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@ctxo/lang-java

v0.8.1

Published

Ctxo Java language plugin (ctxo-jdt-analyzer + tree-sitter, full tier)

Vulnerabilities

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Links

Git

Maintainers

ahankendiahankendi

Keywords

ctxoctxo-pluginlanguage-pluginjavatree-sitter

Readme

@ctxo/lang-java

Java language plugin for Ctxo. Gives AI coding assistants dependency-aware context for Java codebases via two tiers.

Tiers

| Tier | Engine | Emits | When active | |---|---|---|---| | Syntax (baseline) | tree-sitter-java | symbols, imports/extends/implements edges, cyclomatic complexity | always | | Full | Eclipse JDT Core (ctxo-jdt-analyzer JAR) | resolved calls/uses edges, cross-file symbol IDs, generics, partial bindings | JRE 17+ present and analyzer JAR acquired (opt-in) |

The syntax tier ships in the package and needs zero setup. The full tier requires a Java runtime (JRE 17+) and the analyzer JAR; without them the plugin degrades cleanly to the syntax tier — the index never blocks.

Install

ctxo install java          # adds @ctxo/lang-java to your project

Detection is automatic: a pom.xml, build.gradle, build.gradle.kts, or .java files flag the project as Java.

Full tier

The full tier uses Eclipse JDT Core, packaged as a standalone ctxo-jdt-analyzer.jar (~15 MB). Per ADR-014:

  • Runtime: a single JDT build that runs on JRE 17 and analyzes source levels Java 8 through 21 (source level is independent of the running JRE). JRE 21 is detected and used if present; a dedicated JRE-21 tier is deferred for future re-evaluation.
  • Distribution: the JAR is a prebuilt artifact, not built on your machine. It is acquired opt-in (never a silent download) and verified by SHA-256.
  • Local override: point the plugin at a specific JAR with the CTXO_JDT_ANALYZER_JAR environment variable (absolute path). Useful for development, air-gapped setups, and CI.
  • Java location: the plugin resolves java via CTXO_JAVA_HOME -> JAVA_HOME -> PATH.

Classpath resolution

For accurate binding resolution the analyzer locates dependency JARs in order: explicit override -> IDE metadata (.classpath, .idea/libraries) -> local repository scan (~/.m2, Gradle cache, parsed from pom.xml / build.gradle) -> empty (intra-file bindings only). Build tools (mvn/gradle) are never executed by default.

Symbol & edge mapping

Java constructs map onto Ctxo's symbol/edge kinds without extending the plugin API: enum -> type, record -> class, @interface -> interface, constructors -> method, fields -> variable.

License

MIT