com.tavianator.sangria.core

Class PotentialAnnotation

java.lang.Object

com.tavianator.sangria.core.PotentialAnnotation

public abstract class PotentialAnnotation
extends Object

A record of stored annotations, perfect for builders with annotatedWith() methods.

Since:

1.1

Version:

1.2

Author:

Tavian Barnes (tavianator@tavianator.com)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	PotentialAnnotation.Visitor<T> A visitor interface to examine a PotentialAnnotation's annotation, if it exists.

Method Summary

Modifier and Type	Method and Description
abstract <T> T	accept(PotentialAnnotation.Visitor<T> visitor) Accept a PotentialAnnotation.Visitor.
PotentialAnnotation	annotatedWith(Annotation annotation) Add an annotation.
PotentialAnnotation	annotatedWith(Class<? extends Annotation> annotationType) Add an annotation.
abstract boolean	equals(Object o)
static PotentialAnnotation	from(Key<?> key) Extract the annotation from a Key.
<T> Key<T>	getKey(Class<T> type) Create a Key with the given type and the stored annotation.
abstract <T> Key<T>	getKey(TypeLiteral<T> type) Create a Key with the given type and the stored annotation.
abstract boolean	hasAnnotation()
abstract int	hashCode()
static PotentialAnnotation	none()
abstract String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

none

public static PotentialAnnotation none()

Returns:

A PotentialAnnotation with no annotation.

from

public static PotentialAnnotation from(Key<?> key)

Extract the annotation from a Key.

Parameters:

key - The Key whose annotation to use, if any.

Returns:

A PotentialAnnotation with the annotation from key.

Since:

1.2

annotatedWith

public PotentialAnnotation annotatedWith(Class<? extends Annotation> annotationType)

Add an annotation.

Parameters:

annotationType - The annotation type to add.

Returns:

A new PotentialAnnotation associated with the given annotation type.

Throws:

CreationException - If an annotation is already present.

annotatedWith

public PotentialAnnotation annotatedWith(Annotation annotation)

Add an annotation.

Parameters:

annotation - The annotation instance to add.

Returns:

A new PotentialAnnotation associated with the given annotation instance.

Throws:

CreationException - If an annotation is already present.

hasAnnotation

public abstract boolean hasAnnotation()

Returns:

Whether an annotation is present.

getKey

public <T> Key<T> getKey(Class<T> type)

Create a Key with the given type and the stored annotation.

Type Parameters:

T - The type of the key to create.

Parameters:

type - The type of the key to create.

Returns:

A Key.

getKey

public abstract <T> Key<T> getKey(TypeLiteral<T> type)

Create a Key with the given type and the stored annotation.

Type Parameters:

T - The type of the key to create.

Parameters:

type - The type of the key to create.

Returns:

A Key.

accept

public abstract <T> T accept(PotentialAnnotation.Visitor<T> visitor)

Accept a PotentialAnnotation.Visitor.

Type Parameters:

T - The type for the visitor to return.

Parameters:

visitor - The visitor to accept.

Returns:

The value produced by the visitor.

equals

public abstract boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public abstract int hashCode()

Overrides:

hashCode in class Object

toString

public abstract String toString()

Overrides:

toString in class Object