Package eu.bandm.tools.util

Class ConfigurableClassLoader.JarArchive

java.lang.Object

eu.bandm.tools.util.ConfigurableClassLoader.ClassSource

eu.bandm.tools.util.ConfigurableClassLoader.JarArchive

Enclosing class:

ConfigurableClassLoader

public class ConfigurableClassLoader.JarArchive
extends ConfigurableClassLoader.ClassSource

A jar archive from which a class can be loaded.

Field Summary

Fields

Modifier and Type	Field	Description
protected final @Opt ClassLoader	localLoader	The loader to which the jar file class loader delegates according to its "Class-Path" manifest entry.
protected final JarFile	root	A jar file (in the local file system) starting from which this class loader will resolve class names.

Constructor Summary

Constructors

Constructor	Description
JarArchive(File root)	Only constructor, sets the jar file from which this class loader will resolve class names.

Method Summary

Modifier and Type	Method	Description
Class<?>	findClass(String name)	Returns the class object, if the class with the given name is found at this position.
protected Class<?>	findClassHere(String name)	Load the class from the jar file only (not delegated to localLoader.
protected @Opt InputStream	openClass(String name)	Return an input stream which contains all data of the class with the given name.
protected String	toPhysicalName(String name)	Convert a class name to the file name valid relative to this class loader.

Methods inherited from class eu.bandm.tools.util.ConfigurableClassLoader.ClassSource

getClassData

Methods inherited from class java.lang.Object

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

Field Details

root

protected final JarFile root

A jar file (in the local file system) starting from which this class loader will resolve class names.

localLoader

@Opt
protected final @Opt ClassLoader localLoader

The loader to which the jar file class loader delegates according to its "Class-Path" manifest entry.

Constructor Details

JarArchive

public JarArchive(File root)
           throws IOException

Only constructor, sets the jar file from which this class loader will resolve class names.

Throws:

IOException

Method Details

findClass

public Class<?> findClass(String name)
                   throws ClassNotFoundException

Returns the class object, if the class with the given name is found at this position. If the class is not found directly in the jar file, the local loader is consulted, which corresponds to the "Class-Path" attribute in the jar file's manifest.

Overrides:

findClass in class ConfigurableClassLoader.ClassSource

Parameters:

name - the binary class name of the class

Returns:

the class as created by ClassLoader.defineClass(byte[], int, int)

Throws:

ClassNotFoundException - iff no class with the given name is found.

findClassHere

protected Class<?> findClassHere(String name)
                          throws ClassNotFoundException

Load the class from the jar file only (not delegated to localLoader.

Throws:

ClassNotFoundException

openClass

@Opt
protected @Opt InputStream openClass(String name)
                              throws IOException

Return an input stream which contains all data of the class with the given name.

Specified by:

openClass in class ConfigurableClassLoader.ClassSource

Parameters:

name - the binary class name to be loaded by this class loader

Throws:

IOException - if no file corresponding to the class name can be found.

toPhysicalName

protected String toPhysicalName(String name)

Convert a class name to the file name valid relative to this class loader.