Class URLFile

java.lang.Object

org.apache.derby.impl.io.InputStreamFile<URLStorageFactory>

org.apache.derby.impl.io.URLFile

All Implemented Interfaces:

StorageFile

class URLFile
extends InputStreamFile<URLStorageFactory>

This class provides a http based implementation of the StorageFile interface. It is used by the database engine to access persistent data and transaction logs under the http and https subsubprotocols.

Field Summary

Fields inherited from class InputStreamFile

nameStart, path, storageFactory

Fields inherited from interface StorageFile

EXCLUSIVE_FILE_LOCK, EXCLUSIVE_FILE_LOCK_NOT_AVAILABLE, NO_FILE_LOCK_SUPPORT

Constructor Summary

Constructors

Modifier	Constructor	Description
(package private)	URLFile(URLFile dir, String name)
(package private)	URLFile(URLStorageFactory storageFactory, String path)
private	URLFile(URLStorageFactory storageFactory, String child, int pathLen)
(package private)	URLFile(URLStorageFactory storageFactory, String parent, String name)

Method Summary

Modifier and Type	Method	Description
boolean	exists()	Tests whether the named file exists.
InputStream	getInputStream()	Creates an input stream from a file name.
(package private) StorageFile	getParentDir(int pathLen)	Get the parent of this file.

Methods inherited from class InputStreamFile

canWrite, createNewFile, delete, deleteAll, equals, getCanonicalPath, getExclusiveFileLock, getName, getOutputStream, getOutputStream, getParentDir, getPath, getRandomAccessFile, hashCode, isDirectory, limitAccessToOwner, list, mkdir, mkdirs, releaseExclusiveFileLock, renameTo, setReadOnly, toString

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

URLFile

URLFile(URLStorageFactory storageFactory,
 String path)

URLFile

URLFile(URLStorageFactory storageFactory,
 String parent,
 String name)

URLFile

URLFile(URLFile dir,
 String name)

URLFile

private URLFile(URLStorageFactory storageFactory,
 String child,
 int pathLen)

Method Details

exists

public boolean exists()

Tests whether the named file exists.

Specified by:

exists in interface StorageFile

Specified by:

exists in class InputStreamFile<URLStorageFactory>

Returns:

true if the named file exists, false if not.

getParentDir

StorageFile getParentDir(int pathLen)

Get the parent of this file.

Specified by:

getParentDir in class InputStreamFile<URLStorageFactory>

Parameters:

pathLen - the length of the parent's path name.

getInputStream

public InputStream getInputStream()
                           throws FileNotFoundException

Creates an input stream from a file name.

Specified by:

getInputStream in interface StorageFile

Specified by:

getInputStream in class InputStreamFile<URLStorageFactory>

Returns:

an input stream suitable for reading from the file.

Throws:

FileNotFoundException - if the file is not found.