Commit | Line | Data |
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db31c358 NR |
1 | package be.nikiroo.utils.serial; |
2 | ||
08f80ac5 | 3 | import java.io.ByteArrayInputStream; |
e570f7eb | 4 | import java.io.IOException; |
08f80ac5 | 5 | import java.io.InputStream; |
db31c358 | 6 | import java.io.NotSerializableException; |
08f80ac5 NR |
7 | import java.io.OutputStream; |
8 | import java.io.UnsupportedEncodingException; | |
ce0974c4 | 9 | import java.lang.reflect.Array; |
8c8da42a | 10 | import java.lang.reflect.Constructor; |
db31c358 | 11 | import java.lang.reflect.Field; |
e570f7eb | 12 | import java.lang.reflect.Modifier; |
f4053377 | 13 | import java.net.URL; |
72648e75 | 14 | import java.util.ArrayList; |
db31c358 | 15 | import java.util.HashMap; |
72648e75 | 16 | import java.util.List; |
db31c358 | 17 | import java.util.Map; |
ce0974c4 | 18 | import java.util.UnknownFormatConversionException; |
db31c358 | 19 | |
08f80ac5 | 20 | import be.nikiroo.utils.IOUtils; |
80500544 | 21 | import be.nikiroo.utils.Image; |
08f80ac5 NR |
22 | import be.nikiroo.utils.StringUtils; |
23 | import be.nikiroo.utils.streams.NextableInputStream; | |
24 | import be.nikiroo.utils.streams.NextableInputStreamStep; | |
e570f7eb | 25 | |
db31c358 | 26 | /** |
8c8da42a | 27 | * Small class to help with serialisation. |
db31c358 NR |
28 | * <p> |
29 | * Note that we do not support inner classes (but we do support nested classes) | |
30 | * and all objects require an empty constructor to be deserialised. | |
5bc55b51 NR |
31 | * <p> |
32 | * It is possible to add support to custom types (both the encoder and the | |
33 | * decoder will require the custom classes) -- see {@link CustomSerializer}. | |
34 | * <p> | |
35 | * Default supported types are: | |
36 | * <ul> | |
37 | * <li>NULL (as a null value)</li> | |
38 | * <li>String</li> | |
39 | * <li>Boolean</li> | |
40 | * <li>Byte</li> | |
41 | * <li>Character</li> | |
42 | * <li>Short</li> | |
43 | * <li>Long</li> | |
44 | * <li>Float</li> | |
45 | * <li>Double</li> | |
46 | * <li>Integer</li> | |
47 | * <li>Enum (any enum whose name and value is known by the caller)</li> | |
48 | * <li>java.awt.image.BufferedImage (as a {@link CustomSerializer})</li> | |
49 | * <li>An array of the above (as a {@link CustomSerializer})</li> | |
f4053377 | 50 | * <li>URL</li> |
5bc55b51 | 51 | * </ul> |
db31c358 NR |
52 | * |
53 | * @author niki | |
54 | */ | |
aad14586 | 55 | public class SerialUtils { |
db31c358 NR |
56 | private static Map<String, CustomSerializer> customTypes; |
57 | ||
58 | static { | |
59 | customTypes = new HashMap<String, CustomSerializer>(); | |
ce0974c4 NR |
60 | |
61 | // Array types: | |
62 | customTypes.put("[]", new CustomSerializer() { | |
63 | @Override | |
08f80ac5 NR |
64 | protected void toStream(OutputStream out, Object value) |
65 | throws IOException { | |
66 | ||
67 | // TODO: we use \n to separate, and b64 to un-\n | |
68 | // -- but we could use \\n ? | |
ce0974c4 NR |
69 | String type = value.getClass().getCanonicalName(); |
70 | type = type.substring(0, type.length() - 2); // remove the [] | |
71 | ||
08f80ac5 | 72 | write(out, type); |
ce0974c4 NR |
73 | try { |
74 | for (int i = 0; true; i++) { | |
75 | Object item = Array.get(value, i); | |
