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comparison: mobile/android/thirdparty/org/json/simple/JSONValue.java

mobile/android/thirdparty/org/json/simple/JSONValue.java

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TOR_BUG_3246
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-1:000000000000 0:37cbe0cb98b5
1 /*
2 * $Id: JSONValue.java,v 1.1 2006/04/15 14:37:04 platform Exp $
3 * Created on 2006-4-15
4 */
5 package org.json.simple;
6
7 import java.io.IOException;
8 import java.io.Reader;
9 import java.io.StringReader;
10 import java.io.Writer;
11 import java.util.List;
12 import java.util.Map;
13
14 import org.json.simple.parser.JSONParser;
15 import org.json.simple.parser.ParseException;
16
17
18 /**
19 * @author FangYidong<fangyidong@yahoo.com.cn>
20 */
21 public class JSONValue {
22 /**
23 * Parse JSON text into java object from the input source.
24 * Please use parseWithException() if you don't want to ignore the exception.
25 *
26 * @see org.json.simple.parser.JSONParser#parse(Reader)
27 * @see #parseWithException(Reader)
28 *
29 * @param in
30 * @return Instance of the following:
31 * org.json.simple.JSONObject,
32 * org.json.simple.JSONArray,
33 * java.lang.String,
34 * java.lang.Number,
35 * java.lang.Boolean,
36 * null
37 *
38 */
39 public static Object parse(Reader in){
40 try{
41 JSONParser parser=new JSONParser();
42 return parser.parse(in);
43 }
44 catch(Exception e){
45 return null;
46 }
47 }
48
49 public static Object parse(String s){
50 StringReader in=new StringReader(s);
51 return parse(in);
52 }
53
54 /**
55 * Parse JSON text into java object from the input source.
56 *
57 * @see org.json.simple.parser.JSONParser
58 *
59 * @param in
60 * @return Instance of the following:
61 * org.json.simple.JSONObject,
62 * org.json.simple.JSONArray,
63 * java.lang.String,
64 * java.lang.Number,
65 * java.lang.Boolean,
66 * null
67 *
68 * @throws IOException
69 * @throws ParseException
70 */
71 public static Object parseWithException(Reader in) throws IOException, ParseException{
72 JSONParser parser=new JSONParser();
73 return parser.parse(in);
74 }
75
76 public static Object parseWithException(String s) throws ParseException{
77 JSONParser parser=new JSONParser();
78 return parser.parse(s);
79 }
80
81 /**
82 * Encode an object into JSON text and write it to out.
83 * <p>
84 * If this object is a Map or a List, and it's also a JSONStreamAware or a JSONAware, JSONStreamAware or JSONAware will be considered firstly.
85 * <p>
86 * DO NOT call this method from writeJSONString(Writer) of a class that implements both JSONStreamAware and (Map or List) with
87 * "this" as the first parameter, use JSONObject.writeJSONString(Map, Writer) or JSONArray.writeJSONString(List, Writer) instead.
88 *
89 * @see org.json.simple.JSONObject#writeJSONString(Map, Writer)
90 * @see org.json.simple.JSONArray#writeJSONString(List, Writer)
91 *
92 * @param value
93 * @param writer
94 */
95 public static void writeJSONString(Object value, Writer out) throws IOException {
96 if(value == null){
97 out.write("null");
98 return;
99 }
100
101 if(value instanceof String){
102 out.write('\"');
103 out.write(escape((String)value));
104 out.write('\"');
105 return;
106 }
107
108 if(value instanceof Double){
109 if(((Double)value).isInfinite() || ((Double)value).isNaN())
110 out.write("null");
111 else
112 out.write(value.toString());
113 return;
114 }
115
116 if(value instanceof Float){
117 if(((Float)value).isInfinite() || ((Float)value).isNaN())
118 out.write("null");
119 else
120 out.write(value.toString());
