4949e6a995
git-svn-id: svn://svn.code.sf.net/p/writer2latex/code/trunk@72 f0f2a975-2e09-46c8-9428-3b39399b9f3c
1584 lines
No EOL
52 KiB
Java
1584 lines
No EOL
52 KiB
Java
package org.json;
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/*
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Copyright (c) 2002 JSON.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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The Software shall be used for Good, not Evil.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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import java.io.IOException;
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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.Modifier;
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import java.lang.reflect.Method;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.TreeSet;
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/**
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* A JSONObject is an unordered collection of name/value pairs. Its
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* external form is a string wrapped in curly braces with colons between the
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* names and values, and commas between the values and names. The internal form
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* is an object having <code>get</code> and <code>opt</code> methods for
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* accessing the values by name, and <code>put</code> methods for adding or
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* replacing values by name. The values can be any of these types:
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* <code>Boolean</code>, <code>JSONArray</code>, <code>JSONObject</code>,
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* <code>Number</code>, <code>String</code>, or the <code>JSONObject.NULL</code>
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* object. A JSONObject constructor can be used to convert an external form
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* JSON text into an internal form whose values can be retrieved with the
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* <code>get</code> and <code>opt</code> methods, or to convert values into a
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* JSON text using the <code>put</code> and <code>toString</code> methods.
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* A <code>get</code> method returns a value if one can be found, and throws an
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* exception if one cannot be found. An <code>opt</code> method returns a
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* default value instead of throwing an exception, and so is useful for
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* obtaining optional values.
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* <p>
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* The generic <code>get()</code> and <code>opt()</code> methods return an
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* object, which you can cast or query for type. There are also typed
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* <code>get</code> and <code>opt</code> methods that do type checking and type
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* coercion for you.
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* <p>
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* The <code>put</code> methods adds values to an object. For example, <pre>
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* myString = new JSONObject().put("JSON", "Hello, World!").toString();</pre>
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* produces the string <code>{"JSON": "Hello, World"}</code>.
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* <p>
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* The texts produced by the <code>toString</code> methods strictly conform to
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* the JSON syntax rules.
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* The constructors are more forgiving in the texts they will accept:
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* <ul>
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* <li>An extra <code>,</code> <small>(comma)</small> may appear just
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* before the closing brace.</li>
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* <li>Strings may be quoted with <code>'</code> <small>(single
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* quote)</small>.</li>
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* <li>Strings do not need to be quoted at all if they do not begin with a quote
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* or single quote, and if they do not contain leading or trailing spaces,
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* and if they do not contain any of these characters:
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* <code>{ } [ ] / \ : , = ; #</code> and if they do not look like numbers
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* and if they are not the reserved words <code>true</code>,
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* <code>false</code>, or <code>null</code>.</li>
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* <li>Keys can be followed by <code>=</code> or <code>=></code> as well as
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* by <code>:</code>.</li>
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* <li>Values can be followed by <code>;</code> <small>(semicolon)</small> as
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* well as by <code>,</code> <small>(comma)</small>.</li>
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* <li>Numbers may have the <code>0x-</code> <small>(hex)</small> prefix.</li>
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* </ul>
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* @author JSON.org
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* @version 2010-05-17
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*/
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public class JSONObject {
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/**
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* JSONObject.NULL is equivalent to the value that JavaScript calls null,
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* whilst Java's null is equivalent to the value that JavaScript calls
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* undefined.
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*/
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private static final class Null {
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/**
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* There is only intended to be a single instance of the NULL object,
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* so the clone method returns itself.
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* @return NULL.
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*/
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protected final Object clone() {
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return this;
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}
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/**
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* A Null object is equal to the null value and to itself.
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* @param object An object to test for nullness.
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* @return true if the object parameter is the JSONObject.NULL object
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* or null.
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*/
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public boolean equals(Object object) {
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return object == null || object == this;
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}
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/**
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* Get the "null" string value.
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* @return The string "null".
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*/
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public String toString() {
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return "null";
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}
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}
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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 Map map;
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/**
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* It is sometimes more convenient and less ambiguous to have a
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* <code>NULL</code> object than to use Java's <code>null</code> value.
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* <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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* Construct an empty JSONObject.
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*/
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public JSONObject() {
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this.map = new HashMap();
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}
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/**
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* Construct a JSONObject from a subset of another JSONObject.
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* An array of strings is used to identify the keys that should be copied.
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* Missing keys are ignored.
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* @param jo A JSONObject.
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* @param names An array of strings.
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* @throws JSONException
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* @exception 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(JSONObject jo, String[] names) {
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this();
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for (int i = 0; i < names.length; i += 1) {
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try {
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putOnce(names[i], jo.opt(names[i]));
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} catch (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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* @param x A JSONTokener object containing the source string.
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* @throws JSONException If there is a syntax error in the source string
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* or a duplicated key.
