author | lancea |
Thu, 01 Nov 2012 17:35:17 -0400 | |
changeset 14337 | a003c6a54cb6 |
parent 11129 | f9ad1aadf3fa |
child 14781 | 701d0765f75f |
permissions | -rw-r--r-- |
2 | 1 |
/* |
14337
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
2 |
* Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
2 | 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 |
* |
|
5 |
* This code is free software; you can redistribute it and/or modify it |
|
6 |
* under the terms of the GNU General Public License version 2 only, as |
|
5506 | 7 |
* published by the Free Software Foundation. Oracle designates this |
2 | 8 |
* particular file as subject to the "Classpath" exception as provided |
5506 | 9 |
* by Oracle in the LICENSE file that accompanied this code. |
2 | 10 |
* |
11 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
|
12 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
13 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
14 |
* version 2 for more details (a copy is included in the LICENSE file that |
|
15 |
* accompanied this code). |
|
16 |
* |
|
17 |
* You should have received a copy of the GNU General Public License version |
|
18 |
* 2 along with this work; if not, write to the Free Software Foundation, |
|
19 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
|
20 |
* |
|
5506 | 21 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
22 |
* or visit www.oracle.com if you need additional information or have any |
|
23 |
* questions. |
|
2 | 24 |
*/ |
25 |
||
26 |
package javax.sql.rowset.serial; |
|
27 |
||
28 |
import java.sql.*; |
|
29 |
import java.io.*; |
|
30 |
import java.lang.reflect.*; |
|
14337
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
31 |
import java.util.Arrays; |
2 | 32 |
|
33 |
||
34 |
/** |
|
35 |
* A serialized mapping in the Java programming language of an SQL |
|
36 |
* <code>BLOB</code> value. |
|
37 |
* <P> |
|
38 |
* The <code>SerialBlob</code> class provides a constructor for creating |
|
39 |
* an instance from a <code>Blob</code> object. Note that the |
|
40 |
* <code>Blob</code> |
|
41 |
* object should have brought the SQL <code>BLOB</code> value's data over |
|
42 |
* to the client before a <code>SerialBlob</code> object |
|
43 |
* is constructed from it. The data of an SQL <code>BLOB</code> value can |
|
44 |
* be materialized on the client as an array of bytes (using the method |
|
45 |
* <code>Blob.getBytes</code>) or as a stream of uninterpreted bytes |
|
46 |
* (using the method <code>Blob.getBinaryStream</code>). |
|
47 |
* <P> |
|
48 |
* <code>SerialBlob</code> methods make it possible to make a copy of a |
|
49 |
* <code>SerialBlob</code> object as an array of bytes or as a stream. |
|
50 |
* They also make it possible to locate a given pattern of bytes or a |
|
51 |
* <code>Blob</code> object within a <code>SerialBlob</code> object |
|
52 |
* and to update or truncate a <code>Blob</code> object. |
|
53 |
* |
|
54 |
* @author Jonathan Bruce |
|
55 |
*/ |
|
56 |
public class SerialBlob implements Blob, Serializable, Cloneable { |
|
57 |
||
58 |
/** |
|
59 |
* A serialized array of uninterpreted bytes representing the |
|
60 |
* value of this <code>SerialBlob</code> object. |
|
61 |
* @serial |
|
62 |
*/ |
|
63 |
private byte buf[]; |
|
64 |
||
65 |
/** |
|
66 |
* The internal representation of the <code>Blob</code> object on which this |
|
67 |
* <code>SerialBlob</code> object is based. |
|
68 |
*/ |
|
69 |
private Blob blob; |
|
70 |
||
71 |
/** |
|
72 |
* The number of bytes in this <code>SerialBlob</code> object's |
|
73 |
* array of bytes. |
|
74 |
* @serial |
|
75 |
*/ |
|
76 |
private long len; |
|
77 |
||
78 |
/** |
|
79 |
* The orginal number of bytes in this <code>SerialBlob</code> object's |
|
80 |
* array of bytes when it was first established. |
|
81 |
* @serial |
|
82 |
*/ |
|
83 |
private long origLen; |
|
84 |
||
85 |
/** |
|
86 |
* Constructs a <code>SerialBlob</code> object that is a serialized version of |
|
87 |
* the given <code>byte</code> array. |
|
88 |
* <p> |
|
89 |
* The new <code>SerialBlob</code> object is initialized with the data from the |
|
90 |
* <code>byte</code> array, thus allowing disconnected <code>RowSet</code> |
|
91 |
