I'd like to think I'm pretty comfortable with Java and generics but I recently came across this bit of Java code and it stopped me in my tracks :

public abstract class AnnotationBasedPersistentProperty<P extends PersistentProperty<P>> extends AbstractPersistentProperty<P> {..}

This class is internal to the Spring Data framework's Repository Support which removes the need to write boilerplate code when implementing a data access layer and also provides a common programming model for mapping domain objects and managing data access to any type of persistent store.  Spring Data's  current repository implementations include relational databases (JPA), Gemfire,MongoDB, Neo4.

Fortunately, if you use Spring Data in your Java…

Spring Integration scripting support, available in the 2.1 release, builds upon the Groovy scripting support introduced in 2.0.  If you are familiar with Spring Integration, consider scripting support as another tool in your toolbox that you will find useful in certain situations.  If you have existing code written in languages such as Groovy, Python, Ruby, or Javascript and need to integrate them with each other or into a Java application,  Spring Integration provides a simple way to do this.  Whatever the case, this post covers the basics to get you started using your favorite scripting…