Short summary about most popular mappers for java appliacation.

1. Mapping options
by Ania Pietras

2. Why to use mappers?
- default settings -> less coding
- ‘global’ settings for handling NULLS, empty String ect.
- Simple conversions handling (lists, enums, different numeric types) ‘out of
the box’
- Centralization of mapping configuration in application

3. Available options
Source: http://stackoverflow.com/questions/1432764/any-tool-for-java-object-to-object-mapping/1432956
● Transmorph
● EZMorph
● Commons-BeanUtils
● Commons-Lang
● Commons-Convert
● Morph
● Lorentz
● Dozer
● ModelMapper
● OTOM
● Smooks
● MapStruct
● Orika
● JMapper

4. Available options
Library Dozer Orika JMapper
Version 5.5.1 1.4.6 1.4.2
Last release 04/2014 05/2015 09/2015
Configuration XML, annotation
(beta), JavaConfig
JavaConfig annotation, XML
Enum<>String yes yes no
Collections yes, + Map<>Pojo yes yes
Custom mappers yes, class/field yes, class/field yes, class/field

5. Dozer vs Orika vs JMapper

6. Dozer
● Reflection based (==slowly)
● Mapping from map to Object
● Develop since 2006r.
● Most popular
● Not actively maintained (152
issues on GitHub)
● stackOverflow: 1519 result
XML
ANNOTATION
JavaConfig

7. Orika
- Generates bytecode during first
mapping (first time is slow, then
faster)
- 27 open issues on GH
- Last commit 2 months ago
- stackOverflow: 211 results
- Developed since 2012
JavaConfig

8. Jmapper
- Generates bytecode during
application startup
- Last commit one month old
- 5 open issues on GH
- Dynamic converter declaration
(code snippets, including xml)
- Field mapping 1:n and n:1
- Support for flattening and
encapsulation
- StackOverflow: 19 results
- Developed since 2013
@GlobalJMap
ANNOTATIONS
XML