org.das2.util.filesystem

Interface Summary
Interface	Description
ExpensiveOpCache.Op
FileSystemFactory	creates a new instance of a type of filesystem
WebProtocol	template for web-based protocols to implement FileSystems
WriteCapability	The FileObject can be written.

Class Summary
Class	Description
AppletHttpProtocol	uses HTTP, and doesn't download resources to cache
DefaultHttpProtocol	This http protocol uses the local cache.
ExpensiveOpCache	This simply reduces invocations of an expensive operation by caching the result for a given number of milliseconds.
FileObject	Class for describing and accessing files in file systems.
FileSystem	Filesystems provide an abstraction layer so that clients can access any hierarchy of files in a implementation-independent way.
FileSystem.DirectoryEntry	DirectoryEntry defines a structure for containing directory entry data.
FileSystemSettings	controls for file systems.
FileSystemUtil
FSTreeModel	present a FileSystem as a TreeModel to display in JTrees.
FTPFileSystem	This original FtpFileSystem implementation is based on Java's FTP client.
FtpFileSystemFactory
GitCommand	Wrapper for git commands.
GitCommand.GitResponse	contains the exit code and messages.
GitHubFileObject
GitHubFileSystem	GitHubFileSystem allows GitHub directories to be mounted directly, even though it is not a conventional filesystem with files residing in folders.
Glob	known bug: *.java matches ".java".
HtmlUtil	HTML utilities, such as getting a directory listing, where a "file" is a link below the directory we are listing, and read a URL into a String.
HttpFileSystem	Make a web folder accessible.
HttpFileSystemFactory	Creates a FileSystem for reading files via HTTP and HTTPS.
HttpUtil	Utilities for HTTP protocol, such as a cache for the HEAD metadata.
KeyChain	class that contains the credentials for websites.
LocalFileObject	Provide access to local files.
LocalFileSystem
LocalFileSystemFactory
SubFileSystem	present part of a filesystem as a filesystem.
VFSFileObject	This class is part of a wrapper for the Apache Commons VFS.
VFSFileSystem	FileSystem provides additional abstraction to Apache VFS to implement das2 FileSystems, and provide SFTP access.
VFSFileSystemFactory
WebFileObject
WebFileSystem	Base class for HTTP and FTP-based filesystems.
ZipFileObject	A file within a Zip file
ZipFiles	class taken from http://www.journaldev.com/957/java-zip-file-folder-example, thanks Pankaj.
ZipFileSystem	A filesystem to read data from zip files.
ZipFileSystemFactory	creates a ZipFileSystem

Enum Summary
Enum Description

FileSystemSettings.Persistence

Enum Summary
Enum	Description
FileSystemSettings.Persistence

Exception Summary
Exception	Description
FileSystem.FileSystemOfflineException	Exception indicating the file system is off-line.
URIException	marker interface for URI syntax, motivated by file://home (two slashes)

Package org.das2.util.filesystem Description

The fileSystem package introduces a filesystem abstraction that allows various types of file systems to be accessed in a convenient and uniform way. (A file system is a heirarchical set of files.) This allows clients to "mount" an ftp site and access the files easily and in the same way a local file system would be.

FileStorageModel is a class that models how filenames are constructed within a filesystem from times when files are used to implement a database.

FileSystem defines the interface clients see. Implementations of this include HTTPFileSystem, FTPFileSystem, and LocalFileSystem. FileObjects provide access to Files within the FileSystem, and metadata about the file.

HtmlUtil provides generally useful methods, such as scraping all the URL references from a stream. GlobUtil converts os globs like *.dat to regular expressions.

ZipFileSystem allows a Zip file to be mounted just like any other filesystem. Note it has been implemented in Autoplot's DataSource package and was finally moved to here. The DataSource package may have other FileSystem implementations which could be migrated into here.