0, string.length() - 1);
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}
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}
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return string;
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}
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/**
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* Get an array of field names from a JSONObject.
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*
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* @return An array of field names, or null if there are no names.
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*/
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public static String[] getNames(final JSONObject jo) {
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final int length = jo.length();
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if (length == 0) {
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return null;
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}
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final Iterator<String> iterator = jo.keys();
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final String[] names = new String[length];
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int i = 0;
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while (iterator.hasNext()) {
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names[i] = iterator.next();
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i += 1;
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}
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return names;
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}
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/**
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* Get an array of field names from an Object.
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*
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* @return An array of field names, or null if there are no names.
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*/
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public static String[] getNames(final Object object) {
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if (object == null) {
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return null;
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}
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final Class klass = object.getClass();
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final Field[] fields = klass.getFields();
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final int length = fields.length;
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if (length == 0) {
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return null;
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}
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final String[] names = new String[length];
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for (int i = 0; i < length; i += 1) {
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names[i] = fields[i].getName();
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}
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return names;
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}
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/**
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* Produce a string from a Number.
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*
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* @param number A Number
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*
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* @return A String.
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*
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* @throws JSONException If n is a non-finite number.
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*/
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public static String numberToString(final Number number) throws JSONException {
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if (number == null) {
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throw new JSONException("Null pointer");
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}
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testValidity(number);
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// Shave off trailing zeros and decimal point, if possible.
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String string = number.toString();
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if ((string.indexOf('.') > 0) && (string.indexOf('e') < 0) && (string.indexOf('E') < 0)) {
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while (string.endsWith("0")) {
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string = string.substring(0, string.length() - 1);
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}
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if (string.endsWith(".")) {
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string = string.substring(0, string.length() - 1);
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}
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}
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return string;
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}
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/**
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* Produce a string in double quotes with backslash sequences in all the right places. A backslash will be inserted
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* control character or an unescaped quote or backslash.
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*
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* @param string A String
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*
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* @return A String correctly formatted for insertion in a JSON text.
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*/
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public static String quote(final String string) {
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final StringWriter sw = new StringWriter();
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synchronized (sw.getBuffer()) {
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try {
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return quote(string, sw).toString();
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} catch (final IOException ignored) {
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// will never happen - we are writing to a string writer
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return "";
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}
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}
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}
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public static Writer quote(final String string, final Writer w) throws IOException {
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if ((string == null) || (string.length() == 0)) {
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w.write("\"\"");
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return w;
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}
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char b;
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char c = 0;
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String hhhh;
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int i;
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final int len = string.length();
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w.write('"');
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for (i = 0; i < len; i += 1) {
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b = c;
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c = string.charAt(i);
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switch (c) {
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case '\\':
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case '"':
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w.write('\\');
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w.write(c);
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break;
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case '/':
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if (b == '<') {
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w.write('\\');
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}
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w.write(c);
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break;
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case '\b':
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w.write("\\b");
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break;
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case '\t':
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w.write("\\t");
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break;
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case '\n':
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w.write("\\n");
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break;
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case '\f':
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w.write("\\f");
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break;
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case '\r':
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w.write("\\r");
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break;
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default:
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if ((c < ' ') || ((c >= '\u0080') && (c < '\u00a0')) || ((c >= '\u2000') && (c < '\u2100'))) {
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w.write("\\u");
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hhhh = Integer.toHexString(c);
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w.write("0000", 0, 4 - hhhh.length());
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w.write(hhhh);
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} else {
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w.write(c);
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}
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}
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}
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w.write('"');
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return w;
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}
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/**
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* Try to convert a string into a number, boolean, or null. If the string can't be converted, return the string.
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*
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* @param string A String.
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*
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* @return A simple JSON value.
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*/
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public static Object stringToValue(final String string) {
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Double d;
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if (string.equals("")) {
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return string;
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}
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if (string.equalsIgnoreCase("true")) {
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return Boolean.TRUE;
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}
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if (string.equalsIgnoreCase("false")) {
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return Boolean.FALSE;
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}
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if (string.equalsIgnoreCase("null")) {
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return JSONObject.NULL;
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}
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/*
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* If it might be a number, try converting it. If a number cannot be
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* produced, then the value will just be a string.
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*/
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final char b = string.charAt(0);
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if (((b >= '0') && (b <= '9')) || (b == '-')) {
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try {
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if ((string.indexOf('.') > -1) || (string.indexOf('e') > -1) || (string.indexOf('E') > -1)) {
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d = Double.valueOf(string);
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if (!d.isInfinite() && !d.isNaN()) {
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return d;
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}
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} else {
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final Long myLong = new Long(string);
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if (string.equals(myLong.toString())) {
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if (myLong == myLong.intValue()) {
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return myLong.intValue();
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} else {
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return myLong;
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}
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}
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}
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} catch (final Exception ignore) {
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}
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}
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return string;
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}
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/**
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* Throw an exception if the object is a NaN or infinite number.
