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 | 22 | import be.nikiroo.utils.StringUtils; |
a6a73de3 NR |
23 | import be.nikiroo.utils.streams.Base64InputStream; |
24 | import be.nikiroo.utils.streams.Base64OutputStream; | |
08f80ac5 NR |
25 | import be.nikiroo.utils.streams.NextableInputStream; |
26 | import be.nikiroo.utils.streams.NextableInputStreamStep; | |
e570f7eb | 27 | |
db31c358 | 28 | /** |
8c8da42a | 29 | * Small class to help with serialisation. |
db31c358 NR |
30 | * <p> |
31 | * Note that we do not support inner classes (but we do support nested classes) | |
32 | * and all objects require an empty constructor to be deserialised. | |
5bc55b51 NR |
33 | * <p> |
34 | * It is possible to add support to custom types (both the encoder and the | |
35 | * decoder will require the custom classes) -- see {@link CustomSerializer}. | |
36 | * <p> | |
37 | * Default supported types are: | |
38 | * <ul> | |
39 | * <li>NULL (as a null value)</li> | |
40 | * <li>String</li> | |
41 | * <li>Boolean</li> | |
42 | * <li>Byte</li> | |
43 | * <li>Character</li> | |
44 | * <li>Short</li> | |
45 | * <li>Long</li> | |
46 | * <li>Float</li> | |
47 | * <li>Double</li> | |
48 | * <li>Integer</li> | |
49 | * <li>Enum (any enum whose name and value is known by the caller)</li> | |
50 | * <li>java.awt.image.BufferedImage (as a {@link CustomSerializer})</li> | |
51 | * <li>An array of the above (as a {@link CustomSerializer})</li> | |
f4053377 | 52 | * <li>URL</li> |
5bc55b51 | 53 | * </ul> |
db31c358 NR |
54 | * |
55 | * @author niki | |
56 | */ | |
aad14586 | 57 | public class SerialUtils { |
db31c358 NR |
58 | private static Map<String, CustomSerializer> customTypes; |
59 | ||
60 | static { | |
61 | customTypes = new HashMap<String, CustomSerializer>(); | |
ce0974c4 NR |
62 | |
63 | // Array types: | |
64 | customTypes.put("[]", new CustomSerializer() { | |
65 | @Override | |
08f80ac5 NR |
66 | protected void toStream(OutputStream out, Object value) |
67 | throws IOException { | |
68 | ||
69 | // TODO: we use \n to separate, and b64 to un-\n | |
70 | // -- but we could use \\n ? | |
ce0974c4 NR |
71 | String type = value.getClass().getCanonicalName(); |
72 | type = type.substring(0, type.length() - 2); // remove the [] | |
73 | ||
08f80ac5 | 74 | write(out, type); |
ce0974c4 NR |
75 | try { |
76 | for (int i = 0; true; i++) { | |
77 | Object item = Array.get(value, i); | |
08f80ac5 | 78 | |
ce0974c4 | 79 | // encode it normally if direct value |
08f80ac5 NR |
80 | write(out, "\r"); |
81 | if (!SerialUtils.encode(out, item)) { | |
ce0974c4 | 82 | try { |
08f80ac5 NR |
83 | // TODO: bad escaping? |
84 | write(out, "B64:"); | |
a6a73de3 NR |
85 | OutputStream out64 = new Base64OutputStream( |
86 | out, true); | |
87 | new Exporter(out64).append(item); | |
ce0974c4 NR |
88 | } catch (NotSerializableException e) { |
89 | throw new UnknownFormatConversionException(e | |
90 | .getMessage()); | |
91 | } | |
92 | } | |
ce0974c4 NR |
93 | } |
94 | } catch (ArrayIndexOutOfBoundsException e) { | |
95 | // Done. | |
96 | } | |
ce0974c4 NR |
97 | } |
98 | ||
99 | @Override | |
08f80ac5 NR |
100 | protected Object fromStream(InputStream in) throws IOException { |
101 | NextableInputStream stream = new NextableInputStream(in, | |
102 | new NextableInputStreamStep('\r')); | |
ce0974c4 NR |
103 | |
104 | try { | |
08f80ac5 NR |
105 | List<Object> list = new ArrayList<Object>(); |
106 | stream.next(); | |
107 | String type = IOUtils.readSmallStream(stream); | |
108 | ||
109 | while (stream.next()) { | |
110 | Object value = new Importer().read(stream).getValue(); | |
