@GwtCompatible public interface Predicate<T>
The Predicates
class provides common predicates and related utilities.
See the Guava User Guide article on the use of Predicate
.
boolean apply(@Nullable T input)
input
. This method is generally
expected, but not absolutely required, to have the following properties:
Objects.equal
(a, b)
implies that predicate.apply(a) ==
predicate.apply(b))
.
NullPointerException
- if input
is null and this predicate does not accept null
argumentsboolean equals(@Nullable Object object)
Most implementations will have no reason to override the behavior of Object.equals(java.lang.Object)
.
However, an implementation may also choose to return true
whenever object
is a
Predicate
that it considers interchangeable with this one. "Interchangeable"
typically means that this.apply(t) == that.apply(t)
for all t
of type
T
). Note that a false
result from this method does not imply that the
predicates are known not to be interchangeable.
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