Package org.apache.commons.vfs2.provider.jar

Class JarFileSystem

java.lang.Object

org.apache.commons.vfs2.provider.AbstractVfsComponent

org.apache.commons.vfs2.provider.AbstractFileSystem

org.apache.commons.vfs2.provider.zip.ZipFileSystem

org.apache.commons.vfs2.provider.jar.JarFileSystem

All Implemented Interfaces:

Closeable, AutoCloseable, FileSystem, VfsComponent

public class JarFileSystem
extends ZipFileSystem

A read-only file system for Jar files.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	JarFileSystem(AbstractFileName rootFileName, FileObject parentLayer, FileSystemOptions fileSystemOptions)	Constructs a new instance.

Method Summary

Modifier and Type	Method	Description
protected void	addCapabilities(Collection<Capability> caps)	Returns the capabilities of this file system.
protected ZipFile	createZipFile(File file)	Creates a Zip file.
protected ZipFileObject	createZipFileObject(AbstractFileName name, ZipEntry entry)	Creates a new Zip file object.
Object	getAttribute(String attrName)	Retrieves the attribute with the specified name.
protected ZipFile	getZipFile()	Gets the zip file.

Methods inherited from class org.apache.commons.vfs2.provider.zip.ZipFileSystem

createFile, doCloseCommunicationLink, getCharset, getFileFromCache, init, putFileToCache, removeFileFromCache, toString

Methods inherited from class org.apache.commons.vfs2.provider.AbstractFileSystem

addJunction, addListener, close, closeCommunicationLink, decorateFileObject, doReplicateFile, fireFileChanged, fireFileCreated, fireFileDeleted, getFileSystemManager, getFileSystemOptions, getLastModTimeAccuracy, getParentLayer, getRoot, getRootName, getRootURI, hasCapability, isOpen, isReleaseable, notifyAllStreamsClosed, removeJunction, removeListener, replicateFile, resolveFile, resolveFile, setAttribute

Methods inherited from class org.apache.commons.vfs2.provider.AbstractVfsComponent

getContext, getLogger, setContext, setLogger

Methods inherited from class java.lang.Object

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

Constructor Details

JarFileSystem

protected JarFileSystem(AbstractFileName rootFileName,
 FileObject parentLayer,
 FileSystemOptions fileSystemOptions)
                 throws FileSystemException

Constructs a new instance.

Parameters:

rootFileName - The root file name of this file system.

parentLayer - The parent layer of this file system.

fileSystemOptions - Options to build this file system.

Throws:

FileSystemException - If the parent layer does not exist, or on error replicating the file.

Method Details

addCapabilities

protected void addCapabilities(Collection<Capability> caps)

Returns the capabilities of this file system.

Overrides:

addCapabilities in class ZipFileSystem

Parameters:

caps - collections of Capabilities, can be immutable.

createZipFile

protected ZipFile createZipFile(File file)
                         throws FileSystemException

Description copied from class: ZipFileSystem

Creates a Zip file.

Overrides:

createZipFile in class ZipFileSystem

Parameters:

file - the underlying file.

Returns:

a Zip file.

Throws:

FileSystemException - if a file system error occurs.

createZipFileObject

protected ZipFileObject createZipFileObject(AbstractFileName name,
 ZipEntry entry)
                                     throws FileSystemException

Description copied from class: ZipFileSystem

Creates a new Zip file object.

Overrides:

createZipFileObject in class ZipFileSystem

Parameters:

name - the underlying file.

entry - the Zip entry.

Returns:

a new ZipFileObject.

Throws:

FileSystemException - if a file system error occurs.

getAttribute

public Object getAttribute(String attrName)
                    throws FileSystemException

Retrieves the attribute with the specified name. The default implementation simply throws an exception.

Specified by:

getAttribute in interface FileSystem

Overrides:

getAttribute in class AbstractFileSystem

Parameters:

attrName - The attribute's name.

Returns:

The value of the attribute.

Throws:

FileSystemException - if an error occurs.

See Also:

• FileContent.getAttribute(java.lang.String)

getZipFile

protected ZipFile getZipFile()
                      throws FileSystemException

Description copied from class: ZipFileSystem

Gets the zip file.

Overrides:

getZipFile in class ZipFileSystem

Returns:

the zip file.

Throws:

FileSystemException - if a file system error occurs.