Package org.mycore.datamodel.niofs

Class MCRAbstractFileSystem

java.lang.Object

java.nio.file.FileSystem

org.mycore.datamodel.niofs.MCRAbstractFileSystem

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

MCRIFSFileSystem

public abstract class MCRAbstractFileSystem
extends FileSystem

Field Summary

Fields

Modifier and Type	Field	Description
static final char	SEPARATOR
static final String	SEPARATOR_STRING

Constructor Summary

Constructors

Constructor	Description
MCRAbstractFileSystem()

Method Summary

Modifier and Type	Method	Description
void	close()
abstract void	createRoot(String owner)	Creates a new root under the given name.
MCRPath	emptyPath()
static MCRAbstractFileSystem	getInstance(String scheme)	Returns any subclass that implements and handles the given scheme.
Path	getPath(String first, String... more)
static MCRPath	getPath(String owner, String path, MCRAbstractFileSystem fs)
PathMatcher	getPathMatcher(String syntaxAndPattern)
MCRPath	getRootDirectory(String owner)
String	getSeparator()
UserPrincipalLookupService	getUserPrincipalLookupService()
boolean	isOpen()
boolean	isReadOnly()
WatchService	newWatchService()
abstract void	removeRoot(String owner)	Removes a root with the given name.
Set<String>	supportedFileAttributeViews()
MCRPath	toThisFileSystem(MCRPath other)
boolean	verifies(MCRPath path)	Checks if the file for given Path is still valid.
boolean	verifies(MCRPath path, MCRFileAttributes<?> attrs)	Checks if the file for given Path is still valid.

Methods inherited from class java.nio.file.FileSystem

getFileStores, getRootDirectories, provider

Methods inherited from class java.lang.Object

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

Field Details

SEPARATOR

public static final char SEPARATOR

See Also:

• Constant Field Values

SEPARATOR_STRING

public static final String SEPARATOR_STRING

Constructor Details

MCRAbstractFileSystem

public MCRAbstractFileSystem()

Method Details

getInstance

public static MCRAbstractFileSystem getInstance(String scheme)

Returns any subclass that implements and handles the given scheme.

Parameters:

scheme - a valid URI scheme

Throws:

FileSystemNotFoundException - if no filesystem handles this scheme

See Also:

• FileSystemProvider.getScheme()

getPath

public static MCRPath getPath(String owner,
 String path,
 MCRAbstractFileSystem fs)

createRoot

public abstract void createRoot(String owner)
                         throws FileSystemException

Creates a new root under the given name. After calling this method the implementing FileSystem should be ready to accept data for this root.

Parameters:

owner - ,e.g. derivate ID

Throws:

FileSystemException - if creating the root directory fails

FileAlreadyExistsException - more specific, if the directory already exists

verifies

public boolean verifies(MCRPath path)
                 throws NoSuchFileException

Checks if the file for given Path is still valid. This should check if the file is still completely readable and the MD5 sum still matches the recorded value.

Parameters:

path - Path to the file to check

Returns:

if the file is still in good condition

Throws:

NoSuchFileException

verifies

public boolean verifies(MCRPath path,
 MCRFileAttributes<?> attrs)
                 throws NoSuchFileException

Checks if the file for given Path is still valid. This should check if the file is still completely readable and the MD5 sum still matches the recorded value. This method does the same as verifies(MCRPath) but uses the given attributes to save a file access.

Parameters:

path - Path to the file to check

attrs - matching attributes to file

Throws:

NoSuchFileException

removeRoot

public abstract void removeRoot(String owner)
                         throws FileSystemException

Removes a root with the given name. Call this method if you want to remove a stalled directory that is not in use anymore.

Parameters:

owner - ,e.g. derivate ID

Throws:

FileSystemException - if removing the root directory fails

DirectoryNotEmptyException - more specific, if the directory is not empty

NoSuchFileException - more specific, if the directory does not exist

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in class FileSystem

Throws:

IOException

emptyPath

public MCRPath emptyPath()

getPath

public Path getPath(String first,
 String... more)

Specified by:

getPath in class FileSystem

getPathMatcher

public PathMatcher getPathMatcher(String syntaxAndPattern)

Specified by:

getPathMatcher in class FileSystem

getRootDirectory

public MCRPath getRootDirectory(String owner)

getSeparator

public String getSeparator()

Specified by:

getSeparator in class FileSystem

getUserPrincipalLookupService

public UserPrincipalLookupService getUserPrincipalLookupService()

Specified by:

getUserPrincipalLookupService in class FileSystem

isOpen

public boolean isOpen()

Specified by:

isOpen in class FileSystem

isReadOnly

public boolean isReadOnly()

Specified by:

isReadOnly in class FileSystem

newWatchService

public WatchService newWatchService()
                             throws IOException

Specified by:

newWatchService in class FileSystem

Throws:

IOException

supportedFileAttributeViews

public Set<String> supportedFileAttributeViews()

Specified by:

supportedFileAttributeViews in class FileSystem

toThisFileSystem

public MCRPath toThisFileSystem(MCRPath other)