121 return;
122 }
123
124 if(value instanceof Number){
125 out.write(value.toString());
126 return;
127 }
128
129 if(value instanceof Boolean){
130 out.write(value.toString());
131 return;
132 }
133
134 if((value instanceof JSONStreamAware)){
135 ((JSONStreamAware)value).writeJSONString(out);
136 return;
137 }
138
139 if((value instanceof JSONAware)){
140 out.write(((JSONAware)value).toJSONString());
141 return;
142 }
143
144 if(value instanceof Map){
145 JSONObject.writeJSONString((Map)value, out);
146 return;
147 }
148
149 if(value instanceof List){
150 JSONArray.writeJSONString((List)value, out);
151 return;
152 }
153
154 out.write(value.toString());
155 }
156
157 /**
158 * Convert an object to JSON text.
159 * <p>
160 * If this object is a Map or a List, and it's also a JSONAware, JSONAware will be considered firstly.
161 * <p>
162 * DO NOT call this method from toJSONString() of a class that implements both JSONAware and Map or List with
163 * "this" as the parameter, use JSONObject.toJSONString(Map) or JSONArray.toJSONString(List) instead.
164 *
165 * @see org.json.simple.JSONObject#toJSONString(Map)
166 * @see org.json.simple.JSONArray#toJSONString(List)
167 *
168 * @param value
169 * @return JSON text, or "null" if value is null or it's an NaN or an INF number.
170 */
171 public static String toJSONString(Object value){
172 if(value == null)
173 return "null";
174
175 if(value instanceof String)
176 return "\""+escape((String)value)+"\"";
177
178 if(value instanceof Double){
179 if(((Double)value).isInfinite() || ((Double)value).isNaN())
180 return "null";
181 else
182 return value.toString();
183 }
184
185 if(value instanceof Float){
186 if(((Float)value).isInfinite() || ((Float)value).isNaN())
187 return "null";
188 else
189 return value.toString();
190 }
191
192 if(value instanceof Number)
193 return value.toString();
194
195 if(value instanceof Boolean)
196 return value.toString();
197
198 if((value instanceof JSONAware))
199 return ((JSONAware)value).toJSONString();
200
201 if(value instanceof Map)
202 return JSONObject.toJSONString((Map)value);
203
204 if(value instanceof List)
205 return JSONArray.toJSONString((List)value);
206
207 return value.toString();
208 }
209
210 /**
211 * Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters (U+0000 through U+001F).
212 * @param s
213 * @return
214 */
215 public static String escape(String s){
216 if(s==null)
217 return null;
218 StringBuffer sb = new StringBuffer();
219 escape(s, sb);
220 return sb.toString();
221 }
222
223 /**
224 * @param s - Must not be null.
225 * @param sb
226 */
227 static void escape(String s, StringBuffer sb) {
228 for(int i=0;i<s.length();i++){
229 char ch=s.charAt(i);
230 switch(ch){
231 case '"':
232 sb.append("\\\"");
233 break;
234 case '\\':
235 sb.append("\\\\");
236 break;
237 case '\b':
238 sb.append("\\b");
239 break;
240 case '\f':
241 sb.append("\\f");
242 break;
243 case '\n':
244 sb.append("\\n");
245 break;
246 case '\r':
247 sb.append("\\r");
248 break;
249 case '\t':
250 sb.append("\\t");
251 break;
252 case '/':
253 sb.append("\\/");
254 break;
255 default:
256 //Reference: http://www.unicode.org/versions/Unicode5.1.0/
257 if((ch>='\u0000' && ch<='\u001F') || (ch>='\u007F' && ch<='\u009F') || (ch>='\u2000' && ch<='\u20FF')){
258 String ss=Integer.toHexString(ch);
259 sb.append("\\u");
260 for(int k=0;k<4-ss.length();k++){
261 sb.append('0');
262 }
263 sb.append(ss.toUpperCase());
264 }
265 else{
266 sb.append(ch);
267 }
268 }
269 }//for
270 }
271
272 }

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