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*/
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public JSONObject(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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/*
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* The key is followed by ':'. We will also tolerate '=' or '=>'.
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*/
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c = x.nextClean();
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if (c == '=') {
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if (x.next() != '>') {
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x.back();
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}
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} else if (c != ':') {
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throw x.syntaxError("Expected a ':' after a key");
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}
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putOnce(key, x.nextValue());
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/*
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* Pairs are separated by ','. We will also tolerate ';'.
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*/
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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
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* the JSONObject.
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* @throws JSONException
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*/
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public JSONObject(Map map) {
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this.map = new HashMap();
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if (map != null) {
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Iterator i = map.entrySet().iterator();
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while (i.hasNext()) {
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Map.Entry e = (Map.Entry)i.next();
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this.map.put(e.getKey(), wrap(e.getValue()));
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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.
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* 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
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* with <code>"get"</code> or <code>"is"</code> followed by an uppercase letter,
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* 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.
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* If the second remaining character is not upper case, then the first
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* 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
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* if the result of calling <code>object.getName()</code> is <code>"Larry Fine"</code>,
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* then the JSONObject will contain <code>"name": "Larry Fine"</code>.
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*
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* @param bean An object that has getter methods that should be used
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* to make a JSONObject.
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*/
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public JSONObject(Object bean) {
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this();
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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
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* public members. The resulting JSONObject's keys will be the strings
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* from the names array, and the values will be the field values associated
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* with those keys in the object. If a key is not found or not visible,
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* then it will not be copied into the new JSONObject.
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* @param object An object that has fields that should be used to make a
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* JSONObject.
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* @param names An array of strings, the names of the fields to be obtained
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* from the object.
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*/
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public JSONObject(Object object, String names[]) {
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this();
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Class c = object.getClass();
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for (int i = 0; i < names.length; i += 1) {
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String name = names[i];
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try {
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putOpt(name, c.getField(name).get(object));
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} catch (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.
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* This is the most commonly used JSONObject constructor.
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* @param source A string beginning
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* with <code>{</code> <small>(left brace)</small> and ending
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* with <code>}</code> <small>(right brace)</small>.
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* @exception JSONException If there is a syntax error in the source
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* string or a duplicated key.
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*/
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public JSONObject(String source) throws JSONException {
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this(new JSONTokener(source));
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}
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/**
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* Accumulate values under a key. It is similar to the put method except
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* that if there is already an object stored under the key then a
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* JSONArray is stored under the key to hold all of the accumulated values.
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* If there is already a JSONArray, then the new value is appended to it.
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* In contrast, the put method replaces the previous value.
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* @param key A key string.
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* @param value An object to be accumulated under the key.
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* @return this.
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* @throws JSONException If the value is an invalid number
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* or if the key is null.
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*/
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public JSONObject accumulate(String key, Object value)
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throws JSONException {
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testValidity(value);
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Object o = opt(key);
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if (o == null) {
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put(key, value instanceof JSONArray ?
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new JSONArray().put(value) :
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value);
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} else if (o instanceof JSONArray) {
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((JSONArray)o).put(value);
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} else {
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put(key, new JSONArray().put(o).put(value));
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}
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return this;
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}
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/**
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* Append values to the array under a key. If the key does not exist in the
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* JSONObject, then the key is put in the JSONObject with its value being a
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* JSONArray containing the value parameter. If the key was already
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* associated with a JSONArray, then the value parameter is appended to it.
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* @param key A key string.
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* @param value An object to be accumulated under the key.
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* @return this.
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* @throws JSONException If the key is null or if the current value
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* associated with the key is not a JSONArray.
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*/
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public JSONObject append(String key, Object value) throws JSONException {
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testValidity(value);
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Object o = opt(key);
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if (o == null) {
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put(key, new JSONArray().put(value));
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} else if (o instanceof JSONArray) {
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put(key, ((JSONArray)o).put(value));
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} else {
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throw new JSONException("JSONObject[" + key +
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"] is not a JSONArray.");
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}
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return this;
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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
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* the number is not finite.
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* @param d A double.
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* @return A String.
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*/
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static public String doubleToString(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 s = Double.toString(d);
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if (s.indexOf('.') > 0 && s.indexOf('e') < 0 && s.indexOf('E') < 0) {
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while (s.endsWith("0")) {
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s = s.substring(0, s.length() - 1);
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}
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if (s.endsWith(".")) {
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s = s.substring(0, s.length() - 1);
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}
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}
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return s;
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}
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/**
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* Get the value object associated with a key.
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*
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* @param key A key string.
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* @return The object associated with the key.
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* @throws JSONException if the key is not found.
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*/
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public Object get(String key) throws JSONException {
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Object o = opt(key);
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if (o == null) {
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throw new JSONException("JSONObject[" + quote(key) +
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"] not found.");
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}
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return o;
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}
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/**
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* Get the boolean value associated with a key.
