Module net.shibboleth.utilities.java.support

Package net.shibboleth.utilities.java.support.logic

Class StrategyIndirectedPredicate<T1,T2>

java.lang.Object

net.shibboleth.utilities.java.support.logic.StrategyIndirectedPredicate<T1,T2>

Type Parameters:

T1 - type of object used as the source of the data to compare

T2 - type of object being compared

All Implemented Interfaces:

Predicate<T1>, Predicate<T1>

public class StrategyIndirectedPredicate<T1,T2>
extends Object
implements Predicate<T1>

Generic predicate that checks a candidate Object returned by a lookup function against an injected predicate.

Field Summary

Fields

Modifier and Type	Field	Description
private Function<T1,T2>	objectLookupStrategy	Lookup strategy for object.
private Predicate<T2>	predicate	Predicate to apply to indirected object.

Constructor Summary

Constructors

Constructor	Description
StrategyIndirectedPredicate(Function<T1,T2> objectStrategy, Collection<T2> collection)	Constructor that simplifies constructing a test for containment in a collection, which is a common use case.
StrategyIndirectedPredicate(Function<T1,T2> objectStrategy, Predicate<T2> pred)	Constructor.

Method Summary

Modifier and Type	Method	Description
static <T1,T2> StrategyIndirectedPredicate<T1,T2>	forCollection(Function<T1,T2> objectStrategy, Collection<T2> collection)	Factory method for collection-based constructor.
static <T1,T2> StrategyIndirectedPredicate<T1,T2>	forPredicate(Function<T1,T2> objectStrategy, Predicate<T2> pred)	Factory method for predicate-based constructor.
boolean	test(T1 input)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Predicate

and, negate, or

Methods inherited from interface net.shibboleth.utilities.java.support.logic.Predicate

apply

Field Detail

objectLookupStrategy

@Nonnull
private final Function<T1,T2> objectLookupStrategy

Lookup strategy for object.

predicate

@Nonnull
private final Predicate<T2> predicate

Predicate to apply to indirected object.

Constructor Detail

StrategyIndirectedPredicate

public StrategyIndirectedPredicate(@ParameterName(name="objectStrategy") @Nonnull
                                   Function<T1,T2> objectStrategy,
                                   @ParameterName(name="pred") @Nonnull
                                   Predicate<T2> pred)

Constructor.

Parameters:

objectStrategy - lookup strategy for object

pred - the predicate to apply

StrategyIndirectedPredicate

public StrategyIndirectedPredicate(@ParameterName(name="objectStrategy") @Nonnull
                                   Function<T1,T2> objectStrategy,
                                   @ParameterName(name="collection") @Nonnull
                                   Collection<T2> collection)

Constructor that simplifies constructing a test for containment in a collection, which is a common use case.

Parameters:

objectStrategy - lookup strategy for object

collection - a collection to test for containment

Method Detail

test

public boolean test(@Nullable
                    T1 input)

Specified by:

test in interface Predicate<T1>

forPredicate

@Nonnull
public static <T1,T2> StrategyIndirectedPredicate<T1,T2> forPredicate(@Nonnull
                                                                                  Function<T1,T2> objectStrategy,
                                                                                  @Nonnull
                                                                                  Predicate<T2> pred)

Factory method for predicate-based constructor.

Type Parameters:

T1 - type of object used as the source of the data to compare

T2 - type of object being compared

Parameters:

objectStrategy - the lookup strategy for object

pred - the predicate to apply

Returns:

a suitably constructed predicate

Since:

7.3.0

forCollection

@Nonnull
public static <T1,T2> StrategyIndirectedPredicate<T1,T2> forCollection(@Nonnull
                                                                                   Function<T1,T2> objectStrategy,
                                                                                   @Nonnull
                                                                                   Collection<T2> collection)

Factory method for collection-based constructor.

Type Parameters:

T1 - type of object used as the source of the data to compare

T2 - type of object being compared

Parameters:

objectStrategy - the lookup strategy for object

collection - a collection to test for containment

Returns:

a suitably constructed predicate

Since:

7.3.0