org.jboss.mx.loading
Class ClassLoaderUtils

java.lang.Object
  org.jboss.mx.loading.ClassLoaderUtils

public class ClassLoaderUtils

extends java.lang.Object

Utility methods for class loader to package names, etc.

ClassLoaderUtils

public ClassLoaderUtils()

displayClassInfo

public static void displayClassInfo(java.lang.Class clazz,
                                    java.lang.StringBuffer results)

Format a string buffer containing the Class, Interfaces, CodeSource, and ClassLoader information for the given object clazz.

Parameters:

clazz - the Class

results - - the buffer to write the info to

getClassLoaderURLs

public static java.net.URL[] getClassLoaderURLs(java.lang.ClassLoader cl)

Use reflection to access a URL[] getURLs or URL[] getClasspath method so that non-URLClassLoader class loaders, or class loaders that override getURLs to return null or empty, can provide the true classpath info.

getClassLoaderStack

public static java.net.URLClassLoader[] getClassLoaderStack(java.lang.ClassLoader cl)

Get all of the URLClassLoaders from cl on up the hierarchy

Parameters:

cl - the class loader to start from

Returns:

The possibly empty array of URLClassLoaders from cl through its parent class loaders

getJarClassName

public static java.lang.String getJarClassName(java.lang.String className)

Translates a dot class name (java.lang.String) into a path form suitable for a jar entry (java/lang/String.class)

Parameters:

className - java.lang.String

Returns:

java/lang/String.class

getPackageName

public static java.lang.String getPackageName(java.lang.String className)

Parse a class name into its package prefix. This has to handle array classes whose name is prefixed with [L.

getResourceName

public static java.lang.String getResourceName(java.lang.String className)

Parse a class name into its resource form. This has to handle array classes whose name is prefixed with [L.

newPackageSet

public static java.util.Set newPackageSet()

Create a new package set

Returns:

the new package set

clonePackageSet

public static java.util.Set clonePackageSet(java.lang.Object toClone)

Clone a package set

Returns:

the cloned package set

updatePackageMap

public static java.lang.String[] updatePackageMap(RepositoryClassLoader (src)  cl,
                                                  java.util.Map packagesMap)
                                           throws java.lang.Exception

Given a UCL this method determine what packages it contains and create a mapping from the package names to the cl.

Parameters:

cl - the UCL that loads from url

packagesMap - the Map to update

Returns:

the updated unique set of package names

Throws:

java.lang.Exception

updatePackageMap

public static java.lang.String[] updatePackageMap(RepositoryClassLoader (src)  cl,
                                                  java.util.Map packagesMap,
                                                  java.net.URL url,
                                                  java.lang.String[] prevPkgNames)
                                           throws java.lang.Exception

Augment the package name associated with a UCL.

Parameters:

cl - the UCL that loads from url

packagesMap - the Map to update

url - the URL to parse for package names

prevPkgNames - the set of pckage names already associated with cl

Returns:

the updated unique set of package names

Throws:

java.lang.Exception

updateClassNamesMap

public static java.lang.String[] updateClassNamesMap(RepositoryClassLoader (src)  cl,
                                                     java.util.Map classNamesMap)
                                              throws java.lang.Exception

Given a UCL this method determine what classes it contains and create a mapping from the class names to the cl.

Parameters:

cl - the UCL that loads from url

classNamesMap - the Map to update

Returns:

the class names directly visible to the cl

Throws:

java.lang.Exception

updateClassNamesMap

public static java.lang.String[] updateClassNamesMap(RepositoryClassLoader (src)  cl,
                                                     java.util.Map classNamesMap,
                                                     java.net.URL url,
                                                     java.lang.String[] prevClassNames)
                                              throws java.lang.Exception

Augment the class names associated with a UCL.

Parameters:

cl - the UCL that loads from url

classNamesMap - the Map to update

url - the URL to parse for class names

prevClassNames - the set of pckage names already associated with cl

Returns:

the updated list of class names

Throws:

java.lang.Exception