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Diffstat (limited to 'server/src/com/vaadin/external/json/JSONObject.java')
| -rw-r--r-- | server/src/com/vaadin/external/json/JSONObject.java | 1693 |
1 files changed, 0 insertions, 1693 deletions
diff --git a/server/src/com/vaadin/external/json/JSONObject.java b/server/src/com/vaadin/external/json/JSONObject.java deleted file mode 100644 index ba772933be..0000000000 --- a/server/src/com/vaadin/external/json/JSONObject.java +++ /dev/null @@ -1,1693 +0,0 @@ -package com.vaadin.external.json; - -/* - Copyright (c) 2002 JSON.org - - Permission is hereby granted, free of charge, to any person obtaining a copy - of this software and associated documentation files (the "Software"), to deal - in the Software without restriction, including without limitation the rights - to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - copies of the Software, and to permit persons to whom the Software is - furnished to do so, subject to the following conditions: - - The above copyright notice and this permission notice shall be included in all - copies or substantial portions of the Software. - - The Software shall be used for Good, not Evil. - - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - SOFTWARE. - */ - -import java.io.IOException; -import java.io.Serializable; -import java.io.Writer; -import java.lang.reflect.Field; -import java.lang.reflect.Method; -import java.lang.reflect.Modifier; -import java.util.Collection; -import java.util.Enumeration; -import java.util.HashMap; -import java.util.Iterator; -import java.util.Locale; -import java.util.Map; -import java.util.ResourceBundle; - -/** - * A JSONObject is an unordered collection of name/value pairs. Its external - * form is a string wrapped in curly braces with colons between the names and - * values, and commas between the values and names. The internal form is an - * object having <code>get</code> and <code>opt</code> methods for accessing the - * values by name, and <code>put</code> methods for adding or replacing values - * by name. The values can be any of these types: <code>Boolean</code>, - * <code>JSONArray</code>, <code>JSONObject</code>, <code>Number</code>, - * <code>String</code>, or the <code>JSONObject.NULL</code> object. A JSONObject - * constructor can be used to convert an external form JSON text into an - * internal form whose values can be retrieved with the <code>get</code> and - * <code>opt</code> methods, or to convert values into a JSON text using the - * <code>put</code> and <code>toString</code> methods. A <code>get</code> method - * returns a value if one can be found, and throws an exception if one cannot be - * found. An <code>opt</code> method returns a default value instead of throwing - * an exception, and so is useful for obtaining optional values. - * <p> - * The generic <code>get()</code> and <code>opt()</code> methods return an - * object, which you can cast or query for type. There are also typed - * <code>get</code> and <code>opt</code> methods that do type checking and type - * coercion for you. The opt methods differ from the get methods in that they do - * not throw. Instead, they return a specified value, such as null. - * <p> - * The <code>put</code> methods add or replace values in an object. For example, - * - * <pre> - * myString = new JSONObject().put("JSON", "Hello, World!").toString(); - * </pre> - * - * produces the string <code>{"JSON": "Hello, World"}</code>. - * <p> - * The texts produced by the <code>toString</code> methods strictly conform to - * the JSON syntax rules. The constructors are more forgiving in the texts they - * will accept: - * <ul> - * <li>An extra <code>,</code> <small>(comma)</small> may appear just - * before the closing brace.</li> - * <li>Strings may be quoted with <code>'</code> <small>(single - * quote)</small>.</li> - * <li>Strings do not need to be quoted at all if they do not begin with a quote - * or single quote, and if they do not contain leading or trailing spaces, and - * if they do not contain any of these characters: - * <code>{ } [ ] / \ : , = ; #</code> and if they do not look like numbers and - * if they are not the reserved words <code>true</code>, <code>false</code>, or - * <code>null</code>.</li> - * <li>Keys can be followed by <code>=</code> or <code>=></code> as well as by - * <code>:</code>.</li> - * <li>Values can be followed by <code>;</code> <small>(semicolon)</small> as - * well as by <code>,</code> <small>(comma)</small>.</li> - * <li>Numbers may have the <code>0x-</code> <small>(hex)</small> prefix.</li> - * </ul> - * - * @author JSON.org - * @version 2011-10-16 - */ -public class JSONObject implements Serializable { - - /** - * 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 implements Serializable { - - /** - * There is only intended to be a single instance of the NULL object, so - * the clone method returns itself. - * - * @return NULL. - */ - @Override - protected final Object clone() { - return this; - } - - /** - * A Null object is equal to the null value and to itself. - * - * @param object - * An object to test for nullness. - * @return true if the object parameter is the JSONObject.NULL object or - * null. - */ - @Override - public boolean equals(Object object) { - return object == null || object == this; - } - - /** - * Get the "null" string value. - * - * @return The string "null". - */ - @Override - public String toString() { - return "null"; - } - } - - /** - * The map where the JSONObject's properties are kept. - */ - private Map map; - - /** - * It is sometimes more convenient and less ambiguous to have a - * <code>NULL</code> object than to use Java's <code>null</code> value. - * <code>JSONObject.NULL.equals(null)</code> returns <code>true</code>. - * <code>JSONObject.NULL.toString()</code> returns <code>"null"</code>. - */ - public static final Object NULL = new Null(); - - /** - * Construct an empty JSONObject. - */ - public JSONObject() { - map = new HashMap(); - } - - /** - * Construct a JSONObject from a subset of another JSONObject. An array of - * strings is used to identify the keys that should be copied. Missing keys - * are ignored. - * - * @param jo - * A JSONObject. - * @param names - * An array of strings. - * @throws JSONException - * @exception JSONException - * If a value is a non-finite number or if a name is - * duplicated. - */ - public JSONObject(JSONObject jo, String[] names) { - this(); - for (int i = 0; i < names.length; i += 1) { - try { - putOnce(names[i], jo.opt(names[i])); - } catch (Exception ignore) { - } - } - } - - /** - * Construct a JSONObject from a JSONTokener. - * - * @param x - * A JSONTokener object containing the source string. - * @throws JSONException - * If there is a syntax error in the source string or a - * duplicated key. - */ - public JSONObject(JSONTokener x) throws JSONException { - this(); - char c; - String key; - - if (x.nextClean() != '{') { - throw x.syntaxError("A JSONObject text must begin with '{'"); - } - for (;;) { - c = x.nextClean(); - switch (c) { - case 0: - throw x.syntaxError("A JSONObject text must end with '}'"); - case '}': - return; - default: - x.back(); - key = x.nextValue().toString(); - } - - // The key is followed by ':'. We will also tolerate '=' or '=>'. - - c = x.nextClean(); - if (c == '=') { - if (x.next() != '>') { - x.back(); - } - } else if (c != ':') { - throw x.syntaxError("Expected a ':' after a key"); - } - putOnce(key, x.nextValue()); - - // Pairs are separated by ','. We will also tolerate ';'. - - switch (x.nextClean()) { - case ';': - case ',': - if (x.nextClean() == '}') { - return; - } - x.back(); - break; - case '}': - return; - default: - throw x.syntaxError("Expected a ',' or '}'"); - } - } - } - - /** - * Construct a JSONObject from a Map. - * - * @param map - * A map object that can be used to initialize the contents of - * the JSONObject. - * @throws JSONException - */ - public JSONObject(Map map) { - this.map = new HashMap(); - if (map != null) { - Iterator i = map.entrySet().iterator(); - while (i.hasNext()) { - Map.Entry e = (Map.Entry) i.next(); - Object value = e.getValue(); - if (value != null) { - this.map.put(e.getKey(), wrap(value)); - } - } - } - } - - /** - * Construct a JSONObject from an Object using bean getters. It reflects on - * all of the public methods of the object. For each of the methods with no - * parameters and a name starting with <code>"get"</code> or - * <code>"is"</code> followed by an uppercase letter, the method is invoked, - * and a key and the value returned from the getter method are put into the - * new JSONObject. - * - * The key is formed by removing the <code>"get"</code> or <code>"is"</code> - * prefix. If the second remaining character is not upper case, then the - * first character is converted to lower case. - * - * For example, if an object has a method named <code>"getName"</code>, and - * if the result of calling <code>object.getName()</code> is - * <code>"Larry Fine"</code>, then the JSONObject will contain - * <code>"name": "Larry Fine"</code>. - * - * @param bean - * An object that has getter methods that should be used to make - * a JSONObject. - */ - public JSONObject(Object bean) { - this(); - populateMap(bean); - } - - /** - * Construct a JSONObject from an Object, using reflection to find the - * public members. The resulting JSONObject's keys will be the strings from - * the names array, and the values will be the field values associated with - * those keys in the object. If a key is not found or not visible, then it - * will not be copied into the new JSONObject. - * - * @param object - * An object that has fields that should be used to make a - * JSONObject. - * @param names - * An array of strings, the names of the fields to be obtained - * from the object. - */ - public JSONObject(Object object, String names[]) { - this(); - Class c = object.getClass(); - for (int i = 0; i < names.length; i += 1) { - String name = names[i]; - try { - putOpt(name, c.getField(name).get(object)); - } catch (Exception ignore) { - } - } - } - - /** - * Construct a JSONObject from a source JSON text string. This is the most - * commonly used JSONObject constructor. - * - * @param source - * A string beginning with <code>{</code> <small>(left - * brace)</small> and ending with <code>}</code> - * <small>(right brace)</small>. - * @exception JSONException - * If there is a syntax error in the source string or a - * duplicated key. - */ - public JSONObject(String source) throws JSONException { - this(new JSONTokener(source)); - } - - /** - * Construct a JSONObject from a ResourceBundle. - * - * @param baseName - * The ResourceBundle base name. - * @param locale - * The Locale to load the ResourceBundle for. - * @throws JSONException - * If any JSONExceptions are detected. - */ - public JSONObject(String baseName, Locale locale) throws JSONException { - this(); - ResourceBundle bundle = ResourceBundle.getBundle(baseName, locale, - Thread.currentThread().getContextClassLoader()); - - // Iterate through the keys in the bundle. - - Enumeration keys = bundle.getKeys(); - while (keys.hasMoreElements()) { - Object key = keys.nextElement(); - if (key instanceof String) { - - // Go through the path, ensuring that there is a nested - // JSONObject for each - // segment except the last. Add the value using the last - // segment's name into - // the deepest nested JSONObject. - - String[] path = ((String) key).split("\\."); - int last = path.length - 1; - JSONObject target = this; - for (int i = 0; i < last; i += 1) { - String segment = path[i]; - JSONObject nextTarget = target.optJSONObject(segment); - if (nextTarget == null) { - nextTarget = new JSONObject(); - target.put(segment, nextTarget); - } - target = nextTarget; - } - target.put(path[last], bundle.getString((String) key)); - } - } - } - - /** - * Accumulate values under a key. It is similar to the put method except - * that if there is already an object stored under the key then a JSONArray - * is stored under the key to hold all of the accumulated values. If there - * is already a JSONArray, then the new value is appended to it. In - * contrast, the put method replaces the previous value. - * - * If only one value is accumulated that is not a JSONArray, then the result - * will be the same as using put. But if multiple values are accumulated, - * then the result will be like append. - * - * @param key - * A key string. - * @param value - * An object to be accumulated under the key. - * @return this. - * @throws JSONException - * If the value is an invalid number or if the key is null. - */ - public JSONObject accumulate(String key, Object value) throws JSONException { - testValidity(value); - Object object = opt(key); - if (object == null) { - put(key, value instanceof JSONArray ? new JSONArray().put(value) - : value); - } else if (object instanceof JSONArray) { - ((JSONArray) object).put(value); - } else { - put(key, new JSONArray().put(object).put(value)); - } - return this; - } - - /** - * Append values to the array under a key. If the key does not exist in the - * JSONObject, then the key is put in the JSONObject with its value being a - * JSONArray containing the value parameter. If the key was already - * associated with a JSONArray, then the value parameter is appended to it. - * - * @param key - * A key string. - * @param value - * An object to be accumulated under the key. - * @return this. - * @throws JSONException - * If the key is null or if the current value associated with - * the key is not a JSONArray. - */ - public JSONObject append(String key, Object value) throws JSONException { - testValidity(value); - Object object = opt(key); - if (object == null) { - put(key, new JSONArray().put(value)); - } else if (object instanceof JSONArray) { - put(key, ((JSONArray) object).put(value)); - } else { - throw new JSONException("JSONObject[" + key - + "] is not a JSONArray."); - } - return this; - } - - /** - * Produce a string from a double. The string "null" will be returned if the - * number is not finite. - * - * @param d - * A double. - * @return A String. - */ - public static String doubleToString(double d) { - if (Double.isInfinite(d) || Double.isNaN(d)) { - return "null"; - } - - // Shave off trailing zeros and decimal point, if possible. - - String string = Double.toString(d); - if (string.indexOf('.') > 0 && string.indexOf('e') < 0 - && string.indexOf('E') < 0) { - while (string.endsWith("0")) { - string = string.substring(0, string.length() - 1); - } - if (string.endsWith(".")) { - string = string.substring(0, string.length() - 1); - } - } - return string; - } - - /** - * Get the value object associated with a key. - * - * @param key - * A key string. - * @return The object associated with the key. - * @throws JSONException - * if the key is not found. - */ - public Object get(String key) throws JSONException { - if (key == null) { - throw new JSONException("Null key."); - } - Object object = opt(key); - if (object == null) { - throw new JSONException("JSONObject[" + quote(key) + "] not found."); - } - return object; - } - - /** - * Get the boolean value associated with a key. - * - * @param key - * A key string. - * @return The truth. - * @throws JSONException - * if the value is not a Boolean or the String "true" or - * "false". - */ - public boolean getBoolean(String key) throws JSONException { - Object object = get(key); - if (object.equals(Boolean.FALSE) - || (object instanceof String && ((String) object) - .equalsIgnoreCase("false"))) { - return false; - } else if (object.equals(Boolean.TRUE) - || (object instanceof String && ((String) object) - .equalsIgnoreCase("true"))) { - return true; - } - throw new JSONException("JSONObject[" + quote(key) - + "] is not a Boolean."); - } - - /** - * Get the double value associated with a key. - * - * @param key - * A key string. - * @return The numeric value. - * @throws JSONException - * if the key is not found or if the value is not a Number - * object and cannot be converted to a number. - */ - public double getDouble(String key) throws JSONException { - Object object = get(key); - try { - return object instanceof Number ? ((Number) object).doubleValue() - : Double.parseDouble((String) object); - } catch (Exception e) { - throw new JSONException("JSONObject[" + quote(key) - + "] is