Package icu.easyj.core.util

Class ReflectionUtils

java.lang.Object

icu.easyj.core.util.ReflectionUtils

public abstract class ReflectionUtils
extends Object

反射工具类

Author:

wangliang181230

Field Summary

Fields

Modifier and Type	Field	Description
static final Field	NULL_FIELD	The NULL_FIELD
static final Method	NULL_METHOD	The NULL_METHOD

Constructor Summary

Constructors

Constructor	Description
ReflectionUtils()

Method Summary

Modifier and Type	Method	Description
static String	annotationToString(Annotation annotation)	annotatio to string
static String	classToString(Class<?> clazz)	class to string
static boolean	containsMethod(Collection<Method> methods, Method method)	Contains method
static boolean	containsMethod(Map<Method,?> methodMap, Method method)	Contains method
static boolean	equalsMethod(Method m1, Method m2)	Equals method
static String	fieldToString(Class<?> clazz, String fieldName, Class<?> fieldType)	field to string
static String	fieldToString(Field field)	field to string
static Field[]	getAllFields(Class<?> targetClazz)	Gets all fields, excluding static or synthetic fields
static <T extends Annotation> T	getAnnotation(Method method, Class<T> annotationClass)	get annotation from the method or super class method
static <T> T	getAnnotationValue(Annotation annotation, String fieldName)	get annotation value
static Map<String,Object>	getAnnotationValues(Annotation annotation)	get annotation values
static Class<?>	getClassByName(String className)	Gets class by name.
static Class<?>	getClassByName(String className, ClassLoader loader)	Gets class by name.
static Field	getField(Class<?> clazz, String fieldName)	get Field
static <T> T	getFieldValue(Object target, Field field)	get field value
static <T> T	getFieldValue(Object target, String fieldName)	get field value
static Set<Class<?>>	getInterfaces(Class<?> clazz)	get all interface of the clazz
static Method	getMethod(Class<?> clazz, String methodName)	get method
static Method	getMethod(Class<?> clazz, String methodName, Class<?>... parameterTypes)	get method
static <T> T	getSingleton(Class<T> clazz)	get singleton for the class
static boolean	hasField(Class<?> clazz, String fieldName)	has Field
static boolean	hasMethod(Class<?> clazz, Method method)	Has method
static Object	invokeMethod(Object target, Method method)	invoke Method
static Object	invokeMethod(Object target, Method method, Object... args)	invoke Method
static Object	invokeMethod(Object target, String methodName)	invoke Method
static Object	invokeMethod(Object target, String methodName, Class<?>[] parameterTypes, Object... args)	invoke Method
static Object	invokeStaticMethod(Class<?> targetClass, String staticMethodName)	invoke static Method
static Object	invokeStaticMethod(Class<?> targetClass, String staticMethodName, Class<?>[] parameterTypes, Object... args)	invoke static Method
static Object	invokeStaticMethod(Method staticMethod)	invoke static Method
static Object	invokeStaticMethod(Method staticMethod, Object... args)	invoke static Method
static String	methodToString(Class<?> clazz, String methodName, Class<?>... parameterTypes)	method to string
static String	methodToString(Method method)	method to string
static String	parameterTypesToString(Class<?>[] parameterTypes)	parameter types to string
static <T extends AccessibleObject> void	setAccessible(T accessible)	set accessible to true if false
static void	setFieldValue(Object target, Field field, Object fieldValue)	set field value
static void	setFieldValue(Object target, String fieldName, Object fieldValue)	get field value
static void	setStaticFieldValue(Class<?> targetClass, String staticFieldName, Object newValue)	set `static` field value
static void	setStaticFieldValue(Field staticField, Object newValue)	set `static` field value

Methods inherited from class java.lang.Object

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

Field Details

NULL_FIELD

public static final Field NULL_FIELD

The NULL_FIELD

NULL_METHOD

public static final Method NULL_METHOD

The NULL_METHOD

Constructor Details

ReflectionUtils

public ReflectionUtils()

Method Details

getClassByName

@NonNull
public static Class<?> getClassByName(String className,
 ClassLoader loader)
                               throws ClassNotFoundException

Gets class by name.

