ml.shifu.guagua.util

Class ReflectionUtils

java.lang.Object

ml.shifu.guagua.util.ReflectionUtils

public final class ReflectionUtils
extends Object

ReflectionUtils is used to get instance from java reflection mechanism.

The class should have default constructor for getting instance.

Constructors are cached but instances are not cached. Each time you will get a new instance.

Method Summary

Modifier and Type	Method and Description
static Method	getMethod(Class<?> clazz, String methodName) Just to check if has method with methodName.
static boolean	hasEmptyParameterConstructor(Class<?> clazz) Check if there is empty-parameter constructor in one clazz.
static <T> T	newInstance(Class<T> clazz) Create an object for the given class.
static <T> T	newInstance(String name) Create an object for the given class.

Methods inherited from class java.lang.Object

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

Method Detail

newInstance

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

Create an object for the given class. The class should have constructor without any parameters.

Parameters:

clazz - class of which an object is created

Returns:

a new object

Throws:

GuaguaRuntimeException - In case any exception for reflection.

newInstance

public static <T> T newInstance(String name)

Create an object for the given class. The class should have constructor without any parameters.

Parameters:

name - qualified class name.

Returns:

a new object

Throws:

GuaguaRuntimeException - In case any exception for reflection.

hasEmptyParameterConstructor

public static boolean hasEmptyParameterConstructor(Class<?> clazz)

Check if there is empty-parameter constructor in one clazz.

getMethod

public static Method getMethod(Class<?> clazz,
                               String methodName)

Just to check if has method with methodName. This function only supports functions without parameters.