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*
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* @param key A key string.
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* @return The truth.
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* @throws JSONException
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* if the value is not a Boolean or the String "true" or "false".
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*/
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public boolean getBoolean(String key) throws JSONException {
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Object o = get(key);
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if (o.equals(Boolean.FALSE) ||
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(o instanceof String &&
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((String)o).equalsIgnoreCase("false"))) {
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return false;
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} else if (o.equals(Boolean.TRUE) ||
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(o instanceof String &&
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((String)o).equalsIgnoreCase("true"))) {
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return true;
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}
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throw new JSONException("JSONObject[" + quote(key) +
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"] is not a Boolean.");
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}
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/**
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* Get the double value associated with a key.
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* @param key A key string.
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* @return The numeric value.
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* @throws JSONException if the key is not found or
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* if the value is not a Number object and cannot be converted to a number.
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*/
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public double getDouble(String key) throws JSONException {
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Object o = get(key);
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try {
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return o instanceof Number ?
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((Number)o).doubleValue() :
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Double.valueOf((String)o).doubleValue();
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} catch (Exception e) {
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throw new JSONException("JSONObject[" + quote(key) +
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"] is not a number.");
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}
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}
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/**
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* Get the int value associated with a key.
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*
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* @param key A key string.
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* @return The integer value.
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* @throws JSONException if the key is not found or if the value cannot
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* be converted to an integer.
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*/
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public int getInt(String key) throws JSONException {
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Object o = get(key);
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try {
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return o instanceof Number ?
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((Number)o).intValue() :
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Integer.parseInt((String)o);
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} catch (Exception e) {
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throw new JSONException("JSONObject[" + quote(key) +
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"] is not an int.");
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}
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}
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/**
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* Get the JSONArray value associated with a key.
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*
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* @param key A key string.
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* @return A JSONArray which is the value.
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* @throws JSONException if the key is not found or
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* if the value is not a JSONArray.
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*/
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public JSONArray getJSONArray(String key) throws JSONException {
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Object o = get(key);
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if (o instanceof JSONArray) {
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return (JSONArray)o;
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}
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throw new JSONException("JSONObject[" + quote(key) +
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"] is not a JSONArray.");
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}
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/**
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* Get the JSONObject value associated with a key.
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*
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* @param key A key string.
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* @return A JSONObject which is the value.
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* @throws JSONException if the key is not found or
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* if the value is not a JSONObject.
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*/
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public JSONObject getJSONObject(String key) throws JSONException {
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Object o = get(key);
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if (o instanceof JSONObject) {
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return (JSONObject)o;
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}
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throw new JSONException("JSONObject[" + quote(key) +
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"] is not a JSONObject.");
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}
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/**
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* Get the long value associated with a key.
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*
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* @param key A key string.
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* @return The long value.
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* @throws JSONException if the key is not found or if the value cannot
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* be converted to a long.
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*/
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public long getLong(String key) throws JSONException {
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Object o = get(key);
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try {
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return o instanceof Number ?
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((Number)o).longValue() :
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Long.parseLong((String)o);
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} catch (Exception e) {
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|
throw new JSONException("JSONObject[" + quote(key) +
|
|
"] is not a long.");
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an array of field names from a JSONObject.
|
|
*
|
|
* @return An array of field names, or null if there are no names.
|
|
*/
|
|
public static String[] getNames(JSONObject jo) {
|
|
int length = jo.length();
|
|
if (length == 0) {
|
|
return null;
|
|
}
|
|
Iterator i = jo.keys();
|
|
String[] names = new String[length];
|
|
int j = 0;
|
|
while (i.hasNext()) {
|
|
names[j] = (String)i.next();
|
|
j += 1;
|
|
}
|
|
return names;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an array of field names from an Object.
|
|
*
|
|
* @return An array of field names, or null if there are no names.
|
|
*/
|
|
public static String[] getNames(Object object) {
|
|
if (object == null) {
|
|
return null;
|
|
}
|
|
Class klass = object.getClass();
|
|
Field[] fields = klass.getFields();
|
|
int length = fields.length;
|
|
if (length == 0) {
|
|
return null;
|
|
}
|
|
String[] names = new String[length];
|
|
for (int i = 0; i < length; i += 1) {
|
|
names[i] = fields[i].getName();
|
|
}
|
|
return names;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get the string associated with a key.
|
|
*
|
|
* @param key A key string.
|
|
* @return A string which is the value.
|
|
* @throws JSONException if the key is not found.
|
|
*/
|
|
public String getString(String key) throws JSONException {
|
|
return get(key).toString();
|
|
}
|
|
|
|
|
|
/**
|
|
* Determine if the JSONObject contains a specific key.
|
|
* @param key A key string.
|
|
* @return true if the key exists in the JSONObject.
