What does one do when Hibernate is "finished" and feature complete and one needs new challenges? Right. One creates a new JVM language called Ceylon. On November 12, 2013, Ceylon 1.0.0 was finally released and we congratulate the whole team at Red Hat for their achievements in what looks like a very promising new JVM … Continue reading Top 10 Ceylon Language Features I Wish We Had In Java
Tag: covariance
The Dangers of Correlating Subtype Polymorphism with Generic Polymorphism
Java 5 has introduced generic polymorphism to the Java ecosystem. This has been a great addition to the Java language, even if we're all aware of the numerous caveats due to generic type erasure and the consequences thereof. Generic polymorphism (also known as parametric polymorphism) is usually maintained orthogonally to possibly pre-existing subtype polymorphism. A … Continue reading The Dangers of Correlating Subtype Polymorphism with Generic Polymorphism
The depths of Java: API leak exposed through covariance
Java can be very tricky some times, especially in API design. Let's have a look at a very interesting showcase. jOOQ strongly separates API from implementation. All API is in the org.jooq package, and public. Most implementation is in the org.jooq.impl package and package-private. Only factories and some dedicated base implementations are public. This allows … Continue reading The depths of Java: API leak exposed through covariance