Support configuring type conversion

[cinash]

trafficstars

The objects that we are mapping don't always have the same types of fields. For example, sometimes it's needed to perform type conversions:

1. from UUID to String
2. from Date/LocalDate to Long
3. between enum types

Would be best if such mappings would be configurable either in project properties (settings) or using some configuration file (whatever is easier)

[gejun123456]

so what about the field names, like from Date/LocalDate to Long, does they have the same field names? If they got same field names. i think this can be done automatically.