|
|
*/
|
|
public boolean has(String key) {
|
|
return this.map.containsKey(key);
|
|
}
|
|
|
|
|
|
/**
|
|
* 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("Unable to increment [" + key + "].");
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Determine if the value associated with the key is null or if there is
|
|
* no value.
|
|
* @param key A key string.
|
|
* @return true if there is no value associated with the key or if
|
|
* the value is the JSONObject.NULL object.
|
|
*/
|
|
public boolean isNull(String key) {
|
|
return JSONObject.NULL.equals(opt(key));
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an enumeration of the keys of the JSONObject.
|
|
*
|
|
* @return An iterator of the keys.
|
|
*/
|
|
public Iterator keys() {
|
|
return this.map.keySet().iterator();
|
|
}
|
|
|
|
|
|
/**
|
|
* Get the number of keys stored in the JSONObject.
|
|
*
|
|
* @return The number of keys in the JSONObject.
|
|
*/
|
|
public int length() {
|
|
return this.map.size();
|
|
}
|
|
|
|
|
|
/**
|
|
* Produce a JSONArray containing the names of the elements of this
|
|
* JSONObject.
|
|
* @return A JSONArray containing the key strings, or null if the JSONObject
|
|
* is empty.
|
|
*/
|
|
public JSONArray names() {
|
|
JSONArray ja = new JSONArray();
|
|
Iterator keys = keys();
|
|
while (keys.hasNext()) {
|
|
ja.put(keys.next());
|
|
}
|
|
return ja.length() == 0 ? null : ja;
|
|
}
|
|
|
|
/**
|
|
* Produce a string from a Number.
|
|
* @param n A Number
|
|
* @return A String.
|
|
* @throws JSONException If n is a non-finite number.
|
|
*/
|
|
static public String numberToString(Number n)
|
|
throws JSONException {
|
|
if (n == null) {
|
|
throw new JSONException("Null pointer");
|
|
}
|
|
testValidity(n);
|
|
|
|
// Shave off trailing zeros and decimal point, if possible.
|
|
|
|
String s = n.toString();
|
|
if (s.indexOf('.') > 0 && s.indexOf('e') < 0 && s.indexOf('E') < 0) {
|
|
while (s.endsWith("0")) {
|
|
s = s.substring(0, s.length() - 1);
|
|
}
|
|
if (s.endsWith(".")) {
|
|
s = s.substring(0, s.length() - 1);
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional value associated with a key.
|
|
* @param key A key string.
|
|
* @return An object which is the value, or null if there is no value.
|
|
*/
|
|
public Object opt(String key) {
|
|
return key == null ? null : this.map.get(key);
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional boolean associated with a key.
|
|
* It returns false if there is no such key, or if the value is not
|
|
* Boolean.TRUE or the String "true".
|
|
*
|
|
* @param key A key string.
|
|
* @return The truth.
|
|
*/
|
|
public boolean optBoolean(String key) {
|
|
return optBoolean(key, false);
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional boolean associated with a key.
|
|
* It returns the defaultValue if there is no such key, or if it is not
|
|
* a Boolean or the String "true" or "false" (case insensitive).
|
|
*
|
|
* @param key A key string.
|
|
* @param defaultValue The default.
|
|
* @return The truth.
|
|
*/
|
|
public boolean optBoolean(String key, boolean defaultValue) {
|
|
try {
|
|
return getBoolean(key);
|
|
} catch (Exception e) {
|
|
return defaultValue;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional double associated with a key,
|
|
* or NaN if there is no such key or if its value is not a number.
|
|
* If the value is a string, an attempt will be made to evaluate it as
|
|
* a number.
|
|
*
|
|
* @param key A string which is the key.
|
|
* @return An object which is the value.
|
|
*/
|
|
public double optDouble(String key) {
|
|
return optDouble(key, Double.NaN);
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional double associated with a key, or the
|
|
* defaultValue if there is no such key or if its value is not a number.
|
|
* If the value is a string, an attempt will be made to evaluate it as
|
|
* a number.
|
|
*
|
|
* @param key A key string.
|
|
* @param defaultValue The default.
|
|
* @return An object which is the value.
|
|
*/
|
|
public double optDouble(String key, double defaultValue) {
|
|
try {
|
|
Object o = opt(key);
|
|
return o instanceof Number ? ((Number)o).doubleValue() :
|
|
new Double((String)o).doubleValue();
|
|
} catch (Exception e) {
|
|
return defaultValue;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional int value associated with a key,
|
|
* or zero if there is no such key or if the value is not a number.
|
|
* If the value is a string, an attempt will be made to evaluate it as
|
|
* a number.
|
|
*
|
|
* @param key A key string.
|
|
* @return An object which is the value.
|
|
*/
|
|
public int optInt(String key) {
|
|
return optInt(key, 0);
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional int value associated with a key,
|
|
* or the default if there is no such key or if the value is not a number.
|
|
* If the value is a string, an attempt will be made to evaluate it as
|
|
* a number.
