ReflectionUtils (Apache DeltaSpike Sources 1.8.0 API)

java.lang.Object
- org.apache.deltaspike.core.util.ReflectionUtils

```
@Typed
public abstract class ReflectionUtils
extends Object
```
Utilities for common reflection based actions. Some are basic Java Reflection based, others are CDI based.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static int`	`calculateHashCodeOfAnnotation(Annotation annotation, boolean skipNonbindingMembers)`
`static int`	`calculateHashCodeOfType(Type type)` We need this method as some weird JVMs return 0 as hashCode for classes.
`static Type[]`	`getActualTypeArguments(Class<?> clazz)` Gets the actual type arguments of a class
`static Type[]`	`getActualTypeArguments(Type type)` Gets the actual type arguments of a Type
`static Set<Field>`	`getAllDeclaredFields(Class<?> clazz)` Get all the declared fields on the class hierarchy.
`static Set<Method>`	`getAllDeclaredMethods(Class<?> clazz)` Get all the declared methods on the class hierarchy.
`static <T> Class<T>`	`getRawType(Type type)` Extract the raw type, given a type.
`static <T> T`	`invokeMethod(Object instance, Method method, Class<T> expectedReturnType, boolean setAccessible, Object... args)` Invoke the method on the instance, with any arguments specified, casting the result of invoking the method to the expected return type.
`static boolean`	`isAbstract(Method method)` Checks if a method is abstract
`static boolean`	`isArrayType(Class<?> rawType)` Checks if raw type is array type
`static boolean`	`isFinal(Class<?> clazz)` Checks if class is final
`static boolean`	`isFinal(Member member)` Checks if member is final
`static boolean`	`isPackagePrivate(int mod)`
`static boolean`	`isParameterizedType(Class<?> type)` Checks if type is parameterized type
`static boolean`	`isParameterizedTypeWithWildcard(Class<?> type)`
`static boolean`	`isPrimitive(Type type)`
`static boolean`	`isPrivate(Member member)` Checks if member is private
`static boolean`	`isSerializable(Class<?> clazz)` Check if a class is serializable.
`static boolean`	`isStatic(Class<?> type)` Checks if type is static
`static boolean`	`isStatic(Member member)` Checks if member is static
`static boolean`	`isTransient(Member member)`
`static Field`	`tryToFindDeclaredField(Class<?> clazz, String name)` Search the class hierarchy for a field with the given name.

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

- Method Detail
  - getAllDeclaredFields
```
public static Set<Field> getAllDeclaredFields(Class<?> clazz)
```
    Get all the declared fields on the class hierarchy. This will return overridden fields.
    
    Parameters:
    
    clazz - The class to search
    
    Returns:
    
    the set of all declared fields or an empty set if there are none
  - tryToFindDeclaredField
```
public static Field tryToFindDeclaredField(Class<?> clazz,
                                           String name)
```
    Search the class hierarchy for a field with the given name. Will return the nearest match, starting with the class specified and searching up the hierarchy.
    
    Parameters:
    
    clazz - The class to search
    
    name - The name of the field to search for
    
    Returns:
    
    The field found, or null if no field is found
  - getAllDeclaredMethods
```
public static Set<Method> getAllDeclaredMethods(Class<?> clazz)
```
    Get all the declared methods on the class hierarchy. This will return overridden methods.
    
    Parameters:
    
    clazz - The class to search
    
    Returns:
    
    the set of all declared methods or an empty set if there are none
  - invokeMethod
```
public static <T> T invokeMethod(Object instance,
                                 Method method,
                                 Class<T> expectedReturnType,
                                 boolean setAccessible,
                                 Object... args)
```
    Invoke the method on the instance, with any arguments specified, casting the result of invoking the method to the expected return type.
    
    This method wraps Method.invoke(Object, Object...), converting the checked exceptions that Method.invoke(Object, Object...) specifies to runtime exceptions.
    
    If instructed, this method attempts to set the accessible flag of the method in a PrivilegedAction before invoking the method.
    
    Parameters:
    
    setAccessible - flag indicating whether method should first be set as accessible
    
    method - the method to invoke
    
    instance - the instance to invoke the method
    
    args - the arguments to the method
    
    Returns:
    
    the result of invoking the method, or null if the method's return type is void
    
    Throws:
    
    RuntimeException - if this Method object enforces Java language access control and the underlying method is inaccessible or if the underlying method throws an exception or if the initialization provoked by this method fails.
    
