Package fr.gael.drb.impl.file

Implementation of DRB for the support of Files and Directories of the local File System.

See:
Description

Class Summary

File	File or Directory of a local file system.
FileFactory	Factory of local file or directory nodes.
FileNode	File or Directory of a local file system.
FileProvider	File provider.

Package fr.gael.drb.impl.file Description

Implementation of DRB for the support of Files and Directories of the local File System.

This implementation wraps local and remote file systems. It builds the tree of nodes through files and directories. Each of these nodes has a name corresponding to the file or the directory name it has wrapped on the file system. Its attributes varies according to the file system and the operating system. It is useful to browse the local file system as a file manager. The file nodes have no specific attribute. The nodes of the File implementation are mutable nodes and can therefore be modified. It is thus possible to rename a File or a Directory, to change the overall content of the Files or to move the Files across the file system.

This implementation has been designed to maximize the access efficiency. For instance, as far as possible the data source is not accessed while browsing the logical tree of nodes without extracting any value on demand.

The fr.gael.drb.impl.file contains the FileFactory class which builds the tree structure. This implementation is based on the java.io package. It wraps data file as long as their path is described according to URL syntax defined by the W3C Uniform Resource Identifier . The name of a file node is simply the file name.

File node attributes	Mandatory	Type	Description
directory	YES	boolean	Identifies files which are directories
size		long	Specifies the number bytes in the file
readable		boolean	Specifies whether the file is readable or not
writable		boolean	Specifies whether the file is writable or not
hidden		boolean	Specifies whether the file is hidden or not.
modified		dateTime	Specifies the last modification time of the file.

Attributes of the nodes bound to this implementation