|
|
*
|
|
* @param key A key string.
|
|
* @param defaultValue The default.
|
|
* @return An object which is the value.
|
|
*/
|
|
public int optInt(String key, int defaultValue) {
|
|
try {
|
|
return getInt(key);
|
|
} catch (Exception e) {
|
|
return defaultValue;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional JSONArray associated with a key.
|
|
* It returns null if there is no such key, or if its value is not a
|
|
* JSONArray.
|
|
*
|
|
* @param key A key string.
|
|
* @return A JSONArray which is the value.
|
|
*/
|
|
public JSONArray optJSONArray(String key) {
|
|
Object o = opt(key);
|
|
return o instanceof JSONArray ? (JSONArray)o : null;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional JSONObject associated with a key.
|
|
* It returns null if there is no such key, or if its value is not a
|
|
* JSONObject.
|
|
*
|
|
* @param key A key string.
|
|
* @return A JSONObject which is the value.
|
|
*/
|
|
public JSONObject optJSONObject(String key) {
|
|
Object o = opt(key);
|
|
return o instanceof JSONObject ? (JSONObject)o : null;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional long value associated with a key,
|
|
* or zero if there is no such key or if the value is not a number.
|
|
* If the value is a string, an attempt will be made to evaluate it as
|
|
* a number.
|
|
*
|
|
* @param key A key string.
|
|
* @return An object which is the value.
|
|
*/
|
|
public long optLong(String key) {
|
|
return optLong(key, 0);
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional long value associated with a key,
|
|
* or the default if there is no such key or if the value is not a number.
|
|
* If the value is a string, an attempt will be made to evaluate it as
|
|
* a number.
|
|
*
|
|
* @param key A key string.
|
|
* @param defaultValue The default.
|
|
* @return An object which is the value.
|
|
*/
|
|
public long optLong(String key, long defaultValue) {
|
|
try {
|
|
return getLong(key);
|
|
} catch (Exception e) {
|
|
return defaultValue;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional string associated with a key.
|
|
* It returns an empty string if there is no such key. If the value is not
|
|
* a string and is not null, then it is coverted to a string.
|
|
*
|
|
* @param key A key string.
|
|
* @return A string which is the value.
|
|
*/
|
|
public String optString(String key) {
|
|
return optString(key, "");
|
|
}
|
|
|
|
|
|
/**
|
|
* Get an optional string associated with a key.
|
|
* It returns the defaultValue if there is no such key.
|
|
*
|
|
* @param key A key string.
|
|
* @param defaultValue The default.
|
|
* @return A string which is the value.
|
|
*/
|
|
public String optString(String key, String defaultValue) {
|
|
Object o = opt(key);
|
|
return o != null ? o.toString() : defaultValue;
|
|
}
|
|
|
|
|
|
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 = "";
|
|
if (name.startsWith("get")) {
|
|
if (name.equals("getClass") ||
|
|
name.equals("getDeclaringClass")) {
|
|
key = "";
|
|
} else {
|
|
key = name.substring(3);
|
|
}
|
|
} else if (name.startsWith("is")) {
|
|
key = name.substring(2);
|
|
}
|
|
if (key.length() > 0 &&
|
|
Character.isUpperCase(key.charAt(0)) &&
|
|
method.getParameterTypes().length == 0) {
|
|
if (key.length() == 1) {
|
|
key = key.toLowerCase();
|
|
} else if (!Character.isUpperCase(key.charAt(1))) {
|
|
key = key.substring(0, 1).toLowerCase() +
|
|
key.substring(1);
|
|
}
|
|
|
|
Object result = method.invoke(bean, (Object[])null);
|
|
|
|
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, new Integer(value));
|
|
return this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Put a key/long pair in the JSONObject.
|
|
*
|
|
* @param key A key string.
|
|
* @param value A long which is the value.
|
|
* @return this.
|
|
* @throws JSONException If the key is null.
|
|
*/
|
|
public JSONObject put(String key, long value) throws JSONException {
|
|
put(key, new Long(value));
|
|
return this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Put a key/value pair in the JSONObject, where the value will be a
|
|
* JSONObject which is produced from a Map.
|
|
* @param key A key string.
|
|
* @param value A Map value.
|
|
* @return this.
|
|
* @throws JSONException
|
|
*/
|
|
public JSONObject put(String key, Map value) throws JSONException {
|
|
put(key, new JSONObject(value));
|
|
return this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Put a key/value pair in the JSONObject. If the value is null,
|
|
* then the key will be removed from the JSONObject if it is present.
|
|
* @param key A key string.
|
|
* @param value An object which is the value. It should be of one of these
|
|
* types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String,
|
|
* or the JSONObject.NULL object.
|
|
* @return this.
|
|
* @throws JSONException If the value is non-finite number
|
|
* or if the key is null.
