1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/corba/se/impl/io/ObjectStreamClass.java Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,1836 @@
1.4 +/*
1.5 + * Copyright 1998-2004 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Sun designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Sun in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.25 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.26 + * have any questions.
1.27 + */
1.28 +/*
1.29 + * Licensed Materials - Property of IBM
1.30 + * RMI-IIOP v1.0
1.31 + * Copyright IBM Corp. 1998 1999 All Rights Reserved
1.32 + *
1.33 + */
1.34 +
1.35 +package com.sun.corba.se.impl.io;
1.36 +
1.37 +import java.security.MessageDigest;
1.38 +import java.security.NoSuchAlgorithmException;
1.39 +import java.security.DigestOutputStream;
1.40 +import java.security.AccessController;
1.41 +import java.security.PrivilegedExceptionAction;
1.42 +import java.security.PrivilegedActionException;
1.43 +import java.security.PrivilegedAction;
1.44 +
1.45 +import java.lang.reflect.Modifier;
1.46 +import java.lang.reflect.Array;
1.47 +import java.lang.reflect.Field;
1.48 +import java.lang.reflect.Member;
1.49 +import java.lang.reflect.Method;
1.50 +import java.lang.reflect.Constructor;
1.51 +import java.lang.reflect.Proxy;
1.52 +import java.lang.reflect.InvocationTargetException;
1.53 +
1.54 +import java.io.IOException;
1.55 +import java.io.DataOutputStream;
1.56 +import java.io.ByteArrayOutputStream;
1.57 +import java.io.InvalidClassException;
1.58 +import java.io.Serializable;
1.59 +
1.60 +import java.util.Arrays;
1.61 +import java.util.Comparator;
1.62 +import java.util.Hashtable;
1.63 +
1.64 +import com.sun.corba.se.impl.util.RepositoryId;
1.65 +
1.66 +import org.omg.CORBA.ValueMember;
1.67 +
1.68 +import sun.corba.Bridge;
1.69 +
1.70 +/**
1.71 + * A ObjectStreamClass describes a class that can be serialized to a stream
1.72 + * or a class that was serialized to a stream. It contains the name
1.73 + * and the serialVersionUID of the class.
1.74 + * <br>
1.75 + * The ObjectStreamClass for a specific class loaded in this Java VM can
1.76 + * be found using the lookup method.
1.77 + *
1.78 + * @author Roger Riggs
1.79 + * @since JDK1.1
1.80 + */
1.81 +public class ObjectStreamClass implements java.io.Serializable {
1.82 + private static final boolean DEBUG_SVUID = false ;
1.83 +
1.84 + public static final long kDefaultUID = -1;
1.85 +
1.86 + private static Object noArgsList[] = {};
1.87 + private static Class noTypesList[] = {};
1.88 +
1.89 + private static Hashtable translatedFields;
1.90 +
1.91 + private static final Bridge bridge =
1.92 + (Bridge)AccessController.doPrivileged(
1.93 + new PrivilegedAction() {
1.94 + public Object run() {
1.95 + return Bridge.get() ;
1.96 + }
1.97 + }
1.98 + ) ;
1.99 +
1.100 + /** Find the descriptor for a class that can be serialized. Null
1.101 + * is returned if the specified class does not implement
1.102 + * java.io.Serializable or java.io.Externalizable.
1.103 + */
1.104 + static final ObjectStreamClass lookup(Class cl)
1.105 + {
1.106 + ObjectStreamClass desc = lookupInternal(cl);
1.107 + if (desc.isSerializable() || desc.isExternalizable())
1.108 + return desc;
1.109 + return null;
1.110 + }
1.111 +
1.112 + /*
1.113 + * Find the class descriptor for the specified class.
1.114 + * Package access only so it can be called from ObjectIn/OutStream.
1.115 + */
1.116 + static ObjectStreamClass lookupInternal(Class cl)
1.117 + {
1.118 + /* Synchronize on the hashtable so no two threads will do
1.119 + * this at the same time.
1.120 + */
1.121 + ObjectStreamClass desc = null;
1.122 + synchronized (descriptorFor) {
1.123 + /* Find the matching descriptor if it already known */
1.124 + desc = findDescriptorFor(cl);
1.125 + if (desc == null) {
1.126 + /* Check if it's serializable */
1.127 + boolean serializable = classSerializable.isAssignableFrom(cl);
1.128 +
1.129 + /* If the class is only Serializable,
1.130 + * lookup the descriptor for the superclass.
1.131 + */
1.132 + ObjectStreamClass superdesc = null;
1.133 + if (serializable) {
1.134 + Class superclass = cl.getSuperclass();
1.135 + if (superclass != null)
1.136 + superdesc = lookup(superclass);
1.137 + }
1.138 +
1.139 + /* Check if its' externalizable.
1.140 + * If it's Externalizable, clear the serializable flag.
1.141 + * Only one or the other may be set in the protocol.
1.142 + */
1.143 + boolean externalizable = false;
1.144 + if (serializable) {
1.145 + externalizable =
1.146 + ((superdesc != null) && superdesc.isExternalizable()) ||
1.147 + classExternalizable.isAssignableFrom(cl);
1.148 + if (externalizable) {
1.149 + serializable = false;
1.150 + }
1.151 + }
1.152 +
1.153 + /* Create a new version descriptor,
1.154 + * it put itself in the known table.
1.155 + */
1.156 + desc = new ObjectStreamClass(cl, superdesc,
1.157 + serializable, externalizable);
1.158 + }
1.159 + }
1.160 +
1.161 + // Must always call init. See bug 4488137. This code was
1.162 + // incorrectly changed to return immediately on a non-null
1.163 + // cache result. That allowed threads to gain access to
1.164 + // unintialized instances.
1.165 + //
1.166 + // All threads must sync on the member variable lock
1.167 + // and check the initialization state.
1.168 + //
1.169 + // Another possibility is to continue to synchronize on the
1.170 + // descriptorFor array, but that leads to poor performance
1.171 + // (see bug 4165204 "ObjectStreamClass can hold global lock
1.172 + // for a very long time").
1.173 + desc.init();
1.174 +
1.175 + return desc;
1.176 + }
1.177 +
1.178 + /**
1.179 + * The name of the class described by this descriptor.
1.180 + */
1.181 + public final String getName() {
1.182 + return name;
1.183 + }
1.184 +
1.185 + /**
1.186 + * Return the serialVersionUID for this class.
1.187 + * The serialVersionUID defines a set of classes all with the same name
1.188 + * that have evolved from a common root class and agree to be serialized
1.189 + * and deserialized using a common format.
1.190 + */
1.191 + public static final long getSerialVersionUID( java.lang.Class clazz) {
1.192 + ObjectStreamClass theosc = ObjectStreamClass.lookup( clazz );
1.193 + if( theosc != null )
1.194 + {
1.195 + return theosc.getSerialVersionUID( );
1.196 + }
1.197 + return 0;
1.198 + }
1.199 +
1.200 + /**
1.201 + * Return the serialVersionUID for this class.
1.202 + * The serialVersionUID defines a set of classes all with the same name
1.203 + * that have evolved from a common root class and agree to be serialized
1.204 + * and deserialized using a common format.
1.205 + */
1.206 + public final long getSerialVersionUID() {
1.207 + return suid;
1.208 + }
1.209 +
1.210 + /**
1.211 + * Return the serialVersionUID string for this class.
1.212 + * The serialVersionUID defines a set of classes all with the same name
1.213 + * that have evolved from a common root class and agree to be serialized
1.214 + * and deserialized using a common format.
1.215 + */
1.216 + public final String getSerialVersionUIDStr() {
1.217 + if (suidStr == null)
1.218 + suidStr = Long.toHexString(suid).toUpperCase();
1.219 + return suidStr;
1.220 + }
1.221 +
1.222 + /**
1.223 + * Return the actual (computed) serialVersionUID for this class.
1.224 + */
1.225 + public static final long getActualSerialVersionUID( java.lang.Class clazz )
1.226 + {
1.227 + ObjectStreamClass theosc = ObjectStreamClass.lookup( clazz );
1.228 + if( theosc != null )
1.229 + {
1.230 + return theosc.getActualSerialVersionUID( );
1.231 + }
1.232 + return 0;
1.233 + }
1.234 +
1.235 + /**
1.236 + * Return the actual (computed) serialVersionUID for this class.
1.237 + */
1.238 + public final long getActualSerialVersionUID() {
1.239 + return actualSuid;
1.240 + }
1.241 +
1.242 + /**
1.243 + * Return the actual (computed) serialVersionUID for this class.
1.244 + */
1.245 + public final String getActualSerialVersionUIDStr() {
1.246 + if (actualSuidStr == null)
1.247 + actualSuidStr = Long.toHexString(actualSuid).toUpperCase();
1.248 + return actualSuidStr;
1.249 + }
1.250 +
1.251 + /**
1.252 + * Return the class in the local VM that this version is mapped to.
1.253 + * Null is returned if there is no corresponding local class.
1.254 + */
1.255 + public final Class forClass() {
1.256 + return ofClass;
1.257 + }
1.258 +
1.259 + /**
1.260 + * Return an array of the fields of this serializable class.
1.261 + * @return an array containing an element for each persistent
1.262 + * field of this class. Returns an array of length zero if
1.263 + * there are no fields.
1.264 + * @since JDK1.2
1.265 + */
1.266 + public ObjectStreamField[] getFields() {
1.267 + // Return a copy so the caller can't change the fields.
