Shri,
You can find plenty of examples on how to use EM on the client (see for example GlassFish persistence page
https://glassfish.dev.java.net/javaee5/persistence/persistence-example.html). But to be able to load a lazy field directly from the client, you'll need a jdbc connection. If you want to avoid all of it, you'll need a layer between the client and the entity. You might want to consider an extended persistence context to be open for a duration of client access, if that duration is not too long (otherwise keeping an EM open will keep the associated resources from being used by others).
Regards,
-marina
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