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JSONValue | 23 | 120 | 50 |
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.StringWriter; | |
11 | import java.io.Writer; | |
12 | import java.util.Collection; | |
13 | import java.util.Locale; | |
14 | // import java.util.List; | |
15 | import java.util.Map; | |
16 | ||
17 | import org.json.simple.parser.JSONParser; | |
18 | import org.json.simple.parser.ParseException; | |
19 | ||
20 | /** | |
21 | * @author FangYidong<fangyidong@yahoo.com.cn> | |
22 | */ | |
23 | public class JSONValue | |
24 | { | |
25 | /** | |
26 | * Parse JSON text into java object from the input source. Please use | |
27 | * parseWithException() if you don't want to ignore the exception. | |
28 | * | |
29 | * @see org.json.simple.parser.JSONParser#parse(Reader) | |
30 | * @see #parseWithException(Reader) | |
31 | * | |
32 | * @param in | |
33 | * @return Instance of the following: org.json.simple.JSONObject, | |
34 | * org.json.simple.JSONArray, java.lang.String, java.lang.Number, | |
35 | * java.lang.Boolean, null | |
36 | * | |
37 | * @deprecated this method may throw an {@code Error} instead of returning | |
38 | * {@code null}; please use | |
39 | * {@link JSONValue#parseWithException(Reader)} instead | |
40 | */ | |
41 | 0 | @Deprecated |
42 | public static Object parse(Reader in) | |
43 | { | |
44 | 0 | try |
45 | { | |
46 | 0 | JSONParser parser = new JSONParser(); |
47 | 0 | return parser.parse(in); |
48 | } catch (Exception e) | |
49 | { | |
50 | 0 | return null; |
51 | } | |
52 | } | |
53 | ||
54 | /** | |
55 | * Parse JSON text into java object from the given string. Please use | |
56 | * parseWithException() if you don't want to ignore the exception. | |
57 | * | |
58 | * @see org.json.simple.parser.JSONParser#parse(Reader) | |
59 | * @see #parseWithException(Reader) | |
60 | * | |
61 | * @param s | |
62 | * @return Instance of the following: org.json.simple.JSONObject, | |
63 | * org.json.simple.JSONArray, java.lang.String, java.lang.Number, | |
64 | * java.lang.Boolean, null | |
65 | * | |
66 | * @deprecated this method may throw an {@code Error} instead of returning | |
67 | * {@code null}; please use | |
68 | * {@link JSONValue#parseWithException(String)} instead | |
69 | */ | |
70 | 0 | @Deprecated |
71 | public static Object parse(String s) | |
72 | { | |
73 | 0 | StringReader in = new StringReader(s); |
74 | 0 | return parse(in); |
75 | } | |
76 | ||
77 | /** | |
78 | * Parse JSON text into java object from the input source. | |
79 | * | |
80 | * @see org.json.simple.parser.JSONParser | |
81 | * | |
82 | * @param in | |
83 | * @return Instance of the following: org.json.simple.JSONObject, | |
84 | * org.json.simple.JSONArray, java.lang.String, java.lang.Number, | |
85 | * java.lang.Boolean, null | |
86 | * | |
87 | * @throws IOException | |
88 | * @throws ParseException | |
89 | */ | |
90 | 0 | public static Object parseWithException(Reader in) |
91 | throws IOException, ParseException | |
92 | { | |
93 | 0 | JSONParser parser = new JSONParser(); |
94 | 0 | return parser.parse(in); |
95 | } | |
96 | ||
97 | 0 | public static Object parseWithException(String s) throws ParseException |
98 | { | |
99 | 0 | JSONParser parser = new JSONParser(); |
100 | 0 | return parser.parse(s); |
101 | } | |
102 | ||
103 | /** | |
104 | * Encode an object into JSON text and write it to out. | |
105 | * <p> | |
106 | * If this object is a Map or a List, and it's also a JSONStreamAware or a | |
107 | * JSONAware, JSONStreamAware or JSONAware will be considered firstly. | |
