com.ea.agentloader

Class ClassPathUtils

java.lang.Object

com.ea.agentloader.ClassPathUtils

public class ClassPathUtils
extends Object

Class path and class loader utilities to help java agent developers.

Author:

Daniel Sperry

Constructor Summary

Constructors

Constructor and Description
ClassPathUtils()

Method Summary

Modifier and Type	Method and Description
static void	appendToSystemPath(URL path) Appends a directory or jar to the system class loader.
static Class<?>	defineClass(ClassLoader loader, InputStream inputStream)
static URL	getClassFile(Class<?> clazz) Get the actual classpath resource location for a class
static URL	getClassPathFor(Class<?> clazz) Returns the path for the jar or directory that contains a given java class.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassPathUtils

public ClassPathUtils()

Method Detail

getClassPathFor

public static URL getClassPathFor(Class<?> clazz)

Returns the path for the jar or directory that contains a given java class.

Parameters:

clazz - the class whose classpath entry needs to be located.

Returns:

an url with the jar or directory that contains that class

getClassFile

public static URL getClassFile(Class<?> clazz)

Get the actual classpath resource location for a class

Parameters:

clazz - the class whose .class file must be located.

Returns:

a resource url or null if the class is runtime generated.

appendToSystemPath

public static void appendToSystemPath(URL path)

Appends a directory or jar to the system class loader. Do this only if you understand the consequences:

• classes loaded by different class loaders are different classes
• if the application uses the same classes the load order might create inconsistencies

Parameters:

path - the url to append to the system class loader

defineClass

public static Class<?> defineClass(ClassLoader loader,
                                   InputStream inputStream)