* objects to establish serialized <code>Blob</code> objects without |
|
92 |
* touching the data source. |
|
93 |
* |
|
94 |
* @param b the <code>byte</code> array containing the data for the |
|
95 |
* <code>Blob</code> object to be serialized |
|
96 |
* @throws SerialException if an error occurs during serialization |
|
97 |
* @throws SQLException if a SQL errors occurs |
|
98 |
*/ |
|
99 |
public SerialBlob(byte[] b) throws SerialException, SQLException { |
|
100 |
||
101 |
len = b.length; |
|
102 |
buf = new byte[(int)len]; |
|
103 |
for(int i = 0; i < len; i++) { |
|
104 |
buf[i] = b[i]; |
|
105 |
} |
|
106 |
origLen = len; |
|
107 |
} |
|
108 |
||
109 |
||
110 |
/** |
|
111 |
* Constructs a <code>SerialBlob</code> object that is a serialized |
|
112 |
* version of the given <code>Blob</code> object. |
|
113 |
* <P> |
|
114 |
* The new <code>SerialBlob</code> object is initialized with the |
|
115 |
* data from the <code>Blob</code> object; therefore, the |
|
116 |
* <code>Blob</code> object should have previously brought the |
|
117 |
* SQL <code>BLOB</code> value's data over to the client from |
|
118 |
* the database. Otherwise, the new <code>SerialBlob</code> object |
|
119 |
* will contain no data. |
|
120 |
* |
|
121 |
* @param blob the <code>Blob</code> object from which this |
|
122 |
* <code>SerialBlob</code> object is to be constructed; |
|
123 |
* cannot be null. |
|
124 |
* @throws SerialException if an error occurs during serialization |
|
125 |
* @throws SQLException if the <code>Blob</code> passed to this |
|
126 |
* to this constructor is a <code>null</code>. |
|
127 |
* @see java.sql.Blob |
|
128 |
*/ |
|
129 |
public SerialBlob (Blob blob) throws SerialException, SQLException { |
|
130 |
||
131 |
if (blob == null) { |
|
132 |
throw new SQLException("Cannot instantiate a SerialBlob " + |
|
133 |
"object with a null Blob object"); |
|
134 |
} |
|
135 |
||
136 |
len = blob.length(); |
|
137 |
buf = blob.getBytes(1, (int)len ); |
|
138 |
this.blob = blob; |
|
139 |
||
140 |
//if ( len < 10240000) |
|
141 |
// len = 10240000; |
|
142 |
origLen = len; |
|
143 |
} |
|
144 |
||
145 |
/** |
|
146 |
* Copies the specified number of bytes, starting at the given |
|
147 |
* position, from this <code>SerialBlob</code> object to |
|
148 |
* another array of bytes. |
|
149 |
* <P> |
|
150 |
* Note that if the given number of bytes to be copied is larger than |
|
151 |
* the length of this <code>SerialBlob</code> object's array of |
|
152 |
* bytes, the given number will be shortened to the array's length. |
|
153 |
* |
|
154 |
* @param pos the ordinal position of the first byte in this |
|
155 |
* <code>SerialBlob</code> object to be copied; |
|
156 |
* numbering starts at <code>1</code>; must not be less |
|
157 |
* than <code>1</code> and must be less than or equal |
|
158 |
* to the length of this <code>SerialBlob</code> object |
|
159 |
* @param length the number of bytes to be copied |
|
160 |
* @return an array of bytes that is a copy of a region of this |
|
161 |
* <code>SerialBlob</code> object, starting at the given |
|
162 |
* position and containing the given number of consecutive bytes |
|
163 |
* @throws SerialException if the given starting position is out of bounds |
|
164 |
*/ |
|
165 |
public byte[] getBytes(long pos, int length) throws SerialException { |
|
166 |
if (length > len) { |
|
167 |
length = (int)len; |
|
168 |
} |
|
169 |
||
7544 | 170 |
if (pos < 1 || len - pos < 0 ) { |
171 |
throw new SerialException("Invalid arguments: position cannot be " |
|
172 |
+ "less than 1 or greater than the length of the SerialBlob"); |
|
2 | 173 |
} |
174 |
||
175 |
pos--; // correct pos to array index |
|
176 |
||
177 |
byte[] b = new byte[length]; |
|
178 |
||
179 |
for (int i = 0; i < length; i++) { |
|
180 |
b[i] = this.buf[(int)pos]; |
|
181 |
pos++; |
|
182 |
} |
|
183 |
return b; |
|
184 |
} |
|
185 |
||
186 |
/** |
|
187 |
* Retrieves the number of bytes in this <code>SerialBlob</code> |
|
188 |
* object's array of bytes. |
|
189 |
* |
|
190 |
* @return a <code>long</code> indicating the length in bytes of this |
|
191 |
* <code>SerialBlob</code> object's array of bytes |
|
192 |
* @throws SerialException if an error occurs |