not a number."); - } - } - - /** - * Get the int value associated with a key. - * - * @param key - * A key string. - * @return The integer value. - * @throws JSONException - * if the key is not found or if the value cannot be converted - * to an integer. - */ - public int getInt(String key) throws JSONException { - Object object = get(key); - try { - return object instanceof Number ? ((Number) object).intValue() - : Integer.parseInt((String) object); - } catch (Exception e) { - throw new JSONException("JSONObject[" + quote(key) - + "] is not an int."); - } - } - - /** - * Get the JSONArray value associated with a key. - * - * @param key - * A key string. - * @return A JSONArray which is the value. - * @throws JSONException - * if the key is not found or if the value is not a JSONArray. - */ - public JSONArray getJSONArray(String key) throws JSONException { - Object object = get(key); - if (object instanceof JSONArray) { - return (JSONArray) object; - } - throw new JSONException("JSONObject[" + quote(key) - + "] is not a JSONArray."); - } - - /** - * Get the JSONObject value associated with a key. - * - * @param key - * A key string. - * @return A JSONObject which is the value. - * @throws JSONException - * if the key is not found or if the value is not a JSONObject. - */ - public JSONObject getJSONObject(String key) throws JSONException { - Object object = get(key); - if (object instanceof JSONObject) { - return (JSONObject) object; - } - throw new JSONException("JSONObject[" + quote(key) - + "] is not a JSONObject."); - } - - /** - * Get the long value associated with a key. - * - * @param key - * A key string. - * @return The long value. - * @throws JSONException - * if the key is not found or if the value cannot be converted - * to a long. - */ - public long getLong(String key) throws JSONException { - Object object = get(key); - try { - return object instanceof Number ? ((Number) object).longValue() - : Long.parseLong((String) object); - } catch (Exception e) { - throw new JSONException("JSONObject[" + quote(key) - + "] is not a long."); - } - } - - /** - * Get an array of field names from a JSONObject. - * - * @return An array of field names, or null if there are no names. - */ - public static String[] getNames(JSONObject jo) { - int length = jo.length(); - if (length == 0) { - return null; - } - Iterator iterator = jo.keys(); - String[] names = new String[length]; - int i = 0; - while (iterator.hasNext()) { - names[i] = (String) iterator.next(); - i += 1; - } - return names; - } - - /** - * Get an array of field names from an Object. - * - * @return An array of field names, or null if there are no names. - */ - public static String[] getNames(Object object) { - if (object == null) { - return null; - } - Class klass = object.getClass(); - Field[] fields = klass.getFields(); - int length = fields.length; - if (length == 0) { - return null; - } - String[] names = new String[length]; - for (int i = 0; i < length; i += 1) { - names[i] = fields[i].getName(); - } - return names; - } - - /** - * Get the string associated with a key. - * - * @param key - * A key string. - * @return A string which is the value. - * @throws JSONException - * if there is no string value for the key. - */ - public String getString(String key) throws JSONException { - Object object = get(key); - if (object instanceof String) { - return (String) object; - } - throw new JSONException("JSONObject[" + quote(key) + "] not a string."); - } - - /** - * Determine if the JSONObject contains a specific key. - * - * @param key - * A key string. - * @return true if the key exists in the JSONObject. - */ - public boolean has(String key) { - return map.containsKey(key); - } - - /** - * Increment a property of a JSONObject. If there is no such property, - * create one with a value of 1. If there is such a property, and if it is - * an Integer, Long, Double, or Float, then add one to it. - * - * @param key - * A key string. - * @return this. - * @throws JSONException - * If there is already a property with this name that is not an - * Integer, Long, Double, or Float. - */ - public JSONObject increment(String key) throws JSONException { - Object value = opt(key); - if (value == null) { - 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 [" + quote(key) + "]."); - } - return this; - } - - /** - * Determine if the value associated with the key is null or if there is no - * value. - * - * @param key - * A key string. - * @return true if there is no value associated with the key or if the value - * is the JSONObject.NULL object. - */ - public boolean isNull(String key) { - return JSONObject.NULL.equals(opt(key)); - } - - /** - * Get an enumeration of the keys of the JSONObject. - * - * @return An iterator of the keys. - */ - public Iterator keys() { - return map.keySet().iterator(); - } - - /** - * Get the number of keys stored in the JSONObject. - * - * @return The number of keys in the JSONObject. - */ - public int length() { - return map.size(); - } - - /** - * Produce a JSONArray containing the names of the elements of this - * JSONObject. - * - * @return A JSONArray containing the key strings, or null if the JSONObject - * is empty. - */ - public JSONArray names() { - JSONArray ja = new JSONArray(); - Iterator keys = keys(); - while (keys.hasNext()) { - ja.put(keys.next()); - } - return ja.length() == 0 ? null : ja; - } - - /** - * Produce a string from a Number. - * - * @param