    IllegalArgumentException - if the method is an instance method and the specified instance argument is not an instance of the class or interface declaring the underlying method (or of a subclass or implementor thereof); if the number of actual and formal parameters differ; if an unwrapping conversion for primitive arguments fails; or if, after possible unwrapping, a parameter value cannot be converted to the corresponding formal parameter type by a method invocation conversion.
    
    NullPointerException - if the specified instance is null and the method is an instance method.
    
    ClassCastException - if the result of invoking the method cannot be cast to the expectedReturnType
    
    ExceptionInInitializerError - if the initialization provoked by this method fails.
    
    See Also:
    
    Method.invoke(Object, Object...)
  - getRawType
```
public static <T> Class<T> getRawType(Type type)
```
    Extract the raw type, given a type.
    
    Type Parameters:
    
    T - the type
    
    Parameters:
    
    type - the type to extract the raw type from
    
    Returns:
    
    the raw type, or null if the raw type cannot be determined.
  - isSerializable
```
public static boolean isSerializable(Class<?> clazz)
```
    Check if a class is serializable.
    
    Parameters:
    
    clazz - The class to check
    
    Returns:
    
    true if the class implements serializable or is a primitive (needed for type Void
  - isFinal
```
public static boolean isFinal(Class<?> clazz)
```
    Checks if class is final
    
    Parameters:
    
    clazz - The class to check
    
    Returns:
    
    True if final, false otherwise
  - isFinal
```
public static boolean isFinal(Member member)
```
    Checks if member is final
    
    Parameters:
    
    member - The member to check
    
    Returns:
    
    True if final, false otherwise
  - isPrivate
```
public static boolean isPrivate(Member member)
```
    Checks if member is private
    
    Parameters:
    
    member - The member to check
    
    Returns:
    
    True if final, false otherwise
  - isPackagePrivate
```
public static boolean isPackagePrivate(int mod)
```
  - isStatic
```
public static boolean isStatic(Class<?> type)
```
    Checks if type is static
    
    Parameters:
    
    type - Type to check
    
    Returns:
    
    True if static, false otherwise
  - isStatic
```
public static boolean isStatic(Member member)
```
    Checks if member is static
    
    Parameters:
    
    member - Member to check
    
    Returns:
    
    True if static, false otherwise
  - isTransient
```
public static boolean isTransient(Member member)
```
  - isAbstract
```
public static boolean isAbstract(Method method)
```
    Checks if a method is abstract
  - getActualTypeArguments
```
public static Type[] getActualTypeArguments(Class<?> clazz)
```
    Gets the actual type arguments of a class
    
    Parameters:
    
    clazz - The class to examine
    
    Returns:
    
    The type arguments
  - getActualTypeArguments
```
public static Type[] getActualTypeArguments(Type type)
```
    Gets the actual type arguments of a Type
    
    Parameters:
    
    type - The type to examine
    
    Returns:
    
    The type arguments
  - isArrayType
```
public static boolean isArrayType(Class<?> rawType)
```
    Checks if raw type is array type
    
    Parameters:
    
    rawType - The raw type to check
    
    Returns:
    
    True if array, false otherwise
  - isParameterizedType
```
public static boolean isParameterizedType(Class<?> type)
```
    Checks if type is parameterized type
    
    Parameters:
    
    type - The type to check
    
    Returns:
    
    True if parameterized, false otherwise
  - isParameterizedTypeWithWildcard
```
public static boolean isParameterizedTypeWithWildcard(Class<?> type)
```
  - isPrimitive
```
public static boolean isPrimitive(Type type)
```
  - calculateHashCodeOfAnnotation
```
public static int calculateHashCodeOfAnnotation(Annotation annotation,
                                                boolean skipNonbindingMembers)
```
  - calculateHashCodeOfType
```
public static int calculateHashCodeOfType(Type type)
```
    We need this method as some weird JVMs return 0 as hashCode for classes. In that case we return the hashCode of the String.

Class ReflectionUtils

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getAllDeclaredFields

tryToFindDeclaredField

getAllDeclaredMethods

invokeMethod

getRawType

isSerializable

isFinal

isFinal

isPrivate

isPackagePrivate

isStatic

isStatic

isTransient

isAbstract

getActualTypeArguments

getActualTypeArguments

isArrayType

isParameterizedType

isParameterizedTypeWithWildcard

isPrimitive

calculateHashCodeOfAnnotation

calculateHashCodeOfType