org.hibernate.validator.internal.util
Class TypeHelper

java.lang.Object
  org.hibernate.validator.internal.util.TypeHelper

public final class TypeHelper
extends Object

Provides utility methods for working with types.

Author:

Mark Hobson, Hardy Ferentschik

Method Summary

static GenericArrayType	genericArrayType(Type componentType) Creates a generic array type for the specified component type.
static Type	getArrayType(Type componentType)
static Type	getComponentType(Type type)
static Type	getErasedType(Type type) Gets the erased type of the specified type.
static Type[]	getResolvedInterfaces(Type type)
static <A extends Annotation> Map<Type,Class<? extends ConstraintValidator<A,?>>>	getValidatorsTypes(Class<A> annotationType, List<Class<? extends ConstraintValidator<A,?>>> validators)
static boolean	isArray(Type type)
static boolean	isAssignable(Type supertype, Type type)
static boolean	isInstance(Type type, Object object)
static ParameterizedType	parameterizedType(Class<?> rawType, Type... actualTypeArguments) Creates a parameterized type for the specified raw type and actual type arguments.

Methods inherited from class java.lang.Object

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

Method Detail

isAssignable

public static boolean isAssignable(Type supertype,
                                   Type type)

getErasedType

public static Type getErasedType(Type type)

Gets the erased type of the specified type.

Parameters:

type - the type to perform erasure on

Returns:

the erased type, never a parameterized type nor a type variable

See Also:

4.6 Type Erasure

isArray

public static boolean isArray(Type type)

getComponentType

public static Type getComponentType(Type type)

getArrayType

public static Type getArrayType(Type componentType)

genericArrayType

public static GenericArrayType genericArrayType(Type componentType)

Creates a generic array type for the specified component type.

Parameters:

componentType - the component type

Returns:

the generic array type

isInstance

public static boolean isInstance(Type type,
                                 Object object)

parameterizedType

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

Creates a parameterized type for the specified raw type and actual type arguments.

Parameters:

rawType - the raw type

actualTypeArguments - the actual type arguments

Returns:

the parameterized type

Throws:

MalformedParameterizedTypeException - if the number of actual type arguments differs from those defined on the raw type

getResolvedInterfaces

public static Type[] getResolvedInterfaces(Type type)

getValidatorsTypes

public static <A extends Annotation> Map<Type,Class<? extends ConstraintValidator<A,?>>> getValidatorsTypes(Class<A> annotationType,
                                                                                                            List<Class<? extends ConstraintValidator<A,?>>> validators)

Parameters:

validators - List of constraint validator classes (for a given constraint).

Returns:

Return a Map<Class, Class<? extends ConstraintValidator>> where the map key is the type the validator accepts and value the validator class itself.