number - * A Number - * @return A String. - * @throws JSONException - * If n is a non-finite number. - */ - public static String numberToString(Number number) throws JSONException { - if (number == null) { - throw new JSONException("Null pointer"); - } - testValidity(number); - - // Shave off trailing zeros and decimal point, if possible. - - String string = number.toString(); - if (string.indexOf('.') > 0 && string.indexOf('e') < 0 - && string.indexOf('E') < 0) { - while (string.endsWith("0")) { - string = string.substring(0, string.length() - 1); - } - if (string.endsWith(".")) { - string = string.substring(0, string.length() - 1); - } - } - return string; - } - - /** - * Get an optional value associated with a key. - * - * @param key - * A key string. - * @return An object which is the value, or null if there is no value. - */ - public Object opt(String key) { - return key == null ? null : map.get(key); - } - - /** - * Get an optional boolean associated with a key. It returns false if there - * is no such key, or if the value is not Boolean.TRUE or the String "true". - * - * @param key - * A key string. - * @return The truth. - */ - public boolean optBoolean(String key) { - return optBoolean(key, false); - } - - /** - * Get an optional boolean associated with a key. It returns the - * defaultValue if there is no such key, or if it is not a Boolean or the - * String "true" or "false" (case insensitive). - * - * @param key - * A key string. - * @param defaultValue - * The default. - * @return The truth. - */ - public boolean optBoolean(String key, boolean defaultValue) { - try { - return getBoolean(key); - } catch (Exception e) { - return defaultValue; - } - } - - /** - * Get an optional double associated with a key, or NaN if there is no such - * key or if its value is not a number. If the value is a string, an attempt - * will be made to evaluate it as a number. - * - * @param key - * A string which is the key. - * @return An object which is the value. - */ - public double optDouble(String key) { - return optDouble(key, Double.NaN); - } - - /** - * Get an optional double associated with a key, or the defaultValue if - * there is no such key or if its value is not a number. If the value is a - * string, an attempt will be made to evaluate it as a number. - * - * @param key - * A key string. - * @param defaultValue - * The default. - * @return An object which is the value. - */ - public double optDouble(String key, double defaultValue) { - try { - return getDouble(key); - } catch (Exception e) { - return defaultValue; - } - } - - /** - * Get an optional int value associated with a key, or zero if there is no - * such key or if the value is not a number. If the value is a string, an - * attempt will be made to evaluate it as a number. - * - * @param key - * A key string. - * @return An object which is the value. - */ - public int optInt(String key) { - return optInt(key, 0); - } - - /** - * Get an optional int value associated with a key, or the default if there - * is no such key or if the value is not a number. If the value is a string, - * an attempt will be made to evaluate it as a number. - * - * @param key - * A key string. - * @param defaultValue - * The default. - * @return An object which is the value. - */ - public int optInt(String key, int defaultValue) { - try { - return getInt(key); - } catch (Exception e) { - return defaultValue; - } - } - - /** - * Get an optional JSONArray associated with a key. It returns null if there - * is no such key, or if its value is not a JSONArray. - * - * @param key - * A key string. - * @return A JSONArray which is the value. - */ - public JSONArray optJSONArray(String key) { - Object o = opt(key); - return o instanceof JSONArray ? (JSONArray) o : null; - } - - /** - * Get an optional JSONObject associated with a key. It returns null if - * there is no such key, or if its value is not a JSONObject. - * - * @param key - * A key string. - * @return A JSONObject which is the value. - */ - public JSONObject optJSONObject(String key) { - Object object = opt(key); - return object instanceof JSONObject ? (JSONObject) object : null; - } - - /** - * Get an optional long value associated with a key, or zero if there is no - * such key or if the value is not a number. If the value is a string, an - * attempt will be made to evaluate it as a number. - * - * @param key - * A key string. - * @return An object which is the value. - */ - public long optLong(String key) { - return optLong(key, 0); - } - - /** - * Get an optional long value associated with a key, or the default if there - * is no such key or if the value is not a number. If the value is a string, - * an attempt will be made to evaluate it as a number. - * - * @param key - * A key string. - * @param defaultValue - * The default. - * @return An object which is the value. - */ - public long optLong(String key, long defaultValue) { - try { - return getLong(key); - } catch (Exception e) { - return defaultValue; - } - } - - /** - * Get an optional string associated with a key. It returns an empty string - * if there is no such key. If the value is not a string and is not null, - * then it is converted to a string. - * - * @param key - * A key string. - * @return A string which is the value. - */ - public String optString(String key) { - return optString(key, ""); - } - - /** - * Get an optional string associated with a key. It returns the defaultValue - * if