108 | * <p> | |
109 | * DO NOT call this method from writeJSONString(Writer) of a class that | |
110 | * implements both JSONStreamAware and (Map or List) with "this" as the first | |
111 | * parameter, use JSONObject.writeJSONString(Map, Writer) or | |
112 | * JSONArray.writeJSONString(List, Writer) instead. | |
113 | * | |
114 | * @see org.json.simple.JSONObject#writeJSONString(Map, Writer) | |
115 | * @see org.json.simple.JSONArray#writeJSONString(List, Writer) | |
116 | * | |
117 | * @param value | |
118 | * @param writer | |
119 | */ | |
120 | 8288 | public static void writeJSONString(Object value, Writer out) |
121 | throws IOException | |
122 | { | |
123 | 8288 | if (value == null) |
124 | { | |
125 | 0 | out.write("null"); |
126 | 0 | return; |
127 | } | |
128 | ||
129 | 8288 | if (value instanceof String) |
130 | { | |
131 | 8288 | out.write('\"'); |
132 | 8288 | out.write(escape((String) value)); |
133 | 8288 | out.write('\"'); |
134 | 8288 | return; |
135 | } | |
136 | ||
137 | 0 | if (value instanceof Double) |
138 | { | |
139 | 0 | if (((Double) value).isInfinite() || ((Double) value).isNaN()) |
140 | 0 | out.write("null"); |
141 | else | |
142 | 0 | out.write(value.toString()); |
143 | 0 | return; |
144 | } | |
145 | ||
146 | 0 | if (value instanceof Float) |
147 | { | |
148 | 0 | if (((Float) value).isInfinite() || ((Float) value).isNaN()) |
149 | 0 | out.write("null"); |
150 | else | |
151 | 0 | out.write(value.toString()); |
152 | 0 | return; |
153 | } | |
154 | ||
155 | 0 | if (value instanceof Number) |
156 | { | |
157 | 0 | out.write(value.toString()); |
158 | 0 | return; |
159 | } | |
160 | ||
161 | 0 | if (value instanceof Boolean) |
162 | { | |
163 | 0 | out.write(value.toString()); |
164 | 0 | return; |
165 | } | |
166 | ||
167 | 0 | if ((value instanceof JSONStreamAware)) |
168 | { | |
169 | 0 | ((JSONStreamAware) value).writeJSONString(out); |
170 | 0 | return; |
171 | } | |
172 | ||
173 | 0 | if ((value instanceof JSONAware)) |
174 | { | |
175 | 0 | out.write(((JSONAware) value).toJSONString()); |
176 | 0 | return; |
177 | } | |
178 | ||
179 | 0 | if (value instanceof Map) |
180 | { | |
181 | 0 | JSONObject.writeJSONString((Map) value, out); |
182 | 0 | return; |
183 | } | |
184 | ||
185 | 0 | if (value instanceof Collection) |
186 | { | |
187 | 0 | JSONArray.writeJSONString((Collection) value, out); |
188 | 0 | return; |
189 | } | |
190 | ||
191 | 0 | if (value instanceof byte[]) |
192 | { | |
193 | 0 | JSONArray.writeJSONString((byte[]) value, out); |
194 | 0 | return; |
195 | } | |
196 | ||
197 | 0 | if (value instanceof short[]) |
198 | { | |
199 | 0 | JSONArray.writeJSONString((short[]) value, out); |
200 | 0 | return; |
201 | } | |
202 | ||
203 | 0 | if (value instanceof int[]) |
204 | { | |
205 | 0 | JSONArray.writeJSONString((int[]) value, out); |
206 | 0 | return; |
207 | } | |
208 | ||
209 | 0 | if (value instanceof long[]) |
210 | { | |
211 | 0 | JSONArray.writeJSONString((long[]) value, out); |
212 | 0 | return; |
213 | } | |
214 | ||
215 | 0 | if (value instanceof float[]) |
216 | { | |
217 | 0 | JSONArray.writeJSONString((float[]) value, out); |
218 | 0 | return; |
219 | } | |
220 | ||
221 | 0 | if (value instanceof double[]) |
222 | { | |
223 | 0 | JSONArray.writeJSONString((double[]) value, out); |
224 | 0 | return; |
225 | } | |
226 | ||
227 | 0 | if (value instanceof boolean[]) |
228 | { | |
229 | 0 | JSONArray.writeJSONString((boolean[]) value, out); |
230 | 0 | return; |
231 | } | |
232 | ||
233 | 0 | if (value instanceof char[]) |