111 | list.add(value); | |
112 | } | |
113 | ||
ce0974c4 | 114 | Object array = Array.newInstance( |
08f80ac5 NR |
115 | SerialUtils.getClass(type), list.size()); |
116 | for (int i = 0; i < list.size(); i++) { | |
117 | Array.set(array, i, list.get(i)); | |
ce0974c4 NR |
118 | } |
119 | ||
120 | return array; | |
121 | } catch (Exception e) { | |
452f38c8 NR |
122 | if (e instanceof IOException) { |
123 | throw (IOException) e; | |
124 | } | |
125 | throw new IOException(e.getMessage()); | |
ce0974c4 NR |
126 | } |
127 | } | |
08f80ac5 NR |
128 | |
129 | @Override | |
130 | protected String getType() { | |
131 | return "[]"; | |
132 | } | |
ce0974c4 | 133 | }); |
e570f7eb | 134 | |
f4053377 NR |
135 | // URL: |
136 | customTypes.put("java.net.URL", new CustomSerializer() { | |
137 | @Override | |
08f80ac5 NR |
138 | protected void toStream(OutputStream out, Object value) |
139 | throws IOException { | |
140 | String val = ""; | |
f4053377 | 141 | if (value != null) { |
08f80ac5 | 142 | val = ((URL) value).toString(); |
f4053377 | 143 | } |
08f80ac5 NR |
144 | |
145 | out.write(val.getBytes("UTF-8")); | |
f4053377 NR |
146 | } |
147 | ||
148 | @Override | |
08f80ac5 NR |
149 | protected Object fromStream(InputStream in) throws IOException { |
150 | String val = IOUtils.readSmallStream(in); | |
151 | if (!val.isEmpty()) { | |
152 | return new URL(val); | |
f4053377 | 153 | } |
08f80ac5 | 154 | |
f4053377 NR |
155 | return null; |
156 | } | |
157 | ||
158 | @Override | |
159 | protected String getType() { | |
160 | return "java.net.URL"; | |
161 | } | |
162 | }); | |
163 | ||
e570f7eb | 164 | // Images (this is currently the only supported image type by default) |
80500544 | 165 | customTypes.put("be.nikiroo.utils.Image", new CustomSerializer() { |
e570f7eb | 166 | @Override |
08f80ac5 NR |
167 | protected void toStream(OutputStream out, Object value) |
168 | throws IOException { | |
169 | Image img = (Image) value; | |
a6a73de3 | 170 | OutputStream encoded = new Base64OutputStream(out, true); |
08f80ac5 NR |
171 | try { |
172 | InputStream in = img.newInputStream(); | |
173 | try { | |
174 | IOUtils.write(in, encoded); | |
175 | } finally { | |
176 | in.close(); | |
177 | } | |
178 | } finally { | |
179 | encoded.flush(); | |
180 | // Cannot close! | |
181 | } | |
e570f7eb NR |
182 | } |
183 | ||
184 | @Override | |
185 | protected String getType() { | |
80500544 | 186 | return "be.nikiroo.utils.Image"; |
e570f7eb NR |
187 | } |
188 | ||
189 | @Override | |
08f80ac5 | 190 | protected Object fromStream(InputStream in) throws IOException { |
e570f7eb | 191 | try { |
08f80ac5 | 192 | // Cannot close it! |
a6a73de3 | 193 | InputStream decoded = new Base64InputStream(in, false); |
08f80ac5 | 194 | return new Image(decoded); |
e570f7eb NR |
195 | } catch (IOException e) { |
196 | throw new UnknownFormatConversionException(e.getMessage()); | |
197 | } | |
198 | } | |
199 | }); | |
db31c358 | 200 | } |
8c8da42a | 201 | |
aad14586 NR |
202 | /** |
203 | * Create an empty object of the given type. | |
204 | * | |
205 | * @param type | |
206 | * the object type (its class name) | |
207 | * | |
208 | * @return the new object | |
209 | * | |
8c8da42a NR |
210 | * @throws ClassNotFoundException |
211 | * if the class cannot be found | |
212 | * @throws NoSuchMethodException | |
213 | * if the given class is not compatible with this code | |
aad14586 | 214 | */ |
8c8da42a NR |
215 | public static Object createObject(String type) |
216 | throws ClassNotFoundException, NoSuchMethodException { | |
aad14586 | 217 | |
72648e75 | 218 | String desc = null; |
