This internal module adapts collection APIs introduced in Java 9 and 10 for the sanitizer's Java 8-compatible source. Java8Shim defines the adapter API, and ForJava8 provides the fallback implementation.

At runtime Java8Shim first tries the implementation from java10-shim and falls back to ForJava8 when that newer class cannot load, including on Java 8 and 9. Both shim modules are shaded into the published sanitizer JAR; neither is a separate dependency for library users or a supported public API.

Keep this module compatible with the repository's Java 8 source and bytecode target. Follow the build prerequisites (JDK 11 or newer), and run from the repository root:

./mvnw -pl java8-shim -am package

Changes to the shim should also be checked in the final shaded artifact with the full ./mvnw clean verify build.