|
193 |
*/ |
|
194 |
public long length() throws SerialException { |
|
195 |
return len; |
|
196 |
} |
|
197 |
||
198 |
/** |
|
199 |
* Returns this <code>SerialBlob</code> object as an input stream. |
|
200 |
* Unlike the related method, <code>setBinaryStream</code>, |
|
201 |
* a stream is produced regardless of whether the <code>SerialBlob</code> |
|
202 |
* was created with a <code>Blob</code> object or a <code>byte</code> array. |
|
203 |
* |
|
204 |
* @return a <code>java.io.InputStream</code> object that contains |
|
205 |
* this <code>SerialBlob</code> object's array of bytes |
|
206 |
* @throws SerialException if an error occurs |
|
207 |
* @see #setBinaryStream |
|
208 |
*/ |
|
209 |
public java.io.InputStream getBinaryStream() throws SerialException { |
|
210 |
InputStream stream = new ByteArrayInputStream(buf); |
|
11129
f9ad1aadf3fa
7116445: Miscellaneous warnings in the JDBC/RowSet classes
lancea
parents:
10323
diff
changeset
|
211 |
return stream; |
2 | 212 |
} |
213 |
||
214 |
/** |
|
215 |
* Returns the position in this <code>SerialBlob</code> object where |
|
216 |
* the given pattern of bytes begins, starting the search at the |
|
217 |
* specified position. |
|
218 |
* |
|
219 |
* @param pattern the pattern of bytes for which to search |
|
220 |
* @param start the position of the byte in this |
|
221 |
* <code>SerialBlob</code> object from which to begin |
|
222 |
* the search; the first position is <code>1</code>; |
|
223 |
* must not be less than <code>1</code> nor greater than |
|
224 |
* the length of this <code>SerialBlob</code> object |
|
225 |
* @return the position in this <code>SerialBlob</code> object |
|
226 |
* where the given pattern begins, starting at the specified |
|
227 |
* position; <code>-1</code> if the pattern is not found |
|
228 |
* or the given starting position is out of bounds; position |
|
229 |
* numbering for the return value starts at <code>1</code> |
|
230 |
* @throws SerialException if an error occurs when serializing the blob |
|
231 |
* @throws SQLException if there is an error accessing the <code>BLOB</code> |
|
232 |
* value from the database |
|
233 |
*/ |
|
234 |
public long position(byte[] pattern, long start) |
|
235 |
throws SerialException, SQLException { |
|
236 |
if (start < 1 || start > len) { |
|
237 |
return -1; |
|
238 |
} |
|
239 |
||
240 |
int pos = (int)start-1; // internally Blobs are stored as arrays. |
|
241 |
int i = 0; |
|
242 |
long patlen = pattern.length; |
|
243 |
||
244 |
while (pos < len) { |
|
245 |
if (pattern[i] == buf[pos]) { |
|
246 |
if (i + 1 == patlen) { |
|
247 |
return (pos + 1) - (patlen - 1); |
|
248 |
} |
|
249 |
i++; pos++; // increment pos, and i |
|
250 |
} else if (pattern[i] != buf[pos]) { |
|
251 |
pos++; // increment pos only |
|
252 |
} |
|
253 |
} |
|
254 |
return -1; // not found |
|
255 |
} |
|
256 |
||
257 |
/** |
|
258 |
* Returns the position in this <code>SerialBlob</code> object where |
|
259 |
* the given <code>Blob</code> object begins, starting the search at the |
|
260 |
* specified position. |
|
261 |
* |
|
262 |
* @param pattern the <code>Blob</code> object for which to search; |
|
263 |
* @param start the position of the byte in this |
|
264 |
* <code>SerialBlob</code> object from which to begin |
|
265 |
* the search; the first position is <code>1</code>; |
|
266 |
* must not be less than <code>1</code> nor greater than |
|
267 |
* the length of this <code>SerialBlob</code> object |
|
268 |
* @return the position in this <code>SerialBlob</code> object |
|
269 |
* where the given <code>Blob</code> object begins, starting |
|
270 |
* at the specified position; <code>-1</code> if the pattern is |
|
271 |
* not found or the given starting position is out of bounds; |
|
272 |
* position numbering for the return value starts at <code>1</code> |
|
273 |
* @throws SerialException if an error occurs when serializing the blob |
|
274 |
* @throws SQLException if there is an error accessing the <code>BLOB</code> |
|
275 |
* value from the database |
|
276 |
*/ |
|
277 |
public long position(Blob pattern, long start) |
|
278 |
throws SerialException, SQLException { |
|
279 |
