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Design to invoke correct handler

Anjali S Sharma
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I have a class called "DmsCheckinDoc". This class will invoke another class based on the "appName" parameter passed to it. If parameter passed is "cobs" then class "CobsHandler" will be invoked. If parameter passed in "dobs" then "DobsHandler" will be invoked.

The "DmsCheckinDoc" looks something like this

The decision as to which handler class to invoke is there in "DmsCheckinFactory". The lookup method finds out the handler class (from a properties file) based on the appName parameter. The "DmsCheckinFactory" looks like this

One of the handler class looks something like this

The interface implemented by CobsHandler looks like this

Can someone please let me know if the above approach is correct. Given these requirements, am I implementing the design pattern correctly?

Thank you
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