GETL
ETL engine based on Groovy
... classes.
GETL taken into account when developing ideas and following requirements:
1. The simpler the class hierarchy, the easier solution;
2. The data structures tend to change over time, or not be known in advance, working with them must be maintained;
3. All routine work ETL should be automated wherever possible;
4. Compiling the code on the fly bail speed and reserve for the optimization;
5. Sophisticated class hierarchy guarantee easy connection of other open source solutions.