return position(pattern.getBytes(1, (int)(pattern.length())), start); |
|
280 |
} |
|
281 |
||
282 |
/** |
|
283 |
* Writes the given array of bytes to the <code>BLOB</code> value that |
|
284 |
* this <code>Blob</code> object represents, starting at position |
|
285 |
* <code>pos</code>, and returns the number of bytes written. |
|
286 |
* |
|
287 |
* @param pos the position in the SQL <code>BLOB</code> value at which |
|
288 |
* to start writing. The first position is <code>1</code>; |
|
289 |
* must not be less than <code>1</code> nor greater than |
|
290 |
* the length of this <code>SerialBlob</code> object. |
|
291 |
* @param bytes the array of bytes to be written to the <code>BLOB</code> |
|
292 |
* value that this <code>Blob</code> object represents |
|
293 |
* @return the number of bytes written |
|
294 |
* @throws SerialException if there is an error accessing the |
|
295 |
* <code>BLOB</code> value; or if an invalid position is set; if an |
|
296 |
* invalid offset value is set |
|
297 |
* @throws SQLException if there is an error accessing the <code>BLOB</code> |
|
298 |
* value from the database |
|
299 |
* @see #getBytes |
|
300 |
*/ |
|
301 |
public int setBytes(long pos, byte[] bytes) |
|
302 |
throws SerialException, SQLException { |
|
303 |
return (setBytes(pos, bytes, 0, bytes.length)); |
|
304 |
} |
|
305 |
||
306 |
/** |
|
307 |
* Writes all or part of the given <code>byte</code> array to the |
|
308 |
* <code>BLOB</code> value that this <code>Blob</code> object represents |
|
309 |
* and returns the number of bytes written. |
|
310 |
* Writing starts at position <code>pos</code> in the <code>BLOB</code> |
|
311 |
* value; <i>len</i> bytes from the given byte array are written. |
|
312 |
* |
|
313 |
* @param pos the position in the <code>BLOB</code> object at which |
|
314 |
* to start writing. The first position is <code>1</code>; |
|
315 |
* must not be less than <code>1</code> nor greater than |
|
316 |
* the length of this <code>SerialBlob</code> object. |
|
317 |
* @param bytes the array of bytes to be written to the <code>BLOB</code> |
|
318 |
* value |
|
319 |
* @param offset the offset in the <code>byte</code> array at which |
|
320 |
* to start reading the bytes. The first offset position is |
|
321 |
* <code>0</code>; must not be less than <code>0</code> nor greater |
|
322 |
* than the length of the <code>byte</code> array |
|
323 |
* @param length the number of bytes to be written to the |
|
324 |
* <code>BLOB</code> value from the array of bytes <i>bytes</i>. |
|
325 |
* |
|
326 |
* @return the number of bytes written |
|
327 |
* @throws SerialException if there is an error accessing the |
|
328 |
* <code>BLOB</code> value; if an invalid position is set; if an |
|
329 |
* invalid offset value is set; if number of bytes to be written |
|
330 |
* is greater than the <code>SerialBlob</code> length; or the combined |
|
331 |
* values of the length and offset is greater than the Blob buffer |
|
332 |
* @throws SQLException if there is an error accessing the <code>BLOB</code> |
|
333 |
* value from the database. |
|
334 |
* @see #getBytes |
|
335 |
*/ |
|
336 |
public int setBytes(long pos, byte[] bytes, int offset, int length) |
|
337 |
throws SerialException, SQLException { |
|
338 |
||
339 |
if (offset < 0 || offset > bytes.length) { |
|
340 |
throw new SerialException("Invalid offset in byte array set"); |
|
341 |
} |
|
342 |
||
343 |
if (pos < 1 || pos > this.length()) { |
|
344 |
throw new SerialException("Invalid position in BLOB object set"); |
|
345 |
} |
|
346 |
||
347 |
if ((long)(length) > origLen) { |
|
348 |
throw new SerialException("Buffer is not sufficient to hold the value"); |
|
349 |
} |
|
350 |
||
351 |
if ((length + offset) > bytes.length) { |
|
352 |
throw new SerialException("Invalid OffSet. Cannot have combined offset " + |
|
353 |
"and length that is greater that the Blob buffer"); |
|
354 |
} |
|
355 |
||
356 |
int i = 0; |
|
357 |
pos--; // correct to array indexing |
|
358 |
while ( i < length || (offset + i +1) < (bytes.length-offset) ) { |
|
359 |
this.buf[(int)pos + i] = bytes[offset + i ]; |
|
360 |
i++; |
|
361 |
} |
|
362 |
return i; |
|
363 |
} |
|
364 |
||
365 |
/** |
|
366 |