234 | { | |
235 | 0 | JSONArray.writeJSONString((char[]) value, out); |
236 | 0 | return; |
237 | } | |
238 | ||
239 | 0 | if (value instanceof Object[]) |
240 | { | |
241 | 0 | JSONArray.writeJSONString((Object[]) value, out); |
242 | 0 | return; |
243 | } | |
244 | ||
245 | 0 | out.write(value.toString()); |
246 | } | |
247 | ||
248 | /** | |
249 | * Convert an object to JSON text. | |
250 | * <p> | |
251 | * If this object is a Map or a List, and it's also a JSONAware, JSONAware | |
252 | * will be considered firstly. | |
253 | * <p> | |
254 | * DO NOT call this method from toJSONString() of a class that implements both | |
255 | * JSONAware and Map or List with "this" as the parameter, use | |
256 | * JSONObject.toJSONString(Map) or JSONArray.toJSONString(List) instead. | |
257 | * | |
258 | * @see org.json.simple.JSONObject#toJSONString(Map) | |
259 | * @see org.json.simple.JSONArray#toJSONString(List) | |
260 | * | |
261 | * @param value | |
262 | * @return JSON text, or "null" if value is null or it's an NaN or an INF | |
263 | * number. | |
264 | */ | |
265 | 0 | public static String toJSONString(Object value) |
266 | { | |
267 | 0 | final StringWriter writer = new StringWriter(); |
268 | ||
269 | 0 | try |
270 | { | |
271 | 0 | writeJSONString(value, writer); |
272 | 0 | return writer.toString(); |
273 | } catch (IOException e) | |
274 | { | |
275 | // This should never happen for a StringWriter | |
276 | 0 | throw new RuntimeException(e); |
277 | } | |
278 | } | |
279 | ||
280 | /** | |
281 | * Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters | |
282 | * (U+0000 through U+001F). | |
283 | * | |
284 | * @param s | |
285 | * @return | |
286 | */ | |
287 | 8288 | public static String escape(String s) |
288 | { | |
289 | 8288 | if (s == null) |
290 | 0 | return null; |
291 | 8288 | StringBuffer sb = new StringBuffer(); |
292 | 8288 | escape(s, sb); |
293 | 8288 | return sb.toString(); |
294 | } | |
295 | ||
296 | /** | |
297 | * @param s | |
298 | * - Must not be null. | |
299 | * @param sb | |
300 | */ | |
301 | 8288 | static void escape(String s, StringBuffer sb) |
302 | { | |
303 | 8288 | final int len = s.length(); |
304 | 150664 | for (int i = 0; i < len; i++) |
305 | { | |
306 | 142376 | char ch = s.charAt(i); |
307 | 142376 | switch (ch) |
308 | { | |
309 | 0 | case '"': |
310 | 0 | sb.append("\\\""); |
311 | 0 | break; |
312 | 0 | case '\\': |
313 | 0 | sb.append("\\\\"); |
314 | 0 | break; |
315 | 0 | case '\b': |
316 | 0 | sb.append("\\b"); |
317 | 0 | break; |
318 | 0 | case '\f': |
319 | 0 | sb.append("\\f"); |
320 | 0 | break; |
321 | 0 | case '\n': |
322 | 0 | sb.append("\\n"); |
323 | 0 | break; |
324 | 0 | case '\r': |
325 | 0 | sb.append("\\r"); |
326 | 0 | break; |
327 | 0 | case '\t': |
328 | 0 | sb.append("\\t"); |
329 | 0 | break; |
330 | 0 | case '/': |
331 | 0 | sb.append("\\/"); |
332 | 0 | break; |
333 | 142376 | default: |
334 | // Reference: http://www.unicode.org/versions/Unicode5.1.0/ | |
335 | 142376 | if ((ch >= '\u0000' && ch <= '\u001F') |
336 | || (ch >= '\u007F' && ch <= '\u009F') | |
337 | || (ch >= '\u2000' && ch <= '\u20FF')) | |
338 | { | |
339 | 0 | String ss = Integer.toHexString(ch); |
340 | 0 | sb.append("\\u"); |
341 | 0 | for (int k = 0; k < 4 - ss.length(); k++) |
342 | { | |
343 | 0 | sb.append('0'); |
344 | } | |
345 | 0 | sb.append(ss.toUpperCase(Locale.ROOT)); |
346 | } | |
347 | else | |
348 | { | |
349 | 142376 | sb.append(ch); |
350 | } | |
351 | } | |
352 | } // for | |
353 | } | |
354 | ||
355 | } |