|
|
*/
|
|
public JSONObject put(String key, Object value) throws JSONException {
|
|
if (key == null) {
|
|
throw new JSONException("Null key.");
|
|
}
|
|
if (value != null) {
|
|
testValidity(value);
|
|
this.map.put(key, value);
|
|
} else {
|
|
remove(key);
|
|
}
|
|
return this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Put a key/value pair in the JSONObject, but only if the key and the
|
|
* value are both non-null, and only if there is not already a member
|
|
* with that name.
|
|
* @param key
|
|
* @param value
|
|
* @return his.
|
|
* @throws JSONException if the key is a duplicate
|
|
*/
|
|
public JSONObject putOnce(String key, Object value) throws JSONException {
|
|
if (key != null && value != null) {
|
|
if (opt(key) != null) {
|
|
throw new JSONException("Duplicate key \"" + key + "\"");
|
|
}
|
|
put(key, value);
|
|
}
|
|
return this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Put a key/value pair in the JSONObject, but only if the
|
|
* key and the value are both non-null.
|
|
* @param key A key string.
|
|
* @param value An object which is the value. It should be of one of these
|
|
* types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String,
|
|
* or the JSONObject.NULL object.
|
|
* @return this.
|
|
* @throws JSONException If the value is a non-finite number.
|
|
*/
|
|
public JSONObject putOpt(String key, Object value) throws JSONException {
|
|
if (key != null && value != null) {
|
|
put(key, value);
|
|
}
|
|
return this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Produce a string in double quotes with backslash sequences in all the
|
|
* right places. A backslash will be inserted within </, allowing JSON
|
|
* text to be delivered in HTML. In JSON text, a string cannot contain a
|
|
* control character or an unescaped quote or backslash.
|
|
* @param string A String
|
|
* @return A String correctly formatted for insertion in a JSON text.
|
|
*/
|
|
public static String quote(String string) {
|
|
if (string == null || string.length() == 0) {
|
|
return "\"\"";
|
|
}
|
|
|
|
char b;
|
|
char c = 0;
|
|
int i;
|
|
int len = string.length();
|
|
StringBuffer sb = new StringBuffer(len + 4);
|
|
String t;
|
|
|
|
sb.append('"');
|
|
for (i = 0; i < len; i += 1) {
|
|
b = c;
|
|
c = string.charAt(i);
|
|
switch (c) {
|
|
case '\\':
|
|
case '"':
|
|
sb.append('\\');
|
|
sb.append(c);
|
|
break;
|
|
case '/':
|
|
if (b == '<') {
|
|
sb.append('\\');
|
|
}
|
|
sb.append(c);
|
|
break;
|
|
case '\b':
|
|
sb.append("\\b");
|
|
break;
|
|
case '\t':
|
|
sb.append("\\t");
|
|
break;
|
|
case '\n':
|
|
sb.append("\\n");
|
|
break;
|
|
case '\f':
|
|
sb.append("\\f");
|
|
break;
|
|
case '\r':
|
|
sb.append("\\r");
|
|
break;
|
|
default:
|
|
if (c < ' ' || (c >= '\u0080' && c < '\u00a0') ||
|
|
(c >= '\u2000' && c < '\u2100')) {
|
|
t = "000" + Integer.toHexString(c);
|
|
sb.append("\\u" + t.substring(t.length() - 4));
|
|
} 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);
|
|
}
|
|
|
|
/**
|
|
* Get an enumeration of the keys of the JSONObject.
|
|
* The keys will be sorted alphabetically.
|
|
*
|
|
* @return An iterator of the keys.
|
|
*/
|
|
public Iterator sortedKeys() {
|
|
return new TreeSet(this.map.keySet()).iterator();
|
|
}
|
|
|
|
/**
|
|
* Try to convert a string into a number, boolean, or null. If the string
|
|
* can't be converted, return the string.
|
|
* @param s A String.
|
|
* @return A simple JSON value.
|
|
*/
|
|
static public Object stringToValue(String s) {
|
|
if (s.equals("")) {
|
|
return s;
|
|
}
|
|
if (s.equalsIgnoreCase("true")) {
|
|
return Boolean.TRUE;
|
|
}
|
|
if (s.equalsIgnoreCase("false")) {
|
|
return Boolean.FALSE;
|
|
}
|
|
if (s.equalsIgnoreCase("null")) {
|
|
return JSONObject.NULL;
|
|
}
|
|
|
|
/*
|
|
* If it might be a number, try converting it.
