Package io.virtdata.docsys.metafs.fs.layerfs

Class LayerFS

java.lang.Object

java.nio.file.FileSystem

io.virtdata.docsys.metafs.core.MetaFS

io.virtdata.docsys.metafs.fs.layerfs.LayerFS

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class LayerFS
extends MetaFS

This filesystem is a filesystem aggregator, allowing users to provide layered views of existing filesystems. The URI is merely symbolic in this filesystem, since the user must endRenderers any wrapped filesystems separately from the call to FileSystemProvider.newFileSystem(URI, Map).

Meta Details

In general, operations are attempted on each filesystem, each with a path scoped to that filesystem instance, until the operation succeeds without throwing an error.

For operations which specify read-specific or write-specific options, any read-only filesystems are skipped when write mode is requested. By default, filesystems are registered as readonly, providing some default safety.

Field Summary

Fields inherited from class io.virtdata.docsys.metafs.core.MetaFS

isReadOnly

Constructor Summary

Constructors

Constructor	Description
LayerFS(java.lang.String name)

Method Summary

Modifier and Type	Method	Description
LayerFS	addLayer(java.nio.file.FileSystem fileSystem)
LayerFS	addLayer(java.nio.file.Path outerPath, java.lang.String pathSymbolicName)
void	checkAccess(java.nio.file.Path path, java.nio.file.AccessMode... modes)	This should be implemented per filesystem, using the signature of FileSystemProvider.checkAccess(Path, AccessMode[])
java.lang.Iterable<java.nio.file.FileStore>	getFileStores()
java.lang.String	getName()
java.nio.file.Path	getPath(java.lang.String first, java.lang.String... more)
java.nio.file.PathMatcher	getPathMatcher(java.lang.String syntaxAndPattern)
java.lang.Iterable<java.nio.file.Path>	getRootDirectories()
java.lang.String	getSeparator()
java.nio.file.attribute.UserPrincipalLookupService	getUserPrincipalLookupService()
java.util.List<java.nio.file.FileSystem>	getWrappedFilesystems()
java.nio.channels.SeekableByteChannel	newByteChannel(java.nio.file.Path path, java.util.Set<? extends java.nio.file.OpenOption> options, java.nio.file.attribute.FileAttribute<?>... attrs)
java.nio.file.WatchService	newWatchService()
LayerFSProvider	provider()
LayerFS	setWritable(boolean writable)
java.util.Set<java.lang.String>	supportedFileAttributeViews()
java.lang.String	toString()

Methods inherited from class io.virtdata.docsys.metafs.core.MetaFS

close, getRootPath, isOpen, isReadOnly, newFileChannel, newInputStream

Methods inherited from class java.lang.Object

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

Constructor Detail

LayerFS

public LayerFS(java.lang.String name)

Method Detail

setWritable

public LayerFS setWritable(boolean writable)

addLayer

public LayerFS addLayer(java.nio.file.Path outerPath,
                        java.lang.String pathSymbolicName)

addLayer

public LayerFS addLayer(java.nio.file.FileSystem fileSystem)

getRootDirectories

public java.lang.Iterable<java.nio.file.Path> getRootDirectories()

Specified by:

getRootDirectories in class java.nio.file.FileSystem

provider

public LayerFSProvider provider()

Specified by:

provider in class java.nio.file.FileSystem

getSeparator

public java.lang.String getSeparator()

Specified by:

getSeparator in class java.nio.file.FileSystem

getFileStores

public java.lang.Iterable<java.nio.file.FileStore> getFileStores()

Specified by:

getFileStores in class java.nio.file.FileSystem

supportedFileAttributeViews

public java.util.Set<java.lang.String> supportedFileAttributeViews()

Specified by:

supportedFileAttributeViews in class java.nio.file.FileSystem

getPath

public java.nio.file.Path getPath(java.lang.String first,
                                  java.lang.String... more)

Overrides:

getPath in class MetaFS

newByteChannel

public java.nio.channels.SeekableByteChannel newByteChannel(java.nio.file.Path path,
                                                            java.util.Set<? extends java.nio.file.OpenOption> options,
                                                            java.nio.file.attribute.FileAttribute<?>... attrs)
                                                     throws java.io.IOException

Specified by:

newByteChannel in class MetaFS

Throws:

java.io.IOException

getName

public java.lang.String getName()

Specified by:

getName in class MetaFS

getPathMatcher

public java.nio.file.PathMatcher getPathMatcher(java.lang.String syntaxAndPattern)

Overrides:

getPathMatcher in class MetaFS

getUserPrincipalLookupService

public java.nio.file.attribute.UserPrincipalLookupService getUserPrincipalLookupService()

Overrides:

getUserPrincipalLookupService in class MetaFS

newWatchService

public java.nio.file.WatchService newWatchService()
                                           throws java.io.IOException

Overrides:

newWatchService in class MetaFS

Throws:

java.io.IOException

getWrappedFilesystems

public java.util.List<java.nio.file.FileSystem> getWrappedFilesystems()

toString

public java.lang.String toString()

Overrides:

toString in class MetaFS

checkAccess

public void checkAccess(java.nio.file.Path path,
                        java.nio.file.AccessMode... modes)
                 throws java.io.IOException

Description copied from class: MetaFS

This should be implemented per filesystem, using the signature of FileSystemProvider.checkAccess(Path, AccessMode[])

Overrides:

checkAccess in class MetaFS

Throws:

java.io.IOException