Package me.datafox.dfxengine.utils

Class ClassUtils

java.lang.Object

me.datafox.dfxengine.utils.ClassUtils

public class ClassUtils
extends Object

Utilities for classes and reflection.

Constructor Summary

Constructors

Constructor	Description
ClassUtils()

Method Summary

Modifier and Type	Method	Description
static <T, C> Function<T,Stream<C>>	filterInstanceAndCast(Class<C> aClass)
static <T, C> Stream<C>	filterInstanceAndCast(T input, Class<C> aClass)
static <T extends Annotation> Optional<T>	getAnnotationFromArray(Annotation[] arr, Class<T> annotationType)
static <T> List<Constructor<T>>	getConstructorsWithAnnotation(Class<T> aClass, Class<? extends Annotation> annotation)
static <T> List<Field>	getFieldsWithAnnotation(Class<T> aClass, Class<? extends Annotation> annotation)
static <T> List<Method>	getMethodsWithAnnotation(Class<T> aClass, Class<? extends Annotation> annotation)
static <T> Stream<Class<? super T>>	getSuperclassesFor(Class<? super T> aClass)

Methods inherited from class java.lang.Object

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

Constructor Details

ClassUtils

public ClassUtils()

Method Details

getSuperclassesFor

public static <T> Stream<Class<? super T>> getSuperclassesFor(Class<? super T> aClass)

Type Parameters:

T - type of the class

Parameters:

aClass - class

Returns:

Stream of the class and all superclasses and superinterfaces of the class

getConstructorsWithAnnotation

public static <T> List<Constructor<T>> getConstructorsWithAnnotation(Class<T> aClass,
 Class<? extends Annotation> annotation)

Type Parameters:

T - type of the class

Parameters:

aClass - class

annotation - annotation

Returns:

List of all declared constructors of the class with the annotation

getFieldsWithAnnotation

public static <T> List<Field> getFieldsWithAnnotation(Class<T> aClass,
 Class<? extends Annotation> annotation)

Type Parameters:

T - type of the class

Parameters:

aClass - class

annotation - annotation

Returns:

List of all declared fields of the class with the annotation

getMethodsWithAnnotation

public static <T> List<Method> getMethodsWithAnnotation(Class<T> aClass,
 Class<? extends Annotation> annotation)

Type Parameters:

T - type of the class

Parameters:

aClass - class

annotation - annotation

Returns:

List of all declared methods of the class with the annotation

getAnnotationFromArray

public static <T extends Annotation> Optional<T> getAnnotationFromArray(Annotation[] arr,
 Class<T> annotationType)

Type Parameters:

T - type of the annotation

Parameters:

arr - array of annotations

annotationType - annotation type

Returns:

Optional containing the first annotation in the array matching the type, or empty if no matches are found

filterInstanceAndCast

public static <T,
C> Stream<C> filterInstanceAndCast(T input,
 Class<C> aClass)

Type Parameters:

T - type of the input

C - type to be cast to

Parameters:

input - object to be checked

aClass - Class

Returns:

Stream of the object cast to the specified Class, or an empty Stream if the object cannot be cast to the specified Class

filterInstanceAndCast

public static <T,
C> Function<T,Stream<C>> filterInstanceAndCast(Class<C> aClass)

Type Parameters:

T - type of the input

C - type to be cast to

Parameters:

aClass - Class

Returns:

Function that returns a Stream of the object cast to the specified Class, or an empty Stream if the object cannot be cast to the specified Class