|
|
* We support the 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 = s.charAt(0);
|
|
if ((b >= '0' && b <= '9') || b == '.' || b == '-' || b == '+') {
|
|
if (b == '0' && s.length() > 2 &&
|
|
(s.charAt(1) == 'x' || s.charAt(1) == 'X')) {
|
|
try {
|
|
return new Integer(Integer.parseInt(s.substring(2), 16));
|
|
} catch (Exception ignore) {
|
|
}
|
|
}
|
|
try {
|
|
if (s.indexOf('.') > -1 ||
|
|
s.indexOf('e') > -1 || s.indexOf('E') > -1) {
|
|
return Double.valueOf(s);
|
|
} else {
|
|
Long myLong = new Long(s);
|
|
if (myLong.longValue() == myLong.intValue()) {
|
|
return new Integer(myLong.intValue());
|
|
} else {
|
|
return myLong;
|
|
}
|
|
}
|
|
} catch (Exception ignore) {
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
|
|
/**
|
|
* Throw an exception if the object is an NaN or infinite number.
|
|
* @param o The object to test.
|
|
* @throws JSONException If o is a non-finite number.
|
|
*/
|
|
static void testValidity(Object o) throws JSONException {
|
|
if (o != null) {
|
|
if (o instanceof Double) {
|
|
if (((Double)o).isInfinite() || ((Double)o).isNaN()) {
|
|
throw new JSONException(
|
|
"JSON does not allow non-finite numbers.");
|
|
}
|
|
} else if (o instanceof Float) {
|
|
if (((Float)o).isInfinite() || ((Float)o).isNaN()) {
|
|
throw new JSONException(
|
|
"JSON does not allow non-finite numbers.");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Produce a JSONArray containing the values of the members of this
|
|
* JSONObject.
|
|
* @param names A JSONArray containing a list of key strings. This
|
|
* determines the sequence of the values in the result.
|
|
* @return A JSONArray of values.
|
|
* @throws JSONException If any of the values are non-finite numbers.
|
|
*/
|
|
public JSONArray toJSONArray(JSONArray names) throws JSONException {
|
|
if (names == null || names.length() == 0) {
|
|
return null;
|
|
}
|
|
JSONArray ja = new JSONArray();
|
|
for (int i = 0; i < names.length(); i += 1) {
|
|
ja.put(this.opt(names.getString(i)));
|
|
}
|
|
return ja;
|
|
}
|
|
|
|
/**
|
|
* Make a JSON text of this JSONObject. For compactness, no whitespace
|
|
* is added. If this would not result in a syntactically correct JSON text,
|
|
* then null will be returned instead.
|
|
* <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>.
|
|
*/
|
|
public String toString() {
|
|
try {
|
|
Iterator keys = keys();
|
|
StringBuffer sb = new StringBuffer("{");
|
|
|
|
while (keys.hasNext()) {
|
|
if (sb.length() > 1) {
|
|
sb.append(',');
|
|
}
|
|
Object o = keys.next();
|
|
sb.append(quote(o.toString()));
|
|
sb.append(':');
|
|
sb.append(valueToString(this.map.get(o)));
|
|
}
|
|
sb.append('}');
|
|
return sb.toString();
|
|
} catch (Exception e) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* 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 j;
|
|
int n = length();
|
|
if (n == 0) {
|
|
return "{}";
|
|
}
|
|
Iterator keys = sortedKeys();
|
|
StringBuffer sb = new StringBuffer("{");
|
|
int newindent = indent + indentFactor;
|
|
Object o;
|
|
if (n == 1) {
|
|
o = keys.next();
|
|
sb.append(quote(o.toString()));
|
|
sb.append(": ");
|
|
sb.append(valueToString(this.map.get(o), indentFactor,
|
|
indent));
|
|
} else {
|
|
while (keys.hasNext()) {
|
|
o = keys.next();
|
|
if (sb.length() > 1) {
|
|
sb.append(",\n");
|
|
} else {
|
|
sb.append('\n');
|
|
}
|
|
for (j = 0; j < newindent; j += 1) {
|
|
sb.append(' ');
|
|
}
|
|
sb.append(quote(o.toString()));
|
|
sb.append(": ");
|
|
sb.append(valueToString(this.map.get(o), indentFactor,
|
|
newindent));
|
|
}
|
|
if (sb.length() > 1) {
|
|
sb.append('\n');
|
|
for (j = 0; j < indent; j += 1) {
|
|
sb.append(' ');
|
|
}
|
|
}
|
|
}
|
|
sb.append('}');
|
|
return sb.toString();
|
|
}
|
|
|
|
|
|
/**
|
|
* Make a JSON text of an Object value. If the object has an
|
|
* value.toJSONString() method, then that method will be used to produce
|
|
* the JSON text. The method is required to produce a strictly
|
|
* conforming text. If the object does not contain a toJSONString
|
|
* method (which is the most common case), then a text will be
|
|
* produced by other means. If the value is an array or Collection,
|
|
* then a JSONArray will be made from it and its toJSONString method
|
|
* will be called. If the value is a MAP, then a JSONObject will be made
|
|
* from it and its toJSONString method will be called. Otherwise, the
|
|
* value's toString method will be called, and the result will be quoted.
|
|
*
|
|
* <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.
