WideFieldMask: ofFacets(int...) package-private; pin ledger L1/L2 in ApiSurfaceTest - #75
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…ApiSurfaceTest The two T2/T3 leaks the mechanical fence (#74) could not see, because reflection cannot tell `int classid` from `int facet`. L1 — WideFieldMask.ofFacets(int...) built a field mask from raw facet SLOT positions: a byte position crossing the consumer wall. Zero production callers (only MaskNativeOpsTest, same package, unaffected). Demoted to package-private, not removed (I-LEGACY-API-FEATURE-GATED: same shape, narrower reach) — it stays as the in-package bridge behind ofMatchBits and the bit-layout tests. The name-side replacement needed no ABI symbol: RowStore.hop(int edgeClassid, Mask) passes allFacets() and lgj_hop narrows natively by edge_participation(classid); its javadoc already said "a caller cannot widen past what the class actually permits." allFacets() = "let the class decide" is now the consumer's whole participation vocabulary. ApiSurfaceTest pins it BY NAME: re-publicising ofFacets fails the build. L2 — closes by the EXISTING gate; the ledger overstated it. abi.md:312: "Java's public API never sees an address." The offset+stride carrier is Engine.LaneWindow in internal.ffm, used only inside RowStore/Mask/LaneProbe (package-private) and the sanctioned lab consumers; the internal.* prefix already fences it from every public signature. RowStore's row * strideBytes() reads the stride FROM the served descriptor (abi.md:367), never computes it — NAMED under kernel-membrane-warden, not GEOMETRY-LEAK. ApiSurfaceTest now proves it structurally: the class exists AND lives under a FORBIDDEN prefix. Not run in-session: the Java suite (JDK 21 here vs JDK 27 + preview FFM). WideFieldMask.java compiled standalone; the L1 reflection pin proven standalone (declared, not on getMethods(), allFacets public). CI runs the rest. LATEST_STATE entry in this commit. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016WkNBjHc2e3zuyz9i8qJEv
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📝 WalkthroughWalkthroughThe change narrows ChangesAPI membrane enforcement
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to The change hides one raw-mask factory, but callers can still construct raw masks through other public entry points. Those paths and their API checks should be addressed before marking the boundary complete. Suggested reviewers: Poem
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In `@java/src/main/java/com/adaworldapi/lancegraph/WideFieldMask.java`:
- Line 67: Restrict raw-mask construction to internal use by making
ofMatchBits(int) and the WideFieldMask record’s canonical long constructor
non-public, or replace them with semantic factory methods that do not accept
caller-controlled masks. Update ApiSurfaceTest to verify both construction paths
are no longer publicly accessible.
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…st sees through erasure (L2) Codex + CodeRabbit P2 on #75, both valid, both root causes: 1. Demoting ofFacets alone did not fence L1. WideFieldMask was a public record, so its canonical ctor `new WideFieldMask(1L << slot)` was a public bits-in path, and ofMatchBits(int) another. Now: final class, private ctor, ofFacets AND ofMatchBits package-private, value-based equals/ hashCode, no public value(). Still JEP 401 value-class-eligible (a value class may keep a private ctor + public factories). The ApiSurfaceTest pin is on the SHAPE, not a name: no public ctor, not a record, every public factory zero-arg — any future bits-in factory, whatever its name, fails. Only EMPTY and allFacets() remain public ("let the class decide"; RowStore.hop takes the classid, native narrows by edge_participation). FacetMatchView's {@link} to ofMatchBits -> {@code}. 2. The L2 pin was erasure-blind: leaksIn used getReturnType(), so `List<Engine.LaneWindow>` erased to `List` and passed. checkType() now walks generic signatures recursively (ParameterizedType, GenericArrayType, WildcardType, TypeVariable bounds) for returns, params and fields, with can-it-fire (`List<java.lang.invoke.MethodHandle>` — a FORBIDDEN prefix, plain JDK, no preview — flagged; the erased-only check misses it, so the walk is load-bearing; nested + array generics flagged) and can-it-stay-silent (`List<String>` not flagged). Standalone (JDK 21): shape proof 5/5, walker proof 4/4. Full Java suite in CI (JDK 27 + preview FFM). Blast radius: no caller used the record ctor, value(), or ofMatchBits outside the in-package tests; consumers use only the type and allFacets(). LATEST_STATE amended in this commit. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016WkNBjHc2e3zuyz9i8qJEv
…cets Revert #75: restore public WideFieldMask.ofFacets / ofMatchBits (removal was not authorized)
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What (original description)
The two T2/T3 leaks the mechanical fence (#74) could not see — because reflection cannot tell
int classid(a name) fromint facet(a slot). Ledger rows L1 and L2 in lance-graph'smembrane-tiers.md.L1 —
WideFieldMask.ofFacets(int...)→ package-privateIt built a field mask from raw facet slot positions: a byte position crossing the consumer wall. Zero production callers — only
MaskNativeOpsTest(same package, unaffected).Demoted, not removed (I-LEGACY-API-FEATURE-GATED: same shape, narrower reach) — it stays as the in-package bridge behind
ofMatchBitsand the bit-layout tests.The name-side replacement needed no ABI symbol:
RowStore.hop(int edgeClassid, Mask)passesallFacets()andlgj_hopnarrows natively byedge_participation(classid). Its javadoc already said "a caller cannot widen past what the class actually permits."allFacets()= "let the class decide" is now the consumer's whole participation vocabulary.ApiSurfaceTestpins it by name — re-publicisingofFacetsfails the build.L2 — closes by the existing gate; the ledger overstated it
abi.md:312: "Java's public API never sees an address." The offset+stride carrier isEngine.LaneWindowininternal.ffm, used only insideRowStore/Mask/LaneProbe(package-private) and the sanctioned lab consumers (bench, valhalla-lab). Theinternal.*prefix already fences it from every public signature. AndRowStore'srow * strideBytes()reads the stride from the served descriptor (abi.md:367) — NAMED underkernel-membrane-warden, not GEOMETRY-LEAK.Added a structural pin: the class exists and lives under a FORBIDDEN prefix, so any public signature carrying it is already a LEAK. L2 is closed by proof, not promise. The genuine residual is a design ceiling, not a leak: layout-aware Valhalla views should be OGAR-emitted per ClassView (Tier 3), not hand-carved — a future wave.
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