1.268 + if (fields.length > 0) {
1.269 + ObjectStreamField[] dup = new ObjectStreamField[fields.length];
1.270 + System.arraycopy(fields, 0, dup, 0, fields.length);
1.271 + return dup;
1.272 + } else {
1.273 + return fields;
1.274 + }
1.275 + }
1.276 +
1.277 + public boolean hasField(ValueMember field)
1.278 + {
1.279 + try {
1.280 + for (int i = 0; i < fields.length; i++) {
1.281 + if (fields[i].getName().equals(field.name)) {
1.282 + if (fields[i].getSignature().equals(
1.283 + ValueUtility.getSignature(field)))
1.284 + return true;
1.285 + }
1.286 + }
1.287 + } catch (Exception exc) {
1.288 + // Ignore this; all we want to do is return false
1.289 + // Note that ValueUtility.getSignature can throw checked exceptions.
1.290 + }
1.291 +
1.292 + return false;
1.293 + }
1.294 +
1.295 + /* Avoid unnecessary allocations. */
1.296 + final ObjectStreamField[] getFieldsNoCopy() {
1.297 + return fields;
1.298 + }
1.299 +
1.300 + /**
1.301 + * Get the field of this class by name.
1.302 + * @return The ObjectStreamField object of the named field or null if there
1.303 + * is no such named field.
1.304 + */
1.305 + public final ObjectStreamField getField(String name) {
1.306 + /* Binary search of fields by name.
1.307 + */
1.308 + for (int i = fields.length-1; i >= 0; i--) {
1.309 + if (name.equals(fields[i].getName())) {
1.310 + return fields[i];
1.311 + }
1.312 + }
1.313 + return null;
1.314 + }
1.315 +
1.316 + public Serializable writeReplace(Serializable value) {
1.317 + if (writeReplaceObjectMethod != null) {
1.318 + try {
1.319 + return (Serializable) writeReplaceObjectMethod.invoke(value,noArgsList);
1.320 + } catch(Throwable t) {
1.321 + throw new RuntimeException(t);
1.322 + }
1.323 + }
1.324 + else return value;
1.325 + }
1.326 +
1.327 + public Object readResolve(Object value) {
1.328 + if (readResolveObjectMethod != null) {
1.329 + try {
1.330 + return readResolveObjectMethod.invoke(value,noArgsList);
1.331 + } catch(Throwable t) {
1.332 + throw new RuntimeException(t);
1.333 + }
1.334 + }
1.335 + else return value;
1.336 + }
1.337 +
1.338 + /**
1.339 + * Return a string describing this ObjectStreamClass.
1.340 + */
1.341 + public final String toString() {
1.342 + StringBuffer sb = new StringBuffer();
1.343 +
1.344 + sb.append(name);
1.345 + sb.append(": static final long serialVersionUID = ");
1.346 + sb.append(Long.toString(suid));
1.347 + sb.append("L;");
1.348 + return sb.toString();
1.349 + }
1.350 +
1.351 + /*
1.352 + * Create a new ObjectStreamClass from a loaded class.
1.353 + * Don't call this directly, call lookup instead.
1.354 + */
1.355 + private ObjectStreamClass(java.lang.Class cl, ObjectStreamClass superdesc,
1.356 + boolean serial, boolean extern)
1.357 + {
1.358 + ofClass = cl; /* created from this class */
1.359 +
1.360 + if (Proxy.isProxyClass(cl)) {
1.361 + forProxyClass = true;
1.362 + }
1.363 +
1.364 + name = cl.getName();
1.365 + superclass = superdesc;
1.366 + serializable = serial;
1.367 + if (!forProxyClass) {
1.368 + // proxy classes are never externalizable
1.369 + externalizable = extern;
1.370 + }
1.371 +
1.372 + /*
1.373 + * Enter this class in the table of known descriptors.
1.374 + * Otherwise, when the fields are read it may recurse
1.375 + * trying to find the descriptor for itself.
1.376 + */
1.377 + insertDescriptorFor(this);
1.378 +
1.379 + /*
1.380 + * The remainder of initialization occurs in init(), which is called
1.381 + * after the lock on the global class descriptor table has been
1.382 + * released.
1.383 + */
1.384 + }
1.385 +
1.386 + /*
1.387 + * Initialize class descriptor. This method is only invoked on class
1.388 + * descriptors created via calls to lookupInternal(). This method is kept
1.389 + * separate from the ObjectStreamClass constructor so that lookupInternal
1.390 + * does not have to hold onto a global class descriptor table lock while the
1.391 + * class descriptor is being initialized (see bug 4165204).
1.392 + */
1.393 +
1.394 +
1.395 + private void init() {
1.396 + synchronized (lock) {
1.397 +
1.398 + // See description at definition of initialized.
1.399 + if (initialized)
1.400 + return;
1.401 +
1.402 + final Class cl = ofClass;
1.403 +
1.404 + if (!serializable ||
1.405 + externalizable ||
1.406 + forProxyClass ||
1.407 + name.equals("java.lang.String")) {
1.408 + fields = NO_FIELDS;
1.409 + } else if (serializable) {
1.410 + /* Ask for permission to override field access checks.
1.411 + */
1.412 + AccessController.doPrivileged(new PrivilegedAction() {
1.413 + public Object run() {
1.414 + /* Fill in the list of persistent fields.
1.415 + * If it is declared, use the declared serialPersistentFields.
1.416 + * Otherwise, extract the fields from the class itself.
1.417 + */
1.418 + try {
1.419 + Field pf = cl.getDeclaredField("serialPersistentFields");
1.420 + // serial bug 7; the serialPersistentFields were not
1.421 + // being read and stored as Accessible bit was not set
1.422 + pf.setAccessible(true);
1.423 + // serial bug 7; need to find if the field is of type
1.424 + // java.io.ObjectStreamField
1.425 + java.io.ObjectStreamField[] f =
1.426 + (java.io.ObjectStreamField[])pf.get(cl);
1.427 + int mods = pf.getModifiers();
1.428 + if ((Modifier.isPrivate(mods)) &&
1.429 + (Modifier.isStatic(mods)) &&
1.430 + (Modifier.isFinal(mods)))
1.431 + {
1.432 + fields = (ObjectStreamField[])translateFields((Object[])pf.get(cl));
1.433 + }
1.434 + } catch (NoSuchFieldException e) {
1.435 + fields = null;
1.436 + } catch (IllegalAccessException e) {
1.437 + fields = null;
1.438 + } catch (IllegalArgumentException e) {
1.439 + fields = null;
1.440 + } catch (ClassCastException e) {
1.441 + /* Thrown if a field serialPersistentField exists
1.442 + * but it is not of type ObjectStreamField.
1.443 + */
1.444 + fields = null;
1.445 + }
1.446 +
1.447 +
1.448 + if (fields == null) {
1.449 + /* Get all of the declared fields for this
1.450 + * Class. setAccessible on all fields so they
1.451 + * can be accessed later. Create a temporary
1.452 + * ObjectStreamField array to hold each
1.453 + * non-static, non-transient field. Then copy the
1.454 + * temporary array into an array of the correct
1.455 + * size once the number of fields is known.
1.456 + */
1.457 + Field[] actualfields = cl.getDeclaredFields();
1.458 +
1.459 + int numFields = 0;
1.460 + ObjectStreamField[] tempFields =
1.461 + new ObjectStreamField[actualfields.length];
1.462 + for (int i = 0; i < actualfields.length; i++) {
1.463 + Field fld = actualfields[i] ;
1.464 + int modifiers = fld.getModifiers();
1.465 + if (!Modifier.isStatic(modifiers) &&
1.466 + !Modifier.isTransient(modifiers)) {
1.467 + fld.setAccessible(true) ;
1.468 + tempFields[numFields++] = new ObjectStreamField(fld);
1.469 + }
1.470 + }
1.471 +
1.472 + fields = new ObjectStreamField[numFields];
1.473 + System.arraycopy(tempFields, 0, fields, 0, numFields);
1.474 +
1.475 + } else {
1.476 + // For each declared persistent field, look for an actual
1.477 + // reflected Field. If there is one, make sure it's the correct
1.478 + // type and cache it in the ObjectStreamClass for that field.
1.479 + for (int j = fields.length-1; j >= 0; j--) {
1.480 + try {
1.481 + Field reflField = cl.getDeclaredField(fields[j].getName());
1.482 + if (fields[j].getType() == reflField.getType()) {
1.483 + reflField.setAccessible(true);
1.484 + fields[j].setField(reflField);
1.485 + }
1.486 + } catch (NoSuchFieldException e) {
1.487 + // Nothing to do
1.488 + }
1.489 + }
1.490 + }
1.491 + return null;
1.492 + }
1.493 + });
1.494 +
1.495 + if (fields.length > 1)
1.496 + Arrays.sort(fields);
1.497 +
1.498 + /* Set up field data for use while writing using the API api. */
1.499 + computeFieldInfo();
1.500 + }
1.501 +
1.502 + /* Get the serialVersionUID from the class.
1.503 + * It uses the access override mechanism so make sure
1.504 + * the field objects is only used here.
1.505 + *
1.506 + * NonSerializable classes have a serialVerisonUID of 0L.
1.507 + */
1.508 + if (isNonSerializable()) {
1.509 + suid = 0L;
1.510 + } else {
1.511 + // Lookup special Serializable members using reflection.