08f80ac5 | 76 | |
ce0974c4 | 77 | // encode it normally if direct value |
08f80ac5 NR |
78 | write(out, "\r"); |
79 | if (!SerialUtils.encode(out, item)) { | |
ce0974c4 | 80 | try { |
08f80ac5 NR |
81 | // TODO: bad escaping? |
82 | write(out, "B64:"); | |
83 | OutputStream bout = StringUtils.base64(out, | |
84 | false, false); | |
85 | new Exporter(bout).append(item); | |
ce0974c4 NR |
86 | } catch (NotSerializableException e) { |
87 | throw new UnknownFormatConversionException(e | |
88 | .getMessage()); | |
89 | } | |
90 | } | |
ce0974c4 NR |
91 | } |
92 | } catch (ArrayIndexOutOfBoundsException e) { | |
93 | // Done. | |
94 | } | |
ce0974c4 NR |
95 | } |
96 | ||
97 | @Override | |
08f80ac5 NR |
98 | protected Object fromStream(InputStream in) throws IOException { |
99 | NextableInputStream stream = new NextableInputStream(in, | |
100 | new NextableInputStreamStep('\r')); | |
ce0974c4 NR |
101 | |
102 | try { | |
08f80ac5 NR |
103 | List<Object> list = new ArrayList<Object>(); |
104 | stream.next(); | |
105 | String type = IOUtils.readSmallStream(stream); | |
106 | ||
107 | while (stream.next()) { | |
108 | Object value = new Importer().read(stream).getValue(); | |
109 | list.add(value); | |
110 | } | |
111 | ||
ce0974c4 | 112 | Object array = Array.newInstance( |
08f80ac5 NR |
113 | SerialUtils.getClass(type), list.size()); |
114 | for (int i = 0; i < list.size(); i++) { | |
115 | Array.set(array, i, list.get(i)); | |
ce0974c4 NR |
116 | } |
117 | ||
118 | return array; | |
119 | } catch (Exception e) { | |
452f38c8 NR |
120 | if (e instanceof IOException) { |
121 | throw (IOException) e; | |
122 | } | |
123 | throw new IOException(e.getMessage()); | |
ce0974c4 NR |
124 | } |
125 | } | |
08f80ac5 NR |
126 | |
127 | @Override | |
128 | protected String getType() { | |
129 | return "[]"; | |
130 | } | |
ce0974c4 | 131 | }); |
e570f7eb | 132 | |
f4053377 NR |
133 | // URL: |
134 | customTypes.put("java.net.URL", new CustomSerializer() { | |
135 | @Override | |
08f80ac5 NR |
136 | protected void toStream(OutputStream out, Object value) |
137 | throws IOException { | |
138 | String val = ""; | |
f4053377 | 139 | if (value != null) { |
08f80ac5 | 140 | val = ((URL) value).toString(); |
f4053377 | 141 | } |
08f80ac5 NR |
142 | |
143 | out.write(val.getBytes("UTF-8")); | |
f4053377 NR |
144 | } |
145 | ||
146 | @Override | |
08f80ac5 NR |
147 | protected Object fromStream(InputStream in) throws IOException { |
148 | String val = IOUtils.readSmallStream(in); | |
149 | if (!val.isEmpty()) { | |
150 | return new URL(val); | |
f4053377 | 151 | } |
08f80ac5 | 152 | |
f4053377 NR |
153 | return null; |
154 | } | |
155 | ||
156 | @Override | |
157 | protected String getType() { | |
158 | return "java.net.URL"; | |
159 | } | |
160 | }); | |
161 | ||
e570f7eb | 162 | // Images (this is currently the only supported image type by default) |
80500544 | 163 | customTypes.put("be.nikiroo.utils.Image", new CustomSerializer() { |
e570f7eb | 164 | @Override |
08f80ac5 NR |
165 | protected void toStream(OutputStream out, Object value) |
166 | throws IOException { | |
167 | Image img = (Image) value; | |
168 | OutputStream encoded = StringUtils.base64(out, false, false); | |
169 | try { | |
