org.apache.derby.impl.io

Class URLFile

java.lang.Object

org.apache.derby.impl.io.InputStreamFile

org.apache.derby.impl.io.URLFile

All Implemented Interfaces:

StorageFile

 class URLFile
extends InputStreamFile

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

Field Summary

Fields

Modifier and Type	Field and Description
private URLStorageFactory	storageFactory

Fields inherited from class org.apache.derby.impl.io.InputStreamFile

nameStart, path

Fields inherited from interface org.apache.derby.io.StorageFile

EXCLUSIVE_FILE_LOCK, EXCLUSIVE_FILE_LOCK_NOT_AVAILABLE, NO_FILE_LOCK_SUPPORT

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
boolean	exists() Tests whether the named file exists.
java.io.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 org.apache.derby.impl.io.InputStreamFile

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

Methods inherited from class java.lang.Object

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

Field Detail

storageFactory

private final URLStorageFactory storageFactory

Constructor Detail

URLFile

URLFile(URLStorageFactory storageFactory,
       java.lang.String path)

URLFile

URLFile(URLStorageFactory storageFactory,
       java.lang.String parent,
       java.lang.String name)

URLFile

URLFile(URLFile dir,
       java.lang.String name)

URLFile

private URLFile(URLStorageFactory storageFactory,
       java.lang.String child,
       int pathLen)

Method Detail

exists

public boolean exists()

Tests whether the named file exists.

Specified by:

exists in interface StorageFile

Specified by:

exists in class InputStreamFile

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

Parameters:

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

getInputStream

public java.io.InputStream getInputStream()
                                   throws java.io.FileNotFoundException

Creates an input stream from a file name.

Specified by:

getInputStream in interface StorageFile

Specified by:

getInputStream in class InputStreamFile

Returns:

an input stream suitable for reading from the file.

Throws:

java.io.FileNotFoundException - if the file is not found.