Creating and deploying a custom QueryFunction class

Generating the Eclipse project for the QueryFunction class
The Component SDK includes a script to generate the Eclipse project for the QueryFunction class.

Implementing a custom QueryFunction class
After you create your new QueryFunction class, you then implement it.

Building and deploying a custom QueryFunction class
When you have finished development on your custom QueryFunction class, you build it, then add the resulting .jar file to the .ear file.

Adding a custom QueryFunction to a custom component project
If you just want to use a custom QueryFunction in a specific custom component, you add its .jar file to the component's Eclipse build path.