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ClassLoaderUtils (JBoss/JMX API) - JBoss 3.2.7 jmx API Documentation 英文版文档

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org.jboss.mx.loading
Class ClassLoaderUtils

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

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public class ClassLoaderUtils

extends Object

Utility methods for class loader to package names, etc.

Version:

$Revision: 1.2.2.14 $

Author:

Scott.Stark@jboss.org

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Constructor Summary

ClassLoaderUtils()

 

Method Summary
static void	displayClassInfo(Class clazz, StringBuffer results)           Format a string buffer containing the Class, Interfaces, CodeSource, and ClassLoader information for the given object clazz.
static URLClassLoader[]	getClassLoaderStack(ClassLoader cl)           Get all of the URLClassLoaders from cl on up the hierarchy
static URL[]	getClassLoaderURLs(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.
static String	getJarClassName(String className)           Translates a dot class name (java.lang.String) into a path form suitable for a jar entry (java/lang/String.class)
static String	getPackageName(String className)           Parse a class name into its package prefix.
static String	getResourceName(String className)           Parse a class name into its resource form.
static String[]	updateClassNamesMap(UnifiedClassLoader cl, HashMap classNamesMap)           Given a UCL this method determine what classes it contains and create a mapping from the class names to the cl.
static String[]	updateClassNamesMap(UnifiedClassLoader cl, HashMap classNamesMap, URL url, String[] prevClassNames)           Augment the class names associated with a UCL.
static String[]	updatePackageMap(UnifiedClassLoader cl, HashMap packagesMap)           Given a UCL this method determine what packages it contains and create a mapping from the package names to the cl.
static String[]	updatePackageMap(UnifiedClassLoader cl, HashMap packagesMap, URL url, String[] prevPkgNames)           Augment the package name associated with a UCL.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

ClassLoaderUtils

public ClassLoaderUtils()

Method Detail

displayClassInfo

public static void displayClassInfo(Class clazz,
                                    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

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getClassLoaderURLs

public static URL[] getClassLoaderURLs(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.

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getClassLoaderStack

public static URLClassLoader[] getClassLoaderStack(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

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getJarClassName

public static String getJarClassName(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

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getPackageName

public static String getPackageName(String className)

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

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getResourceName

public static String getResourceName(String className)

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

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updatePackageMap

public static String[] updatePackageMap(UnifiedClassLoader cl,
                                        HashMap packagesMap)
                                 throws 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:

Exception

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updatePackageMap

public static String[] updatePackageMap(UnifiedClassLoader cl,
                                        HashMap packagesMap,
                                        URL url,
                                        String[] prevPkgNames)
                                 throws 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:

Exception

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updateClassNamesMap

public static String[] updateClassNamesMap(UnifiedClassLoader cl,
                                           HashMap classNamesMap)
                                    throws 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 HashMap to update

Returns:

the class names directly visible to the cl

Throws:

Exception

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updateClassNamesMap

public static String[] updateClassNamesMap(UnifiedClassLoader cl,
                                           HashMap classNamesMap,
                                           URL url,
                                           String[] prevClassNames)
                                    throws Exception

Augment the class names associated with a UCL.

Parameters:

cl - the UCL that loads from url

classNamesMap - the HashMap 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:

Exception

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