1304 * @throws IllegalArgumentException if arrayType isn't actually an array type
1305 * @throws NegativeArraySizeException if arrayLength is negative
1306 * @throws InvalidClassException if the filter rejects creation
1307 */
1308 private void checkArray(Class<?> arrayType, int arrayLength) throws InvalidClassException {
1309 if (! arrayType.isArray()) {
1310 throw new IllegalArgumentException("not an array type");
1311 }
1312
1313 if (arrayLength < 0) {
1314 throw new NegativeArraySizeException();
1315 }
1316
1317 filterCheck(arrayType, arrayLength);
1318 }
1319
1320 /**
1321 * Provide access to the persistent fields read from the input stream.
1322 */
1323 public abstract static class GetField {
1324
1325 /**
1326 * Get the ObjectStreamClass that describes the fields in the stream.
1327 *
1328 * @return the descriptor class that describes the serializable fields
1329 */
1330 public abstract ObjectStreamClass getObjectStreamClass();
1331
1332 /**
1333 * Return true if the named field is defaulted and has no value in this
1334 * stream.
1335 *
1336 * @param name the name of the field
1337 * @return true, if and only if the named field is defaulted
1338 * @throws IOException if there are I/O errors while reading from
1339 * the underlying <code>InputStream</code>
1340 * @throws IllegalArgumentException if <code>name</code> does not
1341 * correspond to a serializable field
1342 */
1343 public abstract boolean defaulted(String name) throws IOException;
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1304 * @throws IllegalArgumentException if arrayType isn't actually an array type
1305 * @throws NegativeArraySizeException if arrayLength is negative
1306 * @throws InvalidClassException if the filter rejects creation
1307 */
1308 private void checkArray(Class<?> arrayType, int arrayLength) throws InvalidClassException {
1309 if (! arrayType.isArray()) {
1310 throw new IllegalArgumentException("not an array type");
1311 }
1312
1313 if (arrayLength < 0) {
1314 throw new NegativeArraySizeException();
1315 }
1316
1317 filterCheck(arrayType, arrayLength);
1318 }
1319
1320 /**
1321 * Provide access to the persistent fields read from the input stream.
1322 */
1323 public abstract static class GetField {
1324 /**
1325 * Constructor for subclasses to call.
1326 */
1327 public GetField() {}
1328
1329 /**
1330 * Get the ObjectStreamClass that describes the fields in the stream.
1331 *
1332 * @return the descriptor class that describes the serializable fields
1333 */
1334 public abstract ObjectStreamClass getObjectStreamClass();
1335
1336 /**
1337 * Return true if the named field is defaulted and has no value in this
1338 * stream.
1339 *
1340 * @param name the name of the field
1341 * @return true, if and only if the named field is defaulted
1342 * @throws IOException if there are I/O errors while reading from
1343 * the underlying <code>InputStream</code>
1344 * @throws IllegalArgumentException if <code>name</code> does not
1345 * correspond to a serializable field
1346 */
1347 public abstract boolean defaulted(String name) throws IOException;
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