Package net.shibboleth.utilities.java.support.resolver

Class ResolverSupport

java.lang.Object

net.shibboleth.utilities.java.support.resolver.ResolverSupport

public final class ResolverSupport
extends Object

Support class for resolver implementations.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ResolverSupport()	Constructor.

Method Summary

Modifier and Type	Method	Description
static <T> Iterable<T>	getFilteredIterable(Iterable<T> candidates, Set<Predicate<T>> predicates, boolean satisfyAny, boolean onEmptyPredicatesReturnEmpty)	Return a filtered Iterable of the specified candidates based on the supplied set of Predicate and the satisfyAny flag.
static <T,E extends Predicate<T>> Set<Predicate<T>>	getPredicates(CriteriaSet criteriaSet, Class<E> predicateCriterionType, CriterionPredicateRegistry<T> registry)	Obtain a set of Predicate based on a CriteriaSet.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResolverSupport

private ResolverSupport()

Constructor.

Method Detail

getPredicates

@Nonnull
public static <T,E extends Predicate<T>> Set<Predicate<T>> getPredicates(@Nullable
                                                                               CriteriaSet criteriaSet,
                                                                               @Nullable
                                                                               Class<E> predicateCriterionType,
                                                                               @Nullable
                                                                               CriterionPredicateRegistry<T> registry)
                                                                        throws ResolverException

Obtain a set of Predicate based on a CriteriaSet.

Type Parameters:

T - the type of target which the returned predicates can evaluate

E - the type of criterion predicates to extract directly from the criteria set

Parameters:

criteriaSet - the criteria set to evaluate

predicateCriterionType - the optional type to evaluate and extract directly from the criteria set

registry - the optional registry of mappings from Criterion to Predicate

Returns:

a set of predicates, possibly empty

Throws:

ResolverException - if there is a fatal error evaluating the criteria set

getFilteredIterable

@Nonnull
public static <T> Iterable<T> getFilteredIterable(@Nullable
                                                  Iterable<T> candidates,
                                                  @Nullable
                                                  Set<Predicate<T>> predicates,
                                                  boolean satisfyAny,
                                                  boolean onEmptyPredicatesReturnEmpty)

Return a filtered Iterable of the specified candidates based on the supplied set of Predicate and the satisfyAny flag.

Type Parameters:

T - the type of target candidates

Parameters:

candidates - the candidates to filter

predicates - the predicates with which to filter

satisfyAny - if true the predicates will be logically OR-ed, otherwise they are logically AND-ed

onEmptyPredicatesReturnEmpty - if true and no predicates are supplied, then return an empty iterable; otherwise return the original input candidates

Returns:

the filtered iteration of the candidates