Java to Scala conversion
Scalagen is a Java to Scala conversion tool. It uses a Java based parser for Java sources and provides modular transformation of the AST to match Scala idioms. The resulting transformed AST is serialized into Scala format.
Here is a list of example Java sources which have been successfully converted by Scalagen: https://github.com/mysema/scalagen/tree/master/scalagen/src/test/scala/com/mysema/examples
Scalagen has also been tested on our own projects such as Querydsl, RDFBean, Codegen and some customer projects.
Scalagen provides direct Maven support via a plugin. You can use it directly via the command line like this
mvn com.mysema.scalagen:scalagen-maven-plugin:0.2.2:main -DtargetFolder=target/scala
and for test sources
mvn com.mysema.scalagen:scalagen-maven-plugin:0.2.2:test -DtargetFolder=target/scala
Here is the snippet for an explicit configuration in a POM:
<plugin> <groupId>com.mysema.scalagen</groupId> <artifactId>scalagen-maven-plugin</artifactId> <version>0.2.2</version> </plugin>
To convert main sources run
and to convert test sources run
The conversion results are to be seen as a starting point for the Java to Scala conversion. Some elements are not transformed correctly for various reasons and will need manual intervention.
Scalagen development instructions are here https://github.com/mysema/scalagen/wiki/Scalagen-development