org.das2.util.filesystem
Class HttpFileSystem

java.lang.Object
  org.das2.util.filesystem.FileSystem
      org.das2.util.filesystem.WebFileSystem
          org.das2.util.filesystem.HttpFileSystem

public class HttpFileSystem
extends WebFileSystem

Nested Class Summary

Nested classes/interfaces inherited from class org.das2.util.filesystem.FileSystem

FileSystem.DirectoryEntry, FileSystem.FileSystemOfflineException

Field Summary

Fields inherited from class org.das2.util.filesystem.WebFileSystem

localRoot, offline, PROP_OFFLINE, protocol

Fields inherited from class org.das2.util.filesystem.FileSystem

logger, PROP_CASE_INSENSITIVE, properties

Method Summary

static HttpFileSystem	createHttpFileSystem(java.net.URL root)
protected void	downloadFile(java.lang.String filename, java.io.File f, java.io.File partFile, ProgressMonitor monitor) Transfers the file from the remote store to a local copy f.
protected java.util.Map<java.lang.String,java.lang.Object>	getHeadMeta(java.lang.String f) this is introduced to support checking if the symbol foo/bar is a folder by checking for a 303 redirect.
boolean	isDirectory(java.lang.String filename) dumb method looks for / in parent directory's listing.
java.lang.String[]	listDirectory(java.lang.String directory) returns a list of the names of the files in a directory.
java.lang.String[]	listDirectory(java.lang.String directory, java.lang.String regex) returns a list of the names of the files in a directory that match regex.

Methods inherited from class org.das2.util.filesystem.WebFileSystem

addPropertyChangeListener, copyStream, getDownloadDirectory, getFileObject, getLocalName, getLocalName, getLocalRoot, getLocalRootAbsPath, getURL, isAppletMode, isOffline, localRoot, removePropertyChangeListener, setAppletMode, setOffline, toString

Methods inherited from class org.das2.util.filesystem.FileSystem

create, createFileSystem, getProperty, getRootURL, registerFileSystemFactory, settings, splitUrl, toCanonicalFilename, toCanonicalFolderName

Methods inherited from class java.lang.Object

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

Method Detail

createHttpFileSystem

public static HttpFileSystem createHttpFileSystem(java.net.URL root)
                                           throws FileSystem.FileSystemOfflineException

Throws:

FileSystem.FileSystemOfflineException

downloadFile

protected void downloadFile(java.lang.String filename,
                            java.io.File f,
                            java.io.File partFile,
                            ProgressMonitor monitor)
                     throws java.io.IOException

Description copied from class: WebFileSystem

Transfers the file from the remote store to a local copy f. This should only be used within the class and subclasses, clients should use getFileObject( String ).getFile(). Subclasses implementing this should download data to partfile, then rename partfile to f after the download is complete.

Specified by:

downloadFile in class WebFileSystem

partFile - the temporary file during download.

Throws:

java.io.IOException

getHeadMeta

protected java.util.Map<java.lang.String,java.lang.Object> getHeadMeta(java.lang.String f)
                                                                throws java.io.IOException

this is introduced to support checking if the symbol foo/bar is a folder by checking for a 303 redirect. EXIST->Boolean REAL_NAME->String

Parameters:

f -

Throws:

java.io.IOException

isDirectory

public boolean isDirectory(java.lang.String filename)
                    throws java.io.IOException

dumb method looks for / in parent directory's listing. Since we have to list the parent, then IOException can be thrown.

Specified by:

isDirectory in class WebFileSystem

Throws:

java.io.IOException

listDirectory

public java.lang.String[] listDirectory(java.lang.String directory)
                                 throws java.io.IOException

Description copied from class: FileSystem

returns a list of the names of the files in a directory. Names ending in "/" are themselves directories, and the "/" is not part of the name. This is optional, and a directory may or may not be tagged with the trailing slash.

Specified by:

listDirectory in class WebFileSystem

Throws:

java.io.IOException

listDirectory

public java.lang.String[] listDirectory(java.lang.String directory,
                                        java.lang.String regex)
                                 throws java.io.IOException

Description copied from class: FileSystem

returns a list of the names of the files in a directory that match regex. Trailing slashes on directory names are not part of the name and need not be part of the regex.

Overrides:

listDirectory in class WebFileSystem

Throws:

java.io.IOException