1.512 + AccessController.doPrivileged(new PrivilegedAction() {
1.513 + public Object run() {
1.514 + if (forProxyClass) {
1.515 + // proxy classes always have serialVersionUID of 0L
1.516 + suid = 0L;
1.517 + } else {
1.518 + try {
1.519 + final Field f = cl.getDeclaredField("serialVersionUID");
1.520 + int mods = f.getModifiers();
1.521 + // SerialBug 5: static final SUID should be read
1.522 + if (Modifier.isStatic(mods) && Modifier.isFinal(mods) ) {
1.523 + f.setAccessible(true);
1.524 + suid = f.getLong(cl);
1.525 + // SerialBug 2: should be computed after writeObject
1.526 + // actualSuid = computeStructuralUID(cl);
1.527 + } else {
1.528 + suid = _computeSerialVersionUID(cl);
1.529 + // SerialBug 2: should be computed after writeObject
1.530 + // actualSuid = computeStructuralUID(cl);
1.531 + }
1.532 + } catch (NoSuchFieldException ex) {
1.533 + suid = _computeSerialVersionUID(cl);
1.534 + // SerialBug 2: should be computed after writeObject
1.535 + // actualSuid = computeStructuralUID(cl);
1.536 + } catch (IllegalAccessException ex) {
1.537 + suid = _computeSerialVersionUID(cl);
1.538 + }
1.539 + }
1.540 +
1.541 + writeReplaceObjectMethod = ObjectStreamClass.getInheritableMethod(cl,
1.542 + "writeReplace", noTypesList, Object.class);
1.543 +
1.544 + readResolveObjectMethod = ObjectStreamClass.getInheritableMethod(cl,
1.545 + "readResolve", noTypesList, Object.class);
1.546 +
1.547 + if (externalizable)
1.548 + cons = getExternalizableConstructor(cl) ;
1.549 + else
1.550 + cons = getSerializableConstructor(cl) ;
1.551 +
1.552 + if (serializable && !forProxyClass) {
1.553 + /* Look for the writeObject method
1.554 + * Set the accessible flag on it here. ObjectOutputStream
1.555 + * will call it as necessary.
1.556 + */
1.557 + writeObjectMethod = getPrivateMethod( cl, "writeObject",
1.558 + new Class[] { java.io.ObjectOutputStream.class }, Void.TYPE ) ;
1.559 + readObjectMethod = getPrivateMethod( cl, "readObject",
1.560 + new Class[] { java.io.ObjectInputStream.class }, Void.TYPE ) ;
1.561 + }
1.562 + return null;
1.563 + }
1.564 + });
1.565 + }
1.566 +
1.567 + // This call depends on a lot of information computed above!
1.568 + actualSuid = ObjectStreamClass.computeStructuralUID(this, cl);
1.569 +
1.570 + // If we have a write object method, precompute the
1.571 + // RMI-IIOP stream format version 2 optional data
1.572 + // repository ID.
1.573 + if (hasWriteObject())
1.574 + rmiiiopOptionalDataRepId = computeRMIIIOPOptionalDataRepId();
1.575 +
1.576 + // This must be done last.
1.577 + initialized = true;
1.578 + }
1.579 + }
1.580 +
1.581 + /**
1.582 + * Returns non-static private method with given signature defined by given
1.583 + * class, or null if none found. Access checks are disabled on the
1.584 + * returned method (if any).
1.585 + */
1.586 + private static Method getPrivateMethod(Class cl, String name,
1.587 + Class[] argTypes,
1.588 + Class returnType)
1.589 + {
1.590 + try {
1.591 + Method meth = cl.getDeclaredMethod(name, argTypes);
1.592 + meth.setAccessible(true);
1.593 + int mods = meth.getModifiers();
1.594 + return ((meth.getReturnType() == returnType) &&
1.595 + ((mods & Modifier.STATIC) == 0) &&
1.596 + ((mods & Modifier.PRIVATE) != 0)) ? meth : null;
1.597 + } catch (NoSuchMethodException ex) {
1.598 + return null;
1.599 + }
1.600 + }
1.601 +
1.602 + // Specific to RMI-IIOP
1.603 + /**
1.604 + * Java to IDL ptc-02-01-12 1.5.1
1.605 + *
1.606 + * "The rep_id string passed to the start_value method must be
1.607 + * 'RMI:org.omg.custom.class:hashcode:suid' where class is the
1.608 + * fully-qualified name of the class whose writeObject method
1.609 + * is being invoked and hashcode and suid are the class's hashcode
1.610 + * and SUID."
1.611 + */
1.612 + private String computeRMIIIOPOptionalDataRepId() {
1.613 +
1.614 + StringBuffer sbuf = new StringBuffer("RMI:org.omg.custom.");
1.615 + sbuf.append(RepositoryId.convertToISOLatin1(this.getName()));
1.616 + sbuf.append(':');
1.617 + sbuf.append(this.getActualSerialVersionUIDStr());
1.618 + sbuf.append(':');
1.619 + sbuf.append(this.getSerialVersionUIDStr());
1.620 +
1.621 + return sbuf.toString();
1.622 + }
1.623 +
1.624 + /**
1.625 + * This will return null if there is no writeObject method.
1.626 + */
1.627 + public final String getRMIIIOPOptionalDataRepId() {
1.628 + return rmiiiopOptionalDataRepId;
1.629 + }
1.630 +
1.631 + /*
1.632 + * Create an empty ObjectStreamClass for a class about to be read.
1.633 + * This is separate from read so ObjectInputStream can assign the
1.634 + * wire handle early, before any nested ObjectStreamClass might
1.635 + * be read.
1.636 + */
1.637 + ObjectStreamClass(String n, long s) {
1.638 + name = n;
1.639 + suid = s;
1.640 + superclass = null;
1.641 + }
1.642 +
1.643 + private static Object[] translateFields(Object objs[])
1.644 + throws NoSuchFieldException {
1.645 + try{
1.646 + java.io.ObjectStreamField fields[] = (java.io.ObjectStreamField[])objs;
1.647 + Object translation[] = null;
1.648 +
1.649 + if (translatedFields == null)
1.650 + translatedFields = new Hashtable();
1.651 +
1.652 + translation = (Object[])translatedFields.get(fields);
1.653 +
1.654 + if (translation != null)
1.655 + return translation;
1.656 + else {
1.657 + Class osfClass = Class.forName("com.sun.corba.se.impl.io.ObjectStreamField");
1.658 + translation = (Object[])java.lang.reflect.Array.newInstance(osfClass, objs.length);
1.659 + Object arg[] = new Object[2];
1.660 + Class types[] = {String.class, Class.class};
1.661 + Constructor constructor = osfClass.getDeclaredConstructor(types);
1.662 + for (int i = fields.length -1; i >= 0; i--){
1.663 + arg[0] = fields[i].getName();
1.664 + arg[1] = fields[i].getType();
1.665 +
1.666 + translation[i] = constructor.newInstance(arg);
1.667 + }
1.668 + translatedFields.put(fields, translation);
1.669 +
1.670 + }
1.671 +
1.672 + return (Object[])translation;
1.673 + }
1.674 + catch(Throwable t){
1.675 + NoSuchFieldException nsfe = new NoSuchFieldException();
1.676 + nsfe.initCause( t ) ;
1.677 + throw nsfe ;
1.678 + }
1.679 + }
1.680 +
1.681 + /*
1.682 + * Set the class this version descriptor matches.
1.683 + * The base class name and serializable hash must match.
1.684 + * Fill in the reflected Fields that will be used
1.685 + * for reading.
1.686 + */
1.687 + final void setClass(Class cl) throws InvalidClassException {
1.688 +
1.689 + if (cl == null) {
1.690 + localClassDesc = null;
1.691 + ofClass = null;
1.692 + computeFieldInfo();
1.693 + return;
1.694 + }
1.695 +
1.696 + localClassDesc = lookupInternal(cl);
1.697 + if (localClassDesc == null)
1.698 + // XXX I18N, logging needed
1.699 + throw new InvalidClassException(cl.getName(),
1.700 + "Local class not compatible");
1.701 + if (suid != localClassDesc.suid) {
1.702 +
1.703 + /* Check for exceptional cases that allow mismatched suid. */
1.704 +
1.705 + /* Allow adding Serializable or Externalizable
1.706 + * to a later release of the class.
1.707 + */
1.708 + boolean addedSerialOrExtern =
1.709 + isNonSerializable() || localClassDesc.isNonSerializable();
1.710 +
1.711 + /* Disregard the serialVersionUID of an array
1.712 + * when name and cl.Name differ. If resolveClass() returns
1.713 + * an array with a different package name,
1.714 + * the serialVersionUIDs will not match since the fully
1.715 + * qualified array class is used in the
1.716 + * computation of the array's serialVersionUID. There is
1.717 + * no way to set a permanent serialVersionUID for an array type.
1.718 + */
1.719 +
1.720 + boolean arraySUID = (cl.isArray() && ! cl.getName().equals(name));
1.721 +
1.722 + if (! arraySUID && ! addedSerialOrExtern ) {
1.723 + // XXX I18N, logging needed
1.724 + throw new InvalidClassException(cl.getName(),
1.725 + "Local class not compatible:" +
1.726 + " stream classdesc serialVersionUID=" + suid +
1.727 + " local class serialVersionUID=" + localClassDesc.suid);
1.728 + }
1.729 + }
1.730 +
1.731 + /* compare the class names, stripping off package names. */
1.732 + if (! compareClassNames(name, cl.getName(), '.'))
1.733 + // XXX I18N, logging needed
1.734 + throw new InvalidClassException(cl.getName(),
1.735 + "Incompatible local class name. " +
1.736 + "Expected class name compatible with " +
1.737 + name);
1.738 +
1.739 + /*
1.740 + * Test that both implement either serializable or externalizable.