* Retrieves a stream that can be used to write to the <code>BLOB</code> |
|
367 |
* value that this <code>Blob</code> object represents. The stream begins |
|
368 |
* at position <code>pos</code>. This method forwards the |
|
369 |
* <code>setBinaryStream()</code> call to the underlying <code>Blob</code> in |
|
370 |
* the event that this <code>SerialBlob</code> object is instantiated with a |
|
371 |
* <code>Blob</code>. If this <code>SerialBlob</code> is instantiated with |
|
372 |
* a <code>byte</code> array, a <code>SerialException</code> is thrown. |
|
373 |
* |
|
374 |
* @param pos the position in the <code>BLOB</code> value at which |
|
375 |
* to start writing |
|
376 |
* @return a <code>java.io.OutputStream</code> object to which data can |
|
377 |
* be written |
|
378 |
* @throws SQLException if there is an error accessing the |
|
379 |
* <code>BLOB</code> value |
|
380 |
* @throws SerialException if the SerialBlob in not instantiated with a |
|
381 |
* <code>Blob</code> object that supports <code>setBinaryStream()</code> |
|
382 |
* @see #getBinaryStream |
|
383 |
*/ |
|
384 |
public java.io.OutputStream setBinaryStream(long pos) |
|
385 |
throws SerialException, SQLException { |
|
10323
48d695d1e966
7077451: SerialLob, SerialClob have the wrong checks for setStream methods
lancea
parents:
7544
diff
changeset
|
386 |
if (this.blob != null) { |
2 | 387 |
return this.blob.setBinaryStream(pos); |
388 |
} else { |
|
389 |
throw new SerialException("Unsupported operation. SerialBlob cannot " + |
|
390 |
"return a writable binary stream, unless instantiated with a Blob object " + |
|
391 |
"that provides a setBinaryStream() implementation"); |
|
392 |
} |
|
393 |
} |
|
394 |
||
395 |
/** |
|
396 |
* Truncates the <code>BLOB</code> value that this <code>Blob</code> |
|
397 |
* object represents to be <code>len</code> bytes in length. |
|
398 |
* |
|
399 |
* @param length the length, in bytes, to which the <code>BLOB</code> |
|
400 |
* value that this <code>Blob</code> object represents should be |
|
401 |
* truncated |
|
402 |
* @throws SerialException if there is an error accessing the Blob value; |
|
403 |
* or the length to truncate is greater that the SerialBlob length |
|
404 |
*/ |
|
405 |
public void truncate(long length) throws SerialException { |
|
406 |
||
407 |
if (length > len) { |
|
408 |
throw new SerialException |
|
409 |
("Length more than what can be truncated"); |
|
410 |
} else if((int)length == 0) { |
|
411 |
buf = new byte[0]; |
|
412 |
len = length; |
|
413 |
} else { |
|
414 |
len = length; |
|
415 |
buf = this.getBytes(1, (int)len); |
|
416 |
} |
|
417 |
} |
|
418 |
||
419 |
||
420 |
/** |
|
421 |
* Returns an <code>InputStream</code> object that contains a partial <code>Blob</code> value, |
|
422 |
* starting with the byte specified by pos, which is length bytes in length. |
|
423 |
* |
|
424 |
* @param pos the offset to the first byte of the partial value to be retrieved. |
|
425 |
* The first byte in the <code>Blob</code> is at position 1 |
|
426 |
* @param length the length in bytes of the partial value to be retrieved |
|
427 |
* @return <code>InputStream</code> through which the partial <code>Blob</code> value can be read. |
|
428 |
* @throws SQLException if pos is less than 1 or if pos is greater than the number of bytes |
|
429 |
* in the <code>Blob</code> or if pos + length is greater than the number of bytes |
|
430 |
* in the <code>Blob</code> |
|
431 |
* |
|
432 |
* @since 1.6 |
|
433 |
*/ |
|
434 |
public InputStream getBinaryStream(long pos,long length) throws SQLException { |
|
435 |
throw new java.lang.UnsupportedOperationException("Not supported"); |
|
436 |
} |
|
437 |
||
438 |
||
439 |
/** |
|
440 |
* This method frees the <code>Blob</code> object and releases the resources that it holds. |
|
441 |
* <code>Blob</code> object. The object is invalid once the <code>free</code> |
|
442 |
* method is called. If <code>free</code> is called multiple times, the subsequent |
|
443 |
* calls to <code>free</code> are treated as a no-op. |
|
444 |
* |
|
445 |
* @throws SQLException if an error occurs releasing |
|
446 |
* the Blob's resources |
|
447 |
* @since 1.6 |
|
448 |
*/ |
|
449 |
