org.hibernate.validator.internal.util

Class TypeHelper

java.lang.Object

org.hibernate.validator.internal.util.TypeHelper

public final class TypeHelper
extends java.lang.Object

Provides utility methods for working with types.

Author:

Mark Hobson, Hardy Ferentschik

Method Summary

Modifier and Type	Method and Description
static java.lang.reflect.Type	extractConstraintType(java.lang.Class<? extends javax.validation.ConstraintValidator<?,?>> validator)
static java.lang.reflect.Type	extractConstraintValidatorTypeArgumentType(java.lang.Class<? extends javax.validation.ConstraintValidator<?,?>> validator, int typeArgumentIndex)
static java.lang.reflect.Type	extractValidatedType(java.lang.Class<? extends javax.validation.ConstraintValidator<?,?>> validator)
static java.lang.reflect.GenericArrayType	genericArrayType(java.lang.reflect.Type componentType) Creates a generic array type for the specified component type.
static java.lang.reflect.Type	getComponentType(java.lang.reflect.Type type)
static java.lang.Class<?>	getErasedReferenceType(java.lang.reflect.Type type)
static java.lang.reflect.Type	getErasedType(java.lang.reflect.Type type) Gets the erased type of the specified type.
static <A extends java.lang.annotation.Annotation> java.util.Map<java.lang.reflect.Type,ConstraintValidatorDescriptor<A>>	getValidatorTypes(java.lang.Class<A> annotationType, java.util.List<ConstraintValidatorDescriptor<A>> validators)
static boolean	isArray(java.lang.reflect.Type type)
static boolean	isAssignable(java.lang.reflect.Type supertype, java.lang.reflect.Type type)
static boolean	isInstance(java.lang.reflect.Type type, java.lang.Object object)
static boolean	isUnboundWildcard(java.lang.reflect.Type type)
static java.lang.reflect.ParameterizedType	parameterizedType(java.lang.Class<?> rawType, java.lang.reflect.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(java.lang.reflect.Type supertype,
                                   java.lang.reflect.Type type)

getErasedType

public static java.lang.reflect.Type getErasedType(java.lang.reflect.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

getErasedReferenceType

public static java.lang.Class<?> getErasedReferenceType(java.lang.reflect.Type type)

isArray

public static boolean isArray(java.lang.reflect.Type type)

getComponentType

public static java.lang.reflect.Type getComponentType(java.lang.reflect.Type type)

genericArrayType

public static java.lang.reflect.GenericArrayType genericArrayType(java.lang.reflect.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(java.lang.reflect.Type type,
                                 java.lang.Object object)

parameterizedType

public static java.lang.reflect.ParameterizedType parameterizedType(java.lang.Class<?> rawType,
                                                                    java.lang.reflect.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:

java.lang.reflect.MalformedParameterizedTypeException - if the number of actual type arguments differs from those defined on the raw type

getValidatorTypes

public static <A extends java.lang.annotation.Annotation> java.util.Map<java.lang.reflect.Type,ConstraintValidatorDescriptor<A>> getValidatorTypes(java.lang.Class<A> annotationType,
                                                                                                                                                   java.util.List<ConstraintValidatorDescriptor<A>> validators)

Type Parameters:

A - the type of the annotation

Parameters:

annotationType - The annotation type.

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.

extractValidatedType

public static java.lang.reflect.Type extractValidatedType(java.lang.Class<? extends javax.validation.ConstraintValidator<?,?>> validator)

extractConstraintType

public static java.lang.reflect.Type extractConstraintType(java.lang.Class<? extends javax.validation.ConstraintValidator<?,?>> validator)

extractConstraintValidatorTypeArgumentType

public static java.lang.reflect.Type extractConstraintValidatorTypeArgumentType(java.lang.Class<? extends javax.validation.ConstraintValidator<?,?>> validator,
                                                                                int typeArgumentIndex)

isUnboundWildcard

public static boolean isUnboundWildcard(java.lang.reflect.Type type)