1.741 + */
1.742 +
1.743 + // The next check is more generic, since it covers the
1.744 + // Proxy case, the JDK 1.3 serialization code has
1.745 + // both checks
1.746 + //if ((serializable && localClassDesc.externalizable) ||
1.747 + // (externalizable && localClassDesc.serializable))
1.748 + // throw new InvalidClassException(localCl.getName(),
1.749 + // "Serializable is incompatible with Externalizable");
1.750 +
1.751 + if ((serializable != localClassDesc.serializable) ||
1.752 + (externalizable != localClassDesc.externalizable) ||
1.753 + (!serializable && !externalizable))
1.754 +
1.755 + // XXX I18N, logging needed
1.756 + throw new InvalidClassException(cl.getName(),
1.757 + "Serialization incompatible with Externalization");
1.758 +
1.759 + /* Set up the reflected Fields in the class where the value of each
1.760 + * field in this descriptor should be stored.
1.761 + * Each field in this ObjectStreamClass (the source) is located (by
1.762 + * name) in the ObjectStreamClass of the class(the destination).
1.763 + * In the usual (non-versioned case) the field is in both
1.764 + * descriptors and the types match, so the reflected Field is copied.
1.765 + * If the type does not match, a InvalidClass exception is thrown.
1.766 + * If the field is not present in the class, the reflected Field
1.767 + * remains null so the field will be read but discarded.
1.768 + * If extra fields are present in the class they are ignored. Their
1.769 + * values will be set to the default value by the object allocator.
1.770 + * Both the src and dest field list are sorted by type and name.
1.771 + */
1.772 +
1.773 + ObjectStreamField[] destfield =
1.774 + (ObjectStreamField[])localClassDesc.fields;
1.775 + ObjectStreamField[] srcfield =
1.776 + (ObjectStreamField[])fields;
1.777 +
1.778 + int j = 0;
1.779 + nextsrc:
1.780 + for (int i = 0; i < srcfield.length; i++ ) {
1.781 + /* Find this field in the dest*/
1.782 + for (int k = j; k < destfield.length; k++) {
1.783 + if (srcfield[i].getName().equals(destfield[k].getName())) {
1.784 + /* found match */
1.785 + if (srcfield[i].isPrimitive() &&
1.786 + !srcfield[i].typeEquals(destfield[k])) {
1.787 + // XXX I18N, logging needed
1.788 + throw new InvalidClassException(cl.getName(),
1.789 + "The type of field " +
1.790 + srcfield[i].getName() +
1.791 + " of class " + name +
1.792 + " is incompatible.");
1.793 + }
1.794 +
1.795 + /* Skip over any fields in the dest that are not in the src */
1.796 + j = k;
1.797 +
1.798 + srcfield[i].setField(destfield[j].getField());
1.799 + // go on to the next source field
1.800 + continue nextsrc;
1.801 + }
1.802 + }
1.803 + }
1.804 +
1.805 + /* Set up field data for use while reading from the input stream. */
1.806 + computeFieldInfo();
1.807 +
1.808 + /* Remember the class this represents */
1.809 + ofClass = cl;
1.810 +
1.811 + /* get the cache of these methods from the local class
1.812 + * implementation.
1.813 + */
1.814 + readObjectMethod = localClassDesc.readObjectMethod;
1.815 + readResolveObjectMethod = localClassDesc.readResolveObjectMethod;
1.816 + }
1.817 +
1.818 + /* Compare the base class names of streamName and localName.
1.819 + *
1.820 + * @return Return true iff the base class name compare.
1.821 + * @parameter streamName Fully qualified class name.
1.822 + * @parameter localName Fully qualified class name.
1.823 + * @parameter pkgSeparator class names use either '.' or '/'.
1.824 + *
1.825 + * Only compare base class name to allow package renaming.
1.826 + */
1.827 + static boolean compareClassNames(String streamName,
1.828 + String localName,
1.829 + char pkgSeparator) {
1.830 + /* compare the class names, stripping off package names. */
1.831 + int streamNameIndex = streamName.lastIndexOf(pkgSeparator);
1.832 + if (streamNameIndex < 0)
1.833 + streamNameIndex = 0;
1.834 +
1.835 + int localNameIndex = localName.lastIndexOf(pkgSeparator);
1.836 + if (localNameIndex < 0)
1.837 + localNameIndex = 0;
1.838 +
1.839 + return streamName.regionMatches(false, streamNameIndex,
1.840 + localName, localNameIndex,
1.841 + streamName.length() - streamNameIndex);
1.842 + }
1.843 +
1.844 + /*
1.845 + * Compare the types of two class descriptors.
1.846 + * They match if they have the same class name and suid
1.847 + */
1.848 + final boolean typeEquals(ObjectStreamClass other) {
1.849 + return (suid == other.suid) &&
1.850 + compareClassNames(name, other.name, '.');
1.851 + }
1.852 +
1.853 + /*
1.854 + * Return the superclass descriptor of this descriptor.
1.855 + */
1.856 + final void setSuperclass(ObjectStreamClass s) {
1.857 + superclass = s;
1.858 + }
1.859 +
1.860 + /*
1.861 + * Return the superclass descriptor of this descriptor.
1.862 + */
1.863 + final ObjectStreamClass getSuperclass() {
1.864 + return superclass;
1.865 + }
1.866 +
1.867 + /**
1.868 + * Return whether the class has a readObject method
1.869 + */
1.870 + final boolean hasReadObject() {
1.871 + return readObjectMethod != null;
1.872 + }
1.873 +
1.874 + /*
1.875 + * Return whether the class has a writeObject method
1.876 + */
1.877 + final boolean hasWriteObject() {
1.878 + return writeObjectMethod != null ;
1.879 + }
1.880 +
1.881 + /**
1.882 + * Returns when or not this class should be custom
1.883 + * marshaled (use chunking). This should happen if
1.884 + * it is Externalizable OR if it or
1.885 + * any of its superclasses has a writeObject method,
1.886 + */
1.887 + final boolean isCustomMarshaled() {
1.888 + return (hasWriteObject() || isExternalizable())
1.889 + || (superclass != null && superclass.isCustomMarshaled());
1.890 + }
1.891 +
1.892 + /*
1.893 + * Return true if all instances of 'this' Externalizable class
1.894 + * are written in block-data mode from the stream that 'this' was read
1.895 + * from. <p>
1.896 + *
1.897 + * In JDK 1.1, all Externalizable instances are not written
1.898 + * in block-data mode.
1.899 + * In JDK 1.2, all Externalizable instances, by default, are written
1.900 + * in block-data mode and the Externalizable instance is terminated with
1.901 + * tag TC_ENDBLOCKDATA. Change enabled the ability to skip Externalizable
1.902 + * instances.
1.903 + *
1.904 + * IMPLEMENTATION NOTE:
1.905 + * This should have been a mode maintained per stream; however,
1.906 + * for compatibility reasons, it was only possible to record
1.907 + * this change per class. All Externalizable classes within
1.908 + * a given stream should either have this mode enabled or
1.909 + * disabled. This is enforced by not allowing the PROTOCOL_VERSION
1.910 + * of a stream to he changed after any objects have been written.
1.911 + *
1.912 + * @see ObjectOutputStream#useProtocolVersion
1.913 + * @see ObjectStreamConstants#PROTOCOL_VERSION_1
1.914 + * @see ObjectStreamConstants#PROTOCOL_VERSION_2
1.915 + *
1.916 + * @since JDK 1.2
1.917 + */
1.918 + boolean hasExternalizableBlockDataMode() {
1.919 + return hasExternalizableBlockData;
1.920 + }
1.921 +
1.922 + /**
1.923 + * Creates a new instance of the represented class. If the class is
1.924 + * externalizable, invokes its public no-arg constructor; otherwise, if the
1.925 + * class is serializable, invokes the no-arg constructor of the first
1.926 + * non-serializable superclass. Throws UnsupportedOperationException if
1.927 + * this class descriptor is not associated with a class, if the associated
1.928 + * class is non-serializable or if the appropriate no-arg constructor is
1.929 + * inaccessible/unavailable.
1.930 + */
1.931 + Object newInstance()
1.932 + throws InstantiationException, InvocationTargetException,
1.933 + UnsupportedOperationException
1.934 + {
1.935 + if (cons != null) {
1.936 + try {
1.937 + return cons.newInstance(new Object[0]);
1.938 + } catch (IllegalAccessException ex) {
1.939 + // should not occur, as access checks have been suppressed
1.940 + InternalError ie = new InternalError();
1.941 + ie.initCause( ex ) ;
1.942 + throw ie ;
1.943 + }
1.944 + } else {
1.945 + throw new UnsupportedOperationException();
1.946 + }
1.947 + }
1.948 +
1.949 + /**
1.950 + * Returns public no-arg constructor of given class, or null if none found.
1.951 + * Access checks are disabled on the returned constructor (if any), since
1.952 + * the defining class may still be non-public.
1.953 + */
1.954 + private static Constructor getExternalizableConstructor(Class cl) {
1.955 + try {
1.956 + Constructor cons = cl.getDeclaredConstructor(new Class[0]);
1.957 + cons.setAccessible(true);
1.958 + return ((cons.getModifiers() & Modifier.PUBLIC) != 0) ?
1.959 + cons : null;
1.960 + } catch (NoSuchMethodException ex) {
1.961 + return null;
1.962 + }
1.963 + }
1.964 +
1.965 + /**
1.966 + * Returns subclass-accessible no-arg constructor of first non-serializable
1.967 + * superclass, or null if none found. Access checks are disabled on the
1.968 + * returned constructor (if any).
