ReflectionHelper (Hibernate Validator 4.3.2.Final)

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

```
public final class ReflectionHelper
extends Object
```
Some reflection utility methods. Where necessary calls will be performed as PrivilegedAction which is necessary for situations where a security manager is in place.

Author:

Hardy Ferentschik, Gunnar Morling, Kevin Pollet (C) 2011 SERLI

Field Summary

Fields
Modifier and Type Field and Description

static String[] PROPERTY_ACCESSOR_PREFIXES

Fields
Modifier and Type	Field and Description
`static String[]`	`PROPERTY_ACCESSOR_PREFIXES`

Method Summary

Methods
Modifier and Type	Method and Description
`static Class<?>`	`boxedType(Class<?> primitiveType)` Returns the auto-boxed type of a primitive type.
`static Set<Class<?>>`	`computeAllImplementedInterfaces(Class<?> clazz)` Get all interfaces a class directly implements.
`static List<Class<?>>`	`computeClassHierarchy(Class<?> clazz, boolean includeInterfaces)` Get all superclasses and optionally interfaces recursively.
`static Type`	`getIndexedType(Type type)` Determines the type of elements of an `Iterable`, array or the value of a `Map`.
`static Object`	`getIndexedValue(Object value, Integer index)` Tries to retrieve the indexed value from the specified object.
`static Object`	`getMappedValue(Object value, Object key)` Tries to retrieve the mapped value from the specified object.
`static String`	`getPropertyName(Member member)` Returns the JavaBeans property name of the given member.
`static Object`	`getValue(Member member, Object object)`
`static boolean`	`haveSameSignature(Method method1, Method method2)` Checks, whether the given methods have the same signature, which is the case if they have the same name, parameter count and types.
`static boolean`	`isGetterMethod(Method method)` Checks whether the given method is a valid JavaBeans getter method, meaning its name starts with "is" or "has" and it has no parameters.
`static boolean`	`isIterable(Type type)`
`static boolean`	`isList(Type type)`
`static boolean`	`isMap(Type type)`
`static Type`	`typeOf(Member member)`
`static Type`	`typeOf(Method method, int parameterIndex)` Returns the type of the parameter of the given method with the given parameter index.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - PROPERTY_ACCESSOR_PREFIXES
```
public static final String[] PROPERTY_ACCESSOR_PREFIXES
```
- Method Detail
  - getPropertyName
```
public static String getPropertyName(Member member)
```
    Returns the JavaBeans property name of the given member.
    For fields, the field name will be returned. For getter methods, the decapitalized property name will be returned, with the "get", "is" or "has" prefix stripped off. Getter methods are methods
    - whose name start with "get" and who have a return type but no parameter or
    - whose name starts with "is" and who have no parameter and return boolean or
    - whose name starts with "has" and who have no parameter and return boolean (HV-specific, not mandated by JavaBeans spec).
    Parameters:
    member - The member for which to get the property name.
    
    Returns:
    The property name for the given member or null if the member is neither a field nor a getter method according to the JavaBeans standard.
  - isGetterMethod
```
public static boolean isGetterMethod(Method method)
```
    Checks whether the given method is a valid JavaBeans getter method, meaning its name starts with "is" or "has" and it has no parameters.
    
    Parameters:
    method - The method of interest.
    
    Returns:
    true, if the given method is a JavaBeans getter method, false otherwise.
  - typeOf
```
public static Type typeOf(Member member)
```
    Parameters:
    member - The Member instance for which to retrieve the type.
    
    Returns:
    Returns the Type of the given Field or Method.
    
    Throws:
    
    IllegalArgumentException - in case member is not a Field or Method.
  - typeOf
```
public static Type typeOf(Method method,
          int parameterIndex)
```
    Returns the type of the parameter of the given method with the given parameter index.
    
    Parameters:
    method - The method of interest.
    parameterIndex - The index of the parameter for which the type should be returned.
    
    Returns:
    The erased type.
  - getValue
```
public static Object getValue(Member member,
              Object object)
```
  - getIndexedType
```
public static Type getIndexedType(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(Type type)
```
    Parameters:
    type - the type to check.
    
    Returns:
    Returns true if type is a iterable type, false otherwise.
  - isMap
```
public static boolean isMap(Type type)
```
    Parameters:
    type - the type to check.
    
    Returns:
    Returns true if type is implementing Map, false otherwise.
  - isList
```
public static boolean isList(Type type)
```
    Parameters:
    type - the type to check.
    
    Returns:
    Returns true if type is implementing List, false otherwise.
  - getIndexedValue
```
public static Object getIndexedValue(Object value,
                     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 Object getMappedValue(Object value, 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}. haveSameSignature public static boolean haveSameSignature(Method method1, Method method2) Checks, whether the given methods have the same signature, which is the case if they have the same name, parameter count and types. Parameters: method1 - A first method. method2 - A second method. Returns: True, if the methods have the same signature, false otherwise. boxedType public static Class<?> boxedType(Class<?> primitiveType) Returns the auto-boxed type of a primitive type. Parameters: primitiveType - the primitive type Returns: the auto-boxed type of a primitive type. In case Void is passed (which is considered as primitive type by Class.isPrimitive()), Void will be returned. Throws: IllegalArgumentException - in case the parameter primitiveType does not represent a primitive type. computeClassHierarchy public static List<Class<?>> computeClassHierarchy(Class<?> clazz, boolean includeInterfaces) Get all superclasses and optionally interfaces recursively. Parameters: clazz - The class to start the search with. includeInterfaces - whether or not to include interfaces Returns: List of all super classes and interfaces of clazz. The list contains the class itself! The empty list is returned if clazz is null. computeAllImplementedInterfaces public static Set<Class<?>> computeAllImplementedInterfaces(Class<?> clazz) Get all interfaces a class directly implements. Parameters: clazz - The class for which to find the interfaces Returns: Set of all interfaces clazz implements. The empty list is returned if clazz does not implement any interfaces or clazz is null

Class ReflectionHelper

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

PROPERTY_ACCESSOR_PREFIXES

Method Detail

getPropertyName

isGetterMethod

typeOf

typeOf

getValue

getIndexedType

isIterable

isMap

isList

getIndexedValue

getMappedValue

haveSameSignature

boxedType

computeClassHierarchy

computeAllImplementedInterfaces