org.apache.commons.vfs2.provider.http

Class HttpFileObject

java.lang.Object

org.apache.commons.vfs2.provider.AbstractFileObject

org.apache.commons.vfs2.provider.http.HttpFileObject

All Implemented Interfaces:

FileObject

Direct Known Subclasses:

WebdavFileObject

public class HttpFileObject
extends AbstractFileObject

A file object backed by commons httpclient.

Version:

$Revision: 1040766 $ $Date: 2010-12-01 02:06:53 +0530 (Wed, 01 Dec 2010) $

Author:

Commons VFS team

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	HttpFileObject(AbstractFileName name, HttpFileSystem fileSystem)

Method Summary

Modifier and Type	Method and Description
protected void	doDetach() Detaches this file object from 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 RandomAccessContent	doGetRandomAccessContent(RandomAccessMode mode) Creates access to the file for random i/o.
protected FileType	doGetType() Determines the type of this file.
protected String[]	doListChildren() Lists the children of this file.
protected String	encodePath(String decodedPath)
protected FileContentInfoFactory	getFileContentInfoFactory() create the filecontentinfo implementation.
protected void	setupMethod(org.apache.commons.httpclient.HttpMethod method) Prepares a Method object.

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

canRenameTo, childrenChanged, close, copyFrom, createFile, createFolder, delete, delete, doAttach, doCreateFileContent, doCreateFolder, doDelete, doGetAttributes, doGetCertificates, doGetOutputStream, doIsHidden, doIsReadable, doIsSameFile, doIsWriteable, doListChildrenResolved, doRemoveAttribute, doRename, doSetAttribute, doSetLastModifiedTime, endOutput, exists, finalize, findFiles, findFiles, getChild, getChildren, getContent, 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

Constructor Detail

HttpFileObject

protected HttpFileObject(AbstractFileName name,
                         HttpFileSystem fileSystem)

Method Detail

doDetach

protected void doDetach()
                 throws Exception

Detaches this file object from its file resource.

Overrides:

doDetach in class AbstractFileObject

Throws:

Exception - if an error occurs.

doGetType

protected FileType doGetType()
                      throws Exception

Determines the type of this file. Must not return null. The return value of this method is cached, so the implementation can be expensive.

Specified by:

doGetType in class AbstractFileObject

Returns:

the type of the file.

Throws:

Exception - if an error occurs.

doListChildren

protected String[] doListChildren()
                           throws Exception

Lists the children of this 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.

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.

This implementation throws an exception.

Overrides:

doGetLastModifiedTime in class AbstractFileObject

Returns:

The last modification time.

Throws:

Exception - if an error occurs.

doGetInputStream

protected InputStream doGetInputStream()
                                throws Exception

Creates an input stream to read the file content from. Is only called if doGetType() returns FileType.FILE.

It is guaranteed that there are no open output streams for this file when this method is called.

The returned stream does not have to be buffered.

Specified by:

doGetInputStream in class AbstractFileObject

Returns:

An InputStream to read the file content.

Throws:

Exception - if an error occurs.

doGetRandomAccessContent

protected RandomAccessContent doGetRandomAccessContent(RandomAccessMode mode)
                                                throws Exception

Description copied from class: AbstractFileObject

Creates access to the file for random i/o. Is only called if AbstractFileObject.doGetType() returns FileType.FILE.

It is guaranteed that there are no open output streams for this file when this method is called.

Overrides:

doGetRandomAccessContent in class AbstractFileObject

Parameters:

mode - The mode to access the file.

Returns:

The RandomAccessContext.

Throws:

Exception - if an error occurs.

setupMethod

protected void setupMethod(org.apache.commons.httpclient.HttpMethod method)
                    throws FileSystemException,
                           org.apache.commons.httpclient.URIException

Prepares a Method object.

Throws:

FileSystemException

org.apache.commons.httpclient.URIException

Since:

2.0 (was package)

encodePath

protected String encodePath(String decodedPath)
                     throws org.apache.commons.httpclient.URIException

Throws:

org.apache.commons.httpclient.URIException

getFileContentInfoFactory

protected FileContentInfoFactory getFileContentInfoFactory()

Description copied from class: AbstractFileObject

create the filecontentinfo implementation.

Overrides:

getFileContentInfoFactory in class AbstractFileObject

Returns:

The FileContentInfoFactory.