1.969 + */
1.970 + private static Constructor getSerializableConstructor(Class cl) {
1.971 + Class initCl = cl;
1.972 + while (Serializable.class.isAssignableFrom(initCl)) {
1.973 + if ((initCl = initCl.getSuperclass()) == null) {
1.974 + return null;
1.975 + }
1.976 + }
1.977 + try {
1.978 + Constructor cons = initCl.getDeclaredConstructor(new Class[0]);
1.979 + int mods = cons.getModifiers();
1.980 + if ((mods & Modifier.PRIVATE) != 0 ||
1.981 + ((mods & (Modifier.PUBLIC | Modifier.PROTECTED)) == 0 &&
1.982 + !packageEquals(cl, initCl)))
1.983 + {
1.984 + return null;
1.985 + }
1.986 + cons = bridge.newConstructorForSerialization(cl, cons);
1.987 + cons.setAccessible(true);
1.988 + return cons;
1.989 + } catch (NoSuchMethodException ex) {
1.990 + return null;
1.991 + }
1.992 + }
1.993 +
1.994 + /*
1.995 + * Return the ObjectStreamClass of the local class this one is based on.
1.996 + */
1.997 + final ObjectStreamClass localClassDescriptor() {
1.998 + return localClassDesc;
1.999 + }
1.1000 +
1.1001 + /*
1.1002 + * Get the Serializability of the class.
1.1003 + */
1.1004 + boolean isSerializable() {
1.1005 + return serializable;
1.1006 + }
1.1007 +
1.1008 + /*
1.1009 + * Get the externalizability of the class.
1.1010 + */
1.1011 + boolean isExternalizable() {
1.1012 + return externalizable;
1.1013 + }
1.1014 +
1.1015 + boolean isNonSerializable() {
1.1016 + return ! (externalizable || serializable);
1.1017 + }
1.1018 +
1.1019 + /*
1.1020 + * Calculate the size of the array needed to store primitive data and the
1.1021 + * number of object references to read when reading from the input
1.1022 + * stream.
1.1023 + */
1.1024 + private void computeFieldInfo() {
1.1025 + primBytes = 0;
1.1026 + objFields = 0;
1.1027 +
1.1028 + for (int i = 0; i < fields.length; i++ ) {
1.1029 + switch (fields[i].getTypeCode()) {
1.1030 + case 'B':
1.1031 + case 'Z':
1.1032 + primBytes += 1;
1.1033 + break;
1.1034 + case 'C':
1.1035 + case 'S':
1.1036 + primBytes += 2;
1.1037 + break;
1.1038 +
1.1039 + case 'I':
1.1040 + case 'F':
1.1041 + primBytes += 4;
1.1042 + break;
1.1043 + case 'J':
1.1044 + case 'D' :
1.1045 + primBytes += 8;
1.1046 + break;
1.1047 +
1.1048 + case 'L':
1.1049 + case '[':
1.1050 + objFields += 1;
1.1051 + break;
1.1052 + }
1.1053 + }
1.1054 + }
1.1055 +
1.1056 + private static void msg( String str )
1.1057 + {
1.1058 + System.out.println( str ) ;
1.1059 + }
1.1060 +
1.1061 + /* JDK 1.5 has introduced some new modifier bits (such as SYNTHETIC)
1.1062 + * that can affect the SVUID computation (see bug 4897937). These bits
1.1063 + * must be ignored, as otherwise interoperability with ORBs in earlier
1.1064 + * JDK versions can be compromised. I am adding these masks for this
1.1065 + * purpose as discussed in the CCC for this bug (see http://ccc.sfbay/4897937).
1.1066 + */
1.1067 +
1.1068 + public static final int CLASS_MASK = Modifier.PUBLIC | Modifier.FINAL |
1.1069 + Modifier.INTERFACE | Modifier.ABSTRACT ;
1.1070 + public static final int FIELD_MASK = Modifier.PUBLIC | Modifier.PRIVATE |
1.1071 + Modifier.PROTECTED | Modifier.STATIC | Modifier.FINAL |
1.1072 + Modifier.TRANSIENT | Modifier.VOLATILE ;
1.1073 + public static final int METHOD_MASK = Modifier.PUBLIC | Modifier.PRIVATE |
1.1074 + Modifier.PROTECTED | Modifier.STATIC | Modifier.FINAL |
1.1075 + Modifier.SYNCHRONIZED | Modifier.NATIVE | Modifier.ABSTRACT |
1.1076 + Modifier.STRICT ;
1.1077 +
1.1078 + /*
1.1079 + * Compute a hash for the specified class. Incrementally add
1.1080 + * items to the hash accumulating in the digest stream.
1.1081 + * Fold the hash into a long. Use the SHA secure hash function.
1.1082 + */
1.1083 + private static long _computeSerialVersionUID(Class cl) {
1.1084 + if (DEBUG_SVUID)
1.1085 + msg( "Computing SerialVersionUID for " + cl ) ;
1.1086 + ByteArrayOutputStream devnull = new ByteArrayOutputStream(512);
1.1087 +
1.1088 + long h = 0;
1.1089 + try {
1.1090 + MessageDigest md = MessageDigest.getInstance("SHA");
1.1091 + DigestOutputStream mdo = new DigestOutputStream(devnull, md);
1.1092 + DataOutputStream data = new DataOutputStream(mdo);
1.1093 +
1.1094 + if (DEBUG_SVUID)
1.1095 + msg( "\twriteUTF( \"" + cl.getName() + "\" )" ) ;
1.1096 + data.writeUTF(cl.getName());
1.1097 +
1.1098 + int classaccess = cl.getModifiers();
1.1099 + classaccess &= (Modifier.PUBLIC | Modifier.FINAL |
1.1100 + Modifier.INTERFACE | Modifier.ABSTRACT);
1.1101 +
1.1102 + /* Workaround for javac bug that only set ABSTRACT for
1.1103 + * interfaces if the interface had some methods.
1.1104 + * The ABSTRACT bit reflects that the number of methods > 0.
1.1105 + * This is required so correct hashes can be computed
1.1106 + * for existing class files.
1.1107 + * Previously this hack was previously present in the VM.
1.1108 + */
1.1109 + Method[] method = cl.getDeclaredMethods();
1.1110 + if ((classaccess & Modifier.INTERFACE) != 0) {
1.1111 + classaccess &= (~Modifier.ABSTRACT);
1.1112 + if (method.length > 0) {
1.1113 + classaccess |= Modifier.ABSTRACT;
1.1114 + }
1.1115 + }
1.1116 +
1.1117 + // Mask out any post-1.4 attributes
1.1118 + classaccess &= CLASS_MASK ;
1.1119 +
1.1120 + if (DEBUG_SVUID)
1.1121 + msg( "\twriteInt( " + classaccess + " ) " ) ;
1.1122 + data.writeInt(classaccess);
1.1123 +
1.1124 + /*
1.1125 + * Get the list of interfaces supported,
1.1126 + * Accumulate their names their names in Lexical order
1.1127 + * and add them to the hash
1.1128 + */
1.1129 + if (!cl.isArray()) {
1.1130 + /* In 1.2fcs, getInterfaces() was modified to return
1.1131 + * {java.lang.Cloneable, java.io.Serializable} when
1.1132 + * called on array classes. These values would upset
1.1133 + * the computation of the hash, so we explicitly omit
1.1134 + * them from its computation.
1.1135 + */
1.1136 +
1.1137 + Class interfaces[] = cl.getInterfaces();
1.1138 + Arrays.sort(interfaces, compareClassByName);
1.1139 +
1.1140 + for (int i = 0; i < interfaces.length; i++) {
1.1141 + if (DEBUG_SVUID)
1.1142 + msg( "\twriteUTF( \"" + interfaces[i].getName() + "\" ) " ) ;
1.1143 + data.writeUTF(interfaces[i].getName());
1.1144 + }
1.1145 + }
1.1146 +
1.1147 + /* Sort the field names to get a deterministic order */
1.1148 + Field[] field = cl.getDeclaredFields();
1.1149 + Arrays.sort(field, compareMemberByName);
1.1150 +
1.1151 + for (int i = 0; i < field.length; i++) {
1.1152 + Field f = field[i];
1.1153 +
1.1154 + /* Include in the hash all fields except those that are
1.1155 + * private transient and private static.