Parameters:

className - the class name

loader - the class loader

Returns:

the class by name

Throws:

ClassNotFoundException - the class not found exception

getClassByName

@NonNull
public static Class<?> getClassByName(String className)
                               throws ClassNotFoundException

Gets class by name.

Parameters:

className - the class name

Returns:

the class by name

Throws:

ClassNotFoundException - the class not found exception

getInterfaces

@NonNull
public static Set<Class<?>> getInterfaces(Class<?> clazz)

get all interface of the clazz

Parameters:

clazz - the clazz

Returns:

set

setAccessible

public static <T extends AccessibleObject> void setAccessible(T accessible)
                                                       throws SecurityException

set accessible to true if false

Type Parameters:

T - the type of the accessible

Parameters:

accessible - the accessible

Throws:

SecurityException - if the request is denied.

getAllFields

@NonNull
public static Field[] getAllFields(Class<?> targetClazz)

Gets all fields, excluding static or synthetic fields

Parameters:

targetClazz - the target class

Returns:

allFields the all fields

hasField

public static boolean hasField(Class<?> clazz,
 String fieldName)

has Field

Parameters:

clazz - the class

fieldName - the field name

Returns:

the boolean

getField

@NonNull
public static Field getField(Class<?> clazz,
 String fieldName)
                      throws NoSuchFieldException,
SecurityException

get Field

Parameters:

clazz - the class

fieldName - the field name

Returns:

the field

Throws:

IllegalArgumentException - if clazz or fieldName is null

NoSuchFieldException - if the field named fieldName does not exist

SecurityException - the security exception

getFieldValue

@Nullable
public static <T> T getFieldValue(Object target,
 Field field)
                           throws IllegalArgumentException,
SecurityException

get field value

Type Parameters:

T - the field type

Parameters:

target - the target

field - the field of the target

Returns:

field value

Throws:

IllegalArgumentException - if target is null

SecurityException - the security exception

ClassCastException - if the type of the variable receiving the field value is not equals to the field type

getFieldValue

@Nullable
public static <T> T getFieldValue(Object target,
 String fieldName)
                           throws IllegalArgumentException,
NoSuchFieldException,
SecurityException

get field value

Type Parameters:

T - the field type

Parameters:

target - the target

fieldName - the field name

Returns:

field value

Throws:

IllegalArgumentException - if target or fieldName is null

NoSuchFieldException - if the field named fieldName does not exist

SecurityException - the security exception

ClassCastException - if the type of the variable receiving the field value is not equals to the field type

setFieldValue

public static void setFieldValue(Object target,
 Field field,
 Object fieldValue)
                          throws IllegalArgumentException,
SecurityException

set field value

Parameters:

target - the target

field - the field of the target

fieldValue - the field value

Throws:

IllegalArgumentException - if target is null

SecurityException - the security exception

setFieldValue

public static void setFieldValue(Object target,
 String fieldName,
 Object fieldValue)
                          throws IllegalArgumentException,
NoSuchFieldException,
SecurityException

get field value

Parameters:

target - the target

fieldName - the field name

fieldValue - the field value

Throws:

IllegalArgumentException - if target or fieldName is null

NoSuchFieldException - if the field named fieldName does not exist

SecurityException - the security exception

setStaticFieldValue

public static void setStaticFieldValue(Field staticField,
 Object newValue)
                                throws IllegalAccessException

set `static` field value

Parameters:

staticField - the static field

newValue - the new value

Throws:

IllegalArgumentException - if staticField is null or not a static field

IllegalAccessException - the illegal access exception

setStaticFieldValue

public static void setStaticFieldValue(Class<?> targetClass,
 String staticFieldName,
 Object newValue)
                                throws NoSuchFieldException,
IllegalAccessException

set `static` field value

Parameters:

targetClass - the target class

staticFieldName - the static field name

newValue - the new value

Throws:

