Class Qualifiers

java.lang.Object

org.microbean.assign.Qualifiers

public class Qualifiers
extends Object

A utility class for working with qualifiers.

This class is currently not used by other classes in this package. It may be useful in a variety of dependency injection systems.

Author:

Laird Nelson

See Also:

• Attributes

Constructor Summary

Constructors

Constructor	Description
Qualifiers()	Creates a new Qualifiers.

Method Summary

Modifier and Type	Method	Description
List<Attributes>	normalize(List<Attributes> list)	Returns an immutable List of Attributess that is equal to the supplied List.
Attributes	normalize(Attributes a)	Returns an Attributes that is equal to the supplied Attributes.
Attributes	qualifier()	Returns the qualifier (meta-) qualifier.
boolean	qualifier(Attributes q)	Returns true if and only if the supplied Attributes is an Attributes that can be used to designate other Attributes as qualifiers.
List<Attributes>	qualifiers()	Returns an immutable List consisting solely of the qualifier (meta-) qualifier.
List<Attributes>	qualifiers(Collection<? extends Attributes> c)	Returns an unmodifiable List consisting only of those Attributes in the supplied Collection that are qualifiers.

Methods inherited from class Object

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

Constructor Details

Qualifiers

public Qualifiers()

Creates a new Qualifiers.

Method Details

normalize

public Attributes normalize(Attributes a)

Returns an Attributes that is equal to the supplied Attributes.

The returned Attributes may be the supplied Attributes or a different instance.

Parameters:

a - an Attributes; must not be null

Returns:

an Attributes that is equal to the supplied Attributes; never null

Throws:

NullPointerException - if a is null

normalize

public List<Attributes> normalize(List<Attributes> list)

Returns an immutable List of Attributess that is equal to the supplied List.

The returned List may be the supplied List or a different instance.

Parameters:

list - a List of Attributess; must not be null

Returns:

an immutable List of Attributess that is equal to the supplied List; never null

Throws:

NullPointerException - if list is null

qualifier

public Attributes qualifier()

Returns the qualifier (meta-) qualifier.

Returns:

the qualifier (meta-) qualifier; never null

qualifier

public boolean qualifier(Attributes q)

Returns true if and only if the supplied Attributes is an Attributes that can be used to designate other Attributes as qualifiers.

Parameters:

q - an Attributes; must not be null

Returns:

true if and only if the supplied Attributes is an Attributes that can be used to designate other Attributes as qualifiers

Throws:

NullPointerException - if q is null

qualifiers

public List<Attributes> qualifiers()

Returns an immutable List consisting solely of the qualifier (meta-) qualifier.

Returns:

an immutable List; never null

See Also:

• qualifier()

qualifiers

public List<Attributes> qualifiers(Collection<? extends Attributes> c)

Returns an unmodifiable List consisting only of those Attributes in the supplied Collection that are qualifiers.

Parameters:

c - a Collection of Attributess; must not be null

Returns:

an unmodifiable List consisting only of those Attributess in the supplied Collection that are qualifiers; never null

Throws:

NullPointerException - if c is null