aad14586 NR |
219 | try { |
220 | Class<?> clazz = getClass(type); | |
aad14586 | 221 | String className = clazz.getName(); |
72648e75 NR |
222 | List<Object> args = new ArrayList<Object>(); |
223 | List<Class<?>> classes = new ArrayList<Class<?>>(); | |
aad14586 NR |
224 | Constructor<?> ctor = null; |
225 | if (className.contains("$")) { | |
72648e75 NR |
226 | for (String parentName = className.substring(0, |
227 | className.lastIndexOf('$'));; parentName = parentName | |
949445ee | 228 | .substring(0, parentName.lastIndexOf('$'))) { |
72648e75 NR |
229 | Object parent = createObject(parentName); |
230 | args.add(parent); | |
231 | classes.add(parent.getClass()); | |
949445ee | 232 | |
72648e75 NR |
233 | if (!parentName.contains("$")) { |
234 | break; | |
235 | } | |
236 | } | |
237 | ||
238 | // Better error description in case there is no empty | |
239 | // constructor: | |
240 | desc = ""; | |
241 | String end = ""; | |
242 | for (Class<?> parent = clazz; parent != null | |
243 | && !parent.equals(Object.class); parent = parent | |
949445ee | 244 | .getSuperclass()) { |
72648e75 NR |
245 | if (!desc.isEmpty()) { |
246 | desc += " [:"; | |
247 | end += "]"; | |
248 | } | |
249 | desc += parent; | |
250 | } | |
251 | desc += end; | |
252 | // | |
253 | ||
cd26ee07 NR |
254 | try { |
255 | ctor = clazz.getDeclaredConstructor(classes | |
256 | .toArray(new Class[] {})); | |
257 | } catch (NoSuchMethodException nsme) { | |
08f80ac5 | 258 | // TODO: it seems we do not always need a parameter for each |
cd26ee07 NR |
259 | // level, so we currently try "ALL" levels or "FIRST" level |
260 | // only -> we should check the actual rule and use it | |
261 | ctor = clazz.getDeclaredConstructor(classes.get(0)); | |
262 | Object firstParent = args.get(0); | |
263 | args.clear(); | |
264 | args.add(firstParent); | |
265 | } | |
72648e75 | 266 | desc = null; |
aad14586 | 267 | } else { |
aad14586 NR |
268 | ctor = clazz.getDeclaredConstructor(); |
269 | } | |
270 | ||
271 | ctor.setAccessible(true); | |
72648e75 | 272 | return ctor.newInstance(args.toArray()); |
8c8da42a NR |
273 | } catch (ClassNotFoundException e) { |
274 | throw e; | |
aad14586 | 275 | } catch (NoSuchMethodException e) { |
72648e75 | 276 | if (desc != null) { |
949445ee NR |
277 | throw new NoSuchMethodException("Empty constructor not found: " |
278 | + desc); | |
72648e75 | 279 | } |
8c8da42a NR |
280 | throw e; |
281 | } catch (Exception e) { | |
282 | throw new NoSuchMethodException("Cannot instantiate: " + type); | |
aad14586 | 283 | } |
aad14586 | 284 | } |
db31c358 | 285 | |
8c8da42a NR |
286 | /** |
287 | * Insert a custom serialiser that will take precedence over the default one | |
288 | * or the target class. | |
289 | * | |
290 | * @param serializer | |
291 | * the custom serialiser | |
292 | */ | |
db31c358 NR |
293 | static public void addCustomSerializer(CustomSerializer serializer) { |
294 | customTypes.put(serializer.getType(), serializer); | |
295 | } | |
296 | ||
8c8da42a | 297 | /** |
08f80ac5 | 298 | * Serialise the given object into this {@link OutputStream}. |
8c8da42a NR |
299 | * <p> |
300 | * <b>Important: </b>If the operation fails (with a | |
301 | * {@link NotSerializableException}), the {@link StringBuilder} will be | |
302 | * corrupted (will contain bad, most probably not importable data). | |
303 | * | |
08f80ac5 NR |
304 | * @param out |
305 | * the output {@link OutputStream} to serialise to | |
8c8da42a NR |
306 | * @param o |
307 | * the object to serialise | |
308 | * @param map | |
309 | * the map of already serialised objects (if the given object or | |
