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 and Description
private	ResolverSupport() Constructor.

Method Summary

Modifier and Type	Method and Description
static <T> Iterable<T>	getFilteredIterable(Iterable<T> candidates, Set<com.google.common.base.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 com.google.common.base.Predicate<T>> Set<com.google.common.base.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 com.google.common.base.Predicate<T>> Set<com.google.common.base.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<com.google.common.base.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