程序包 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

修饰符和类型	类	说明
static class	ReflectHelper.MethodParameter

字段概要

字段

修饰符和类型	字段	说明
static final Function<Class<?>,Boolean>	ALL_OBjECT
static final Function<Class<?>,Boolean>	ALL_OBJECT_EXCEPT_JAVA_SDK
static final Function<Class<?>,Boolean>	NOT_NULL

方法概要

修饰符和类型	方法	说明
static boolean	classExists(String className)
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
static String	getParameterName(Object executable, int index, String prefix)
static String	getParameterName(Constructor<?> executable, int index)
static String	getParameterName(Method method, int index)
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

classExists

public static boolean classExists(String className)

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