1 /*
2 * Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved.
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
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
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 *
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
2258
2259 if (entry instanceof FieldReflector) {
2260 return (FieldReflector) entry;
2261 } else if (entry instanceof InvalidClassException) {
2262 throw (InvalidClassException) entry;
2263 } else if (entry instanceof RuntimeException) {
2264 throw (RuntimeException) entry;
2265 } else if (entry instanceof Error) {
2266 throw (Error) entry;
2267 } else {
2268 throw new InternalError("unexpected entry: " + entry);
2269 }
2270 }
2271
2272 /**
2273 * FieldReflector cache lookup key. Keys are considered equal if they
2274 * refer to the same class and equivalent field formats.
2275 */
2276 private static class FieldReflectorKey extends WeakReference<Class<?>> {
2277
2278 private final String sigs;
2279 private final int hash;
2280 private final boolean nullClass;
2281
2282 FieldReflectorKey(Class<?> cl, ObjectStreamField[] fields,
2283 ReferenceQueue<Class<?>> queue)
2284 {
2285 super(cl, queue);
2286 nullClass = (cl == null);
2287 StringBuilder sbuf = new StringBuilder();
2288 for (int i = 0; i < fields.length; i++) {
2289 ObjectStreamField f = fields[i];
2290 sbuf.append(f.getName()).append(f.getSignature());
2291 }
2292 sigs = sbuf.toString();
2293 hash = System.identityHashCode(cl) + sigs.hashCode();
2294 }
2295
2296 public int hashCode() {
2297 return hash;
2298 }
2299
2300 public boolean equals(Object obj) {
2301 if (obj == this) {
2302 return true;
2303 }
2304
2305 if (obj instanceof FieldReflectorKey) {
2306 FieldReflectorKey other = (FieldReflectorKey) obj;
2307 Class<?> referent;
2308 return (nullClass ? other.nullClass
2309 : ((referent = get()) != null) &&
2310 (referent == other.get())) &&
2311 sigs.equals(other.sigs);
2312 } else {
2313 return false;
2314 }
2315 }
2316 }
2317
2318 /**
2319 * Matches given set of serializable fields with serializable fields
2320 * obtained from the given local class descriptor (which contain bindings
2321 * to reflective Field objects). Returns list of ObjectStreamFields in
2322 * which each ObjectStreamField whose signature matches that of a local
2323 * field contains a Field object for that field; unmatched
2324 * ObjectStreamFields contain null Field objects. Shared/unshared settings
2325 * of the returned ObjectStreamFields also reflect those of matched local
2326 * ObjectStreamFields. Throws InvalidClassException if unresolvable type
2327 * conflicts exist between the two sets of fields.
2328 */
2329 private static ObjectStreamField[] matchFields(ObjectStreamField[] fields,
2330 ObjectStreamClass localDesc)
2331 throws InvalidClassException
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1 /*
2 * Copyright (c) 1996, 2019, Oracle and/or its affiliates. All rights reserved.
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
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
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 *
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
2258
2259 if (entry instanceof FieldReflector) {
2260 return (FieldReflector) entry;
2261 } else if (entry instanceof InvalidClassException) {
2262 throw (InvalidClassException) entry;
2263 } else if (entry instanceof RuntimeException) {
2264 throw (RuntimeException) entry;
2265 } else if (entry instanceof Error) {
2266 throw (Error) entry;
2267 } else {
2268 throw new InternalError("unexpected entry: " + entry);
2269 }
2270 }
2271
2272 /**
2273 * FieldReflector cache lookup key. Keys are considered equal if they
2274 * refer to the same class and equivalent field formats.
2275 */
2276 private static class FieldReflectorKey extends WeakReference<Class<?>> {
2277
2278 private final String[] sigs;
2279 private final int hash;
2280 private final boolean nullClass;
2281
2282 FieldReflectorKey(Class<?> cl, ObjectStreamField[] fields,
2283 ReferenceQueue<Class<?>> queue)
2284 {
2285 super(cl, queue);
2286 nullClass = (cl == null);
2287 sigs = new String[2 * fields.length];
2288 for (int i = 0; i < fields.length; i++) {
2289 ObjectStreamField f = fields[i];
2290 sigs[2 * i] = f.getName();
2291 sigs[2 * i + 1] = f.getSignature();
2292 }
2293 hash = System.identityHashCode(cl) + Arrays.hashCode(sigs);
2294 }
2295
2296 public int hashCode() {
2297 return hash;
2298 }
2299
2300 public boolean equals(Object obj) {
2301 if (obj == this) {
2302 return true;
2303 }
2304
2305 if (obj instanceof FieldReflectorKey) {
2306 FieldReflectorKey other = (FieldReflectorKey) obj;
2307 Class<?> referent;
2308 return (nullClass ? other.nullClass
2309 : ((referent = get()) != null) &&
2310 (referent == other.get())) &&
2311 Arrays.equals(sigs, other.sigs);
2312 } else {
2313 return false;
2314 }
2315 }
2316 }
2317
2318 /**
2319 * Matches given set of serializable fields with serializable fields
2320 * obtained from the given local class descriptor (which contain bindings
2321 * to reflective Field objects). Returns list of ObjectStreamFields in
2322 * which each ObjectStreamField whose signature matches that of a local
2323 * field contains a Field object for that field; unmatched
2324 * ObjectStreamFields contain null Field objects. Shared/unshared settings
2325 * of the returned ObjectStreamFields also reflect those of matched local
2326 * ObjectStreamFields. Throws InvalidClassException if unresolvable type
2327 * conflicts exist between the two sets of fields.
2328 */
2329 private static ObjectStreamField[] matchFields(ObjectStreamField[] fields,
2330 ObjectStreamClass localDesc)
2331 throws InvalidClassException
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