Package org.silverpeas.core.util.filter

Class EmptyFilterMatcher<T,U,V>

java.lang.Object

org.silverpeas.core.util.filter.FilterMatcher<T,U,V>

org.silverpeas.core.util.filter.EmptyFilterMatcher<T,U,V>

public class EmptyFilterMatcher<T,U,V>
extends FilterMatcher<T,U,V>

An empty filter matcher. It does nothing and the return result is an empty Optional instance.

Author:

mmoquillon

Method Summary

Modifier and Type	Method	Description
FilterMatcher<T,U,V>	matchFirst(Predicate<T> predicate, Function<U,V> function)	Plays the specified predicate against the criterion and applies the specified function if and only if the predicate is true.
Optional<V>	result()	Gets the result returned by the function associated with the first predicates that is true.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

matchFirst

public FilterMatcher<T,U,V> matchFirst(Predicate<T> predicate,
                                                   Function<U,V> function)

Description copied from class: FilterMatcher

Plays the specified predicate against the criterion and applies the specified function if and only if the predicate is true. If the criterion is true, the result is stored and the other next predicates aren't played. The result of the function cannot be null otherwise a AssertionError is thrown.

Overrides:

matchFirst in class FilterMatcher<T,U,V>

Parameters:

predicate - the predicate to match.

function - the function associated with the predicate and that returns a non-null computation result.

Returns:

itself.

result

public Optional<V> result()

Description copied from class: FilterMatcher

Gets the result returned by the function associated with the first predicates that is true.

Overrides:

result in class FilterMatcher<T,U,V>

Returns:

an Optional value. Empty means that no predicates were true.