If I set compiler.source and compiler.target to 1.8 in maven.properties, I get this:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.2:compile (default-compile) on project xnio-api: Compilation failure [ERROR] /build/jboss-xnio-3.3.3/api/src/main/java/org/xnio/Option.java:[430,37] incompatible types: java.lang.Object cannot be converted to T
signature.asc
Description: OpenPGP digital signature