170 | InputStream in = img.newInputStream(); | |
171 | try { | |
172 | IOUtils.write(in, encoded); | |
173 | } finally { | |
174 | in.close(); | |
175 | } | |
176 | } finally { | |
177 | encoded.flush(); | |
178 | // Cannot close! | |
179 | } | |
e570f7eb NR |
180 | } |
181 | ||
182 | @Override | |
183 | protected String getType() { | |
80500544 | 184 | return "be.nikiroo.utils.Image"; |
e570f7eb NR |
185 | } |
186 | ||
187 | @Override | |
08f80ac5 | 188 | protected Object fromStream(InputStream in) throws IOException { |
e570f7eb | 189 | try { |
08f80ac5 NR |
190 | // Cannot close it! |
191 | InputStream decoded = StringUtils.unbase64(in, false); | |
192 | return new Image(decoded); | |
e570f7eb NR |
193 | } catch (IOException e) { |
194 | throw new UnknownFormatConversionException(e.getMessage()); | |
195 | } | |
196 | } | |
197 | }); | |
db31c358 | 198 | } |
8c8da42a | 199 | |
aad14586 NR |
200 | /** |
201 | * Create an empty object of the given type. | |
202 | * | |
203 | * @param type | |
204 | * the object type (its class name) | |
205 | * | |
206 | * @return the new object | |
207 | * | |
8c8da42a NR |
208 | * @throws ClassNotFoundException |
209 | * if the class cannot be found | |
210 | * @throws NoSuchMethodException | |
211 | * if the given class is not compatible with this code | |
aad14586 | 212 | */ |
8c8da42a NR |
213 | public static Object createObject(String type) |
214 | throws ClassNotFoundException, NoSuchMethodException { | |
aad14586 | 215 | |
72648e75 | 216 | String desc = null; |
aad14586 NR |
217 | try { |
218 | Class<?> clazz = getClass(type); | |
aad14586 | 219 | String className = clazz.getName(); |
72648e75 NR |
220 | List<Object> args = new ArrayList<Object>(); |
221 | List<Class<?>> classes = new ArrayList<Class<?>>(); | |
aad14586 NR |
222 | Constructor<?> ctor = null; |
223 | if (className.contains("$")) { | |
72648e75 NR |
224 | for (String parentName = className.substring(0, |
225 | className.lastIndexOf('$'));; parentName = parentName | |
949445ee | 226 | .substring(0, parentName.lastIndexOf('$'))) { |
72648e75 NR |
227 | Object parent = createObject(parentName); |
228 | args.add(parent); | |
229 | classes.add(parent.getClass()); | |
949445ee | 230 | |
72648e75 NR |
231 | if (!parentName.contains("$")) { |
232 | break; | |
233 | } | |
234 | } | |
235 | ||
236 | // Better error description in case there is no empty | |
237 | // constructor: | |
238 | desc = ""; | |
239 | String end = ""; | |
240 | for (Class<?> parent = clazz; parent != null | |
241 | && !parent.equals(Object.class); parent = parent | |
949445ee | 242 | .getSuperclass()) { |
72648e75 NR |
243 | if (!desc.isEmpty()) { |
244 | desc += " [:"; | |
245 | end += "]"; | |
246 | } | |
247 | desc += parent; | |
248 | } | |
249 | desc += end; | |
250 | // | |
251 | ||
cd26ee07 NR |
252 | try { |
253 | ctor = clazz.getDeclaredConstructor(classes | |
254 | .toArray(new Class[] {})); | |
255 | } catch (NoSuchMethodException nsme) { | |
08f80ac5 | 256 | // TODO: it seems we do not always need a parameter for each |
cd26ee07 NR |
257 | // level, so we currently try "ALL" levels or "FIRST" level |
258 | // only -> we should check the actual rule and use it | |
259 | ctor = clazz.getDeclaredConstructor(classes.get(0)); | |
