xdean.jex.util.reflect

类 GenericUtil

java.lang.Object

xdean.jex.util.reflect.GenericUtil

public class GenericUtil
extends Object

构造器概要

构造器

构造器和说明
GenericUtil()

方法概要

限定符和类型	方法和说明
static GenericArrayType	createGenericArrayType(Type componentType)
static ParameterizedType	createParameterizedType(Class<?> rawType, Type ownerType, Type... actualTypeArguments)
static WildcardType	createWildcardType(Type[] upperBounds, Type[] lowerBounds)
static Map<TypeVariable<?>,Type>	getGenericReferenceMap(Class<?> clz)
static Map<TypeVariable<?>,Type>	getGenericReferenceMap(ParameterizedType parameterizedType)
static Map<TypeVariable<?>,Type>	getGenericReferenceMap(Type type)
static Type[]	getGenericTypes(Type sourceType, Class<?> targetClass) Get the actual generic types.

从类继承的方法 java.lang.Object

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

构造器详细资料

GenericUtil

public GenericUtil()

方法详细资料

createParameterizedType

public static ParameterizedType createParameterizedType(Class<?> rawType,
                                                        Type ownerType,
                                                        Type... actualTypeArguments)

createWildcardType

public static WildcardType createWildcardType(Type[] upperBounds,
                                              Type[] lowerBounds)

createGenericArrayType

public static GenericArrayType createGenericArrayType(Type componentType)

getGenericReferenceMap

public static Map<TypeVariable<?>,Type> getGenericReferenceMap(Type type)

getGenericReferenceMap

public static Map<TypeVariable<?>,Type> getGenericReferenceMap(ParameterizedType parameterizedType)

getGenericReferenceMap

public static Map<TypeVariable<?>,Type> getGenericReferenceMap(Class<?> clz)

getGenericTypes

public static Type[] getGenericTypes(Type sourceType,
                                     Class<?> targetClass)

Get the actual generic types.
For example:

 
 class IntList extends ArrayList<Integer>{}
 getGenericType(IntList.class, List.class);// {Integer.class}
 getGenericType(IntList.class, Collection.class);// {Integer.class}
 getGenericType(Integer.class, Comparable.class);// {Integer.class}
 
 

And nested situation

 
 class A<E,T>{}
 class B<E> extends A<E,Integer>{}
 class C extends B<B<Boolean>>{}
 class D<T> extends B<B<? extends T>>{}
 class E extends D<Number>{}
 getGenericType(B.class, A.class);// {E(TypeVariable), Integer.class}
 getGenericType(C.class, A.class);// {B<Boolean>(ParameterizedType), Integer.class}
 getGenericType(E.class, A.class);// {B<? extends Number>(ParameterizedType), Integer.class}
 
 

参数:

sourceType - The type to find generic type. May Class or ParameterizedType

targetClass - Find the actual generic type on this type.

返回:

A type array. Its length equals targetClass's generic parameters' length. Its elements can be Class, TypeVariable, ParameterizedType.