org.coodex.util

类 ReflectHelper

java.lang.Object

org.coodex.util.ReflectHelper

public class ReflectHelper
extends Object

作者:

Davidoff

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ReflectHelper.MethodParameter

字段概要

字段

限定符和类型	字段和说明
static Function<Class<?>,Boolean>	ALL_OBjECT
static Function<Class<?>,Boolean>	ALL_OBJECT_EXCEPT_JAVA_SDK
static Function<Class<?>,Boolean>	NOT_NULL

方法概要

限定符和类型	方法和说明
static <S,T extends S> S	extendInterface(T o, Object... objects)
static void	foreachClass(Consumer<Class<?>> processor, Function<String,Boolean> filter, String... packages)
static Field[]	getAllDeclaredFields(Class<?> clz)
static Field[]	getAllDeclaredFields(Class<?> clz, Function<Class<?>,Boolean> decision)
static Class<?>[]	getAllInterfaces(Class<?> clz)
static <T extends Annotation> T	getAnnotation(Class<T> annotationClass, AnnotatedElement... elements)
static <T extends Annotation> T	getAnnotation(Class<T> annotationClass, AnnotatedElement element, Set<AnnotatedElement> checked)
static Method	getLambdaMethod(Object lambda) 获取lambda表达式实例的方法签名，方法来源：https://zhuanlan.zhihu.com/p/151438084 原理，在lambda实例的class(isSynthetic)中找到对应的方法，因为lambda表达式是单一方法的实例，所以能够找到的应该是有且仅有的一个方法
static String	getParameterName(Constructor<?> executable, int index)
static String	getParameterName(Method method, int index)
static String	getParameterName(Object executable, int index, String prefix)
static Object	invoke(Object obj, Method method, Object[] args)
static boolean	isAssignable(Class<?> from, Class<?> to)
static boolean	isMatch(Type instanceType, Type serviceType)
static <T> T	throwExceptionObject(Class<T> interfaceClass, Function<Method,Throwable> function)
static <T> T	throwExceptionObject(Class<T> interfaceClass, Supplier<Throwable> supplier)
static String	typeToCodeStr(Type type)

从类继承的方法 java.lang.Object

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

字段详细资料

NOT_NULL

public static final Function<Class<?>,Boolean> NOT_NULL

ALL_OBjECT

public static final Function<Class<?>,Boolean> ALL_OBjECT

ALL_OBJECT_EXCEPT_JAVA_SDK

public static final Function<Class<?>,Boolean> ALL_OBJECT_EXCEPT_JAVA_SDK

方法详细资料

getAnnotation

public static <T extends Annotation> T getAnnotation(Class<T> annotationClass,
                                                     AnnotatedElement element,
                                                     Set<AnnotatedElement> checked)

getAnnotation

public static <T extends Annotation> T getAnnotation(Class<T> annotationClass,
                                                     AnnotatedElement... elements)

getParameterName

public static String getParameterName(Object executable,
                                      int index,
                                      String prefix)

getLambdaMethod

public static Method getLambdaMethod(Object lambda)
                              throws ReflectiveOperationException

获取lambda表达式实例的方法签名，方法来源：https://zhuanlan.zhihu.com/p/151438084

原理，在lambda实例的class(isSynthetic)中找到对应的方法，因为lambda表达式是单一方法的实例，所以能够找到的应该是有且仅有的一个方法

参数:

lambda - lambda instance

返回:

lambda表达式实例的方法签名

抛出:

ReflectiveOperationException - exception

getParameterName

public static String getParameterName(Method method,
                                      int index)

getParameterName

public static String getParameterName(Constructor<?> executable,
                                      int index)

getAllDeclaredFields

public static Field[] getAllDeclaredFields(Class<?> clz)

getAllDeclaredFields

public static Field[] getAllDeclaredFields(Class<?> clz,
                                           Function<Class<?>,Boolean> decision)

invoke

public static Object invoke(Object obj,
                            Method method,
                            Object[] args)
                     throws IllegalAccessException,
                            IllegalArgumentException,
                            InvocationTargetException,
                            NoSuchMethodException,
                            SecurityException

抛出:

IllegalAccessException

IllegalArgumentException

InvocationTargetException

NoSuchMethodException

SecurityException

foreachClass

public static void foreachClass(Consumer<Class<?>> processor,
                                Function<String,Boolean> filter,
                                String... packages)

throwExceptionObject

public static <T> T throwExceptionObject(Class<T> interfaceClass,
                                         Supplier<Throwable> supplier)

throwExceptionObject

public static <T> T throwExceptionObject(Class<T> interfaceClass,
                                         Function<Method,Throwable> function)

typeToCodeStr

public static String typeToCodeStr(Type type)

getAllInterfaces

public static Class<?>[] getAllInterfaces(Class<?> clz)

isAssignable

public static boolean isAssignable(Class<?> from,
                                   Class<?> to)

isMatch

public static boolean isMatch(Type instanceType,
                              Type serviceType)

extendInterface

public static <S,T extends S> S extendInterface(T o,
                                                Object... objects)

类型参数:

S - 必须是接口

T - extends S

参数:

o - object

objects - 需要扩展出来的对象，只扩展接口

返回:

扩展后的对象