[TrimmableTypeMap] Add TypeMap proxy groundwork with CreateInstance by simonrozsival · Pull Request #10808 · dotnet/android

simonrozsival · 2026-02-12T16:40:05Z

Summary

Adds the core pipeline that transforms scanned JavaPeerInfo records into TypeMap .dll assemblies with proxy types and CreateInstance support.

Generator pipeline

TypeMapAssemblyData model: records for proxy types, type map attributes, associations
ModelBuilder: transforms JavaPeerInfo → TypeMapAssemblyData with alias detection, ACW filtering, proxy naming, cross-assembly IgnoresAccessChecksTo support
TypeMapAssemblyEmitter: PE/IL emission of proxy types with CreateInstance, get_TargetType, get_InvokerType properties
TypeMapAssemblyGenerator: orchestrates Build + Emit pipeline
RootTypeMapAssemblyGenerator: generates root _Microsoft.Android.TypeMaps.dll
JniSignatureHelper: JNI signature parsing utility
Scanner enrichment for generator consumption

Tests

Comprehensive test coverage for model builder, assembly generator, and root assembly generator

UCO wrappers, RegisterNatives, and IAndroidCallableWrapper support will be added in a follow-up PR.

Stacked PRs:

PR [TrimmableTypeMap] Add TypeMap proxy groundwork with CreateInstance #10808 ← this PR — Proxy groundwork with CreateInstance
PR [TrimmableTypeMap] Add UCO wrappers, RegisterNatives, and IAndroidCallableWrapper #10831 — UCO wrappers + RegisterNatives
PR [TrimmableTypeMap] Add JCW Java source generator #10830 — JCW Java Source Generation

Add the core pipeline that transforms scanned JavaPeerInfo records into TypeMap .dll assemblies with proxy types and CreateInstance support: - TypeMapAssemblyData model: proxy types, TypeMap attributes, associations - ModelBuilder: transforms JavaPeerInfo into model with alias detection, ACW filtering, proxy naming, cross-assembly IgnoresAccessChecksTo - TypeMapAssemblyEmitter: PE/IL emission of proxy types with CreateInstance, get_TargetType, get_InvokerType properties - TypeMapAssemblyGenerator: orchestrates Build + Emit pipeline - RootTypeMapAssemblyGenerator: generates root _Microsoft.Android.TypeMaps.dll - JniSignatureHelper: JNI signature parsing utility - Scanner enrichment for generator consumption - Comprehensive tests for model builder, assembly generator, root generator UCO wrappers, RegisterNatives, and IAndroidCallableWrapper support will be added in a follow-up PR. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

This entire test file references JcwJavaSourceGenerator which doesn't exist in this PR or anywhere in the repo yet. It belongs with PR #10830 (JCW Java Source Generation) which introduces that class. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Move UCO-specific JniSignatureHelper methods (JniParamKind, ParseParameterTypes, ParseReturnType, EncodeClrType, ParseSingleType) and their tests to PR #10831. Move JCW-specific scanner properties (BaseJavaName, ImplementedInterfaceJavaNames, JavaConstructors, JavaConstructorInfo) and resolver methods (ResolveBaseJavaName, ResolveImplementedInterfaceJavaNames, ResolveInterfaceJniName, BuildJavaConstructors) to PR #10830. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add JniParamKind enum, ParseParameterTypes, ParseReturnType, EncodeClrType, ParseSingleType, and their test classes (JniSignatureHelperTests, NegativeEdgeCase) — moved from PR #10808. Also add back JavaConstructors property, JavaConstructorInfo record, and BuildJavaConstructors scanner method needed by ModelBuilder. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add BaseJavaName, ImplementedInterfaceJavaNames properties to JavaPeerInfo, and ResolveBaseJavaName, ResolveImplementedInterfaceJavaNames, ResolveInterfaceJniName methods to JavaPeerScanner — moved from PR #10808. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add JniParamKind enum, ParseParameterTypes, ParseReturnType, EncodeClrType, ParseSingleType, and their test classes (JniSignatureHelperTests, NegativeEdgeCase) — moved from PR #10808. Also add back JavaConstructors property, JavaConstructorInfo record, and BuildJavaConstructors scanner method needed by ModelBuilder. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add BaseJavaName, ImplementedInterfaceJavaNames properties to JavaPeerInfo, and ResolveBaseJavaName, ResolveImplementedInterfaceJavaNames, ResolveInterfaceJniName methods to JavaPeerScanner — moved from PR #10808. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Use xUnit's IDisposable pattern for test cleanup instead of manual try-finally blocks. Each nested test class that generates temp files now creates a per-instance temp directory in a field initializer and cleans it up in Dispose(). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add JniParamKind enum, ParseParameterTypes, ParseReturnType, EncodeClrType, ParseSingleType, and their test classes (JniSignatureHelperTests, NegativeEdgeCase) — moved from PR #10808. Also add back JavaConstructors property, JavaConstructorInfo record, and BuildJavaConstructors scanner method needed by ModelBuilder. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add BaseJavaName, ImplementedInterfaceJavaNames properties to JavaPeerInfo, and ResolveBaseJavaName, ResolveImplementedInterfaceJavaNames, ResolveInterfaceJniName methods to JavaPeerScanner — moved from PR #10808. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Remove // ---- section separator comments from PEAssemblyBuilder and TypeMapAssemblyEmitter - Expand all single-line /// <summary>...</summary> to 3-line format - Remove trivial property doc comments that just restate the name Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add JniParamKind enum, ParseParameterTypes, ParseReturnType, EncodeClrType, ParseSingleType, and their test classes (JniSignatureHelperTests, NegativeEdgeCase) — moved from PR #10808. Also add back JavaConstructors property, JavaConstructorInfo record, and BuildJavaConstructors scanner method needed by ModelBuilder. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add BaseJavaName, ImplementedInterfaceJavaNames properties to JavaPeerInfo, and ResolveBaseJavaName, ResolveImplementedInterfaceJavaNames, ResolveInterfaceJniName methods to JavaPeerScanner — moved from PR #10808. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

