@Beta public final class Parameter extends Object implements AnnotatedElement
Modifier and Type | Method and Description |
---|---|
boolean |
equals(@Nullable Object obj)
Indicates whether some other object is "equal to" this one.
|
AnnotatedType |
getAnnotatedType() |
<A extends Annotation> |
getAnnotation(Class<A> annotationType)
Returns this element's annotation for the specified type if
such an annotation is present, else null.
|
Annotation[] |
getAnnotations()
Returns annotations that are present on this element.
|
<A extends Annotation> |
getAnnotationsByType(Class<A> annotationType)
Returns annotations that are associated with this element.
|
<A extends Annotation> |
getDeclaredAnnotation(Class<A> annotationType)
Returns this element's annotation for the specified type if
such an annotation is directly present, else null.
|
Annotation[] |
getDeclaredAnnotations()
Returns annotations that are directly present on this element.
|
<A extends Annotation> |
getDeclaredAnnotationsByType(Class<A> annotationType)
Returns this element's annotation(s) for the specified type if
such annotations are either directly present or
indirectly present.
|
Invokable<?,?> |
getDeclaringInvokable()
Returns the
Invokable that declares this parameter. |
TypeToken<?> |
getType()
Returns the type of the parameter.
|
int |
hashCode()
Returns a hash code value for the object.
|
boolean |
isAnnotationPresent(Class<? extends Annotation> annotationType)
Returns true if an annotation for the specified type
is present on this element, else false.
|
String |
toString()
Returns a string representation of the object.
|
public Invokable<?,?> getDeclaringInvokable()
Invokable
that declares this parameter.public boolean isAnnotationPresent(Class<? extends Annotation> annotationType)
java.lang.reflect.AnnotatedElement
The truth value returned by this method is equivalent to:
getAnnotation(annotationClass) != null
The body of the default method is specified to be the code above.
isAnnotationPresent
in interface AnnotatedElement
annotationType
- the Class object corresponding to the
annotation typepublic <A extends Annotation> A getAnnotation(Class<A> annotationType)
java.lang.reflect.AnnotatedElement
getAnnotation
in interface AnnotatedElement
A
- the type of the annotation to query for and return if presentannotationType
- the Class object corresponding to the
annotation typepublic Annotation[] getAnnotations()
java.lang.reflect.AnnotatedElement
getAnnotations
in interface AnnotatedElement
public <A extends Annotation> A[] getAnnotationsByType(Class<A> annotationType)
java.lang.reflect.AnnotatedElement
AnnotatedElement.getAnnotation(Class)
is that this method detects if its argument is a repeatable
annotation type (JLS 9.6), and if so, attempts to find one or
more annotations of that type by "looking through" a container
annotation.
The caller of this method is free to modify the returned array; it will
have no effect on the arrays returned to other callers.getAnnotationsByType
in interface AnnotatedElement
A
- the type of the annotation to query for and return if presentannotationType
- the Class object corresponding to the
annotation typepublic Annotation[] getDeclaredAnnotations()
java.lang.reflect.AnnotatedElement
getDeclaredAnnotations
in interface AnnotatedElement
public <A extends Annotation> A getDeclaredAnnotation(Class<A> annotationType)
java.lang.reflect.AnnotatedElement
getDeclaredAnnotation
in interface AnnotatedElement
A
- the type of the annotation to query for and return if directly presentannotationType
- the Class object corresponding to the
annotation typepublic <A extends Annotation> A[] getDeclaredAnnotationsByType(Class<A> annotationType)
java.lang.reflect.AnnotatedElement
AnnotatedElement.getDeclaredAnnotation(Class)
is that this method detects if its
argument is a repeatable annotation type (JLS 9.6), and if so,
attempts to find one or more annotations of that type by "looking
through" a container annotation if one is present.
The caller of this method is free to modify the returned array; it will
have no effect on the arrays returned to other callers.getDeclaredAnnotationsByType
in interface AnnotatedElement
A
- the type of the annotation to query for and return
if directly or indirectly presentannotationType
- the Class object corresponding to the
annotation typepublic AnnotatedType getAnnotatedType()
public boolean equals(@Nullable Object obj)
java.lang.Object
The equals
method implements an equivalence relation
on non-null object references:
x
, x.equals(x)
should return
true
.
x
and y
, x.equals(y)
should return true
if and only if
y.equals(x)
returns true
.
x
, y
, and z
, if
x.equals(y)
returns true
and
y.equals(z)
returns true
, then
x.equals(z)
should return true
.
x
and y
, multiple invocations of
x.equals(y)
consistently return true
or consistently return false
, provided no
information used in equals
comparisons on the
objects is modified.
x
,
x.equals(null)
should return false
.
The equals
method for class Object
implements
the most discriminating possible equivalence relation on objects;
that is, for any non-null reference values x
and
y
, this method returns true
if and only
if x
and y
refer to the same object
(x == y
has the value true
).
Note that it is generally necessary to override the hashCode
method whenever this method is overridden, so as to maintain the
general contract for the hashCode
method, which states
that equal objects must have equal hash codes.
equals
in class Object
obj
- the reference object with which to compare.true
if this object is the same as the obj
argument; false
otherwise.Object.hashCode()
,
HashMap
public int hashCode()
java.lang.Object
HashMap
.
The general contract of hashCode
is:
hashCode
method
must consistently return the same integer, provided no information
used in equals
comparisons on the object is modified.
This integer need not remain consistent from one execution of an
application to another execution of the same application.
equals(Object)
method, then calling the hashCode
method on each of
the two objects must produce the same integer result.
Object.equals(java.lang.Object)
method, then calling the hashCode
method on each of the
two objects must produce distinct integer results. However, the
programmer should be aware that producing distinct integer results
for unequal objects may improve the performance of hash tables.
As much as is reasonably practical, the hashCode method defined by
class Object
does return distinct integers for distinct
objects. (This is typically implemented by converting the internal
address of the object into an integer, but this implementation
technique is not required by the
Java™ programming language.)
hashCode
in class Object
Object.equals(java.lang.Object)
,
System.identityHashCode(java.lang.Object)
public String toString()
java.lang.Object
toString
method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString
method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@
', and
the unsigned hexadecimal representation of the hash code of the
object. In other words, this method returns a string equal to the
value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
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