there is no such key. - * - * @param key - * A key string. - * @param defaultValue - * The default. - * @return A string which is the value. - */ - public String optString(String key, String defaultValue) { - Object object = opt(key); - return NULL.equals(object) ? defaultValue : object.toString(); - } - - private void populateMap(Object bean) { - Class klass = bean.getClass(); - - // If klass is a System class then set includeSuperClass to false. - - boolean includeSuperClass = klass.getClassLoader() != null; - - Method[] methods = (includeSuperClass) ? klass.getMethods() : klass - .getDeclaredMethods(); - for (int i = 0; i < methods.length; i += 1) { - try { - Method method = methods[i]; - if (Modifier.isPublic(method.getModifiers())) { - String name = method.getName(); - String key = ""; - 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); - if (result != null) { - map.put(key, wrap(result)); - } - } - } - } catch (Exception ignore) { - } - } - } - - /** - * Put a key/boolean pair in the JSONObject. - * - * @param key - * A key string. - * @param value - * A boolean which is the value. - * @return this. - * @throws JSONException - * If the key is null. - */ - public JSONObject put(String key, boolean value) throws JSONException { - put(key, value ? Boolean.TRUE : Boolean.FALSE); - return this; - } - - /** - * Put a key/value pair in the JSONObject, where the value will be a - * JSONArray which is produced from a Collection. - * - * @param key - * A key string. - * @param value - * A Collection value. - * @return this. - * @throws JSONException - */ - public JSONObject put(String key, Collection value) throws JSONException { - put(key, new JSONArray(value)); - return this; - } - - /** - * Put a key/double pair in the JSONObject. - * - * @param key - * A key string. - * @param value - * A double which is the value. - * @return this. - * @throws JSONException - * If the key is null or if the number is invalid. - */ - public JSONObject put(String key, double value) throws JSONException { - put(key, new Double(value)); - return this; - } - - /** - * Put a key/int pair in the JSONObject. - * - * @param key - * A key string. - * @param value - * An int which is the value. - * @return this. - * @throws JSONException - * If the key is null. - */ - public JSONObject put(String key, int value) throws JSONException { - put(key, 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); - 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 </, producing <\/, - * allowing JSON text to be delivered in HTML. In JSON text, a string cannot - * contain a control character or an unescaped quote or backslash. - * - * @param string - * A String - * @return A String correctly formatted for insertion in a JSON text. - */ - public static String quote(String string) { - if (string == null || string.length() == 0) { - return "\"\""; - } - - char b; - char c = 0; - String hhhh; - int i; - int len = string.length(); - StringBuffer sb = new StringBuffer(len + 4); - - sb.append('"'); - for (i = 0; i < len; i += 1) { - b = c; - c = string.charAt(i); - switch (c) { - case '\\': - case '"': - sb.append('\\'); - sb.append(c); - break; - case '/': - if (b == '<') { - sb.append('\\'); - } - sb.append(c); - break; - case '\b': - sb.append("\\b"); - break; - case '\t': - sb.append("\\t"); - break; - case '\n': - sb.append("\\n"); - break; - case '\f': - sb.append("\\f"); - break; - case '\r': - sb.append("\\r"); - break; - default: - if (c < ' ' || (c >= '\u0080' && c < '\u00a0') - || (c >= '\u2000' && c < '\u2100')) { - hhhh = "000" + Integer.toHexString(c); - sb.append("\\u" + hhhh.substring(hhhh.length() - 4)); - } else { - sb.append(c); - } - } - } - sb.append('"'); - return sb.toString(); - } - - /** - * Remove a name and its value, if present. - * - * @param key - * The name to be removed. - * @return The value that was associated with the name, or null if there was - * no value. - */ - public Object remove(String key) { - return map.remove(key); - } - - /** - * Try to convert a string into a number, boolean, or null. If the string - * can't be converted, return the string. - * - * @param string - * A String. - * @return A simple JSON value. - */ - public static Object stringToValue(String string) { - Double d; - if (string.equals("")) { - return string; - } - if (string.equalsIgnoreCase("true")) { - return Boolean.TRUE; - } - if (string.equalsIgnoreCase("false")) { - return Boolean.FALSE; - } - if (string.equalsIgnoreCase("null")) { - return JSONObject.NULL; - } - - /* - * If it might be a number, try converting it. We support the - * non-standard 0x- convention. If a number cannot be produced, then the - * value will just be a string. Note that the 0x-, plus, and implied - * string conventions are non-standard. A JSON parser may accept - * non-JSON forms as long as it accepts all correct JSON forms. - */ - - char b = string.charAt(0); - if ((b >= '0' && b <= '9') || b == '.' || b == '-' || b == '+') { - if (b == '0' && string.length() > 2 - && (string.charAt(1) == 'x' || string.charAt(1) == 'X')) { - try { - return new Integer( - Integer.parseInt(string.substring(2), 16)); - } catch (Exception ignore) { - } - } - try { - if (string.indexOf('.') > -1 || string.indexOf('e') > -1 - || string.indexOf('E') > -1) { - d = Double.valueOf(string); - if (!d.isInfinite() && !d.isNaN()) { - return d; - } - } else { - Long myLong = new Long(string); - if (myLong.longValue() == myLong.intValue()) { - return