simonrozsival · 2026-02-20T10:27:34Z

/azp run

azure-pipelines · 2026-02-20T10:27:50Z

Azure Pipelines successfully started running 1 pipeline(s).

simonrozsival · 2026-02-20T11:03:06Z

/azp run Xamarin.Android-PR

azure-pipelines · 2026-02-20T11:03:12Z

No pipelines are associated with this pull request.

Retry all PR checks to refresh failing internal status context.\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add a Linux template parameter for MSBUILD_ARGS and set -m:2 in the public pipeline Linux build to reduce recurrent MSB4166/OOM failures.\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

…ators

simonrozsival · 2026-02-20T14:02:38Z

/azp run Xamarin.Android-PR

azure-pipelines · 2026-02-20T14:02:45Z

No pipelines are associated with this pull request.

simonrozsival mentioned this pull request Feb 12, 2026

[WIP][TrimmableTypeMap] Decompose _GenerateJavaStubs: shared tasks for trimmable path #10810

Draft

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-02-scanner branch 5 times, most recently from 627fef2 to 408d73d Compare February 13, 2026 09:25

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-03-generators branch 2 times, most recently from ba936c9 to 61ac7ed Compare February 13, 2026 10:35

simonrozsival mentioned this pull request Feb 13, 2026

[WIP][TrimmableTypeMap] Add [Export] support to TypeMap generators #10811

Draft

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-03-generators branch 2 times, most recently from ddddd2f to 83a50be Compare February 13, 2026 11:22

simonrozsival added Area: NativeAOT Issues that only occur when using NativeAOT. Area: CoreCLR Issues that only occur when using CoreCLR. copilot `copilot-cli` or other AIs were used to author this trimmable-type-map labels Feb 13, 2026

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-03-generators branch from 83a50be to 4e7d06c Compare February 13, 2026 17:12

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-02-scanner branch 8 times, most recently from 2388cf1 to e92938e Compare February 16, 2026 21:04

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-03-generators branch from 4e7d06c to 7088777 Compare February 16, 2026 22:25

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-02-scanner branch from e92938e to 9215de9 Compare February 18, 2026 15:49

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-03-generators branch from 7088777 to b9f33c9 Compare February 18, 2026 16:31

simonrozsival changed the base branch from dev/simonrozsival/trimmable-typemap-02-scanner to main February 18, 2026 16:31

simonrozsival changed the title ~~[TrimmableTypeMap] Add TypeMap assembly and JCW Java source generators~~ [TrimmableTypeMap] Add TypeMap assembly generators with model builder Feb 18, 2026

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-03-generators branch from b9f33c9 to 21a68db Compare February 18, 2026 17:08

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-03-generators branch 3 times, most recently from 4c8b459 to e3e4f05 Compare February 19, 2026 10:03

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-03-generators branch from e3e4f05 to 9449651 Compare February 19, 2026 10:09

simonrozsival and others added 2 commits February 19, 2026 11:33

simonrozsival force-pushed the dev/simonrozsival/trimmable-typemap-03-generators branch from d9bd575 to 163f892 Compare February 19, 2026 12:07

[TrimmableTypeMap] Normalize constructor native callback names

1a27ee0

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

simonrozsival added 3 commits February 20, 2026 12:04

Trigger CI rerun for Xamarin.Android-PR

2204d91

Retry all PR checks to refresh failing internal status context.\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

[CI] Throttle Linux MSBuild node count

4efc1cd

Add a Linux template parameter for MSBUILD_ARGS and set -m:2 in the public pipeline Linux build to reduce recurrent MSB4166/OOM failures.\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Merge branch 'main' into dev/simonrozsival/trimmable-typemap-03-gener…

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[TrimmableTypeMap] Add TypeMap proxy groundwork with CreateInstance#10808

[TrimmableTypeMap] Add TypeMap proxy groundwork with CreateInstance#10808
simonrozsival wants to merge 9 commits intomainfrom
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simonrozsival commented Feb 12, 2026 •

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Summary

Generator pipeline

Tests

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simonrozsival commented Feb 12, 2026 •

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