310 | * one of its descendant is already present in it, only an ID | |
311 | * will be serialised) | |
312 | * | |
313 | * @throws NotSerializableException | |
314 | * if the object cannot be serialised (in this case, the | |
315 | * {@link StringBuilder} can contain bad, most probably not | |
316 | * importable data) | |
08f80ac5 NR |
317 | * @throws IOException |
318 | * in case of I/O errors | |
8c8da42a | 319 | */ |
08f80ac5 NR |
320 | static void append(OutputStream out, Object o, Map<Integer, Object> map) |
321 | throws NotSerializableException, IOException { | |
db31c358 NR |
322 | |
323 | Field[] fields = new Field[] {}; | |
324 | String type = ""; | |
325 | String id = "NULL"; | |
326 | ||
327 | if (o != null) { | |
328 | int hash = System.identityHashCode(o); | |
329 | fields = o.getClass().getDeclaredFields(); | |
330 | type = o.getClass().getCanonicalName(); | |
331 | if (type == null) { | |
72648e75 NR |
332 | // Anonymous inner classes support |
333 | type = o.getClass().getName(); | |
db31c358 NR |
334 | } |
335 | id = Integer.toString(hash); | |
336 | if (map.containsKey(hash)) { | |
337 | fields = new Field[] {}; | |
338 | } else { | |
339 | map.put(hash, o); | |
340 | } | |
341 | } | |
342 | ||
08f80ac5 NR |
343 | write(out, "{\nREF "); |
344 | write(out, type); | |
345 | write(out, "@"); | |
346 | write(out, id); | |
347 | write(out, ":"); | |
348 | ||
349 | if (!encode(out, o)) { // check if direct value | |
ce0974c4 NR |
350 | try { |
351 | for (Field field : fields) { | |
352 | field.setAccessible(true); | |
db31c358 | 353 | |
e570f7eb NR |
354 | if (field.getName().startsWith("this$") |
355 | || field.isSynthetic() | |
356 | || (field.getModifiers() & Modifier.STATIC) == Modifier.STATIC) { | |
ce0974c4 | 357 | // Do not keep this links of nested classes |
e570f7eb NR |
358 | // Do not keep synthetic fields |
359 | // Do not keep final fields | |
ce0974c4 NR |
360 | continue; |
361 | } | |
db31c358 | 362 | |
08f80ac5 NR |
363 | write(out, "\n"); |
364 | write(out, field.getName()); | |
365 | write(out, ":"); | |
db31c358 | 366 | |
08f80ac5 | 367 | Object value = field.get(o); |
db31c358 | 368 | |
08f80ac5 NR |
369 | if (!encode(out, value)) { |
370 | write(out, "\n"); | |
371 | append(out, value, map); | |
ce0974c4 | 372 | } |
db31c358 | 373 | } |
ce0974c4 NR |
374 | } catch (IllegalArgumentException e) { |
375 | e.printStackTrace(); // should not happen (see | |
376 | // setAccessible) | |
377 | } catch (IllegalAccessException e) { | |
378 | e.printStackTrace(); // should not happen (see | |
379 | // setAccessible) | |
db31c358 | 380 | } |
08f80ac5 NR |
381 | |
382 | write(out, "\n}"); | |
db31c358 | 383 | } |
db31c358 NR |
384 | } |
385 | ||
5bc55b51 | 386 | /** |
08f80ac5 NR |
387 | * Encode the object into the given {@link OutputStream} if possible and if |
388 | * supported. | |
949445ee NR |
389 | * <p> |
390 | * A supported object in this context means an object we can directly | |
391 | * encode, like an Integer or a String. Custom objects and arrays are also | |
392 | * considered supported, but <b>compound objects are not supported here</b>. | |
393 | * <p> | |
394 | * For compound objects, you should use {@link Exporter}. | |
5bc55b51 | 395 | * |
08f80ac5 NR |
396 | * @param out |
397 | * the {@link OutputStream} to append to | |
5bc55b51 NR |
398 | * @param value |
399 | * the object to encode (can be NULL, which will be encoded) | |
400 | * | |
08f80ac5 NR |
401 | * @return TRUE if success, FALSE if not (the content of the |
402 | * {@link OutputStream} won't be changed in case of failure) | |
