Package io.micronaut.inject.qualifiers

Class FilteringQualifier<T>

java.lang.Object

io.micronaut.inject.qualifiers.FilteringQualifier<T>

Type Parameters:

T - The qualifier type

All Implemented Interfaces:

Qualifier<T>

Direct Known Subclasses:

AnyQualifier, EachBeanQualifier, InterceptorBindingQualifier, PrimaryQualifier, TypeAnnotationQualifier, TypeArgumentQualifier

@Internal
public abstract class FilteringQualifier<T>
extends Object
implements Qualifier<T>

A variation of Qualifier that is a simple filter.

Since:

4.2.0

Author:

Denis Stepanov

Field Summary

Fields inherited from interface io.micronaut.context.Qualifier

PRIMARY

Constructor Summary

Constructors

Constructor	Description
FilteringQualifier()

Method Summary

Modifier and Type	Method	Description
boolean	doesQualify(Class<T> beanType, Collection<? extends BeanType<T>> candidates)	Check if at least one candidate qualifies.
<BT extends BeanType<T>> Collection<BT>	filter(Class<T> beanType, Collection<BT> candidates)	Filter the candidates.
<BT extends BeanType<T>> Stream<BT>	reduce(Class<T> beanType, Stream<BT> candidates)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.micronaut.context.Qualifier

contains, doesQualify, qualify

Constructor Details

FilteringQualifier

public FilteringQualifier()

Method Details

reduce

public <BT extends BeanType<T>> Stream<BT> reduce(Class<T> beanType,
 Stream<BT> candidates)

Specified by:

reduce in interface Qualifier<T>

Type Parameters:

BT - The bean type subclass

Parameters:

beanType - The bean type

candidates - The candidates

Returns:

The qualified candidate or null it cannot be qualified

doesQualify

public boolean doesQualify(Class<T> beanType,
 Collection<? extends BeanType<T>> candidates)

Description copied from interface: Qualifier

Check if at least one candidate qualifies.

Specified by:

doesQualify in interface Qualifier<T>

Parameters:

beanType - The bean type

candidates - The candidates

Returns:

true if qualifies

filter

public <BT extends BeanType<T>> Collection<BT> filter(Class<T> beanType,
 Collection<BT> candidates)

Description copied from interface: Qualifier

Filter the candidates.

Specified by:

filter in interface Qualifier<T>

Type Parameters:

BT - The bean type subclass

Parameters:

beanType - The bean type

candidates - The candidates

Returns:

The filtered candidates