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*
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* @param o The object to test.
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*
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* @throws JSONException If o is a non-finite number.
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*/
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public static void testValidity(final Object o) throws JSONException {
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if (o != null) {
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if (o instanceof Double) {
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if (((Double) o).isInfinite() || ((Double) o).isNaN()) {
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throw new JSONException("JSON does not allow non-finite numbers.");
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}
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} else if (o instanceof Float) {
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if (((Float) o).isInfinite() || ((Float) o).isNaN()) {
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throw new JSONException("JSON does not allow non-finite numbers.");
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}
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}
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}
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}
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/**
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* Make a JSON text of an Object value. If the object has an value.toJSONString() method, then that method will be
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* used to produce the JSON text. The method is required to produce a strictly conforming text. If the object does
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* not contain a toJSONString method (which is the most common case), then a text will be produced by other means.
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* If the value is an array or Collection, then a JSONArray will be made from it and its toJSONString method will be
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* called. If the value is a MAP, then a JSONObject will be made from it and its toJSONString method will be called.
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* Otherwise, the value's toString method will be called, and the result will be quoted.
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*
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*
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* Warning: This method assumes that the data structure is acyclical.
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*
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* @param value The value to be serialized.
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*
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* @return a printable, displayable, transmittable representation of the object, beginning with
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* <code>{</code> <small>(left brace)</small> and ending with <code>}</code> <small>(right
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* brace)</small>.
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*
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* @throws JSONException If the value is or contains an invalid number.
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*/
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public static String valueToString(final Object value) throws JSONException {
|
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if ((value == null) || value.equals(null)) {
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return "null";
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}
|
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if (value instanceof JSONString) {
|
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Object object;
|
|
try {
|
|
object = ((JSONString) value).toJSONString();
|
|
} catch (final 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<String, Object>) value).toString();
|
|
}
|
|
if (value instanceof Collection) {
|
|
return new JSONArray((Collection<Object>) value).toString();
|
|
}
|
|
if (value.getClass().isArray()) {
|
|
return new JSONArray(value).toString();
|
|
}
|
|
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(final 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>) object);
|
|
}
|
|
if (object.getClass().isArray()) {
|
|
return new JSONArray(object);
|
|
}
|
|
if (object instanceof Map) {
|
|
return new JSONObject((Map<String, Object>) object);
|
|
}
|
|
final Package objectPackage = object.getClass().getPackage();
|
|
final 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 (final Exception exception) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
static final Writer writeValue(final Writer writer, final Object value, final int indentFactor, final int indent) throws JSONException, IOException {
|
|
if ((value == null) || value.equals(null)) {
|
|
writer.write("null");
|
|
} else if (value instanceof JSONObject) {
|
|
((JSONObject) value).write(writer, indentFactor, indent);
|
|
} else if (value instanceof JSONArray) {
|
|
((JSONArray) value).write(writer, indentFactor, indent);
|
|
} else if (value instanceof Map) {
|
|
new JSONObject((Map<String, Object>) value).write(writer, indentFactor, indent);
|
|
} else if (value instanceof Collection) {
|
|
new JSONArray((Collection<Object>) value).write(writer, indentFactor, indent);
|
|
} else if (value.getClass().isArray()) {
|
|
new JSONArray(value).write(writer, indentFactor, indent);
|
|
} else if (value instanceof Number) {
|
|
writer.write(numberToString((Number) value));
|
|
} else if (value instanceof Boolean) {
|
|
writer.write(value.toString());
|
|
} else if (value instanceof JSONString) {
|
|
Object o;
|
|
try {
|
|
o = ((JSONString) value).toJSONString();
|
|
} catch (final Exception e) {
|
|
throw new JSONException(e);
|
|
}
|
|
writer.write(o != null ? o.toString() : quote(value.toString()));
|
|
} else {
|
|
quote(value.toString(), writer);
|
|
}
|
|
return writer;
|
|
}
|
|
|
|
static final void indent(final Writer writer, final int indent) throws IOException {
|
|
for (int i = 0; i < indent; i += 1) {
|
|
writer.write(' ');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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(final String key, final Object value) throws JSONException {
|
|
testValidity(value);
|
|
final Object object = this.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(final String key, final Object value) throws JSONException {
|
|
testValidity(value);
|
|
final Object object = this.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(final String key) throws JSONException {
|
|
if (key == null) {
|
|
throw new JSONException("Null key.");
|
|
}
|
|
final Object object = this.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(final String key) throws JSONException {
|
|
final Object object = this.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(final String key) throws JSONException {
|
|
final Object object = this.get(key);
|
|
try {
|
|
return object instanceof Number ? ((Number) object).doubleValue() : Double.parseDouble((String) object);
|
|
} catch (final 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(final String key) throws JSONException {
|
|
final Object object = this.get(key);
|
|
try {
|
|
return object instanceof Number ? ((Number) object).intValue() : Integer.parseInt((String) object);
|
|
} catch (final 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(final String key) throws JSONException {
|
|
final Object object = this.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(final String key) throws JSONException {
|
|
final Object object = this.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(final String key) throws JSONException {
|
|
final Object object = this.get(key);
|
|
try {
|
|
return object instanceof Number ? ((Number) object).longValue() : Long.parseLong((String) object);
|
|
} catch (final 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(final String key) throws JSONException {
|
|
final Object object = this.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(final 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(final String key) throws JSONException {
|
|
final Object value = this.opt(key);
|
|
if (value == null) {
|
|
this.put(key, 1);
|
|
} else if (value instanceof Integer) {
|
|
this.put(key, (Integer) value + 1);
|
|
} else if (value instanceof Long) {
|
|
this.put(key, (Long) value + 1);
|
|
} else if (value instanceof Double) {
|
|
this.put(key, (Double) value + 1);
|
|
} else if (value instanceof Float) {
|
|
this.put(key, (Float) value + 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(final String key) {
|
|
return JSONObject.NULL.equals(this.opt(key));
|
|
}
|
|
|
|
/**
|
|
* Get an enumeration of the keys of the JSONObject.