new Integer(myLong.intValue()); - } else { - return myLong; - } - } - } catch (Exception ignore) { - } - } - return string; - } - - /** - * Throw an exception if the object is a NaN or infinite number. - * - * @param o - * The object to test. - * @throws JSONException - * If o is a non-finite number. - */ - public static void testValidity(Object o) throws JSONException { - if (o != null) { - if (o instanceof Double) { - if (((Double) o).isInfinite() || ((Double) o).isNaN()) { - throw new JSONException( - "JSON does not allow non-finite numbers."); - } - } else if (o instanceof Float) { - if (((Float) o).isInfinite() || ((Float) o).isNaN()) { - throw new JSONException( - "JSON does not allow non-finite numbers."); - } - } - } - } - - /** - * Produce a JSONArray containing the values of the members of this - * JSONObject. - * - * @param names - * A JSONArray containing a list of key strings. This determines - * the sequence of the values in the result. - * @return A JSONArray of values. - * @throws JSONException - * If any of the values are non-finite numbers. - */ - public JSONArray toJSONArray(JSONArray names) throws JSONException { - if (names == null || names.length() == 0) { - return null; - } - JSONArray ja = new JSONArray(); - for (int i = 0; i < names.length(); i += 1) { - ja.put(opt(names.getString(i))); - } - return ja; - } - - /** - * Make a JSON text of this JSONObject. For compactness, no whitespace is - * added. If this would not result in a syntactically correct JSON text, - * then null will be returned instead. - * <p> - * Warning: This method assumes that the data structure is acyclical. - * - * @return a printable, displayable, portable, transmittable representation - * of the object, beginning with <code>{</code> <small>(left - * brace)</small> and ending with <code>}</code> <small>(right - * brace)</small>. - */ - @Override - public String toString() { - try { - Iterator keys = keys(); - StringBuffer sb = new StringBuffer("{"); - - while (keys.hasNext()) { - if (sb.length() > 1) { - sb.append(','); - } - Object o = keys.next(); - sb.append(quote(o.toString())); - sb.append(':'); - sb.append(valueToString(map.get(o))); - } - sb.append('}'); - return sb.toString(); - } catch (Exception e) { - return null; - } - } - - /** - * Make a prettyprinted JSON text of this JSONObject. - * <p> - * Warning: This method assumes that the data structure is acyclical. - * - * @param indentFactor - * The number of spaces to add to each level of indentation. - * @return a printable, displayable, portable, transmittable representation - * of the object, beginning with <code>{</code> <small>(left - * brace)</small> and ending with <code>}</code> <small>(right - * brace)</small>. - * @throws JSONException - * If the object contains an invalid number. - */ - public String toString(int indentFactor) throws JSONException { - return toString(indentFactor, 0); - } - - /** - * Make a prettyprinted JSON text of this JSONObject. - * <p> - * Warning: This method assumes that the data structure is acyclical. - * - * @param indentFactor - * The number of spaces to add to each level of indentation. - * @param indent - * The indentation of the top level. - * @return a printable, displayable, transmittable representation of the - * object, beginning with <code>{</code> <small>(left - * brace)</small> and ending with <code>}</code> <small>(right - * brace)</small>. - * @throws JSONException - * If the object contains an invalid number. - */ - String toString(int indentFactor, int indent) throws JSONException { - int i; - int length = length(); - if (length == 0) { - return "{}"; - } - Iterator keys = keys(); - int newindent = indent + indentFactor; - Object object; - StringBuffer sb = new StringBuffer("{"); - if (length == 1) { - object = keys.next(); - sb.append(quote(object.toString())); - sb.append(": "); - sb.append(valueToString(map.get(object), indentFactor, indent)); - } else { - while (keys.hasNext()) { - object = keys.next(); - if (sb.length() > 1) { - sb.append(",\n"); - } else { - sb.append('\n'); - } - for (i = 0; i < newindent; i += 1) { - sb.append(' '); - } - sb.append(quote(object.toString())); - sb.append(": "); - sb.append(valueToString(map.get(object), indentFactor, - newindent)); - } - if (sb.length() > 1) { - sb.append('\n'); - for (i = 0; i < indent; i += 1) { - sb.append(' '); - } - } - } - sb.append('}'); - return sb.toString(); - } - - /** - * Make a JSON text of an Object value. If the object has an - * value.toJSONString() method, then that method will be used to produce the - * JSON text. The method is required to produce a strictly conforming text. - * If the object does not contain a toJSONString method (which is the most - * common case), then a text will be produced by other means. If the value - * is an array or Collection, then a JSONArray will be made from it and its - * toJSONString method will be called. If the value is a MAP, then a - * JSONObject will be made from it and its toJSONString method will be - * called. Otherwise, the value's toString method will be called, and the - * result will be quoted. - * - * <p> - * Warning: This method assumes that the data structure is acyclical. - * - * @param value - * The value to be serialized. - * @return a printable, displayable, transmittable representation of the - * object, beginning with <code>{</code> <small>(left - * brace)</small> and ending with <code>}</code> <small>(right - * brace)</small>. - * @throws JSONException - * If the value is or contains an invalid number. - */ - public static String valueToString(Object value) throws JSONException { - if (value == null || value.equals(null)) { - return "null"; - } - if (value instanceof JSONString) { - Object object; - try { - object = ((JSONString) value).toJSONString(); - } catch (Exception e) { - throw new JSONException(e); - } - if (object instanceof String) { - return (String) object; - } - throw new JSONException("Bad value from toJSONString: " + object); - } - if (value instanceof Number) { - return numberToString((Number) value); - } - if (value instanceof Boolean || value instanceof JSONObject - || value instanceof JSONArray) { - return value.toString(); - } - if (value instanceof Map) { - return new JSONObject((Map) value).toString(); - } - if (value instanceof Collection) { - return new JSONArray((Collection) value).toString(); - } - if (value.getClass().isArray()) { - return new JSONArray(value).toString(); - } - return quote(value.toString()); - } - - /** - * Make a prettyprinted JSON text of an object value. - * <p> - * Warning: This method assumes that the data structure is acyclical. - * - * @param value - * The value to be serialized. - * @param indentFactor - * The number of spaces to add to each level of indentation. - * @param indent - * The indentation of the top level. - * @return a printable, displayable, transmittable representation of the - * object, beginning with <code>{</code> <small>(left - * brace)</small> and ending with <code>}</code> <small>(right - * brace)</small>. - * @throws JSONException - * If the object contains an invalid number. - */ - static String valueToString(Object value, int indentFactor, int indent) - throws JSONException { - if (value == null || value.equals(null)) { - return "null"; - } - try { - if (value instanceof JSONString) { - Object o = ((JSONString) value).toJSONString(); - if (o instanceof String) { - return (String) o; - } - } - } catch (Exception ignore) { - } - if (value instanceof Number) { - return numberToString((Number) value); - } - if (value instanceof Boolean) { - return value.toString(); - } - if (value instanceof JSONObject) { - return ((JSONObject) value).toString(indentFactor, indent); - } - if (value instanceof JSONArray) { - return ((JSONArray) value).toString(indentFactor, indent); - } - if (value instanceof Map) { - return new JSONObject((Map) value).toString(indentFactor, indent); - } - if (value instanceof Collection) { - return new JSONArray((Collection) value).toString(indentFactor, - indent); - } - if (value.getClass().isArray()) { - return new JSONArray(value).toString(indentFactor, indent); - } - return quote(value.toString()); - } - - /** - * Wrap an object, if necessary. If the object is null, return the NULL - * object. If it is an array or collection, wrap it in a JSONArray. If it is - * a map, wrap it in a JSONObject. If it is a standard property (Double, - * String, et al) then it is already wrapped. Otherwise, if it comes from - * one of the java packages, turn it into a string. And if it doesn't, try - * to wrap it in a JSONObject. If the wrapping fails, then null is returned. - * - * @param object - * The object to wrap - * @return The wrapped value - */ - public static Object wrap(Object object) { - try { - if (object == null) { - return NULL; - } - if (object instanceof JSONObject || object instanceof JSONArray - || NULL.equals(object) || object instanceof JSONString - || object instanceof Byte || object instanceof Character - || object instanceof Short || object instanceof Integer - || object instanceof Long || object instanceof Boolean - || object instanceof Float || object instanceof Double - || object instanceof String) { - return object; - } - - if (object instanceof Collection) { - return new JSONArray((Collection) object); - } - if (object.getClass().isArray()) { - return new JSONArray(object); - } - if (object instanceof Map) { - return new JSONObject((Map) object); - } - Package objectPackage = object.getClass().getPackage(); - String objectPackageName = objectPackage != null ? objectPackage - .getName() : ""; - if (objectPackageName.startsWith("java.") - || objectPackageName.startsWith("javax.") - || object.getClass().getClassLoader() == null) { - return object.toString(); - } - return new JSONObject(object); - } catch (Exception exception) { - return null; - } - } - - /** - * Write the contents of the JSONObject as JSON text to a writer. For - * compactness, no whitespace is added. - * <p> - * Warning: This method assumes that the data structure is acyclical. - * - * @return The writer. - * @throws JSONException - */ - public Writer write(Writer writer) throws JSONException { - try { - boolean commanate = false; - Iterator keys = keys(); - writer.write('{'); - - while (keys.hasNext()) { - if (commanate) { - writer.write(','); - } - Object key = keys.next(); - writer.write(quote(key.toString())); - writer.write(':'); - Object value = map.get(key); - if (value instanceof JSONObject) { - ((JSONObject) value).write(writer); - } else if (value instanceof JSONArray) { - ((JSONArray) value).write(writer); - } else { - writer.write(valueToString(value)); - } - commanate = true; - } - writer.write('}'); - return writer; - } catch (IOException exception) { - throw new JSONException(exception); - } - } -}
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