RFR: 8296734: JarVerifier:: mapSignersToCodeSource should cache in map

[pandaapo]

On Mon, 14 Nov 2022 18:41:41 GMT, Sean Mullan <mullan at openjdk.org> wrote:

> Yes. I believe the `setEagerValidation` method can also be removed and all code that calls it.

OK, I will remove it and all methods that calls it:
![jdk issue 8296734](https://user-images.githubusercontent.com/35672972/202113084-e7308680-bb15-4b2e-b8ba-514054e42620.png) .

Because `JarVerifier#setEagerValidation` will be removed, the field `eagerValidation` will always be false.

There are some codes using this field:
https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/java/util/jar/JarVerifier.java#L361-L381
Can I remove the `eagerValidation` condition from `if(eagerValidation && sigFileSigners.get(name) != null)`?
https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/java/util/jar/JarFile.java#L1229-L1247
Can I remove the `if (jv.eagerValidation) {}` code block?

Can I remove this field from `JarVerifier`?

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PR: https://git.openjdk.org/jdk/pull/11072