org.grouplens.grapht.reflect

Class Qualifiers

java.lang.Object

org.grouplens.grapht.reflect.Qualifiers

public final class Qualifiers
extends Object

Utilities related to Qualifier implementations.

Author:

GroupLens Research

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	isQualifier(Class<? extends Annotation> type) Return true or false whether or not the annotation type represents a Qualifier
static QualifierMatcher	match(Annotation annot)
static QualifierMatcher	match(Class<? extends Annotation> annotType)
static QualifierMatcher	matchAny()
static QualifierMatcher	matchDefault() The default qualifier matcher.
static QualifierMatcher	matchNone()

Methods inherited from class java.lang.Object

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

Method Detail

isQualifier

public static boolean isQualifier(Class<? extends Annotation> type)

Return true or false whether or not the annotation type represents a Qualifier

Parameters:

type - The annotation type

Returns:

True if the annotation is a Qualifier or parameter

Throws:

NullPointerException - if the type is null

matchDefault

public static QualifierMatcher matchDefault()

The default qualifier matcher. This is currently the any matcher.

Returns:

A QualifierMatcher that matches using the default policy.

matchAny

public static QualifierMatcher matchAny()

Returns:

A QualifierMatcher that matches any qualifier

matchNone

public static QualifierMatcher matchNone()

Returns:

A QualifierMatcher that matches only the null qualifier

match

public static QualifierMatcher match(Class<? extends Annotation> annotType)

Parameters:

annotType - Annotation type class to match; null to match only the lack of a qualifier.

Returns:

A QualifierMatcher that matches any annotation of the given class type.

match

public static QualifierMatcher match(@Nonnull
                     Annotation annot)

Parameters:

annot - Annotation instance to match, or null to match only the lack of a qualifier.

Returns:

A QualifierMatcher that matches annotations equaling annot