260 | Object firstParent = args.get(0); | |
261 | args.clear(); | |
262 | args.add(firstParent); | |
263 | } | |
72648e75 | 264 | desc = null; |
aad14586 | 265 | } else { |
aad14586 NR |
266 | ctor = clazz.getDeclaredConstructor(); |
267 | } | |
268 | ||
269 | ctor.setAccessible(true); | |
72648e75 | 270 | return ctor.newInstance(args.toArray()); |
8c8da42a NR |
271 | } catch (ClassNotFoundException e) { |
272 | throw e; | |
aad14586 | 273 | } catch (NoSuchMethodException e) { |
72648e75 | 274 | if (desc != null) { |
949445ee NR |
275 | throw new NoSuchMethodException("Empty constructor not found: " |
276 | + desc); | |
72648e75 | 277 | } |
8c8da42a NR |
278 | throw e; |
279 | } catch (Exception e) { | |
280 | throw new NoSuchMethodException("Cannot instantiate: " + type); | |
aad14586 | 281 | } |
aad14586 | 282 | } |
db31c358 | 283 | |
8c8da42a NR |
284 | /** |
285 | * Insert a custom serialiser that will take precedence over the default one | |
286 | * or the target class. | |
287 | * | |
288 | * @param serializer | |
289 | * the custom serialiser | |
290 | */ | |
db31c358 NR |
291 | static public void addCustomSerializer(CustomSerializer serializer) { |
292 | customTypes.put(serializer.getType(), serializer); | |
293 | } | |
294 | ||
8c8da42a | 295 | /** |
08f80ac5 | 296 | * Serialise the given object into this {@link OutputStream}. |
8c8da42a NR |
297 | * <p> |
298 | * <b>Important: </b>If the operation fails (with a | |
299 | * {@link NotSerializableException}), the {@link StringBuilder} will be | |
300 | * corrupted (will contain bad, most probably not importable data). | |
301 | * | |
08f80ac5 NR |
302 | * @param out |
303 | * the output {@link OutputStream} to serialise to | |
8c8da42a NR |
304 | * @param o |
305 | * the object to serialise | |
306 | * @param map | |
307 | * the map of already serialised objects (if the given object or | |
308 | * one of its descendant is already present in it, only an ID | |
309 | * will be serialised) | |
310 | * | |
311 | * @throws NotSerializableException | |
312 | * if the object cannot be serialised (in this case, the | |
313 | * {@link StringBuilder} can contain bad, most probably not | |
314 | * importable data) | |
08f80ac5 NR |
315 | * @throws IOException |
316 | * in case of I/O errors | |
8c8da42a | 317 | */ |
08f80ac5 NR |
318 | static void append(OutputStream out, Object o, Map<Integer, Object> map) |
319 | throws NotSerializableException, IOException { | |
db31c358 NR |
320 | |
321 | Field[] fields = new Field[] {}; | |
322 | String type = ""; | |
323 | String id = "NULL"; | |
324 | ||
325 | if (o != null) { | |
326 | int hash = System.identityHashCode(o); | |
327 | fields = o.getClass().getDeclaredFields(); | |
328 | type = o.getClass().getCanonicalName(); | |
329 | if (type == null) { | |
72648e75 NR |
330 | // Anonymous inner classes support |
331 | type = o.getClass().getName(); | |
db31c358 NR |
332 | } |
333 | id = Integer.toString(hash); | |
334 | if (map.containsKey(hash)) { | |
335 | fields = new Field[] {}; | |
336 | } else { | |
337 | map.put(hash, o); | |
338 | } | |
339 | } | |
340 | ||
08f80ac5 NR |
341 | write(out, "{\nREF "); |
342 | write(out, type); | |
343 | write(out, "@"); | |
344 | write(out, id); | |
345 | write(out, ":"); | |