403 | * | |
404 | * @throws IOException | |
405 | * in case of I/O error | |
5bc55b51 | 406 | */ |
08f80ac5 | 407 | static boolean encode(OutputStream out, Object value) throws IOException { |
db31c358 | 408 | if (value == null) { |
08f80ac5 | 409 | write(out, "NULL"); |
72648e75 NR |
410 | } else if (value.getClass().getSimpleName().endsWith("[]")) { |
411 | // Simple name does support [] suffix and do not return NULL for | |
412 | // inner anonymous classes | |
08f80ac5 | 413 | customTypes.get("[]").encode(out, value); |
db31c358 | 414 | } else if (customTypes.containsKey(value.getClass().getCanonicalName())) { |
08f80ac5 NR |
415 | customTypes.get(value.getClass().getCanonicalName())// |
416 | .encode(out, value); | |
db31c358 | 417 | } else if (value instanceof String) { |
08f80ac5 | 418 | encodeString(out, (String) value); |
db31c358 | 419 | } else if (value instanceof Boolean) { |
08f80ac5 | 420 | write(out, value); |
db31c358 | 421 | } else if (value instanceof Byte) { |
08f80ac5 NR |
422 | write(out, value); |
423 | write(out, "b"); | |
db31c358 | 424 | } else if (value instanceof Character) { |
08f80ac5 NR |
425 | encodeString(out, "" + value); |
426 | write(out, "c"); | |
db31c358 | 427 | } else if (value instanceof Short) { |
08f80ac5 NR |
428 | write(out, value); |
429 | write(out, "s"); | |
db31c358 | 430 | } else if (value instanceof Integer) { |
08f80ac5 | 431 | write(out, value); |
db31c358 | 432 | } else if (value instanceof Long) { |
08f80ac5 NR |
433 | write(out, value); |
434 | write(out, "L"); | |
db31c358 | 435 | } else if (value instanceof Float) { |
08f80ac5 NR |
436 | write(out, value); |
437 | write(out, "F"); | |
db31c358 | 438 | } else if (value instanceof Double) { |
08f80ac5 NR |
439 | write(out, value); |
440 | write(out, "d"); | |
e570f7eb NR |
441 | } else if (value instanceof Enum) { |
442 | String type = value.getClass().getCanonicalName(); | |
08f80ac5 NR |
443 | write(out, type); |
444 | write(out, "."); | |
445 | write(out, ((Enum<?>) value).name()); | |
446 | write(out, ";"); | |
db31c358 NR |
447 | } else { |
448 | return false; | |
449 | } | |
450 | ||
451 | return true; | |
452 | } | |
453 | ||
5bc55b51 | 454 | /** |
949445ee NR |
455 | * Decode the data into an equivalent supported source object. |
456 | * <p> | |
457 | * A supported object in this context means an object we can directly | |
458 | * encode, like an Integer or a String. Custom objects and arrays are also | |
459 | * considered supported, but <b>compound objects are not supported here</b>. | |
460 | * <p> | |
461 | * For compound objects, you should use {@link Importer}. | |
5bc55b51 NR |
462 | * |
463 | * @param encodedValue | |
464 | * the encoded data, cannot be NULL | |
465 | * | |
466 | * @return the object (can be NULL for NULL encoded values) | |
467 | * | |
452f38c8 | 468 | * @throws IOException |
5bc55b51 NR |
469 | * if the content cannot be converted |
470 | */ | |
452f38c8 | 471 | static Object decode(String encodedValue) throws IOException { |
5bc55b51 | 472 | try { |
452f38c8 NR |
473 | String cut = ""; |
474 | if (encodedValue.length() > 1) { | |
475 | cut = encodedValue.substring(0, encodedValue.length() - 1); | |
476 | } | |
477 | ||
5bc55b51 NR |
478 | if (CustomSerializer.isCustom(encodedValue)) { |
479 | // custom:TYPE_NAME:"content is String-encoded" | |
480 | String type = CustomSerializer.typeOf(encodedValue); | |
481 | if (customTypes.containsKey(type)) { | |
08f80ac5 NR |
482 | // TODO: we should start with a stream |
483 | InputStream streamEncodedValue = new ByteArrayInputStream( | |