IllegalArgumentException - if targetClass or staticFieldName is null

NullPointerException - if staticFieldName is null

NoSuchFieldException - if the field named modifyFieldName does not exist

IllegalAccessException - the illegal access exception

getMethod

@NonNull
public static Method getMethod(Class<?> clazz,
 String methodName,
 Class<?>... parameterTypes)
                        throws NoSuchMethodException,
SecurityException

get method

Parameters:

clazz - the class

methodName - the method name

parameterTypes - the parameter types

Returns:

the method

Throws:

IllegalArgumentException - if clazz is null

NullPointerException - if methodName is null

NoSuchMethodException - if the method named methodName does not exist

SecurityException - the security exception

getMethod

@NonNull
public static Method getMethod(Class<?> clazz,
 String methodName)
                        throws NoSuchMethodException,
SecurityException

get method

Parameters:

clazz - the class

methodName - the method name

Returns:

the method

Throws:

IllegalArgumentException - if clazz is null

NullPointerException - if methodName is null

NoSuchMethodException - if the method named methodName does not exist

SecurityException - the security exception

invokeMethod

public static Object invokeMethod(Object target,
 Method method,
 Object... args)
                           throws InvocationTargetException,
IllegalArgumentException,
SecurityException

invoke Method

Parameters:

target - the target

method - the method

args - the args

Returns:

the result of the underlying method

Throws:

InvocationTargetException - if the underlying method throws an exception.

IllegalArgumentException - the illegal argument exception

SecurityException - the security exception

invokeMethod

public static Object invokeMethod(Object target,
 Method method)
                           throws InvocationTargetException,
IllegalArgumentException,
SecurityException

invoke Method

Parameters:

target - the target

method - the method

Returns:

the result of the underlying method

Throws:

InvocationTargetException - if the underlying method throws an exception.

IllegalArgumentException - the illegal argument exception

SecurityException - the security exception

invokeMethod

public static Object invokeMethod(Object target,
 String methodName,
 Class<?>[] parameterTypes,
 Object... args)
                           throws NoSuchMethodException,
InvocationTargetException,
IllegalArgumentException,
SecurityException

invoke Method

Parameters:

target - the target

methodName - the method name

parameterTypes - the parameter types

args - the args

Returns:

the result of the underlying method

Throws:

IllegalArgumentException - if target is null

NullPointerException - if methodName is null

NoSuchMethodException - if the method named methodName does not exist

InvocationTargetException - if the underlying method throws an exception.

SecurityException - the security exception

invokeMethod

public static Object invokeMethod(Object target,
 String methodName)
                           throws NoSuchMethodException,
InvocationTargetException,
IllegalArgumentException,
SecurityException

invoke Method

Parameters:

target - the target

methodName - the method name

Returns:

the result of the underlying method

Throws:

NoSuchMethodException - the no such method exception

InvocationTargetException - if the underlying method throws an exception.

IllegalArgumentException - the illegal argument exception

SecurityException - the security exception

invokeStaticMethod

public static Object invokeStaticMethod(Method staticMethod,
 Object... args)
                                 throws IllegalArgumentException,
InvocationTargetException,
SecurityException

invoke static Method

Parameters:

staticMethod - the static method

args - the args

Returns:

the result of the static method

Throws:

IllegalArgumentException - if staticMethod is null or not a static method

InvocationTargetException - if the underlying method throws an exception.

SecurityException - the security exception

invokeStaticMethod

public static Object invokeStaticMethod(Method staticMethod)
                                 throws InvocationTargetException,
IllegalArgumentException,
SecurityException

invoke static Method

Parameters:

staticMethod - the static method

Returns:

the result of the static method

Throws:

InvocationTargetException - if the underlying method throws an exception.