346 | ||
347 | if (!encode(out, o)) { // check if direct value | |
ce0974c4 NR |
348 | try { |
349 | for (Field field : fields) { | |
350 | field.setAccessible(true); | |
db31c358 | 351 | |
e570f7eb NR |
352 | if (field.getName().startsWith("this$") |
353 | || field.isSynthetic() | |
354 | || (field.getModifiers() & Modifier.STATIC) == Modifier.STATIC) { | |
ce0974c4 | 355 | // Do not keep this links of nested classes |
e570f7eb NR |
356 | // Do not keep synthetic fields |
357 | // Do not keep final fields | |
ce0974c4 NR |
358 | continue; |
359 | } | |
db31c358 | 360 | |
08f80ac5 NR |
361 | write(out, "\n"); |
362 | write(out, field.getName()); | |
363 | write(out, ":"); | |
db31c358 | 364 | |
08f80ac5 | 365 | Object value = field.get(o); |
db31c358 | 366 | |
08f80ac5 NR |
367 | if (!encode(out, value)) { |
368 | write(out, "\n"); | |
369 | append(out, value, map); | |
ce0974c4 | 370 | } |
db31c358 | 371 | } |
ce0974c4 NR |
372 | } catch (IllegalArgumentException e) { |
373 | e.printStackTrace(); // should not happen (see | |
374 | // setAccessible) | |
375 | } catch (IllegalAccessException e) { | |
376 | e.printStackTrace(); // should not happen (see | |
377 | // setAccessible) | |
db31c358 | 378 | } |
08f80ac5 NR |
379 | |
380 | write(out, "\n}"); | |
db31c358 | 381 | } |
db31c358 NR |
382 | } |
383 | ||
5bc55b51 | 384 | /** |
08f80ac5 NR |
385 | * Encode the object into the given {@link OutputStream} if possible and if |
386 | * supported. | |
949445ee NR |
387 | * <p> |
388 | * A supported object in this context means an object we can directly | |
389 | * encode, like an Integer or a String. Custom objects and arrays are also | |
390 | * considered supported, but <b>compound objects are not supported here</b>. | |
391 | * <p> | |
392 | * For compound objects, you should use {@link Exporter}. | |
5bc55b51 | 393 | * |
08f80ac5 NR |
394 | * @param out |
395 | * the {@link OutputStream} to append to | |
5bc55b51 NR |
396 | * @param value |
397 | * the object to encode (can be NULL, which will be encoded) | |
398 | * | |
08f80ac5 NR |
399 | * @return TRUE if success, FALSE if not (the content of the |
400 | * {@link OutputStream} won't be changed in case of failure) | |
401 | * | |
402 | * @throws IOException | |
403 | * in case of I/O error | |
5bc55b51 | 404 | */ |
08f80ac5 | 405 | static boolean encode(OutputStream out, Object value) throws IOException { |
db31c358 | 406 | if (value == null) { |
08f80ac5 | 407 | write(out, "NULL"); |
72648e75 NR |
408 | } else if (value.getClass().getSimpleName().endsWith("[]")) { |
409 | // Simple name does support [] suffix and do not return NULL for | |
410 | // inner anonymous classes | |
08f80ac5 | 411 | customTypes.get("[]").encode(out, value); |
db31c358 | 412 | } else if (customTypes.containsKey(value.getClass().getCanonicalName())) { |
08f80ac5 NR |
413 | customTypes.get(value.getClass().getCanonicalName())// |
414 | .encode(out, value); | |
db31c358 | 415 | } else if (value instanceof String) { |
08f80ac5 | 416 | encodeString(out, (String) value); |
db31c358 | 417 | } else if (value instanceof Boolean) { |
08f80ac5 | 418 | write(out, value); |
db31c358 | 419 | } else if (value instanceof Byte) { |
08f80ac5 NR |
420 | write(out, value); |