484 | encodedValue.getBytes("UTF-8")); | |
485 | try { | |
486 | return customTypes.get(type).decode(streamEncodedValue); | |
487 | } finally { | |
488 | streamEncodedValue.close(); | |
489 | } | |
5bc55b51 | 490 | } |
452f38c8 | 491 | throw new IOException("Unknown custom type: " + type); |
5bc55b51 NR |
492 | } else if (encodedValue.equals("NULL") |
493 | || encodedValue.equals("null")) { | |
494 | return null; | |
495 | } else if (encodedValue.endsWith("\"")) { | |
496 | return decodeString(encodedValue); | |
497 | } else if (encodedValue.equals("true")) { | |
498 | return true; | |
499 | } else if (encodedValue.equals("false")) { | |
500 | return false; | |
501 | } else if (encodedValue.endsWith("b")) { | |
502 | return Byte.parseByte(cut); | |
503 | } else if (encodedValue.endsWith("c")) { | |
504 | return decodeString(cut).charAt(0); | |
505 | } else if (encodedValue.endsWith("s")) { | |
506 | return Short.parseShort(cut); | |
507 | } else if (encodedValue.endsWith("L")) { | |
508 | return Long.parseLong(cut); | |
509 | } else if (encodedValue.endsWith("F")) { | |
510 | return Float.parseFloat(cut); | |
511 | } else if (encodedValue.endsWith("d")) { | |
512 | return Double.parseDouble(cut); | |
513 | } else if (encodedValue.endsWith(";")) { | |
514 | return decodeEnum(encodedValue); | |
515 | } else { | |
516 | return Integer.parseInt(encodedValue); | |
db31c358 | 517 | } |
5bc55b51 | 518 | } catch (Exception e) { |
452f38c8 NR |
519 | if (e instanceof IOException) { |
520 | throw (IOException) e; | |
5bc55b51 | 521 | } |
08f80ac5 NR |
522 | throw new IOException(e.getMessage(), e); |
523 | } | |
524 | } | |
525 | ||
526 | /** | |
527 | * Write the given {@link String} into the given {@link OutputStream} in | |
528 | * UTF-8. | |
529 | * | |
530 | * @param out | |
531 | * the {@link OutputStream} | |
532 | * @param data | |
533 | * the data to write, cannot be NULL | |
534 | * | |
535 | * @throws IOException | |
536 | * in case of I/O error | |
537 | */ | |
538 | static void write(OutputStream out, Object data) throws IOException { | |
539 | try { | |
540 | out.write(data.toString().getBytes("UTF-8")); | |
541 | } catch (UnsupportedEncodingException e) { | |
542 | // A conforming JVM is required to support UTF-8 | |
543 | e.printStackTrace(); | |
db31c358 NR |
544 | } |
545 | } | |
8c8da42a NR |
546 | |
547 | /** | |
548 | * Return the corresponding class or throw an {@link Exception} if it | |
549 | * cannot. | |
550 | * | |
551 | * @param type | |
552 | * the class name to look for | |
553 | * | |
554 | * @return the class (will never be NULL) | |
555 | * | |
556 | * @throws ClassNotFoundException | |
557 | * if the class cannot be found | |
558 | * @throws NoSuchMethodException | |
559 | * if the class cannot be created (usually because it or its | |
560 | * enclosing class doesn't have an empty constructor) | |
561 | */ | |
562 | static private Class<?> getClass(String type) | |
563 | throws ClassNotFoundException, NoSuchMethodException { | |
aad14586 NR |
564 | Class<?> clazz = null; |
565 | try { | |
566 | clazz = Class.forName(type); | |
567 | } catch (ClassNotFoundException e) { | |
568 | int pos = type.length(); | |
569 | pos = type.lastIndexOf(".", pos); | |
570 | if (pos >= 0) { | |
571 | String parentType = type.substring(0, pos); | |
572 | String nestedType = type.substring(pos + 1); | |
573 | Class<?> javaParent = null; | |
574 | try { | |
575 | javaParent = getClass(parentType); | |
576 | parentType = javaParent.getName(); | |
577 | clazz = Class.forName(parentType + "$" + nestedType); | |
578 | } catch (Exception ee) { | |
