Package org.perfectable.introspection.query

Interface AnnotationFilter

All Known Subinterfaces:

AnnotationFilter.Singular<A>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface AnnotationFilter

Predicate-like interface for annotations on AnnotatedElement.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	AnnotationFilter.Singular<A extends Annotation>	Concretization of filters that only match when there's a specified annotation present on element.

Field Summary

Fields

Modifier and Type	Field	Description
static AnnotationFilter	ABSENT	Filter that matches only elements that doesnt have annotations.
static AnnotationFilter	ACCEPTING	Filter that matches any element.
static AnnotationFilter	REJECTING	Filter that doesn't match any element.

Method Summary

Modifier and Type	Method	Description
default AnnotationFilter	and(AnnotationFilter other)	Creates conjunction between this and provided filter.
boolean	matches(AnnotatedElement element)	Function method that checks element.
default AnnotationFilter	negated()	Creates filter negation.
default AnnotationFilter	or(AnnotationFilter other)	Creates disjunction between this and provided filter.
static <A extends Annotation> AnnotationFilter.Singular<A>	single(Class<A> annotationClass)	Returns filter that requires specified annotation by type to be present on element to match.

Field Detail

ACCEPTING

static final AnnotationFilter ACCEPTING

Filter that matches any element.

REJECTING

static final AnnotationFilter REJECTING

Filter that doesn't match any element.

ABSENT

static final AnnotationFilter ABSENT

Filter that matches only elements that doesnt have annotations.

Method Detail

single

static <A extends Annotation> AnnotationFilter.Singular<A> single(Class<A> annotationClass)

Returns filter that requires specified annotation by type to be present on element to match.

Further filtering can be done with AnnotationFilter.Singular.andMatching(java.util.function.Predicate<? super A>).

Type Parameters:

A - annotation type

Parameters:

annotationClass - type of annotation to look for

Returns:

filter for single annotation of speciefied type

matches

boolean matches(AnnotatedElement element)

Function method that checks element.

Parameters:

element - element to test

Returns:

if element matches filter

and

default AnnotationFilter and(AnnotationFilter other)

Creates conjunction between this and provided filter.

Parameters:

other - additional filter to be checked

Returns:

filter that matches only when this and other filter matches

or

default AnnotationFilter or(AnnotationFilter other)

Creates disjunction between this and provided filter.

Parameters:

other - additional filter to be checked

Returns:

filter that matches whenever this or other filter matches

negated

default AnnotationFilter negated()

Creates filter negation.

Returns:

filter that matches only when this filter doesn't