org.jupiter.common.util

类 Reflects

java.lang.Object

org.jupiter.common.util.Reflects

public final class Reflects
extends Object

Static utility methods pertaining to reflection. jupiter org.jupiter.common.util

作者:

jiachun.fjc

方法概要

方法

限定符和类型	方法和说明
static Object	fastInvoke(Object obj, String methodName, Class<?>[] parameterTypes, Object[] args) Invokes the underlying method, fast invoke using ASM.
static Class<?>[]	findMatchingParameterTypes(List<Class<?>[]> parameterTypesList, Object[] args) Find an array of parameter Types that matches the given compatible parameters.
static <Ext> Pair<Class<?>[],Ext>	findMatchingParameterTypesExt(List<Pair<Class<?>[],Ext>> pairs, Object[] args) Find an array of parameter Types that matches the given compatible parameters.
static Field	getField(Class<?> clazz, String name) Returns a Field object that reflects the specified declared field of the Class or interface represented by this Class object.
static Object	getStaticValue(Class<?> clazz, String name) Returns the static value by name, on the specified Class.
static Object	getTypeDefaultValue(Class<?> clazz) Returns the default value for the specified class.
static Object	getValue(Object o, String name) Returns the value by name, on the specified object.
static boolean	isAssignable(Class<?>[] classArray, Class<?>[] toClassArray, boolean autoboxing) Checks if an array of Classes can be assigned to another array of Classes.
static boolean	isAssignable(Class<?> cls, Class<?> toClass, boolean autoboxing) Checks if one Class can be assigned to a variable of another Class.
static <T> T	newInstance(Class<T> clazz) Creates a new object.
static <T> T	newInstance(Class<T> clazz, boolean constructorCalled) Creates a new object.
static Class<?>	primitiveToWrapper(Class<?> cls) Converts the specified primitive Class object to its corresponding wrapper Class object.
static void	setStaticValue(Class<?> clazz, String name, Object value) Sets new value by name, on the specified Class.
static void	setValue(Object o, String name, Object value) Sets new value by name, on the specified object.
static String	simpleClassName(Class<?> clazz) Generates a simplified name from a Class.
static String	simpleClassName(Object o) The shortcut to simpleClassName(o.getClass()).
static Class<?>	wrapperToPrimitive(Class<?> cls) Converts the specified wrapper Class to its corresponding primitive class.

从类继承的方法 java.lang.Object

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

方法详细资料

newInstance

public static <T> T newInstance(Class<T> clazz)

Creates a new object.

参数:

clazz - the class to instantiate

返回:

new instance of clazz

newInstance

public static <T> T newInstance(Class<T> clazz,
                boolean constructorCalled)

Creates a new object.

参数:

clazz - the class to instantiate

constructorCalled - whether or not any constructor being called

返回:

new instance of clazz

fastInvoke

public static Object fastInvoke(Object obj,
                String methodName,
                Class<?>[] parameterTypes,
                Object[] args)

Invokes the underlying method, fast invoke using ASM.

参数:

obj - the object the underlying method is invoked from

methodName - the method name this object

parameterTypes - the parameter types for the method this object

args - the arguments used for the method call

返回:

the result of dispatching the method represented by this object on obj with parameters

getField

public static Field getField(Class<?> clazz,
             String name)
                      throws NoSuchFieldException

Returns a Field object that reflects the specified declared field of the Class or interface represented by this Class object. The name parameter is a String that specifies the simple name of the desired field.

参数:

clazz - class

name - field name

返回:

the Field object for the specified field in this class

抛出:

NoSuchFieldException - if a field with the specified name is not found.

getStaticValue

public static Object getStaticValue(Class<?> clazz,
                    String name)

Returns the static value by name, on the specified Class. The value is automatically wrapped in an object if it has a primitive type.

参数:

clazz - the specified class

name - the name of the represented field in class

返回:

the value of the represented field in class

setStaticValue

public static void setStaticValue(Class<?> clazz,
                  String name,
                  Object value)

Sets new value by name, on the specified Class. The new value is automatically unwrapped if the underlying field has a primitive type.

参数:

clazz - the specified class

name - the name of the the field in class

value - the new value for the field in class

getValue

public static Object getValue(Object o,
              String name)

Returns the value by name, on the specified object. The value is automatically wrapped in an object if it has a primitive type.

参数:

o - the specified object

name - the name of the represented field in object

返回:

the value of the represented field in object

setValue

public static void setValue(Object o,
            String name,
            Object value)

Sets new value by name, on the specified object. The new value is automatically unwrapped if the underlying field has a primitive type.

参数:

o - the specified object

name - the name of the the field in object

value - the new value for the field in object

getTypeDefaultValue

public static Object getTypeDefaultValue(Class<?> clazz)

Returns the default value for the specified class.

simpleClassName

public static String simpleClassName(Object o)

The shortcut to simpleClassName(o.getClass()).

simpleClassName

public static String simpleClassName(Class<?> clazz)

Generates a simplified name from a Class. Similar to Class.getSimpleName(), but it works fine with anonymous classes.

findMatchingParameterTypes

public static Class<?>[] findMatchingParameterTypes(List<Class<?>[]> parameterTypesList,
                                    Object[] args)

Find an array of parameter Types that matches the given compatible parameters.

findMatchingParameterTypesExt

public static <Ext> Pair<Class<?>[],Ext> findMatchingParameterTypesExt(List<Pair<Class<?>[],Ext>> pairs,
                                                       Object[] args)

Find an array of parameter Types that matches the given compatible parameters.

isAssignable

public static boolean isAssignable(Class<?>[] classArray,
                   Class<?>[] toClassArray,
                   boolean autoboxing)

Checks if an array of Classes can be assigned to another array of Classes.

isAssignable

public static boolean isAssignable(Class<?> cls,
                   Class<?> toClass,
                   boolean autoboxing)

Checks if one Class can be assigned to a variable of another Class.

primitiveToWrapper

public static Class<?> primitiveToWrapper(Class<?> cls)

Converts the specified primitive Class object to its corresponding wrapper Class object.

wrapperToPrimitive

public static Class<?> wrapperToPrimitive(Class<?> cls)

Converts the specified wrapper Class to its corresponding primitive class.