Package com.attivio.platform.util

Class ReflectionUtils

java.lang.Object

com.attivio.platform.util.ReflectionUtils

public final class ReflectionUtils
extends java.lang.Object

Utility class for performing actions requiring reflection.

Constructor Summary

Constructors

Constructor	Description
ReflectionUtils()

Method Summary

Modifier and Type	Method	Description
static <T> java.lang.Class<? extends T>	forName(java.lang.String className, java.lang.Class<T> type)	Lookup a class given className and type.
static <T extends java.lang.annotation.Annotation> T	getAnnotation(java.lang.Class<?> clazz, java.lang.Class<T> annotation)	Inspects the clazz and returns the Annotation instance if the annotation is present on the clazz.
static java.lang.reflect.Method	getGetter(java.lang.Class<?> beanClass, java.lang.String name)	Gets a getter method.
static java.lang.reflect.Method	getSetter(java.lang.Class<?> beanClass, java.lang.String name, java.lang.Class<?> type)	Gets a setter method.
static java.lang.Object	invoke(java.lang.Class<?> beanClass, java.lang.Object bean, java.lang.String name, java.lang.Object... args)	Invokes a method.
static java.lang.Object	invoke(java.lang.Object bean, java.lang.String name, java.lang.Object... args)	Invokes a method.
static <T extends java.lang.annotation.Annotation> boolean	isAnnotationPresent(java.lang.Class<?> clazz, java.lang.Class<T> annotation)	Inspects the clazz and returns true if the annotation is present on the clazz.
static boolean	isGetter(java.lang.reflect.Method method)	Gets if method is a getter method.
static boolean	isPublic(java.lang.reflect.Method method)	Gets if method is declared public.
static boolean	isSetter(java.lang.reflect.Method method)	Gets if method is a setter method.
static boolean	isSubclass(java.lang.String className, java.lang.Class<?> type)
static <T> T	newInstance(java.lang.Class<? extends T> type)	Intantiate a new instance of type.
static java.lang.Object	newInstance(java.lang.String className)	Instantiate a class by name.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReflectionUtils

public ReflectionUtils()

Method Detail

isPublic

public static boolean isPublic(java.lang.reflect.Method method)

Gets if method is declared public.

isGetter

public static boolean isGetter(java.lang.reflect.Method method)

Gets if method is a getter method.

isSetter

public static boolean isSetter(java.lang.reflect.Method method)

Gets if method is a setter method.

getGetter

public static java.lang.reflect.Method getGetter(java.lang.Class<?> beanClass,
                                                 java.lang.String name)

Gets a getter method.

Parameters:

beanClass - the beanClass

name - the getter name

Returns:

the getter Method (or null if not found)

getSetter

public static java.lang.reflect.Method getSetter(java.lang.Class<?> beanClass,
                                                 java.lang.String name,
                                                 java.lang.Class<?> type)

Gets a setter method.

Parameters:

beanClass - the bean class

name - the setter name

type - the type

Returns:

the setter Method (or null if not found)

forName

public static <T> java.lang.Class<? extends T> forName(java.lang.String className,
                                                       java.lang.Class<T> type)
                                                throws AttivioException

Lookup a class given className and type.

Throws:

AttivioException - if the class is not found or if the type of the class is not a subclass of type

isSubclass

public static boolean isSubclass(java.lang.String className,
                                 java.lang.Class<?> type)
                          throws AttivioException

Parameters:

className -

type -

Returns:

true if className is a subclass or implementation of type (which can be an interface).

Throws:

AttivioException - if className could not be found

newInstance

public static <T> T newInstance(java.lang.Class<? extends T> type)
                         throws AttivioException

Intantiate a new instance of type.

Throws:

AttivioException

newInstance

public static java.lang.Object newInstance(java.lang.String className)
                                    throws AttivioException

Instantiate a class by name.

Throws:

AttivioException

invoke

public static java.lang.Object invoke(java.lang.Object bean,
                                      java.lang.String name,
                                      java.lang.Object... args)
                               throws java.lang.reflect.InvocationTargetException,
                                      java.lang.NoSuchMethodException,
                                      java.lang.IllegalAccessException

Invokes a method.

Parameters:

bean - the bean

name - the method name

args - the arguments

Returns:

result of method invokation

Throws:

java.lang.NoSuchMethodException - if method could not be found

java.lang.reflect.InvocationTargetException

java.lang.IllegalAccessException

invoke

public static java.lang.Object invoke(java.lang.Class<?> beanClass,
                                      java.lang.Object bean,
                                      java.lang.String name,
                                      java.lang.Object... args)
                               throws java.lang.reflect.InvocationTargetException,
                                      java.lang.NoSuchMethodException,
                                      java.lang.IllegalAccessException

Invokes a method.

Parameters:

beanClass - the class for bean

bean - the bean

name - the method name

args - the arguments

Returns:

result of method invokation

Throws:

java.lang.NoSuchMethodException - if method could not be found

java.lang.reflect.InvocationTargetException

java.lang.IllegalAccessException

getAnnotation

public static <T extends java.lang.annotation.Annotation> T getAnnotation(java.lang.Class<?> clazz,
                                                                          java.lang.Class<T> annotation)

Inspects the clazz and returns the Annotation instance if the annotation is present on the clazz. This method works with classes or interfaces. All implemented interfaces are checked.

Parameters:

clazz -

annotation -

Returns:

the annotation if present on clazz, null otherwise.

isAnnotationPresent

public static <T extends java.lang.annotation.Annotation> boolean isAnnotationPresent(java.lang.Class<?> clazz,
                                                                                      java.lang.Class<T> annotation)

Inspects the clazz and returns true if the annotation is present on the clazz. This method works with classes or interfaces. All implemented interfaces are checked.

Parameters:

clazz -

annotation -

Returns:

true if the annotation is present on clazz, false otherwise.