|
|
*/
|
|
static String valueToString(Object value) throws JSONException {
|
|
if (value == null || value.equals(null)) {
|
|
return "null";
|
|
}
|
|
if (value instanceof JSONString) {
|
|
Object o;
|
|
try {
|
|
o = ((JSONString)value).toJSONString();
|
|
} catch (Exception e) {
|
|
throw new JSONException(e);
|
|
}
|
|
if (o instanceof String) {
|
|
return (String)o;
|
|
}
|
|
throw new JSONException("Bad value from toJSONString: " + o);
|
|
}
|
|
if (value instanceof Number) {
|
|
return numberToString((Number) value);
|
|
}
|
|
if (value instanceof Boolean || value instanceof JSONObject ||
|
|
value instanceof JSONArray) {
|
|
return value.toString();
|
|
}
|
|
if (value instanceof Map) {
|
|
return new JSONObject((Map)value).toString();
|
|
}
|
|
if (value instanceof Collection) {
|
|
return new JSONArray((Collection)value).toString();
|
|
}
|
|
if (value.getClass().isArray()) {
|
|
return new JSONArray(value).toString();
|
|
}
|
|
return quote(value.toString());
|
|
}
|
|
|
|
|
|
/**
|
|
* Make a prettyprinted JSON text of an object value.
|
|
* <p>
|
|
* Warning: This method assumes that the data structure is acyclical.
|
|
* @param value The value to be serialized.
|
|
* @param indentFactor The number of spaces to add to each level of
|
|
* indentation.
|
|
* @param indent The indentation of the top level.
|
|
* @return a printable, displayable, transmittable
|
|
* representation of the object, beginning
|
|
* with <code>{</code> <small>(left brace)</small> and ending
|
|
* with <code>}</code> <small>(right brace)</small>.
|
|
* @throws JSONException If the object contains an invalid number.
|
|
*/
|
|
static String valueToString(Object value, int indentFactor, int indent)
|
|
throws JSONException {
|
|
if (value == null || value.equals(null)) {
|
|
return "null";
|
|
}
|
|
try {
|
|
if (value instanceof JSONString) {
|
|
Object o = ((JSONString)value).toJSONString();
|
|
if (o instanceof String) {
|
|
return (String)o;
|
|
}
|
|
}
|
|
} catch (Exception ignore) {
|
|
}
|
|
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
|
|
*/
|
|
static Object wrap(Object object) {
|
|
try {
|
|
if (object == null) {
|
|
return NULL;
|
|
}
|
|
if (object instanceof JSONObject || object instanceof JSONArray ||
|
|
NULL.equals(object) || object instanceof JSONString ||
|
|
object instanceof Byte || object instanceof Character ||
|
|
object instanceof Short || object instanceof Integer ||
|
|
object instanceof Long || object instanceof Boolean ||
|
|
object instanceof Float || object instanceof Double ||
|
|
object instanceof String) {
|
|
return object;
|
|
}
|
|
|
|
if (object instanceof Collection) {
|
|
return new JSONArray((Collection)object);
|
|
}
|
|
if (object.getClass().isArray()) {
|
|
return new JSONArray(object);
|
|
}
|
|
if (object instanceof Map) {
|
|
return new JSONObject((Map)object);
|
|
}
|
|
Package objectPackage = object.getClass().getPackage();
|
|
String objectPackageName = ( objectPackage != null ? objectPackage.getName() : "" );
|
|
if (objectPackageName.startsWith("java.") ||
|
|
objectPackageName.startsWith("javax.") ||
|
|
object.getClass().getClassLoader() == null) {
|
|
return object.toString();
|
|
}
|
|
return new JSONObject(object);
|
|
} catch(Exception exception) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Write the contents of the JSONObject as JSON text to a writer.
|
|
* For compactness, no whitespace is added.
|
|
* <p>
|
|
* Warning: This method assumes that the data structure is acyclical.
|
|
*
|
|
* @return The writer.
|
|
* @throws JSONException
|
|
*/
|
|
public Writer write(Writer writer) throws JSONException {
|
|
try {
|
|
boolean b = false;
|
|
Iterator keys = keys();
|
|
writer.write('{');
|
|
|
|
while (keys.hasNext()) {
|
|
if (b) {
|
|
writer.write(',');
|
|
}
|
|
Object k = keys.next();
|
|
writer.write(quote(k.toString()));
|
|
writer.write(':');
|
|
Object v = this.map.get(k);
|
|
if (v instanceof JSONObject) {
|
|
((JSONObject)v).write(writer);
|
|
} else if (v instanceof JSONArray) {
|
|
((JSONArray)v).write(writer);
|
|
} else {
|
|
writer.write(valueToString(v));
|
|
}
|
|
b = true;
|
|
}
|
|
writer.write('}');
|
|
return writer;
|
|
} catch (IOException exception) {
|
|
throw new JSONException(exception);
|
|
}
|
|
}
|
|
} |