Overlay: Add discarding for Java classes, interfaces & fields #20294
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Pull Request Overview
This PR adds discarding capabilities for Java classes, interfaces, and fields in the CodeQL library by introducing overlay classes that extend DiscardableReferableLocatable.
- Adds overlay import to Type.qll for discarding functionality
- Creates discardable overlay classes for ClassOrInterface and Field types
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| java/ql/lib/semmle/code/java/Type.qll | Adds overlay import and DiscardableClassOrInterface class |
| java/ql/lib/semmle/code/java/Member.qll | Adds DiscardableField overlay class |
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@aschackmull Could you take a look at this PR? |
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This PR adds discarding for Java classes, interfaces & fields. For all three entities, entity ids are generated using TRAP keys and the entities are therefore only discarded from base if their file is extracted in the overlay variant and the entity is not extracted in the overlay.
DCA experiments show no effect on overlay analysis accuracy on the code-scanning query suite (main vs. with additional discarding) and a tiny improvement on the full nightly query suite (main vs. with additional discarding).
For https://github.com/github/codeql-core/issues/5024.