JCA - Adapter pattern

Posted on 2006-11-25
Last Modified: 2008-02-26
Java connector Architecture follows Adapter pattern.

Any explanation on how this occurs with sample code would be helpful

simple explanation in laymans terms plzz!

Question by:jaggernat
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Accepted Solution

Ajay-Singh earned 465 total points
ID: 18013587
These are 2 key features adapter provides:
    1. Allows two or more previously incompatible objects to interact.
    2. Allows reusability of existing functionality.

JCA allows you to interact with the database, other resources seamlessly. The JCA interface is defined but the actual source may not follow that. So in order to make it work, we the source defines an adapter that interacts with the source.
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Author Comment

ID: 18014490
I get the thoery. simple example code would help.

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ID: 18014621
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Author Comment

ID: 18014651
we have a adaptor class, a client and an adaptee.
the client is trying to call an adaptee which is modified by the adaptor. right?
not exactly sure what the role of client and the adaptee is.

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Expert Comment

ID: 18014873
> the client is trying to call an adaptee which is modified by the adaptor. right?

> not exactly sure what the role of client and the adaptee is.
client has an interface and adapter doesn't follow that interface. In order to interact with the client, adapter follows the client interface and modify the adpatee (calls its methods) when client wants to do something.
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Author Comment

ID: 18014926
In Adapter pattern , an adapter wraps a class(target class) in such a way that the client class can call the adaptor to use the target class.
Client --> Adapter/ wrapper class --> Adaptee ( target).
So the client doesnt calls the target object(adaptee) which is an direclty, but invokes the adaptee through the Adapter.

above is my description of adapter pattern. Is it right?
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Expert Comment

ID: 18017108

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