com.github.netty.core.util

类 ReflectUtil

java.lang.Object

com.github.netty.core.util.ReflectUtil

public class ReflectUtil
extends Object

ReflectUtil Provide utility functions for calling getter/setter methods, accessing private variables, calling private methods, getting generic type classes, real classes that have been aoped, and so on.

作者:

wangzihao

构造器概要

构造器

构造器和说明
ReflectUtil()

方法概要

限定符和类型	方法和说明
static <A extends Annotation> A	findAnnotation(Class claz, Class<A> ann)
static Class<? extends Annotation>	findAnnotationClassByAnnotationType(Class clazz, Collection<Class<? extends Annotation>> annotations)
static Class	findClassByAnnotation(Class claz, Class<? extends Annotation> ann)
static Class<?>	forName(String name, ClassLoader classLoader)
static Field	getAccessibleField(Object obj, String fieldName) Loop up to get the DeclaredField of the object and force it to be accessible.
static Method	getAccessibleMethod(Class clazz, String methodName, Class<?>... parameterTypes) Loop up to get the DeclaredMethod for the object and force it to be accessible.
static Map<String,Object>	getAnnotationValueMap(Annotation annotation)
static String	getClassFileName(Class<?> clazz) Determine the name of the class file, relative to the containing package: e.g.
static ClassLoader	getDefaultClassLoader()
static Object	getFieldValue(Object obj, String fieldName) Read the object property values directly, ignoring the private/protected modifier, without going through the getter function.
static Class[]	getInterfaces(Class sourceClass)
static boolean	hasInterface(Class sourceClass)
static boolean	hasParameterAnnotation(Class sourceClass, Collection<Class<? extends Annotation>> parameterAnnotations)
static Class<?>	resolveClassName(String className, ClassLoader classLoader)

从类继承的方法 java.lang.Object

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

构造器详细资料

ReflectUtil

public ReflectUtil()

方法详细资料

resolveClassName

public static Class<?> resolveClassName(String className,
                                        ClassLoader classLoader)
                                 throws IllegalArgumentException

抛出:

IllegalArgumentException

forName

public static Class<?> forName(String name,
                               ClassLoader classLoader)
                        throws ClassNotFoundException,
                               LinkageError

抛出:

ClassNotFoundException

LinkageError

getDefaultClassLoader

public static ClassLoader getDefaultClassLoader()

getInterfaces

public static Class[] getInterfaces(Class sourceClass)

hasInterface

public static boolean hasInterface(Class sourceClass)

hasParameterAnnotation

public static boolean hasParameterAnnotation(Class sourceClass,
                                             Collection<Class<? extends Annotation>> parameterAnnotations)

findClassByAnnotation

public static Class findClassByAnnotation(Class claz,
                                          Class<? extends Annotation> ann)

findAnnotation

public static <A extends Annotation> A findAnnotation(Class claz,
                                                      Class<A> ann)

findAnnotationClassByAnnotationType

public static Class<? extends Annotation> findAnnotationClassByAnnotationType(Class clazz,
                                                                              Collection<Class<? extends Annotation>> annotations)

getAnnotationValueMap

public static Map<String,Object> getAnnotationValueMap(Annotation annotation)

getFieldValue

public static Object getFieldValue(Object obj,
                                   String fieldName)

Read the object property values directly, ignoring the private/protected modifier, without going through the getter function.

参数:

obj - obj

fieldName - fieldName

返回:

ObjectValue

getAccessibleField

public static Field getAccessibleField(Object obj,
                                       String fieldName)

Loop up to get the DeclaredField of the object and force it to be accessible. if the Object cannot be found even if the Object is transformed upward, null will be returned.

参数:

obj - obj

fieldName - fieldName

返回:

Field

getAccessibleMethod

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

Loop up to get the DeclaredMethod for the object and force it to be accessible. if the Object cannot be found even if the Object is transformed upward, null will be returned. matches function name + parameter type. Method. Invoke (Object obj, Object... The args)

参数:

clazz - class

methodName - methodName

parameterTypes - parameterTypes

返回:

Method

getClassFileName

public static String getClassFileName(Class<?> clazz)

Determine the name of the class file, relative to the containing package: e.g. "String.class"

参数:

clazz - the class

返回:

the file name of the ".class" file