421 | write(out, "b"); | |
db31c358 | 422 | } else if (value instanceof Character) { |
08f80ac5 NR |
423 | encodeString(out, "" + value); |
424 | write(out, "c"); | |
db31c358 | 425 | } else if (value instanceof Short) { |
08f80ac5 NR |
426 | write(out, value); |
427 | write(out, "s"); | |
db31c358 | 428 | } else if (value instanceof Integer) { |
08f80ac5 | 429 | write(out, value); |
db31c358 | 430 | } else if (value instanceof Long) { |
08f80ac5 NR |
431 | write(out, value); |
432 | write(out, "L"); | |
db31c358 | 433 | } else if (value instanceof Float) { |
08f80ac5 NR |
434 | write(out, value); |
435 | write(out, "F"); | |
db31c358 | 436 | } else if (value instanceof Double) { |
08f80ac5 NR |
437 | write(out, value); |
438 | write(out, "d"); | |
e570f7eb NR |
439 | } else if (value instanceof Enum) { |
440 | String type = value.getClass().getCanonicalName(); | |
08f80ac5 NR |
441 | write(out, type); |
442 | write(out, "."); | |
443 | write(out, ((Enum<?>) value).name()); | |
444 | write(out, ";"); | |
db31c358 NR |
445 | } else { |
446 | return false; | |
447 | } | |
448 | ||
449 | return true; | |
450 | } | |
451 | ||
5bc55b51 | 452 | /** |
949445ee NR |
453 | * Decode the data into an equivalent supported source object. |
454 | * <p> | |
455 | * A supported object in this context means an object we can directly | |
456 | * encode, like an Integer or a String. Custom objects and arrays are also | |
457 | * considered supported, but <b>compound objects are not supported here</b>. | |
458 | * <p> | |
459 | * For compound objects, you should use {@link Importer}. | |
5bc55b51 NR |
460 | * |
461 | * @param encodedValue | |
462 | * the encoded data, cannot be NULL | |
463 | * | |
464 | * @return the object (can be NULL for NULL encoded values) | |
465 | * | |
452f38c8 | 466 | * @throws IOException |
5bc55b51 NR |
467 | * if the content cannot be converted |
468 | */ | |
452f38c8 | 469 | static Object decode(String encodedValue) throws IOException { |
5bc55b51 | 470 | try { |
452f38c8 NR |
471 | String cut = ""; |
472 | if (encodedValue.length() > 1) { | |
473 | cut = encodedValue.substring(0, encodedValue.length() - 1); | |
474 | } | |
475 | ||
5bc55b51 NR |
476 | if (CustomSerializer.isCustom(encodedValue)) { |
477 | // custom:TYPE_NAME:"content is String-encoded" | |
478 | String type = CustomSerializer.typeOf(encodedValue); | |
479 | if (customTypes.containsKey(type)) { | |
08f80ac5 NR |
480 | // TODO: we should start with a stream |
481 | InputStream streamEncodedValue = new ByteArrayInputStream( | |
482 | encodedValue.getBytes("UTF-8")); | |
483 | try { | |
484 | return customTypes.get(type).decode(streamEncodedValue); | |
485 | } finally { | |
486 | streamEncodedValue.close(); | |
487 | } | |
5bc55b51 | 488 | } |
452f38c8 | 489 | throw new IOException("Unknown custom type: " + type); |
5bc55b51 NR |
490 | } else if (encodedValue.equals("NULL") |
491 | || encodedValue.equals("null")) { | |
492 | return null; | |
493 | } else if (encodedValue.endsWith("\"")) { | |
494 | return decodeString(encodedValue); | |
495 | } else if (encodedValue.equals("true")) { | |
496 | return true; | |
497 | } else if (encodedValue.equals("false")) { | |
498 | return false; | |
499 | } else if (encodedValue.endsWith("b")) { | |
