org.apache.jackrabbit.core.fs.mem
Class MemoryFileSystem

java.lang.Object
  org.apache.jackrabbit.core.fs.mem.MemoryFileSystem

All Implemented Interfaces:

FileSystem

public class MemoryFileSystem
extends Object
implements FileSystem

An in-memory file system implementation.

Field Summary

Fields inherited from interface org.apache.jackrabbit.core.fs.FileSystem

SEPARATOR, SEPARATOR_CHAR

Constructor Summary

MemoryFileSystem()

Method Summary

void	close() Close the file system.
void	createFolder(String folderPath) Creates the folder named by this path, including any necessary but nonexistent parent folders.
void	deleteFile(String filePath) Deletes the file denoted by this path.
void	deleteFolder(String folderPath) Deletes the folder denoted by this path.
boolean	exists(String path) Tests whether the file system entry denoted by this path exists.
InputStream	getInputStream(String filePath) Returns an input stream of the contents of the file denoted by this path.
OutputStream	getOutputStream(String filePath) Returns an output stream for writing bytes to the file denoted by this path.
boolean	hasChildren(String path) Tests whether the file system entry denoted by this path has child entries.
void	init() Initialize the file system
boolean	isFile(String path) Tests whether the file system entry denoted by this path exists and is a file.
boolean	isFolder(String path) Tests whether the file system entry denoted by this path exists and is a folder.
long	lastModified(String path) Returns the time that the file system entry denoted by this path was last modified.
long	length(String filePath) Returns the length of the file denoted by this path.
String[]	list(String folderPath) Returns an array of strings naming the files and folders in the folder denoted by this path.
String[]	listFiles(String folderPath) Returns an array of strings naming the files in the folder denoted by this path.
String[]	listFolders(String folderPath) Returns an array of strings naming the folders in the folder denoted by this path.

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryFileSystem

public MemoryFileSystem()

Method Detail

close

public void close()

Description copied from interface: FileSystem

Close the file system. After calling this method, the file system is no longer accessible.

Specified by:

close in interface FileSystem

createFolder

public void createFolder(String folderPath)
                  throws FileSystemException

Description copied from interface: FileSystem

Creates the folder named by this path, including any necessary but nonexistent parent folders. Note that if this operation fails it may have succeeded in creating some of the necessary parent folders.

Specified by:

createFolder in interface FileSystem

Parameters:

folderPath - the path of the folder to be created.

Throws:

FileSystemException - if a file system entry denoted by path already exists or if another error occurs.

deleteFile

public void deleteFile(String filePath)
                throws FileSystemException

Description copied from interface: FileSystem

Deletes the file denoted by this path.

Specified by:

deleteFile in interface FileSystem

Parameters:

filePath - the path of the file to be deleted.

Throws:

FileSystemException - if this path does not denote a file or if another error occurs.

deleteFolder

public void deleteFolder(String folderPath)
                  throws FileSystemException

Description copied from interface: FileSystem

Deletes the folder denoted by this path. Any contents of this folder (folders and files) will be deleted recursively.

Specified by:

deleteFolder in interface FileSystem

Parameters:

folderPath - the path of the folder to be deleted.

Throws:

FileSystemException - if this path does not denote a folder or if another error occurs.

exists

public boolean exists(String path)
               throws FileSystemException

Description copied from interface: FileSystem

Tests whether the file system entry denoted by this path exists.

Specified by:

exists in interface FileSystem

Parameters:

path - the path of a file system entry.

Returns:

true if the file system entry at path exists; false otherwise.

Throws:

FileSystemException

getInputStream

public InputStream getInputStream(String filePath)
                           throws FileSystemException

Description copied from interface: FileSystem

Returns an input stream of the contents of the file denoted by this path.

Specified by:

getInputStream in interface FileSystem

Parameters:

filePath - the path of the file.

Returns:

an input stream of the contents of the file.

Throws:

FileSystemException - if the file does not exist or if it cannot be read from

getOutputStream

public OutputStream getOutputStream(String filePath)
                             throws FileSystemException

Description copied from interface: FileSystem

Returns an output stream for writing bytes to the file denoted by this path. The file will be created if it doesn't exist. If the file exists, its contents will be overwritten.

Specified by:

getOutputStream in interface FileSystem

Parameters:

filePath - the path of the file.

Returns:

an output stream for writing bytes to the file.

Throws:

FileSystemException - if the file cannot be written to or created

hasChildren

public boolean hasChildren(String path)
                    throws FileSystemException

Description copied from interface: FileSystem

Tests whether the file system entry denoted by this path has child entries.

Specified by:

hasChildren in interface FileSystem

Parameters:

path - the path of a file system entry.

Returns:

true if the file system entry at path has child entries; false otherwise.

Throws:

FileSystemException

init

public void init()

Description copied from interface: FileSystem

Initialize the file system

Specified by:

init in interface FileSystem

isFile

public boolean isFile(String path)
               throws FileSystemException

Description copied from interface: FileSystem

Tests whether the file system entry denoted by this path exists and is a file.

Specified by:

isFile in interface FileSystem

Parameters:

path - the path of a file system entry.

Returns:

true if the file system entry at path is a file; false otherwise.

Throws:

FileSystemException

isFolder

public boolean isFolder(String path)
                 throws FileSystemException

Description copied from interface: FileSystem

Tests whether the file system entry denoted by this path exists and is a folder.

Specified by:

isFolder in interface FileSystem

Parameters:

path - the path of a file system entry.

Returns:

true if the file system entry at path is a folder; false otherwise.

Throws:

FileSystemException

lastModified

public long lastModified(String path)
                  throws FileSystemException

Description copied from interface: FileSystem

Returns the time that the file system entry denoted by this path was last modified.

Specified by:

lastModified in interface FileSystem

Parameters:

path - the path of a file system entry.

Returns:

A long value representing the time the file system entry was last modified, measured in milliseconds since the epoch (00:00:00 GMT, January 1, 1970), or 0L if the modification time can't be determined.

Throws:

FileSystemException - if the file system entry does not exist.

length

public long length(String filePath)
            throws FileSystemException

Description copied from interface: FileSystem

Returns the length of the file denoted by this path.

Specified by:

length in interface FileSystem

Parameters:

filePath - the path of the file.

Returns:

The length, in bytes, of the file denoted by this path, or -1L if the length can't be determined.

Throws:

FileSystemException - if the path does not denote an existing file.

list

public String[] list(String folderPath)

Description copied from interface: FileSystem

Returns an array of strings naming the files and folders in the folder denoted by this path.

Specified by:

list in interface FileSystem

Parameters:

folderPath - the path of the folder whose contents is to be listed.

Returns:

an array of strings naming the files and folders in the folder denoted by this path.

listFiles

public String[] listFiles(String folderPath)

Description copied from interface: FileSystem

Returns an array of strings naming the files in the folder denoted by this path.

Specified by:

listFiles in interface FileSystem

Parameters:

folderPath - the path of the folder whose contents is to be listed.

Returns:

an array of strings naming the files in the folder denoted by this path.

listFolders

public String[] listFolders(String folderPath)

Description copied from interface: FileSystem

Returns an array of strings naming the folders in the folder denoted by this path.

Specified by:

listFolders in interface FileSystem

Parameters:

folderPath - the path of the folder whose contents is to be listed.

Returns:

an array of strings naming the folders in the folder denoted by this path.