org.apache.commons.vfs2.provider.compressed
Class CompressedFileFileObject

java.lang.Object
  org.apache.commons.vfs2.provider.AbstractFileObject
      org.apache.commons.vfs2.provider.compressed.CompressedFileFileObject

All Implemented Interfaces:

FileObject

Direct Known Subclasses:

Bzip2FileObject, GzipFileObject

public abstract class CompressedFileFileObject
extends AbstractFileObject
implements FileObject

A compressed file.
Such a file do only have one child (the compressed filename with stripped last extension)

Author:

Commons VFS team

Constructor Summary

protected

CompressedFileFileObject(AbstractFileName name, FileObject container, CompressedFileFileSystem fs)

Method Summary

void	createFile() Creates this file, if it does not exist.
protected long	doGetContentSize() Returns the size of the file content (in bytes).
protected long	doGetLastModifiedTime() Returns the last modified time of this file.
protected FileType	doGetType() Returns the file's type.
protected String[]	doListChildren() Lists the children of the file.
protected FileObject	getContainer()
boolean	isWriteable() Determines if this file can be written to.

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

canRenameTo, childrenChanged, close, copyFrom, createFolder, delete, delete, doAttach, doCreateFileContent, doCreateFolder, doDelete, doDetach, doGetAttributes, doGetCertificates, doGetInputStream, doGetOutputStream, doGetRandomAccessContent, doIsHidden, doIsReadable, doIsSameFile, doIsWriteable, doListChildrenResolved, doRemoveAttribute, doRename, doSetAttribute, doSetLastModifiedTime, endOutput, exists, finalize, findFiles, findFiles, getChild, getChildren, getContent, getFileContentInfoFactory, getFileOperations, getFileSystem, getInputStream, getName, getOutputStream, getOutputStream, getParent, getRandomAccessContent, getType, getURL, handleChanged, handleCreate, handleDelete, holdObject, injectType, isAttached, isContentOpen, isHidden, isReadable, isSameFile, moveTo, notifyAllStreamsClosed, onChange, onChildrenChanged, refresh, resolveFile, resolveFile, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.vfs2.FileObject

canRenameTo, close, copyFrom, createFolder, delete, delete, exists, findFiles, findFiles, getChild, getChildren, getContent, getFileOperations, getFileSystem, getName, getParent, getType, getURL, isAttached, isContentOpen, isHidden, isReadable, moveTo, refresh, resolveFile, resolveFile

Constructor Detail

CompressedFileFileObject

protected CompressedFileFileObject(AbstractFileName name,
                                   FileObject container,
                                   CompressedFileFileSystem fs)

Method Detail

isWriteable

public boolean isWriteable()
                    throws FileSystemException

Determines if this file can be written to.

Specified by:

isWriteable in interface FileObject

Overrides:

isWriteable in class AbstractFileObject

Returns:

true if this file is writeable, false if not.

Throws:

FileSystemException - if an error occurs.

doGetType

protected FileType doGetType()
                      throws FileSystemException

Returns the file's type.

Specified by:

doGetType in class AbstractFileObject

Returns:

the type of the file.

Throws:

FileSystemException

doListChildren

protected String[] doListChildren()

Lists the children of the file.

Specified by:

doListChildren in class AbstractFileObject

Returns:

a possible empty String array if the file is a directory or null or an exception if the file is not a directory or can't be read.

doGetContentSize

protected long doGetContentSize()

Returns the size of the file content (in bytes). Is only called if doGetType() returns FileType.FILE.

Specified by:

doGetContentSize in class AbstractFileObject

Returns:

The size of the file in bytes.

doGetLastModifiedTime

protected long doGetLastModifiedTime()
                              throws Exception

Returns the last modified time of this file.

Overrides:

doGetLastModifiedTime in class AbstractFileObject

Returns:

The last modification time.

Throws:

Exception - if an error occurs.

getContainer

protected FileObject getContainer()

createFile

public void createFile()
                throws FileSystemException

Description copied from class: AbstractFileObject

Creates this file, if it does not exist.

Specified by:

createFile in interface FileObject

Overrides:

createFile in class AbstractFileObject

Throws:

FileSystemException - if an error occurs.