500 | return Byte.parseByte(cut); | |
501 | } else if (encodedValue.endsWith("c")) { | |
502 | return decodeString(cut).charAt(0); | |
503 | } else if (encodedValue.endsWith("s")) { | |
504 | return Short.parseShort(cut); | |
505 | } else if (encodedValue.endsWith("L")) { | |
506 | return Long.parseLong(cut); | |
507 | } else if (encodedValue.endsWith("F")) { | |
508 | return Float.parseFloat(cut); | |
509 | } else if (encodedValue.endsWith("d")) { | |
510 | return Double.parseDouble(cut); | |
511 | } else if (encodedValue.endsWith(";")) { | |
512 | return decodeEnum(encodedValue); | |
513 | } else { | |
514 | return Integer.parseInt(encodedValue); | |
db31c358 | 515 | } |
5bc55b51 | 516 | } catch (Exception e) { |
452f38c8 NR |
517 | if (e instanceof IOException) { |
518 | throw (IOException) e; | |
5bc55b51 | 519 | } |
08f80ac5 NR |
520 | throw new IOException(e.getMessage(), e); |
521 | } | |
522 | } | |
523 | ||
524 | /** | |
525 | * Write the given {@link String} into the given {@link OutputStream} in | |
526 | * UTF-8. | |
527 | * | |
528 | * @param out | |
529 | * the {@link OutputStream} | |
530 | * @param data | |
531 | * the data to write, cannot be NULL | |
532 | * | |
533 | * @throws IOException | |
534 | * in case of I/O error | |
535 | */ | |
536 | static void write(OutputStream out, Object data) throws IOException { | |
537 | try { | |
538 | out.write(data.toString().getBytes("UTF-8")); | |
539 | } catch (UnsupportedEncodingException e) { | |
540 | // A conforming JVM is required to support UTF-8 | |
541 | e.printStackTrace(); | |
db31c358 NR |
542 | } |
543 | } | |
8c8da42a NR |
544 | |
545 | /** | |
546 | * Return the corresponding class or throw an {@link Exception} if it | |
547 | * cannot. | |
548 | * | |
549 | * @param type | |
550 | * the class name to look for | |
551 | * | |
552 | * @return the class (will never be NULL) | |
553 | * | |
554 | * @throws ClassNotFoundException | |
555 | * if the class cannot be found | |
556 | * @throws NoSuchMethodException | |
557 | * if the class cannot be created (usually because it or its | |
558 | * enclosing class doesn't have an empty constructor) | |
559 | */ | |
560 | static private Class<?> getClass(String type) | |
561 | throws ClassNotFoundException, NoSuchMethodException { | |
aad14586 NR |
562 | Class<?> clazz = null; |
563 | try { | |
564 | clazz = Class.forName(type); | |
565 | } catch (ClassNotFoundException e) { | |
566 | int pos = type.length(); | |
567 | pos = type.lastIndexOf(".", pos); | |
568 | if (pos >= 0) { | |
569 | String parentType = type.substring(0, pos); | |
570 | String nestedType = type.substring(pos + 1); | |
571 | Class<?> javaParent = null; | |
572 | try { | |
573 | javaParent = getClass(parentType); | |
574 | parentType = javaParent.getName(); | |
575 | clazz = Class.forName(parentType + "$" + nestedType); | |
576 | } catch (Exception ee) { | |
577 | } | |
db31c358 | 578 | |
aad14586 NR |
579 | if (javaParent == null) { |
580 | throw new NoSuchMethodException( | |
581 | "Class not found: " | |
582 | + type | |
583 | + " (the enclosing class cannot be created: maybe it doesn't have an empty constructor?)"); | |
584 | } | |
585 | } | |
586 | } | |
587 | ||
8c8da42a NR |
588 | if (clazz == null) { |
