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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package javafx.util;
/**
* The Callback interface is designed to allow for a common, reusable interface
* to exist for defining APIs that requires a call back in certain situations.
*
* Callback is defined with two generic parameters: the first parameter
* specifies the type of the object passed in to the call method,
* with the second parameter specifying the return type of the method.
*
* @param
The type of the argument provided to the call method.
* @param The type of the return type of the call method.
* @since JavaFX 2.0
*/
public interface Callback {
/**
* The call method is called when required, and is given a
* single argument of type P, with a requirement that an object of type R
* is returned.
*
* @param param The single argument upon which the returned value should be
* determined.
* @return An object of type R that may be determined based on the provided
* parameter value.
*/
public R call(P param);
}