public void free() throws SQLException { |
|
450 |
throw new java.lang.UnsupportedOperationException("Not supported"); |
|
451 |
} |
|
14337
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
452 |
|
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
453 |
/** |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
454 |
* Compares this SerialBlob to the specified object. The result is {@code |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
455 |
* true} if and only if the argument is not {@code null} and is a {@code |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
456 |
* SerialBlob} object that represents the same sequence of bytes as this |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
457 |
* object. |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
458 |
* |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
459 |
* @param obj The object to compare this {@code SerialBlob} against |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
460 |
* |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
461 |
* @return {@code true} if the given object represents a {@code SerialBlob} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
462 |
* equivalent to this SerialBlob, {@code false} otherwise |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
463 |
* |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
464 |
*/ |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
465 |
public boolean equals(Object obj) { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
466 |
if (this == obj) { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
467 |
return true; |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
468 |
} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
469 |
if (obj instanceof SerialBlob) { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
470 |
SerialBlob sb = (SerialBlob)obj; |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
471 |
if (this.len == sb.len) { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
472 |
return Arrays.equals(buf, sb.buf); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
473 |
} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
474 |
} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
475 |
return false; |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
476 |
} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
477 |
|
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
478 |
/** |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
479 |
* Returns a hash code for this {@code SerialBlob}. |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
480 |
* @return a hash code value for this object. |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
481 |
*/ |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
482 |
public int hashCode() { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
483 |
return ((31 + Arrays.hashCode(buf)) * 31 + (int)len) * 31 + (int)origLen; |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
484 |
} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
485 |
|
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
486 |
/** |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
487 |
* Returns a clone of this {@code SerialBlob}. The copy will contain a |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
488 |
* reference to a clone of the internal byte array, not a reference |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
489 |
* to the original internal byte array of this {@code SerialBlob} object. |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
490 |
* The underlying {@code Blob} object will be set to null. |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
491 |
* |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
492 |
* @return a clone of this SerialBlob |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
493 |
*/ |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
494 |
public Object clone() { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
495 |
try { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
496 |
SerialBlob sb = (SerialBlob) super.clone(); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
497 |
sb.buf = Arrays.copyOf(buf, (int)len); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