|
|
*
|
|
* @return An iterator of the keys.
|
|
*/
|
|
public Iterator<String> keys() {
|
|
return this.keySet().iterator();
|
|
}
|
|
|
|
/**
|
|
* Get a set of keys of the JSONObject.
|
|
*
|
|
* @return A keySet.
|
|
*/
|
|
public Set<String> keySet() {
|
|
return this.map.keySet();
|
|
}
|
|
|
|
/**
|
|
* 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() {
|
|
final JSONArray ja = new JSONArray();
|
|
final Iterator<String> keys = this.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(final 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(final 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(final String key, final boolean defaultValue) {
|
|
try {
|
|
return this.getBoolean(key);
|
|
} catch (final 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(final 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(final String key, final double defaultValue) {
|
|
try {
|
|
return this.getDouble(key);
|
|
} catch (final 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(final 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(final String key, final int defaultValue) {
|
|
try {
|
|
return this.getInt(key);
|
|
} catch (final 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(final String key) {
|
|
final Object o = this.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(final String key) {
|
|
final Object object = this.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(final 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(final String key, final long defaultValue) {
|
|
try {
|
|
return this.getLong(key);
|
|
} catch (final 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(final 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(final String key, final String defaultValue) {
|
|
final Object object = this.opt(key);
|
|
return NULL.equals(object) ? defaultValue : object.toString();
|
|
}
|
|
|
|
private void populateMap(final Object bean) {
|
|
final Class klass = bean.getClass();
|
|
// If klass is a System class then set includeSuperClass to false.
|
|
final boolean includeSuperClass = klass.getClassLoader() != null;
|
|
final Method[] methods = includeSuperClass ? klass.getMethods() : klass.getDeclaredMethods();
|
|
for (final Method method : methods) {
|
|
try {
|
|
if (Modifier.isPublic(method.getModifiers())) {
|
|
final 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);
|
|
}
|
|
final Object result = method.invoke(bean, (Object[]) null);
|
|
if (result != null) {
|
|
this.map.put(key, wrap(result));
|
|
}
|
|
}
|
|
}
|
|
} catch (final 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(final String key, final 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(final String key, final Collection<Object> 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(final String key, final 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(final String key, final 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(final String key, final 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(final String key, final Map<String, Object> 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(final String key, final Object value) throws JSONException {
|
|
if (key == null) {
|
|
throw new NullPointerException("Null key.");
|
|
}
|
|
if (value != null) {
|
|
testValidity(value);
|
|
this.map.put(key, value);
|
|
} else {
|
|
this.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 string
|
|
* @param value object
|
|
*
|
|
* @return this.
|
|
*
|
|
* @throws JSONException if the key is a duplicate
|
|
*/
|
|
public JSONObject putOnce(final String key, final Object value) throws JSONException {
|
|
if ((key != null) && (value != null)) {
|
|
if (this.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(final String key, final 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(final String key) {
|
|
return this.map.remove(key);
|
|
}
|
|
|
|
/**
|
|
* Determine if two JSONObjects are similar. They must contain the same set of names which must be associated with
|
|
* similar values.