1.1156 + */
1.1157 + int m = f.getModifiers();
1.1158 + if (Modifier.isPrivate(m) &&
1.1159 + (Modifier.isTransient(m) || Modifier.isStatic(m)))
1.1160 + continue;
1.1161 +
1.1162 + if (DEBUG_SVUID)
1.1163 + msg( "\twriteUTF( \"" + f.getName() + "\" ) " ) ;
1.1164 + data.writeUTF(f.getName());
1.1165 +
1.1166 + // Mask out any post-1.4 bits
1.1167 + m &= FIELD_MASK ;
1.1168 +
1.1169 + if (DEBUG_SVUID)
1.1170 + msg( "\twriteInt( " + m + " ) " ) ;
1.1171 + data.writeInt(m);
1.1172 +
1.1173 + if (DEBUG_SVUID)
1.1174 + msg( "\twriteUTF( \"" + getSignature(f.getType()) + "\" ) " ) ;
1.1175 + data.writeUTF(getSignature(f.getType()));
1.1176 + }
1.1177 +
1.1178 + if (hasStaticInitializer(cl)) {
1.1179 + if (DEBUG_SVUID)
1.1180 + msg( "\twriteUTF( \"<clinit>\" ) " ) ;
1.1181 + data.writeUTF("<clinit>");
1.1182 +
1.1183 + if (DEBUG_SVUID)
1.1184 + msg( "\twriteInt( " + Modifier.STATIC + " )" ) ;
1.1185 + data.writeInt(Modifier.STATIC); // TBD: what modifiers does it have
1.1186 +
1.1187 + if (DEBUG_SVUID)
1.1188 + msg( "\twriteUTF( \"()V\" )" ) ;
1.1189 + data.writeUTF("()V");
1.1190 + }
1.1191 +
1.1192 + /*
1.1193 + * Get the list of constructors including name and signature
1.1194 + * Sort lexically, add all except the private constructors
1.1195 + * to the hash with their access flags
1.1196 + */
1.1197 +
1.1198 + MethodSignature[] constructors =
1.1199 + MethodSignature.removePrivateAndSort(cl.getDeclaredConstructors());
1.1200 + for (int i = 0; i < constructors.length; i++) {
1.1201 + MethodSignature c = constructors[i];
1.1202 + String mname = "<init>";
1.1203 + String desc = c.signature;
1.1204 + desc = desc.replace('/', '.');
1.1205 + if (DEBUG_SVUID)
1.1206 + msg( "\twriteUTF( \"" + mname + "\" )" ) ;
1.1207 + data.writeUTF(mname);
1.1208 +
1.1209 + // mask out post-1.4 modifiers
1.1210 + int modifier = c.member.getModifiers() & METHOD_MASK ;
1.1211 +
1.1212 + if (DEBUG_SVUID)
1.1213 + msg( "\twriteInt( " + modifier + " ) " ) ;
1.1214 + data.writeInt( modifier ) ;
1.1215 +
1.1216 + if (DEBUG_SVUID)
1.1217 + msg( "\twriteUTF( \"" + desc+ "\" )" ) ;
1.1218 + data.writeUTF(desc);
1.1219 + }
1.1220 +
1.1221 + /* Include in the hash all methods except those that are
1.1222 + * private transient and private static.
1.1223 + */
1.1224 + MethodSignature[] methods =
1.1225 + MethodSignature.removePrivateAndSort(method);
1.1226 + for (int i = 0; i < methods.length; i++ ) {
1.1227 + MethodSignature m = methods[i];
1.1228 + String desc = m.signature;
1.1229 + desc = desc.replace('/', '.');
1.1230 +
1.1231 + if (DEBUG_SVUID)
1.1232 + msg( "\twriteUTF( \"" + m.member.getName()+ "\" )" ) ;
1.1233 + data.writeUTF(m.member.getName());
1.1234 +
1.1235 + // mask out post-1.4 modifiers
1.1236 + int modifier = m.member.getModifiers() & METHOD_MASK ;
1.1237 +
1.1238 + if (DEBUG_SVUID)
1.1239 + msg( "\twriteInt( " + modifier + " ) " ) ;
1.1240 + data.writeInt( modifier ) ;
1.1241 +
1.1242 + if (DEBUG_SVUID)
1.1243 + msg( "\twriteUTF( \"" + desc + "\" )" ) ;
1.1244 + data.writeUTF(desc);
1.1245 + }
1.1246 +
1.1247 + /* Compute the hash value for this class.
1.1248 + * Use only the first 64 bits of the hash.
1.1249 + */
1.1250 + data.flush();
1.1251 + byte hasharray[] = md.digest();
1.1252 + for (int i = 0; i < Math.min(8, hasharray.length); i++) {
1.1253 + h += (long)(hasharray[i] & 255) << (i * 8);
1.1254 + }
1.1255 + } catch (IOException ignore) {
1.1256 + /* can't happen, but be deterministic anyway. */
1.1257 + h = -1;
1.1258 + } catch (NoSuchAlgorithmException complain) {
1.1259 + SecurityException se = new SecurityException() ;
1.1260 + se.initCause( complain ) ;
1.1261 + throw se ;
1.1262 + }
1.1263 +
1.1264 + return h;
1.1265 + }
1.1266 +
1.1267 + private static long computeStructuralUID(com.sun.corba.se.impl.io.ObjectStreamClass osc, Class cl) {
1.1268 + ByteArrayOutputStream devnull = new ByteArrayOutputStream(512);
1.1269 +
1.1270 + long h = 0;
1.1271 + try {
1.1272 +
1.1273 + if ((!java.io.Serializable.class.isAssignableFrom(cl)) ||
1.1274 + (cl.isInterface())){
1.1275 + return 0;
1.1276 + }
1.1277 +
1.1278 + if (java.io.Externalizable.class.isAssignableFrom(cl)) {
1.1279 + return 1;
1.1280 + }
1.1281 +
1.1282 + MessageDigest md = MessageDigest.getInstance("SHA");
1.1283 + DigestOutputStream mdo = new DigestOutputStream(devnull, md);
1.1284 + DataOutputStream data = new DataOutputStream(mdo);
1.1285 +
1.1286 + // Get SUID of parent
1.1287 + Class parent = cl.getSuperclass();
1.1288 + if ((parent != null))
1.1289 + // SerialBug 1; acc. to spec the one for
1.1290 + // java.lang.object
1.1291 + // should be computed and put
1.1292 + // && (parent != java.lang.Object.class))
1.1293 + {
1.1294 + //data.writeLong(computeSerialVersionUID(null,parent));
1.1295 + data.writeLong(computeStructuralUID(lookup(parent), parent));
1.1296 + }
1.1297 +
1.1298 + if (osc.hasWriteObject())
1.1299 + data.writeInt(2);
1.1300 + else
1.1301 + data.writeInt(1);
1.1302 +
1.1303 + // CORBA formal 00-11-03 10.6.2: For each field of the
1.1304 + // class that is mapped to IDL, sorted lexicographically
1.1305 + // by Java field name, in increasing order...
1.1306 + ObjectStreamField[] field = osc.getFields();
1.1307 + if (field.length > 1) {
1.1308 + Arrays.sort(field, compareObjStrFieldsByName);
1.1309 + }
1.1310 +
1.1311 + // ...Java field name in UTF encoding, field
1.1312 + // descriptor, as defined by the JVM spec...
1.1313 + for (int i = 0; i < field.length; i++) {
1.1314 + data.writeUTF(field[i].getName());
1.1315 + data.writeUTF(field[i].getSignature());
1.1316 + }
1.1317 +
1.1318 + /* Compute the hash value for this class.
1.1319 + * Use only the first 64 bits of the hash.
1.1320 + */
1.1321 + data.flush();
1.1322 + byte hasharray[] = md.digest();
1.1323 + // int minimum = Math.min(8, hasharray.length);
1.1324 + // SerialBug 3: SHA computation is wrong; for loop reversed
1.1325 + //for (int i = minimum; i > 0; i--)
1.1326 + for (int i = 0; i < Math.min(8, hasharray.length); i++) {
1.1327 + h += (long)(hasharray[i] & 255) << (i * 8);
1.1328 + }
1.1329 + } catch (IOException ignore) {
1.1330 + /* can't happen, but be deterministic anyway. */
1.1331 + h = -1;
1.1332 + } catch (NoSuchAlgorithmException complain) {
1.1333 + SecurityException se = new SecurityException();
1.1334 + se.initCause( complain ) ;
1.1335 + throw se ;
1.1336 + }
1.1337 + return h;
1.1338 + }
1.1339 +
1.1340 + /**
1.1341 + * Compute the JVM signature for the class.
1.1342 + */
1.1343 + static String getSignature(Class clazz) {
1.1344 + String type = null;
1.1345 + if (clazz.isArray()) {
1.1346 + Class cl = clazz;
1.1347 + int dimensions = 0;
1.1348 + while (cl.isArray()) {
1.1349 + dimensions++;
1.1350 + cl = cl.getComponentType();
1.1351 + }
1.1352 + StringBuffer sb = new StringBuffer();
1.1353 + for (int i = 0; i < dimensions; i++) {
1.1354 + sb.append("[");
1.1355 + }
1.1356 + sb.append(getSignature(cl));
1.1357 + type = sb.toString();
1.1358 + } else if (clazz.isPrimitive()) {
1.1359 + if (clazz == Integer.TYPE) {
1.1360 + type = "I";
1.1361 + } else if (clazz == Byte.TYPE) {
1.1362 + type = "B";
1.1363 + } else if (clazz == Long.TYPE) {
1.1364 + type = "J";
1.1365 + } else if (clazz == Float.TYPE) {
1.1366 + type = "F";
1.1367 + } else if (clazz == Double.TYPE) {
1.1368 + type = "D";
1.1369 + } else if (clazz == Short.TYPE) {
1.1370 + type = "S";
1.1371 + } else if (clazz == Character.TYPE) {
1.1372 + type = "C";
1.1373 + } else if (clazz == Boolean.TYPE) {
1.1374 + type = "Z";
1.1375 + } else if (clazz == Void.TYPE) {
1.1376 + type = "V";
1.1377 + }
1.1378 + } else {
1.1379 + type = "L" + clazz.getName().replace('.', '/') + ";";
1.1380 + }
1.1381 + return type;
1.1382 + }
1.1383 +
1.1384 + /*
1.1385 + * Compute the JVM method descriptor for the method.
