About guava-compatibility-agent

Guava compatibility agent which allows a subset of common APIs removed in older versions of guava to continue working at runtime, when a newer version of guava is available on the classpath.

Reconstituted APIs:

• MoreExecutors.sameThreadExecutor(): Delegates to the modern MoreExecutors.newDirectExecutorService()
• Objects.firstNonNull(first, second): Delegates to the modern MoreObjects.firstNonNull(first, second)
• Futures.transform(future, function) -> Delegates to the modern Futures.transform(future, function, MoreExecutors.directExecutor())
• Futures.transform(future, asyncFunction, exec) -> Delegates to the modern Futures.transformAsync(future, asyncFunction, exec)
• Futures.transform(future, asyncFunction) -> Delegates to the modern Futures.transformAsync(future, asyncFunction, MoreExecutors.directExecutor())
• Futures.addCallback(future, callback) -> Futures.addCallback(future, callback, MoreExecutors.directExecutor())
• Futures.withFallback(future, fallback, executor) -> Futures.catchingAsync(future, Throwable.class, fallback, executor)
• Futures.withFallback(future, fallback) -> Futures.catchingAsync(future, Throwable.class, fallback, MoreExecutors.directExecutor())

Not handled yet

• Objects.toStringHelper and overloads: This requires us to define a duplicate of MoreObjects$ToStringHelper which is a bit more involved. Unclear precisely how this would work.
• Iterators.emptyIterator() signature returns the UnmodifiableIterator type, should be trivial to handle.
• Many, many more.