com.google.common.reflect

Class Reflection

java.lang.Object

com.google.common.reflect.Reflection

@Beta
public final class Reflection
extends Object

Static utilities relating to Java reflection.

Since:

12.0

Method Summary

Modifier and Type	Method and Description
static String	getPackageName(Class<?> clazz) Returns the package name of clazz according to the Java Language Specification (section 6.7).
static String	getPackageName(String classFullName) Returns the package name of classFullName according to the Java Language Specification (section 6.7).
static void	initialize(Class<?>... classes) Ensures that the given classes are initialized, as described in JLS Section 12.4.2.
static <T> T	newProxy(Class<T> interfaceType, InvocationHandler handler) Returns a proxy instance that implements interfaceType by dispatching method invocations to handler.

Methods inherited from class java.lang.Object

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

Method Detail

getPackageName

public static String getPackageName(Class<?> clazz)

Returns the package name of clazz according to the Java Language Specification (section 6.7). Unlike Class.getPackage(), this method only parses the class name, without attempting to define the Package and hence load files.

getPackageName

public static String getPackageName(String classFullName)

Returns the package name of classFullName according to the Java Language Specification (section 6.7). Unlike Class.getPackage(), this method only parses the class name, without attempting to define the Package and hence load files.

initialize

public static void initialize(Class<?>... classes)

Ensures that the given classes are initialized, as described in JLS Section 12.4.2.

WARNING: Normally it's a smell if a class needs to be explicitly initialized, because static state hurts system maintainability and testability. In cases when you have no choice while inter-operating with a legacy framework, this method helps to keep the code less ugly.

Throws:

ExceptionInInitializerError - if an exception is thrown during initialization of a class

newProxy

public static <T> T newProxy(Class<T> interfaceType,
                             InvocationHandler handler)

Returns a proxy instance that implements interfaceType by dispatching method invocations to handler. The class loader of interfaceType will be used to define the proxy class. To implement multiple interfaces or specify a class loader, use Proxy.newProxyInstance(java.lang.ClassLoader, java.lang.Class<?>[], java.lang.reflect.InvocationHandler).

Throws:

IllegalArgumentException - if interfaceType does not specify the type of a Java interface