org.grouplens.grapht.reflect

Interface QualifierMatcher

All Superinterfaces:

Comparable<QualifierMatcher>, com.google.common.base.Predicate<Annotation>, Serializable

public interface QualifierMatcher
extends com.google.common.base.Predicate<Annotation>, Comparable<QualifierMatcher>, Serializable

QualifierMatcher encapsulates the logic used to determine if a BindRule or ContextElementMatcher match a particular Qualifier. Common qualifier matching rules are:

1. Any qualifier
2. No qualifier
3. Annotation type
4. Annotation instance equality

All QualifierMatchers created by the same InjectSPI must be comparable, matchers from different SPIs do not need to be comparable.

Author:

GroupLens Research

Method Summary

Modifier and Type	Method and Description
boolean	apply(Annotation q) Return true if this matcher matches the given qualifier annotation.
int	getPriority() Get the priority of this matcher.
boolean	matches(Annotation q) Return true if this matcher matches the given qualifier annotation.

Methods inherited from interface com.google.common.base.Predicate

equals

Methods inherited from interface java.lang.Comparable

compareTo

Method Detail

matches

boolean matches(@Nullable
                Annotation q)

Return true if this matcher matches the given qualifier annotation. It can be assumed that the annotation type has been annotated with Qualifier. The qualifier will be null if the injection point being matched did not have a qualifier.

Parameters:

q - The qualifier to match

Returns:

True if matched

apply

boolean apply(@Nullable
              Annotation q)

Return true if this matcher matches the given qualifier annotation. It can be assumed that the annotation type has been annotated with Qualifier. The qualifier will be null if the injection point being matched did not have a qualifier.

Specified by:

apply in interface com.google.common.base.Predicate<Annotation>

Parameters:

q - The qualifier to match

Returns:

True if matched

getPriority

int getPriority()

Get the priority of this matcher. Lower priority values have precedence in selecting the final bind rule. All Grapht matchers have priorities of at least 0; negative priority values are reserved for custom extensions.

Returns:

The priority.