1.1386 + */
1.1387 + static String getSignature(Method meth) {
1.1388 + StringBuffer sb = new StringBuffer();
1.1389 +
1.1390 + sb.append("(");
1.1391 +
1.1392 + Class[] params = meth.getParameterTypes(); // avoid clone
1.1393 + for (int j = 0; j < params.length; j++) {
1.1394 + sb.append(getSignature(params[j]));
1.1395 + }
1.1396 + sb.append(")");
1.1397 + sb.append(getSignature(meth.getReturnType()));
1.1398 + return sb.toString();
1.1399 + }
1.1400 +
1.1401 + /*
1.1402 + * Compute the JVM constructor descriptor for the constructor.
1.1403 + */
1.1404 + static String getSignature(Constructor cons) {
1.1405 + StringBuffer sb = new StringBuffer();
1.1406 +
1.1407 + sb.append("(");
1.1408 +
1.1409 + Class[] params = cons.getParameterTypes(); // avoid clone
1.1410 + for (int j = 0; j < params.length; j++) {
1.1411 + sb.append(getSignature(params[j]));
1.1412 + }
1.1413 + sb.append(")V");
1.1414 + return sb.toString();
1.1415 + }
1.1416 +
1.1417 + /*
1.1418 + * Cache of Class -> ClassDescriptor Mappings.
1.1419 + */
1.1420 + static private ObjectStreamClassEntry[] descriptorFor = new ObjectStreamClassEntry[61];
1.1421 +
1.1422 + /*
1.1423 + * findDescriptorFor a Class. This looks in the cache for a
1.1424 + * mapping from Class -> ObjectStreamClass mappings. The hashCode
1.1425 + * of the Class is used for the lookup since the Class is the key.
1.1426 + * The entries are extended from java.lang.ref.SoftReference so the
1.1427 + * gc will be able to free them if needed.
1.1428 + */
1.1429 + private static ObjectStreamClass findDescriptorFor(Class cl) {
1.1430 +
1.1431 + int hash = cl.hashCode();
1.1432 + int index = (hash & 0x7FFFFFFF) % descriptorFor.length;
1.1433 + ObjectStreamClassEntry e;
1.1434 + ObjectStreamClassEntry prev;
1.1435 +
1.1436 + /* Free any initial entries whose refs have been cleared */
1.1437 + while ((e = descriptorFor[index]) != null && e.get() == null) {
1.1438 + descriptorFor[index] = e.next;
1.1439 + }
1.1440 +
1.1441 + /* Traverse the chain looking for a descriptor with ofClass == cl.
1.1442 + * unlink entries that are unresolved.
1.1443 + */
1.1444 + prev = e;
1.1445 + while (e != null ) {
1.1446 + ObjectStreamClass desc = (ObjectStreamClass)(e.get());
1.1447 + if (desc == null) {
1.1448 + // This entry has been cleared, unlink it
1.1449 + prev.next = e.next;
1.1450 + } else {
1.1451 + if (desc.ofClass == cl)
1.1452 + return desc;
1.1453 + prev = e;
1.1454 + }
1.1455 + e = e.next;
1.1456 + }
1.1457 + return null;
1.1458 + }
1.1459 +
1.1460 + /*
1.1461 + * insertDescriptorFor a Class -> ObjectStreamClass mapping.
1.1462 + */
1.1463 + private static void insertDescriptorFor(ObjectStreamClass desc) {
1.1464 + // Make sure not already present
1.1465 + if (findDescriptorFor(desc.ofClass) != null) {
1.1466 + return;
1.1467 + }
1.1468 +
1.1469 + int hash = desc.ofClass.hashCode();
1.1470 + int index = (hash & 0x7FFFFFFF) % descriptorFor.length;
1.1471 + ObjectStreamClassEntry e = new ObjectStreamClassEntry(desc);
1.1472 + e.next = descriptorFor[index];
1.1473 + descriptorFor[index] = e;
1.1474 + }
1.1475 +
1.1476 + private static Field[] getDeclaredFields(final Class clz) {
1.1477 + return (Field[]) AccessController.doPrivileged(new PrivilegedAction() {
1.1478 + public Object run() {
1.1479 + return clz.getDeclaredFields();
1.1480 + }
1.1481 + });
1.1482 + }
1.1483 +
1.1484 +
1.1485 + /*
1.1486 + * The name of this descriptor
1.1487 + */
1.1488 + private String name;
1.1489 +
1.1490 + /*
1.1491 + * The descriptor of the supertype.
1.1492 + */
1.1493 + private ObjectStreamClass superclass;
1.1494 +
1.1495 + /*
1.1496 + * Flags for Serializable and Externalizable.
1.1497 + */
1.1498 + private boolean serializable;
1.1499 + private boolean externalizable;
1.1500 +
1.1501 + /*
1.1502 + * Array of persistent fields of this class, sorted by
1.1503 + * type and name.
1.1504 + */
1.1505 + private ObjectStreamField[] fields;
1.1506 +
1.1507 + /*
1.1508 + * Class that is a descriptor for in this virtual machine.
1.1509 + */
1.1510 + private Class ofClass;
1.1511 +
1.1512 + /*
1.1513 + * True if descriptor for a proxy class.
1.1514 + */
1.1515 + boolean forProxyClass;
1.1516 +
1.1517 +
1.1518 + /*
1.1519 + * SerialVersionUID for this class.
1.1520 + */
1.1521 + private long suid = kDefaultUID;
1.1522 + private String suidStr = null;
1.1523 +
1.1524 + /*
1.1525 + * Actual (computed) SerialVersionUID for this class.
1.1526 + */
1.1527 + private long actualSuid = kDefaultUID;
1.1528 + private String actualSuidStr = null;
1.1529 +
1.1530 + /*
1.1531 + * The total number of bytes of primitive fields.
1.1532 + * The total number of object fields.
1.1533 + */
1.1534 + int primBytes;
1.1535 + int objFields;
1.1536 +
1.1537 + /**
1.1538 + * Flag indicating whether or not this instance has
1.1539 + * successfully completed initialization. This is to
1.1540 + * try to fix bug 4373844. Working to move to
1.1541 + * reusing java.io.ObjectStreamClass for JDK 1.5.
1.1542 + */
1.1543 + private boolean initialized = false;
1.1544 +
1.1545 + /* Internal lock object. */
1.1546 + private Object lock = new Object();
1.1547 +
1.1548 + /* In JDK 1.1, external data was not written in block mode.
1.1549 + * As of JDK 1.2, external data is written in block data mode. This
1.1550 + * flag enables JDK 1.2 to be able to read JDK 1.1 written external data.
1.1551 + *
1.1552 + * @since JDK 1.2
1.1553 + */
1.1554 + private boolean hasExternalizableBlockData;
1.1555 + Method writeObjectMethod;
1.1556 + Method readObjectMethod;
1.1557 + private Method writeReplaceObjectMethod;
1.1558 + private Method readResolveObjectMethod;
1.1559 + private Constructor cons ;
1.1560 +
1.1561 + /**
1.1562 + * Beginning in Java to IDL ptc/02-01-12, RMI-IIOP has a
1.1563 + * stream format version 2 which puts a fake valuetype around
1.1564 + * a Serializable's optional custom data. This valuetype has
1.1565 + * a special repository ID made from the Serializable's
1.1566 + * information which we are pre-computing and
1.1567 + * storing here.
1.1568 + */
1.1569 + private String rmiiiopOptionalDataRepId = null;
1.1570 +
1.1571 + /*
1.1572 + * ObjectStreamClass that this one was built from.
1.1573 + */
1.1574 + private ObjectStreamClass localClassDesc;
1.1575 +
1.1576 + /* Find out if the class has a static class initializer <clinit> */
1.1577 + private static Method hasStaticInitializerMethod = null;
1.1578 + /**
1.1579 + * Returns true if the given class defines a static initializer method,
1.1580 + * false otherwise.
1.1581 + */
1.1582 + private static boolean hasStaticInitializer(Class cl) {
1.1583 + if (hasStaticInitializerMethod == null) {
1.1584 + Class classWithThisMethod = null;
1.1585 +
1.1586 + try {
1.1587 + try {
1.1588 + // When using rip-int with Merlin or when this is a Merlin
1.1589 + // workspace, the method we want is in sun.misc.ClassReflector
1.1590 + // and absent from java.io.ObjectStreamClass.
1.1591 + //
1.1592 + // When compiling rip-int with JDK 1.3.x, we have to get it
1.1593 + // from java.io.ObjectStreamClass.
1.1594 + classWithThisMethod = Class.forName("sun.misc.ClassReflector");
1.1595 + } catch (ClassNotFoundException cnfe) {
1.1596 + // Do nothing. This is either not a Merlin workspace,
1.1597 + // or rip-int is being compiled with something other than
1.1598 + // Merlin, probably JDK 1.3. Fall back on java.io.ObjectStreaClass.
1.1599 + }
1.1600 + if (classWithThisMethod == null)
1.1601 + classWithThisMethod = java.io.ObjectStreamClass.class;
1.1602 +
1.1603 + hasStaticInitializerMethod =
1.1604 + classWithThisMethod.getDeclaredMethod("hasStaticInitializer",
1.1605 + new Class[] { Class.class });
1.1606 + } catch (NoSuchMethodException ex) {
1.1607 + }
1.1608 +
1.1609 + if (hasStaticInitializerMethod == null) {
1.1610 + // XXX I18N, logging needed
1.1611 + throw new InternalError("Can't find hasStaticInitializer method on "
1.1612 + + classWithThisMethod.getName());
1.1613 + }
1.1614 + hasStaticInitializerMethod.setAccessible(true);
1.1615 + }
1.1616 +
1.1617 + try {
1.1618 + Boolean retval = (Boolean)
1.1619 + hasStaticInitializerMethod.invoke(null, new Object[] { cl });
1.1620 + return retval.booleanValue();
1.1621 + } catch (Exception ex) {
1.1622 + // XXX I18N, logging needed
1.1623 + InternalError ie = new InternalError( "Error invoking hasStaticInitializer" ) ;
1.1624 + ie.initCause( ex ) ;
1.1625 + throw ie ;
1.1626 + }
1.1627 + }
1.1628 +
1.1629 +
1.1630 + /* The Class Object for java.io.Serializable */
1.1631 + private static Class classSerializable = null;
1.1632 + private static Class classExternalizable = null;
1.1633 +
1.1634 + /*
1.1635 + * Resolve java.io.Serializable at load time.
