- All Known Subinterfaces:
- All Known Implementing Classes:
@GwtCompatible public interface Function<F,T>Determines an output value based on an input value.
Functionsclass provides common functions and related utilites.
See the Guava User Guide article on the use of
- 2.0 (imported from Google Collections Library)
applyReturns the result of applying this function to
input. This method is generally expected, but not absolutely required, to have the following properties:
- Its execution does not cause any observable side effects.
- The computation is consistent with equals; that is,
(a, b)implies that
inputis null and this function does not accept null arguments
equalsIndicates whether another object is equal to this function.
Most implementations will have no reason to override the behavior of
Object.equals(java.lang.Object). However, an implementation may also choose to return
Functionthat it considers interchangeable with this one. "Interchangeable" typically means that
Objects.equal(this.apply(f), that.apply(f))is true for all
F. Note that a
falseresult from this method does not imply that the functions are known not to be interchangeable.