org.panda_lang.utilities.commons

Class ReflectionUtils

java.lang.Object

org.panda_lang.utilities.commons.ReflectionUtils

public final class ReflectionUtils
extends Object

Method Summary

Modifier and Type	Method and Description
static <E extends Executable> Collection<E>	getByModifier(E[] executables, int modifier) Get executables with the specified modifier
static <R,T> Collection<R>	getFieldValues(Class<T> clazz, Class<R> type, T instance) Collect values of static fields with the specified type
static Optional<Method>	getMethod(Class<?> clazz, String methodName, Class<?>... parameterTypes) Get method wrapped into optional instead of exception if method does not exist.
static List<Method>	getMethods(Class<?> clazz, String methodName) Collect all methods with the same name
static Set<Method>	getMethodsAnnotatedWith(Class<?> clazz, Class<? extends Annotation> annotation) Collect methods annotated with the specified annotation
static <T> Collection<T>	getStaticFieldValues(Class<?> clazz, Class<T> type) Collect values of static fields with the specified type

Methods inherited from class java.lang.Object

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

Method Detail

getByModifier

public static <E extends Executable> Collection<E> getByModifier(E[] executables,
                                                                 int modifier)

Get executables with the specified modifier

Type Parameters:

E - type of executable

Parameters:

executables - array of executables to search in

modifier - the modifier to search for

Returns:

collection of matched executables

getMethod

public static Optional<Method> getMethod(Class<?> clazz,
                                         String methodName,
                                         Class<?>... parameterTypes)

Get method wrapped into optional instead of exception if method does not exist. Comparing to Class.getMethod(String, Class[]) it also checks non-public methods.

Parameters:

clazz - the class to search in

methodName - name of method

parameterTypes - parameter types of method

Returns:

the result method wrapped into optional

getMethods

public static List<Method> getMethods(Class<?> clazz,
                                      String methodName)

Collect all methods with the same name

Parameters:

clazz - class to search

methodName - name to search for

Returns:

the list of the matching methods

getMethodsAnnotatedWith

public static Set<Method> getMethodsAnnotatedWith(Class<?> clazz,
                                                  Class<? extends Annotation> annotation)

Collect methods annotated with the specified annotation

Parameters:

clazz - class to search

annotation - annotation to search for

Returns:

the set of annotated methods

getStaticFieldValues

public static <T> Collection<T> getStaticFieldValues(Class<?> clazz,
                                                     Class<T> type)

Collect values of static fields with the specified type

Type Parameters:

T - value type

Parameters:

clazz - class to search in

type - type of field

Returns:

collection of collected values

getFieldValues

public static <R,T> Collection<R> getFieldValues(Class<T> clazz,
                                                 Class<R> type,
                                                 @Nullable
                                                 T instance)

Collect values of static fields with the specified type

Type Parameters:

R - type of values

T - type of instance

Parameters:

clazz - class to search in

type - type of fields

instance - instance

Returns:

collection of collected values