org.xmlBlaster.util.classloader
Class StandaloneClassLoaderFactory

java.lang.Object
  org.xmlBlaster.util.classloader.StandaloneClassLoaderFactory

All Implemented Interfaces:

ClassLoaderFactory

Direct Known Subclasses:

OsgiClassLoaderFactory

public class StandaloneClassLoaderFactory
extends java.lang.Object
implements ClassLoaderFactory

Field Summary

java.lang.String

ME

Constructor Summary

StandaloneClassLoaderFactory()

StandaloneClassLoaderFactory(Global glob)
We are a singleton in respect to a Global instance.

Method Summary

static java.lang.String	directoryForWrite(java.lang.String path) Recursiv go up the given path until we find a writeable directory
static java.lang.String	getDirectoryForWrite() Navigate up the absolute file system path (where this class came from) until we find a writeable directory.
static LoaderInfo	getLoaderInfo(java.lang.Object caller, java.lang.String plugin, boolean exceptionOnFailure) Retrievs the base path for the object related classpath.
java.net.URLClassLoader	getPluginClassLoader(PluginInfo pluginInfo) Creates and returns a new URL class loader based on the callers class loader and the callers related additional classes which may exist in a specified path.
java.net.URLClassLoader	getXmlBlasterClassLoader() Creates and returns a new URL class loader based on the callers class loader and the callers related additional classes which may exist in a specified path.
void	init(Global glob)
static java.lang.String	which(java.lang.Object caller, java.lang.String className) Prints the absolute pathname of the class file containing the specified class name, as prescribed by the current classpath.

Methods inherited from class java.lang.Object

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

Field Detail

ME

public java.lang.String ME

Constructor Detail

StandaloneClassLoaderFactory

public StandaloneClassLoaderFactory()

StandaloneClassLoaderFactory

public StandaloneClassLoaderFactory(Global glob)

We are a singleton in respect to a Global instance.

Method Detail

init

public void init(Global glob)

Specified by:

init in interface ClassLoaderFactory

getPluginClassLoader

public java.net.URLClassLoader getPluginClassLoader(PluginInfo pluginInfo)
                                             throws XmlBlasterException

Creates and returns a new URL class loader based on the callers class loader and the callers related additional classes which may exist in a specified path.

Specified by:

getPluginClassLoader in interface ClassLoaderFactory

Throws:

XmlBlasterException

getXmlBlasterClassLoader

public java.net.URLClassLoader getXmlBlasterClassLoader()
                                                 throws XmlBlasterException

Creates and returns a new URL class loader based on the callers class loader and the callers related additional classes which may exist in a specified path.

Specified by:

getXmlBlasterClassLoader in interface ClassLoaderFactory

Throws:

XmlBlasterException

getLoaderInfo

public static LoaderInfo getLoaderInfo(java.lang.Object caller,
                                       java.lang.String plugin,
                                       boolean exceptionOnFailure)
                                throws XmlBlasterException

Retrievs the base path for the object related classpath. Taking the base path from the line in the environment classpath which contains the xmlBlaster.jar first! Adding the name of the calling class as path to the basepath.

Parameters:

caller - Type of the calling class

plugin - The plugin name e.g. "org.xmlBlaster.protocol.corba.CorbaDriver" or null

exceptionOnFailure - TODO

Returns:

The base path for the caller specific additional classes, is never null

Throws:

On - failure

XmlBlasterException

which

public static java.lang.String which(java.lang.Object caller,
                                     java.lang.String className)

Prints the absolute pathname of the class file containing the specified class name, as prescribed by the current classpath.

 author Mike Clark
 author Clarkware Consulting
 

Parameters:

caller -

className - Name of the class, e.g. "org.xmlBlaster.protocol.corba.CorbaDriver"

Returns:

Url of resource of className. e.g. "/home/xmlblast/xmlBlaster/classes/org/xmlBlaster/protocol/corba/CorbaDriver.class"

getDirectoryForWrite

public static java.lang.String getDirectoryForWrite()

Navigate up the absolute file system path (where this class came from) until we find a writeable directory.

Returns:

for example "/home/project/lib"

directoryForWrite

public static java.lang.String directoryForWrite(java.lang.String path)

Recursiv go up the given path until we find a writeable directory

Parameters:

path -

Returns:

null if not found