1.1636 + */
1.1637 + static {
1.1638 + try {
1.1639 + classSerializable = Class.forName("java.io.Serializable");
1.1640 + classExternalizable = Class.forName("java.io.Externalizable");
1.1641 + } catch (Throwable e) {
1.1642 + System.err.println("Could not load java.io.Serializable or java.io.Externalizable.");
1.1643 + }
1.1644 + }
1.1645 +
1.1646 + /** use serialVersionUID from JDK 1.1. for interoperability */
1.1647 + private static final long serialVersionUID = -6120832682080437368L;
1.1648 +
1.1649 + /**
1.1650 + * Set serialPersistentFields of a Serializable class to this value to
1.1651 + * denote that the class has no Serializable fields.
1.1652 + */
1.1653 + public static final ObjectStreamField[] NO_FIELDS =
1.1654 + new ObjectStreamField[0];
1.1655 +
1.1656 + /*
1.1657 + * Entries held in the Cache of known ObjectStreamClass objects.
1.1658 + * Entries are chained together with the same hash value (modulo array size).
1.1659 + */
1.1660 + private static class ObjectStreamClassEntry // extends java.lang.ref.SoftReference
1.1661 + {
1.1662 + ObjectStreamClassEntry(ObjectStreamClass c) {
1.1663 + //super(c);
1.1664 + this.c = c;
1.1665 + }
1.1666 + ObjectStreamClassEntry next;
1.1667 +
1.1668 + public Object get()
1.1669 + {
1.1670 + return c;
1.1671 + }
1.1672 + private ObjectStreamClass c;
1.1673 + }
1.1674 +
1.1675 + /*
1.1676 + * Comparator object for Classes and Interfaces
1.1677 + */
1.1678 + private static Comparator compareClassByName =
1.1679 + new CompareClassByName();
1.1680 +
1.1681 + private static class CompareClassByName implements Comparator {
1.1682 + public int compare(Object o1, Object o2) {
1.1683 + Class c1 = (Class)o1;
1.1684 + Class c2 = (Class)o2;
1.1685 + return (c1.getName()).compareTo(c2.getName());
1.1686 + }
1.1687 + }
1.1688 +
1.1689 + /**
1.1690 + * Comparator for ObjectStreamFields by name
1.1691 + */
1.1692 + private final static Comparator compareObjStrFieldsByName
1.1693 + = new CompareObjStrFieldsByName();
1.1694 +
1.1695 + private static class CompareObjStrFieldsByName implements Comparator {
1.1696 + public int compare(Object o1, Object o2) {
1.1697 + ObjectStreamField osf1 = (ObjectStreamField)o1;
1.1698 + ObjectStreamField osf2 = (ObjectStreamField)o2;
1.1699 +
1.1700 + return osf1.getName().compareTo(osf2.getName());
1.1701 + }
1.1702 + }
1.1703 +
1.1704 + /*
1.1705 + * Comparator object for Members, Fields, and Methods
1.1706 + */
1.1707 + private static Comparator compareMemberByName =
1.1708 + new CompareMemberByName();
1.1709 +
1.1710 + private static class CompareMemberByName implements Comparator {
1.1711 + public int compare(Object o1, Object o2) {
1.1712 + String s1 = ((Member)o1).getName();
1.1713 + String s2 = ((Member)o2).getName();
1.1714 +
1.1715 + if (o1 instanceof Method) {
1.1716 + s1 += getSignature((Method)o1);
1.1717 + s2 += getSignature((Method)o2);
1.1718 + } else if (o1 instanceof Constructor) {
1.1719 + s1 += getSignature((Constructor)o1);
1.1720 + s2 += getSignature((Constructor)o2);
1.1721 + }
1.1722 + return s1.compareTo(s2);
1.1723 + }
1.1724 + }
1.1725 +
1.1726 + /* It is expensive to recompute a method or constructor signature
1.1727 + many times, so compute it only once using this data structure. */
1.1728 + private static class MethodSignature implements Comparator {
1.1729 + Member member;
1.1730 + String signature; // cached parameter signature
1.1731 +
1.1732 + /* Given an array of Method or Constructor members,
1.1733 + return a sorted array of the non-private members.*/
1.1734 + /* A better implementation would be to implement the returned data
1.1735 + structure as an insertion sorted link list.*/
1.1736 + static MethodSignature[] removePrivateAndSort(Member[] m) {
1.1737 + int numNonPrivate = 0;
1.1738 + for (int i = 0; i < m.length; i++) {
1.1739 + if (! Modifier.isPrivate(m[i].getModifiers())) {
1.1740 + numNonPrivate++;
1.1741 + }
1.1742 + }
1.1743 + MethodSignature[] cm = new MethodSignature[numNonPrivate];
1.1744 + int cmi = 0;
1.1745 + for (int i = 0; i < m.length; i++) {
1.1746 + if (! Modifier.isPrivate(m[i].getModifiers())) {
1.1747 + cm[cmi] = new MethodSignature(m[i]);
1.1748 + cmi++;
1.1749 + }
1.1750 + }
1.1751 + if (cmi > 0)
1.1752 + Arrays.sort(cm, cm[0]);
1.1753 + return cm;
1.1754 + }
1.1755 +
1.1756 + /* Assumes that o1 and o2 are either both methods
1.1757 + or both constructors.*/
1.1758 + public int compare(Object o1, Object o2) {
1.1759 + /* Arrays.sort calls compare when o1 and o2 are equal.*/
1.1760 + if (o1 == o2)
1.1761 + return 0;
1.1762 +
1.1763 + MethodSignature c1 = (MethodSignature)o1;
1.1764 + MethodSignature c2 = (MethodSignature)o2;
1.1765 +
1.1766 + int result;
1.1767 + if (isConstructor()) {
1.1768 + result = c1.signature.compareTo(c2.signature);
1.1769 + } else { // is a Method.
1.1770 + result = c1.member.getName().compareTo(c2.member.getName());
1.1771 + if (result == 0)
1.1772 + result = c1.signature.compareTo(c2.signature);
1.1773 + }
1.1774 + return result;
1.1775 + }
1.1776 +
1.1777 + final private boolean isConstructor() {
1.1778 + return member instanceof Constructor;
1.1779 + }
1.1780 + private MethodSignature(Member m) {
1.1781 + member = m;
1.1782 + if (isConstructor()) {
1.1783 + signature = ObjectStreamClass.getSignature((Constructor)m);
1.1784 + } else {
1.1785 + signature = ObjectStreamClass.getSignature((Method)m);
1.1786 + }
1.1787 + }
1.1788 + }
1.1789 +
1.1790 + /**
1.1791 + * Returns non-static, non-abstract method with given signature provided it
1.1792 + * is defined by or accessible (via inheritance) by the given class, or
1.1793 + * null if no match found. Access checks are disabled on the returned
1.1794 + * method (if any).
1.1795 + *
1.1796 + * Copied from the Merlin java.io.ObjectStreamClass.
1.1797 + */
1.1798 + private static Method getInheritableMethod(Class cl, String name,
1.1799 + Class[] argTypes,
1.1800 + Class returnType)
1.1801 + {
1.1802 + Method meth = null;
1.1803 + Class defCl = cl;
1.1804 + while (defCl != null) {
1.1805 + try {
1.1806 + meth = defCl.getDeclaredMethod(name, argTypes);
1.1807 + break;
1.1808 + } catch (NoSuchMethodException ex) {
1.1809 + defCl = defCl.getSuperclass();
1.1810 + }
1.1811 + }
1.1812 +
1.1813 + if ((meth == null) || (meth.getReturnType() != returnType)) {
1.1814 + return null;
1.1815 + }
1.1816 + meth.setAccessible(true);
1.1817 + int mods = meth.getModifiers();
1.1818 + if ((mods & (Modifier.STATIC | Modifier.ABSTRACT)) != 0) {
1.1819 + return null;
1.1820 + } else if ((mods & (Modifier.PUBLIC | Modifier.PROTECTED)) != 0) {
1.1821 + return meth;
1.1822 + } else if ((mods & Modifier.PRIVATE) != 0) {
1.1823 + return (cl == defCl) ? meth : null;
1.1824 + } else {
1.1825 + return packageEquals(cl, defCl) ? meth : null;
1.1826 + }
1.1827 + }
1.1828 +
1.1829 + /**
1.1830 + * Returns true if classes are defined in the same package, false
1.1831 + * otherwise.
1.1832 + *
1.1833 + * Copied from the Merlin java.io.ObjectStreamClass.
1.1834 + */
1.1835 + private static boolean packageEquals(Class cl1, Class cl2) {
1.1836 + Package pkg1 = cl1.getPackage(), pkg2 = cl2.getPackage();
1.1837 + return ((pkg1 == pkg2) || ((pkg1 != null) && (pkg1.equals(pkg2))));
1.1838 + }
1.1839 +}
