Package io.activej.types

Class Types

java.lang.Object

io.activej.types.Types

public class Types
extends Object

Various helper methods for type processing

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	Types.GenericArrayTypeImpl
static final class	Types.ParameterizedTypeImpl
static class	Types.WildcardTypeImpl

Field Summary

Fields

Modifier and Type	Field	Description
static final Type[]	NO_TYPES
static final WildcardType	WILDCARD_TYPE_ANY

Constructor Summary

Constructors

Constructor	Description
Types()

Method Summary

Modifier and Type	Method	Description
static Type	bind(Type type, Function<TypeVariable<?>,@Nullable Type> bindings)	Binds a given type with actual type arguments
static Type	bind(Type type, Map<TypeVariable<?>,Type> bindings)	Binds a given type with actual type arguments
static GenericArrayType	genericArrayType(Type componentType)	Creates an instance of GenericArrayType with a given component type
static Type[]	getActualTypeArguments(Type type)	Returns an array of actual type arguments for a given Type
static Map<TypeVariable<?>,Type>	getAllTypeBindings(Type type)	Returns a map of all type bindings for a given Type.
static Class<?>	getRawType(Type type)	Returns a raw Class for a given Type.
static String	getSimpleName(Type type)	Returns a simple name for a given Type
static Map<TypeVariable<?>,Type>	getTypeBindings(Type type)	Returns a map of type bindings for a given Type
static Type	getUppermostType(Type[] types)	Returns the most common type among given types
static ParameterizedType	parameterizedType(@Nullable Type ownerType, Type rawType, Type[] parameters)	Creates an instance of ParameterizedType
static ParameterizedType	parameterizedType(Class<?> rawType, Type... parameters)	Creates an instance of ParameterizedType
static WildcardType	wildcardType(Type[] upperBounds, Type[] lowerBounds)	Creates an instance of WildcardType bound by upper and lower bounds
static WildcardType	wildcardTypeAny()	Returns an instance of WildcardType that matches any type
static WildcardType	wildcardTypeExtends(Type upperBound)	Creates an instance of WildcardType bound by a single upper bound
static WildcardType	wildcardTypeSuper(Type lowerBound)	Creates an instance of WildcardType bound by a single lower bound

Methods inherited from class java.lang.Object

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

Field Details

NO_TYPES

public static final Type[] NO_TYPES

WILDCARD_TYPE_ANY

public static final WildcardType WILDCARD_TYPE_ANY

Constructor Details

Types

public Types()

Method Details

getRawType

public static Class<?> getRawType(Type type)

Returns a raw Class for a given Type.

A type can be any of Class, ParameterizedType, WildcardType, GenericArrayType or TypeVariable

getUppermostType

public static Type getUppermostType(Type[] types)

Returns the most common type among given types

getActualTypeArguments

public static Type[] getActualTypeArguments(Type type)

Returns an array of actual type arguments for a given Type

Parameters:

type - type whose actual type arguments should be retrieved

Returns:

an array of actual type arguments for a given Type

getTypeBindings

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

Returns a map of type bindings for a given Type

getAllTypeBindings

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

Returns a map of all type bindings for a given Type. Includes type bindings from a whole class hierarchy

bind

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

Binds a given type with actual type arguments

Parameters:

type - a type to be bound

bindings - a map of actual types

bind

public static Type bind(Type type,
 Function<TypeVariable<?>,@Nullable Type> bindings)

Binds a given type with actual type arguments

Parameters:

type - a type to be bound

bindings - a lookup function for actual types

parameterizedType

public static ParameterizedType parameterizedType(@Nullable
 @Nullable Type ownerType,
 Type rawType,
 Type[] parameters)

Creates an instance of ParameterizedType

Parameters:

ownerType - an owner type

rawType - a type to be parameterized

parameters - parameter types

Returns:

an instance of ParameterizedType

parameterizedType

public static ParameterizedType parameterizedType(Class<?> rawType,
 Type... parameters)

Creates an instance of ParameterizedType

See Also:

• parameterizedType(Type, Type, Type[])

wildcardType

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

Creates an instance of WildcardType bound by upper and lower bounds

Parameters:

upperBounds - a wildcard upper bound types

lowerBounds - a wildcard lower bound types

Returns:

an instance of WildcardType

wildcardTypeAny

public static WildcardType wildcardTypeAny()

Returns an instance of WildcardType that matches any type

E.g. <?>

See Also:

• wildcardType(Type[], Type[])

wildcardTypeExtends

public static WildcardType wildcardTypeExtends(Type upperBound)

Creates an instance of WildcardType bound by a single upper bound

E.g. <? extends UpperBound>

Parameters:

upperBound - a wildcard upper bound type

Returns:

an instance of WildcardType

See Also:

• wildcardType(Type[], Type[])

wildcardTypeSuper

public static WildcardType wildcardTypeSuper(Type lowerBound)

Creates an instance of WildcardType bound by a single lower bound

E.g. <? super LowerBound>

Parameters:

lowerBound - a wildcard lower bound type

Returns:

an instance of WildcardType

See Also:

• wildcardType(Type[], Type[])

genericArrayType

public static GenericArrayType genericArrayType(Type componentType)

Creates an instance of GenericArrayType with a given component type

Same as T[]

Parameters:

componentType - a component type of generic array

Returns:

an instance of GenericArrayType

See Also:

• wildcardType(Type[], Type[])

getSimpleName

public static String getSimpleName(Type type)

Returns a simple name for a given Type

See Also:

• Class.getSimpleName()