|
|
*
|
|
* @param other The other JSONObject
|
|
*
|
|
* @return true if they are equal
|
|
*/
|
|
public boolean similar(final Object other) {
|
|
try {
|
|
if (!(other instanceof JSONObject)) {
|
|
return false;
|
|
}
|
|
final Set<String> set = this.keySet();
|
|
if (!set.equals(((JSONObject) other).keySet())) {
|
|
return false;
|
|
}
|
|
for (final String name : set) {
|
|
final Object valueThis = this.get(name);
|
|
final Object valueOther = ((JSONObject) other).get(name);
|
|
if (valueThis instanceof JSONObject) {
|
|
if (!((JSONObject) valueThis).similar(valueOther)) {
|
|
return false;
|
|
}
|
|
} else if (valueThis instanceof JSONArray) {
|
|
if (!((JSONArray) valueThis).similar(valueOther)) {
|
|
return false;
|
|
}
|
|
} else if (!valueThis.equals(valueOther)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
} catch (final Throwable exception) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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(final JSONArray names) throws JSONException {
|
|
if ((names == null) || (names.length() == 0)) {
|
|
return null;
|
|
}
|
|
final JSONArray ja = new JSONArray();
|
|
for (int i = 0; i < names.length(); i += 1) {
|
|
ja.put(this.opt(names.getString(i)));
|
|
}
|
|
return ja;
|
|
}
|
|
|
|
/**
|
|
* Make a JSON text of this JSONObject. For compactness, no whitespace is added. If this would not result in a
|
|
* syntactically correct JSON text, then null will be returned instead.
|
|
*
|
|
* Warning: This method assumes that the data structure is acyclical.
|
|
*
|
|
* @return a printable, displayable, portable, transmittable representation of the object, beginning with
|
|
* <code>{</code> <small>(left brace)</small> and ending with <code>}</code> <small>(right
|
|
* brace)</small>.
|
|
*/
|
|
@Override
|
|
public String toString() {
|
|
try {
|
|
return this.toString(0);
|
|
} catch (final Exception e) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Make a prettyprinted JSON text of this JSONObject.
|
|
*
|
|
* Warning: This method assumes that the data structure is acyclical.
|
|
*
|
|
* @param indentFactor The number of spaces to add to each level of indentation.
|
|
*
|
|
* @return a printable, displayable, portable, transmittable representation of the object, beginning with
|
|
* <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(final int indentFactor) throws JSONException {
|
|
final StringWriter w = new StringWriter();
|
|
synchronized (w.getBuffer()) {
|
|
return this.write(w, indentFactor, 0).toString();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Write the contents of the JSONObject as JSON text to a writer. For compactness, no whitespace is added.
|
|
*
|
|
* Warning: This method assumes that the data structure is acyclical.
|
|
*
|
|
* @return The writer.
|
|
*
|
|
* @throws JSONException
|
|
*/
|
|
public Writer write(final Writer writer) throws JSONException {
|
|
return this.write(writer, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* Write the contents of the JSONObject as JSON text to a writer. For compactness, no whitespace is added.
|
|
*
|
|
* Warning: This method assumes that the data structure is acyclical.
|
|
*
|
|
* @return The writer.
|
|
*
|
|
* @throws JSONException
|
|
*/
|
|
Writer write(final Writer writer, final int indentFactor, final int indent) throws JSONException {
|
|
try {
|
|
boolean commanate = false;
|
|
final int length = this.length();
|
|
final Iterator<String> keys = this.keys();
|
|
writer.write('{');
|
|
if (length == 1) {
|
|
final Object key = keys.next();
|
|
writer.write(quote(key.toString()));
|
|
writer.write(':');
|
|
if (indentFactor > 0) {
|
|
writer.write(' ');
|
|
}
|
|
writeValue(writer, this.map.get(key), indentFactor, indent);
|
|
} else if (length != 0) {
|
|
final int newindent = indent + indentFactor;
|
|
while (keys.hasNext()) {
|
|
final Object key = keys.next();
|
|
if (commanate) {
|
|
writer.write(',');
|
|
}
|
|
if (indentFactor > 0) {
|
|
writer.write('\n');
|
|
}
|
|
indent(writer, newindent);
|
|
writer.write(quote(key.toString()));
|
|
writer.write(':');
|
|
if (indentFactor > 0) {
|
|
writer.write(' ');
|
|
}
|
|
writeValue(writer, this.map.get(key), indentFactor, newindent);
|
|
commanate = true;
|
|
}
|
|
if (indentFactor > 0) {
|
|
writer.write('\n');
|
|
}
|
|
indent(writer, indent);
|
|
}
|
|
writer.write('}');
|
|
return writer;
|
|
} catch (final IOException exception) {
|
|
throw new JSONException(exception);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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() {
|
|
try {
|
|
return super.clone();
|
|
} catch (final Exception e) {
|
|
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(final Object object) {
|
|
return (object == null) || (object == this);
|
|
}
|
|
|
|
/**
|
|
* Get the "null" string value.
|
|
*
|
|
* @return The string "null".
|
|
*/
|
|
@Override
|
|
public String toString() {
|
|
return "null";
|
|
}
|
|
}
|
|
}
|