> Issue [JDK-8164908](https://bugs.openjdk.org/browse/JDK-8164908) added > support for functionality required to continue to support IIOP and custom > serializers in light of additional module-based restrictions on reflection. > It was expected that these libraries would use `sun.misc.Unsafe` in order to > access fields of serializable classes. However, with JEP 471, the methods > necessary to do this are being removed. > > To allow these libraries to continue to function, it is proposed to add two > methods to `sun.reflect.ReflectionFactory` which will allow serialization > libraries to acquire a method handle to generated `readObject`/`writeObject` > methods which set or get the fields of the serializable class using the > serialization `GetField`/`PutField` mechanism. These generated methods should > be used by serialization libraries to serialize and deserialize classes which > do not have a `readObject`/`writeObject` method or which use > `ObjectInputStream.defaultReadObject`/`ObjectOutputStream.defaultWriteObject` > to supplement default serialization. > > It is also proposed to add methods which allow for the reading of > serialization-specific private static final fields from classes which have > them. > > With the addition of these methods, serialization libraries no longer need to > rely on `Unsafe` for serialization/deserialization activities. > cc: @AlanBateman
David M. Lloyd has updated the pull request incrementally with two additional commits since the last revision: - Eliminate cache - Rework using facilities found in ObjectStreamClass This variation has the disadvantage of requiring a couple temporary arrays to be allocated each time the method handles are used. ------------- Changes: - all: https://git.openjdk.org/jdk/pull/19702/files - new: https://git.openjdk.org/jdk/pull/19702/files/e7334655..1d8f1b22 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=19702&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19702&range=00-01 Stats: 620 lines in 6 files changed: 187 ins; 427 del; 6 mod Patch: https://git.openjdk.org/jdk/pull/19702.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/19702/head:pull/19702 PR: https://git.openjdk.org/jdk/pull/19702
