org.apache.commons.vfs2.provider.url
Class UrlFileObject

java.lang.Object
  org.apache.commons.vfs2.provider.AbstractFileObject
      org.apache.commons.vfs2.provider.url.UrlFileObject

All Implemented Interfaces:

FileObject

public class UrlFileObject
extends AbstractFileObject
implements FileObject

A FileObject implementation backed by a URL.

Author:

Commons VFS team

Constructor Summary

protected

UrlFileObject(UrlFileSystem fs, AbstractFileName fileName)

Method Summary

protected URL	createURL(FileName name)
protected void	doAttach() Attaches this file object to its file resource.
protected long	doGetContentSize() Returns the size of the file content (in bytes).
protected InputStream	doGetInputStream() Creates an input stream to read the file content from.
protected long	doGetLastModifiedTime() Returns the last modified time of this file.
protected FileType	doGetType() Determines the type of the file.
protected String[]	doListChildren() Lists the children of the file.

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

canRenameTo, childrenChanged, close, copyFrom, createFile, createFolder, delete, delete, doCreateFileContent, doCreateFolder, doDelete, doDetach, doGetAttributes, doGetCertificates, 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, isWriteable, 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, createFile, createFolder, delete, delete, exists, findFiles, findFiles, getChild, getChildren, getContent, getFileOperations, getFileSystem, getName, getParent, getType, getURL, isAttached, isContentOpen, isHidden, isReadable, isWriteable, moveTo, refresh, resolveFile, resolveFile

Constructor Detail

UrlFileObject

protected UrlFileObject(UrlFileSystem fs,
                        AbstractFileName fileName)

Method Detail

doAttach

protected void doAttach()
                 throws Exception

Attaches this file object to its file resource. This method is called before any of the doBlah() or onBlah() methods. Sub-classes can use this method to perform lazy initialisation.

Overrides:

doAttach in class AbstractFileObject

Throws:

Exception - if an error occurs.

createURL

protected URL createURL(FileName name)
                 throws MalformedURLException,
                        FileSystemException,
                        org.apache.commons.httpclient.URIException

Throws:

MalformedURLException

FileSystemException

org.apache.commons.httpclient.URIException

doGetType

protected FileType doGetType()
                      throws Exception

Determines the type of the file.

Specified by:

doGetType in class AbstractFileObject

Returns:

the type of the file.

Throws:

Exception - if an error occurs.

doGetContentSize

protected long doGetContentSize()
                         throws Exception

Returns the size of the file content (in bytes).

Specified by:

doGetContentSize in class AbstractFileObject

Returns:

The size of the file in bytes.

Throws:

Exception - if an error occurs.

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.

doListChildren

protected String[] doListChildren()
                           throws Exception

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.

Throws:

Exception - if an error occurs.

doGetInputStream

protected InputStream doGetInputStream()
                                throws Exception

Creates an input stream to read the file content from.

Specified by:

doGetInputStream in class AbstractFileObject

Returns:

An InputStream to read the file content.

Throws:

Exception - if an error occurs.