589 | throw new ClassNotFoundException("Class not found: " + type); | |
590 | } | |
591 | ||
aad14586 NR |
592 | return clazz; |
593 | } | |
8c8da42a | 594 | |
e570f7eb | 595 | @SuppressWarnings({ "unchecked", "rawtypes" }) |
08f80ac5 | 596 | static private Enum<?> decodeEnum(String escaped) { |
e570f7eb NR |
597 | // escaped: be.xxx.EnumType.VALUE; |
598 | int pos = escaped.lastIndexOf("."); | |
599 | String type = escaped.substring(0, pos); | |
600 | String name = escaped.substring(pos + 1, escaped.length() - 1); | |
601 | ||
602 | try { | |
603 | return Enum.valueOf((Class<Enum>) getClass(type), name); | |
604 | } catch (Exception e) { | |
e570f7eb NR |
605 | throw new UnknownFormatConversionException("Unknown enum: <" + type |
606 | + "> " + name); | |
607 | } | |
608 | } | |
609 | ||
db31c358 | 610 | // aa bb -> "aa\tbb" |
08f80ac5 NR |
611 | static void encodeString(OutputStream out, String raw) throws IOException { |
612 | // TODO: not. efficient. | |
613 | out.write('\"'); | |
614 | // TODO !! utf-8 required | |
db31c358 | 615 | for (char car : raw.toCharArray()) { |
08f80ac5 NR |
616 | encodeString(out, car); |
617 | } | |
618 | out.write('\"'); | |
619 | } | |
620 | ||
621 | // aa bb -> "aa\tbb" | |
622 | static void encodeString(OutputStream out, InputStream raw) | |
623 | throws IOException { | |
624 | out.write('\"'); | |
625 | byte buffer[] = new byte[4096]; | |
626 | for (int len = 0; (len = raw.read(buffer)) > 0;) { | |
627 | for (int i = 0; i < len; i++) { | |
628 | // TODO: not 100% correct, look up howto for UTF-8 | |
629 | encodeString(out, (char) buffer[i]); | |
db31c358 NR |
630 | } |
631 | } | |
08f80ac5 NR |
632 | out.write('\"'); |
633 | } | |
634 | ||
635 | // for encode string, NOT to encode a char by itself! | |
636 | static void encodeString(OutputStream out, char raw) throws IOException { | |
637 | switch (raw) { | |
638 | case '\\': | |
639 | out.write('\\'); | |
640 | out.write('\\'); | |
641 | break; | |
642 | case '\r': | |
643 | out.write('\\'); | |
644 | out.write('r'); | |
645 | break; | |
646 | case '\n': | |
647 | out.write('\\'); | |
648 | out.write('n'); | |
649 | break; | |
650 | case '"': | |
651 | out.write('\\'); | |
652 | out.write('\"'); | |
653 | break; | |
654 | default: | |
655 | out.write(raw); | |
656 | break; | |
657 | } | |
db31c358 NR |
658 | } |
659 | ||
660 | // "aa\tbb" -> aa bb | |
08f80ac5 | 661 | static String decodeString(String escaped) { |
db31c358 NR |
662 | StringBuilder builder = new StringBuilder(); |
663 | ||
664 | boolean escaping = false; | |
665 | for (char car : escaped.toCharArray()) { | |
666 | if (!escaping) { | |
667 | if (car == '\\') { | |
668 | escaping = true; | |
669 | } else { | |
670 | builder.append(car); | |
671 | } | |
672 | } else { | |
673 | switch (car) { | |
674 | case '\\': | |
675 | builder.append('\\'); | |
676 | break; | |
677 | case 'r': | |
678 | builder.append('\r'); | |
679 | break; | |
680 | case 'n': | |
681 | builder.append('\n'); | |
682 | break; | |
683 | case '"': | |
684 | builder.append('"'); | |
685 | break; | |
686 | } | |
687 | escaping = false; | |
688 | } | |
689 | } | |
690 | ||
0988831f | 691 | return builder.substring(1, builder.length() - 1); |
db31c358 NR |
692 | } |
693 | } |