498 |
sb.blob = null; |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
499 |
return sb; |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
500 |
} catch (CloneNotSupportedException ex) { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
501 |
// this shouldn't happen, since we are Cloneable |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
502 |
throw new InternalError(); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
503 |
} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
504 |
|
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
505 |
} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
506 |
|
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
507 |
/** |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
508 |
* readObject is called to restore the state of the SerialBlob from |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
509 |
* a stream. |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
510 |
*/ |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
511 |
private void readObject(ObjectInputStream s) |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
512 |
throws IOException, ClassNotFoundException { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
513 |
|
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
514 |
ObjectInputStream.GetField fields = s.readFields(); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
515 |
byte[] tmp = (byte[])fields.get("buf", null); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
516 |
if (tmp == null) |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
517 |
throw new InvalidObjectException("buf is null and should not be!"); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
518 |
buf = tmp.clone(); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
519 |
len = fields.get("len", 0L); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
520 |
if (buf.length != len) |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
521 |
throw new InvalidObjectException("buf is not the expected size"); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
522 |
origLen = fields.get("origLen", 0L); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
523 |
blob = (Blob) fields.get("blob", null); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
524 |
} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
525 |
|
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
526 |
/** |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
527 |
* writeObject is called to save the state of the SerialBlob |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
528 |
* to a stream. |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
529 |
*/ |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
530 |
private void writeObject(ObjectOutputStream s) |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
531 |
throws IOException, ClassNotFoundException { |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
532 |
|
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
533 |
ObjectOutputStream.PutField fields = s.putFields(); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
534 |
fields.put("buf", buf); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
535 |
fields.put("len", len); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
536 |
fields.put("origLen", origLen); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
537 |
// Note: this check to see if it is an instance of Serializable |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
538 |
// is for backwards compatibiity |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
539 |
fields.put("blob", blob instanceof Serializable ? blob : null); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
540 |
s.writeFields(); |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
541 |
} |
a003c6a54cb6
8001536: Added readObject,writeObject,clone, equals, hashcode to SerialXLob
lancea
parents:
11129
diff
changeset
|
542 |
|
2 | 543 |
/** |
544 |
* The identifier that assists in the serialization of this <code>SerialBlob</code> |
|
545 |
* object. |
|
546 |
*/ |
|
547 |
||
548 |
static final long serialVersionUID = -8144641928112860441L; |
|
549 |
} |