org.json.JSONObject Maven / Gradle / Ivy
package org.json;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import com.alibaba.fastjson.JSON;
@SuppressWarnings({ "rawtypes", "serial","unchecked" })
public class JSONObject extends HashMap{
public JSONObject() {
super();
}
public JSONObject(String jsonStr) throws JSONException{
super( JSON.parseObject(jsonStr));
}
public JSONObject(Map m) {
super(m);
}
public int length() {
return this.size();
}
public static String[] getNames(JSONObject json) {
String[] r = new String[json.size()];
json.keySet().toArray(r);
return r;
}
public Object opt(String e) {
return this.get(e);
}
@Override
public String toString() {
return JSON.toJSONString(this);
}
public JSONObject put(String key, Object value) throws JSONException {
super.put(key, value);
return this;
}
/**
* 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/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 If o is a non-finite number.
*/
public JSONObject put(String key, Map value) throws JSONException {
put(key, new JSONObject(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 o = opt(key);
if (o == null) {
put(key, new JSONArray().put(value));
} else if (o instanceof JSONArray) {
put(key, ((JSONArray)o).put(value));
} else {
throw new JSONException("JSONObject[" + key +
"] is not a JSONArray.");
}
return this;
}
/**
* 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 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;
}
/**
* 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.
*
*
* 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 { (left brace) and ending
* with } (right brace).
* @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 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(Arrays.asList(value)).toString();
}
if (value.getClass().isArray()) {
return new JSONArray(Arrays.asList(value)).toString();
}
return quote(value.toString());
}
/**
* 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();
}
}