Package com.norconex.commons.lang

Class ClassUtil

java.lang.Object

com.norconex.commons.lang.ClassUtil

public final class ClassUtil
extends Object

Class-related utility methods.

Since:

2.0.0

Method Summary

Modifier and Type	Method	Description
static <A extends Annotation> A	getAnnotation(Class<?> annotatedClass, Class<A> annotationClass)	Gets a type annotation, considering super classes.
static <T> T	newInstance(Class<T> clazz, Object... args)	Create a new instance of this class the with supplied arguments and returns an an unchecked exception in case of failure.

Methods inherited from class java.lang.Object

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

Method Details

getAnnotation

public static <A extends Annotation> A getAnnotation(Class<?> annotatedClass,
 Class<A> annotationClass)

Gets a type annotation, considering super classes. If more than one class in the hierarchy has an annotation of the same type, the first one matching is returned.

Type Parameters:

A - annotation type

Parameters:

annotatedClass - annotated class

annotationClass - the annotation class we are looking for

Returns:

an annotation, or null if none is found

newInstance

public static <T> T newInstance(Class<T> clazz,
 Object... args)

Create a new instance of this class the with supplied arguments and returns an an unchecked exception in case of failure. In case of multiple constructors with the same number of arguments, it will try to find the one matching the argument types.

Parameters:

clazz - the class to instantiate

args - constructor arguments

Returns:

new instance of the class or null if class is null

Throws:

IllegalArgumentException - wrapper exception for checked exceptions thrown when the class cannot be instantiated with the supplied arguments

Since:

3.0.0