579 | } | |
db31c358 | 580 | |
aad14586 NR |
581 | if (javaParent == null) { |
582 | throw new NoSuchMethodException( | |
583 | "Class not found: " | |
584 | + type | |
585 | + " (the enclosing class cannot be created: maybe it doesn't have an empty constructor?)"); | |
586 | } | |
587 | } | |
588 | } | |
589 | ||
8c8da42a NR |
590 | if (clazz == null) { |
591 | throw new ClassNotFoundException("Class not found: " + type); | |
592 | } | |
593 | ||
aad14586 NR |
594 | return clazz; |
595 | } | |
8c8da42a | 596 | |
e570f7eb | 597 | @SuppressWarnings({ "unchecked", "rawtypes" }) |
08f80ac5 | 598 | static private Enum<?> decodeEnum(String escaped) { |
e570f7eb NR |
599 | // escaped: be.xxx.EnumType.VALUE; |
600 | int pos = escaped.lastIndexOf("."); | |
601 | String type = escaped.substring(0, pos); | |
602 | String name = escaped.substring(pos + 1, escaped.length() - 1); | |
603 | ||
604 | try { | |
605 | return Enum.valueOf((Class<Enum>) getClass(type), name); | |
606 | } catch (Exception e) { | |
e570f7eb NR |
607 | throw new UnknownFormatConversionException("Unknown enum: <" + type |
608 | + "> " + name); | |
609 | } | |
610 | } | |
611 | ||
db31c358 | 612 | // aa bb -> "aa\tbb" |
08f80ac5 NR |
613 | static void encodeString(OutputStream out, String raw) throws IOException { |
614 | // TODO: not. efficient. | |
615 | out.write('\"'); | |
616 | // TODO !! utf-8 required | |
db31c358 | 617 | for (char car : raw.toCharArray()) { |
08f80ac5 NR |
618 | encodeString(out, car); |
619 | } | |
620 | out.write('\"'); | |
621 | } | |
622 | ||
623 | // aa bb -> "aa\tbb" | |
624 | static void encodeString(OutputStream out, InputStream raw) | |
625 | throws IOException { | |
626 | out.write('\"'); | |
627 | byte buffer[] = new byte[4096]; | |
628 | for (int len = 0; (len = raw.read(buffer)) > 0;) { | |
629 | for (int i = 0; i < len; i++) { | |
630 | // TODO: not 100% correct, look up howto for UTF-8 | |
631 | encodeString(out, (char) buffer[i]); | |
db31c358 NR |
632 | } |
633 | } | |
08f80ac5 NR |
634 | out.write('\"'); |
635 | } | |
636 | ||
637 | // for encode string, NOT to encode a char by itself! | |
638 | static void encodeString(OutputStream out, char raw) throws IOException { | |
639 | switch (raw) { | |
640 | case '\\': | |
641 | out.write('\\'); | |
642 | out.write('\\'); | |
643 | break; | |
644 | case '\r': | |
645 | out.write('\\'); | |
646 | out.write('r'); | |
647 | break; | |
648 | case '\n': | |
649 | out.write('\\'); | |
650 | out.write('n'); | |
651 | break; | |
652 | case '"': | |
653 | out.write('\\'); | |
654 | out.write('\"'); | |
655 | break; | |
656 | default: | |
657 | out.write(raw); | |
658 | break; | |
659 | } | |
db31c358 NR |
660 | } |
661 | ||
662 | // "aa\tbb" -> aa bb | |
08f80ac5 | 663 | static String decodeString(String escaped) { |
db31c358 NR |
664 | StringBuilder builder = new StringBuilder(); |
665 | ||
666 | boolean escaping = false; | |
667 | for (char car : escaped.toCharArray()) { | |
668 | if (!escaping) { | |
669 | if (car == '\\') { | |
670 | escaping = true; | |
671 | } else { | |
672 | builder.append(car); | |
673 | } | |
674 | } else { | |
675 | switch (car) { | |
676 | case '\\': | |
677 | builder.append('\\'); | |
678 | break; | |
679 | case 'r': | |
680 | builder.append('\r'); | |
681 | break; | |
682 | case 'n': | |
683 | builder.append('\n'); | |
684 | break; | |
685 | case '"': | |
686 | builder.append('"'); | |
687 | break; | |
688 | } | |
689 | escaping = false; | |
690 | } | |
691 | } | |
692 | ||
0988831f | 693 | return builder.substring(1, builder.length() - 1); |
db31c358 NR |
694 | } |
695 | } |