On Thu, 20 May 2021 16:10:11 GMT, Roger Riggs <rri...@openjdk.org> wrote:

>> JEP 415: Context-specific Deserialization Filters extends the 
>> deserialization filtering mechanisms with more flexible and customizable 
>> protections against malicious deserialization.  See JEP 415: 
>> https://openjdk.java.net/jeps/415.
>> The `java.io.ObjectInputFilter` and `java.io.ObjectInputStream` classes are 
>> extended with additional
>> configuration mechanisms and filter utilities.
>> 
>> javadoc for `ObjectInputFilter`, `ObjectInputFilter.Config`, and 
>> `ObjectInputStream`:
>>     
>> http://cr.openjdk.java.net/~rriggs/filter-factory/java.base/java/io/ObjectInputFilter.html
>
> Roger Riggs has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   Simplify factory interface to BinaryOperator<ObjectInputFilter> and cleanup 
> the example

src/java.base/share/classes/java/io/ObjectInputFilter.java line 280:

> 278:      *      filter status
> 279:      */
> 280:     default ObjectInputFilter rejectUndecidedClass() {

It is my understanding that an implSpec will be required for this and the other 
default method.

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PR: https://git.openjdk.java.net/jdk/pull/3996

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