org.hibernate.validator.util
Class ReflectionHelper

java.lang.Object
  org.hibernate.validator.util.ReflectionHelper

public class ReflectionHelper
extends java.lang.Object

Some reflection utility methods.

Author:

Hardy Ferentschik

Method Summary

static java.lang.Class<?>	boxedType(java.lang.reflect.Type primitiveType) Returns the autoboxed type of a primitive type.
static void	computeClassHierarchy(java.lang.Class<?> clazz, java.util.List<java.lang.Class<?>> classes) Get all superclasses and interfaces recursively.
static java.lang.reflect.Type	getIndexedType(java.lang.reflect.Type type) Determines the type of elements of an Iterable, array or the value of a Map.
static java.lang.Object	getIndexedValue(java.lang.Object value, java.lang.Integer index) Tries to retrieve the indexed value from the specified object.
static java.lang.Object	getMappedValue(java.lang.Object value, java.lang.Object key) Tries to retrieve the mapped value from the specified object.
static java.lang.String	getPropertyName(java.lang.reflect.Member member) Process bean properties getter by applying the JavaBean naming conventions.
static java.lang.Class<?>	getType(java.lang.reflect.Member member) Returns the type of the field of return type of a method.
static java.lang.Object	getValue(java.lang.reflect.Member member, java.lang.Object object)
static boolean	isIterable(java.lang.reflect.Type type)
static boolean	isList(java.lang.reflect.Type type)
static boolean	isMap(java.lang.reflect.Type type)
static java.lang.reflect.Type	typeOf(java.lang.reflect.Member member)

Methods inherited from class java.lang.Object

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

Method Detail

getPropertyName

public static java.lang.String getPropertyName(java.lang.reflect.Member member)

Process bean properties getter by applying the JavaBean naming conventions.

Parameters:

member - the member for which to get the property name.

Returns:

The bean method name with the "is" or "get" prefix stripped off, null the method name id not according to the JavaBeans standard.

getType

public static java.lang.Class<?> getType(java.lang.reflect.Member member)

Returns the type of the field of return type of a method.

Parameters:

member - the member for which to get the type.

Returns:

Returns the type of the field of return type of a method.

typeOf

public static java.lang.reflect.Type typeOf(java.lang.reflect.Member member)

Parameters:

member - The Member instance for which to retrieve the type.

Returns:

Returns the Type of the given Field or Method.

Throws:

java.lang.IllegalArgumentException - in case member is not a Field or Method.

getValue

public static java.lang.Object getValue(java.lang.reflect.Member member,
                                        java.lang.Object object)

getIndexedType

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

Determines the type of elements of an Iterable, array or the value of a Map.

Parameters:

type - the type to inspect

Returns:

Returns the type of elements of an Iterable, array or the value of a Map. null is returned in case the type is not indexable (in the context of JSR 303).

isIterable

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

Parameters:

type - the type to check.

Returns:

Returns true if type is a iterable type, false otherwise.

isMap

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

Parameters:

type - the type to check.

Returns:

Returns true if type is implementing Map, false otherwise.

isList

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

Parameters:

type - the type to check.

Returns:

Returns true if type is implementing List, false otherwise.

getIndexedValue

public static java.lang.Object getIndexedValue(java.lang.Object value,
                                               java.lang.Integer index)

Tries to retrieve the indexed value from the specified object.

Parameters:

value - The object from which to retrieve the indexed value. The object has to be non null and either a collection or array.

index - The index. The index does not have to be numerical. value could also be a map in which case the index could also be a string key.

Returns:

The indexed value or null if value is null or not a collection or array. null is also returned in case the index does not exist.

getMappedValue

public static java.lang.Object getMappedValue(java.lang.Object value,
                                              java.lang.Object key)

Tries to retrieve the mapped value from the specified object.

Parameters:

value - The object from which to retrieve the mapped value. The object has to be non null and must implement the @{code Map} interface.

key - The map key. index.

Returns:

The mapped value or null if value is null or not implementing @{code Map}.

boxedType

public static java.lang.Class<?> boxedType(java.lang.reflect.Type primitiveType)

Returns the autoboxed type of a primitive type.

Parameters:

primitiveType - the primitive type

Returns:

the autoboxed type of a primitive type.

Throws:

java.lang.IllegalArgumentException - in case the parameter primitiveType does not represent a primitive type.

computeClassHierarchy

public static void computeClassHierarchy(java.lang.Class<?> clazz,
                                         java.util.List<java.lang.Class<?>> classes)

Get all superclasses and interfaces recursively.

Parameters:

clazz - The class to start the search with.

classes - List of classes to which to add all found super classes and interfaces.