Object mapper

Scenario:
You need to upgrade the application tier of a legacy system. The source code is available, but the new functionality is not supposed to be altered.

Possible architecture:
Build the new functionality in a new java application. Connect to the old functionality by using an object mapper tool.

Pros:

• Object based access to the Legacy System
• Not limited to the interface. Direct access to objects in the application tier or EIS tier is also possible.

Cons:

• Lots of coding
• The source code of the legacy system must be available

Object mapper
Tool to create proxy objects that access legacy system functions and make them available in an object-oriented form. Object mapping tools can be used if you choose to ignore the existing legacy interface and access the underlying tiers directly.