Package org.apache.dubbo.common.utils

Class ReflectionUtils

java.lang.Object

org.apache.dubbo.common.utils.ReflectionUtils

public class ReflectionUtils
extends Object

A utility class that provides methods for accessing and manipulating private fields and methods of an object. This is useful for white-box testing, where the internal workings of a class need to be tested directly.

Note: Usage of this class should be limited to testing purposes only, as it violates the encapsulation principle.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ReflectionUtils.ReflectionException

Method Summary

Modifier and Type	Method	Description
static List<Class<?>>	getClassGenerics(Class<?> clazz, Class<?> interfaceClass)	Returns a list of distinct Class objects representing the generics of the given class that implement the given interface.
static Object	getField(Object source, String fieldName)	Retrieves the value of the specified field from the given object.
static Object	invoke(Object source, String methodName, Object... params)	Invokes the specified method on the given object with the provided parameters.
static boolean	match(Class<?> clazz, Class<?> interfaceClass, Object event)

Methods inherited from class java.lang.Object

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

Method Details

getField

public static Object getField(Object source,
 String fieldName)

Retrieves the value of the specified field from the given object.

Parameters:

source - The object from which to retrieve the field value.

fieldName - The name of the field to retrieve.

Returns:

The value of the specified field in the given object.

Throws:

RuntimeException - If the specified field does not exist.

invoke

public static Object invoke(Object source,
 String methodName,
 Object... params)

Invokes the specified method on the given object with the provided parameters.

Parameters:

source - The object on which to invoke the method.

methodName - The name of the method to invoke.

params - The parameters to pass to the method.

Returns:

The result of invoking the specified method on the given object.

getClassGenerics

public static List<Class<?>> getClassGenerics(Class<?> clazz,
 Class<?> interfaceClass)

Returns a list of distinct Class objects representing the generics of the given class that implement the given interface.

Parameters:

clazz - the class to retrieve the generics for

interfaceClass - the interface to retrieve the generics for

Returns:

a list of distinct Class objects representing the generics of the given class that implement the given interface

match

public static boolean match(Class<?> clazz,
 Class<?> interfaceClass,
 Object event)