Xbase can add a powerful Java-like expression language to your DSL, and by implementing the model inferrer, you will automatically reuse the Xbase Java type system implementation and the generation of Java code. This does not imply that all the concepts described in all the previous chapters (validation, code generation, scoping, and so on) are useless. In fact, knowing the main concepts underlying Xtext is required to effectively implement a DSL even when using Xbase. Moreover, in case you need to modify or add expressions to a DSL that uses Xbase, you may have to provide a custom scoping and validation as well.
When using Xbase, your DSL will be tightly coupled with Java, which might not always be what you need. Your DSL could be used only for writing specifications or simpler structures, and in that case, you will not need Xbase expressions; these would only add unwanted complexity. Alternatively, your DSL might not be bound to Java and might require code generation into another...