IllegalArgumentException - the illegal argument exception

SecurityException - the security exception

invokeStaticMethod

public static Object invokeStaticMethod(Class<?> targetClass,
 String staticMethodName,
 Class<?>[] parameterTypes,
 Object... args)
                                 throws IllegalArgumentException,
NoSuchMethodException,
InvocationTargetException,
SecurityException

invoke static Method

Parameters:

targetClass - the target class

staticMethodName - the static method name

parameterTypes - the parameter types

args - the args

Returns:

the result of the static method

Throws:

IllegalArgumentException - if targetClass is null

NullPointerException - if methodName is null

NoSuchMethodException - the no such method exception

InvocationTargetException - if the underlying method throws an exception.

SecurityException - the security exception

invokeStaticMethod

public static Object invokeStaticMethod(Class<?> targetClass,
 String staticMethodName)
                                 throws IllegalArgumentException,
NoSuchMethodException,
SecurityException,
InvocationTargetException

invoke static Method

Parameters:

targetClass - the target class

staticMethodName - the static method name

Returns:

the result of the static method

Throws:

IllegalArgumentException - if targetClass is null

NullPointerException - if methodName is null

NoSuchMethodException - the no such method exception

InvocationTargetException - if the underlying method throws an exception.

SecurityException - the security exception

equalsMethod

public static boolean equalsMethod(Method m1,
 Method m2)

Equals method

Parameters:

m1 - the method 1

m2 - the method 2

Returns:

the boolean

containsMethod

public static boolean containsMethod(Collection<Method> methods,
 Method method)

Contains method

Parameters:

methods - the methods

method - the method

Returns:

the boolean

containsMethod

public static boolean containsMethod(Map<Method,?> methodMap,
 Method method)

Contains method

Parameters:

methodMap - the method map

method - the method

Returns:

the boolean

hasMethod

public static boolean hasMethod(Class<?> clazz,
 Method method)

Has method

Parameters:

clazz - the class

method - the method

Returns:

the boolean

getAnnotation

@Nullable
public static <T extends Annotation> T getAnnotation(Method method,
 Class<T> annotationClass)

get annotation from the method or super class method

Type Parameters:

T - the annotation type

Parameters:

method - the method

annotationClass - the annotation class

Returns:

the annotation

getAnnotationValues

@NonNull
public static Map<String,Object> getAnnotationValues(Annotation annotation)
                                              throws NoSuchFieldException

get annotation values

Parameters:

annotation - the annotation

Returns:

annotationValues the annotation values

Throws:

IllegalArgumentException - if annotation is null

NoSuchFieldException - the no such field exception

getAnnotationValue

@Nullable
public static <T> T getAnnotationValue(Annotation annotation,
 String fieldName)
                                throws NoSuchFieldException

get annotation value

Type Parameters:

T - the type of the field

Parameters:

annotation - the annotation

fieldName - the field name

Returns:

annotationValue the field value

Throws:

IllegalArgumentException - if annotation or fieldName is null

NoSuchFieldException - the no such field exception

getSingleton

@NonNull
public static <T> T getSingleton(Class<T> clazz)

get singleton for the class

Type Parameters:

T - the type

Parameters:

clazz - the clazz

Returns:

the singleton

Throws:

IllegalArgumentException - if clazz is null

classToString

public static String classToString(Class<?> clazz)

class to string

Parameters:

clazz - the class

Returns:

the string

fieldToString

public static String fieldToString(Class<?> clazz,
 String fieldName,
 Class<?> fieldType)

field to string

Parameters:

clazz - the clazz

fieldName - the field name

fieldType - the field type

Returns:

the string

fieldToString

public static String fieldToString(Field field)

field to string

Parameters:

field - the field

Returns:

the string

methodToString

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

method to string

Parameters:

clazz - the clazz

methodName - the method name

parameterTypes - the parameter types

Returns:

the string

methodToString

public static String methodToString(Method method)

method to string

Parameters:

method - the method

Returns:

the string

annotationToString

public static String annotationToString(Annotation annotation)

annotatio to string

Parameters:

annotation - the annotation

Returns:

the string

parameterTypesToString

public static String parameterTypesToString(Class<?>[] parameterTypes)

parameter types to string

Parameters:

parameterTypes - the parameter types

Returns:

the string