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org.apache.derby.impl.io
Class DirFile4  

java.lang.Object
  java.io.File
      org.apache.derby.impl.io.DirFile
          org.apache.derby.impl.io.DirFile4

All Implemented Interfaces:

java.lang.Comparable, java.io.Serializable, org.apache.derby.io.StorageFile

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class DirFile4

extends DirFile

This class implements the StorageFile interface using features of Java 1.4 not available in earlier versions of Java.

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Field Summary
private  java.nio.channels.FileLock	dbLock
private  java.nio.channels.FileChannel	lockFileChannel
private  java.io.RandomAccessFile	lockFileOpen
private  boolean	rwsOK

 

Fields inherited from class java.io.File

pathSeparator, pathSeparatorChar, separator, separatorChar

 

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

EXCLUSIVE_FILE_LOCK, EXCLUSIVE_FILE_LOCK_NOT_AVAILABLE, NO_FILE_LOCK_SUPPORT

 

Constructor Summary
(package private)	DirFile4(DirFile directoryName, java.lang.String fileName, boolean rwsOK)           Construct a DirFile from a directory name and a file name.
(package private)	DirFile4(java.lang.String path, boolean rwsOK)           Construct a DirFile from a path name.
(package private)	DirFile4(java.lang.String directoryName, java.lang.String fileName, boolean rwsOK)           Construct a DirFile from a directory name and a file name.

 

Method Summary
boolean	deleteAll()           Deletes the named file and, if it is a directory, all the files and directories it contains.
int	getExclusiveFileLock()           Get an exclusive lock.
java.io.InputStream	getInputStream()           Creates an input stream from a file name.
java.io.OutputStream	getOutputStream()           Creates an output stream from a file name.
java.io.OutputStream	getOutputStream(boolean append)           Creates an output stream from a file name.
org.apache.derby.io.StorageFile	getParentDir()           Get the name of the parent directory if this name includes a parent.
org.apache.derby.io.StorageRandomAccessFile	getRandomAccessFile(java.lang.String mode)           Get a random access (read/write) file.
(package private) static org.apache.derby.io.StorageFile	getTempDir()           Get the name of the directory of temporary files.
void	releaseExclusiveFileLock()           Release the resource associated with an earlier acquired exclusive lock
boolean	renameTo(org.apache.derby.io.StorageFile newName)           Rename the file denoted by this name.

 

Methods inherited from class java.io.File

canRead, canWrite, compareTo, compareTo, createNewFile, createTempFile, createTempFile, delete, deleteOnExit, equals, exists, getAbsoluteFile, getAbsolutePath, getCanonicalFile, getCanonicalPath, getName, getParent, getParentFile, getPath, hashCode, isAbsolute, isDirectory, isFile, isHidden, lastModified, length, list, list, listFiles, listFiles, listFiles, listRoots, mkdir, mkdirs, renameTo, setLastModified, setReadOnly, toString, toURI, toURL

 

Methods inherited from class java.lang.Object

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

 

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

canWrite, createNewFile, delete, exists, getCanonicalPath, getName, getPath, isDirectory, length, list, mkdir, mkdirs, setReadOnly, toString

 

Field Detail

lockFileOpen

private java.io.RandomAccessFile lockFileOpen

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lockFileChannel

private java.nio.channels.FileChannel lockFileChannel

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dbLock

private java.nio.channels.FileLock dbLock

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rwsOK

private final boolean rwsOK

Constructor Detail

DirFile4

DirFile4(java.lang.String path,
         boolean rwsOK)

Construct a DirFile from a path name.

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DirFile4

DirFile4(java.lang.String directoryName,
         java.lang.String fileName,
         boolean rwsOK)

Construct a DirFile from a directory name and a file name.

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DirFile4

DirFile4(DirFile directoryName,
         java.lang.String fileName,
         boolean rwsOK)

Construct a DirFile from a directory name and a file name.

Method Detail

getParentDir

public org.apache.derby.io.StorageFile getParentDir()

Get the name of the parent directory if this name includes a parent.

Specified by:

getParentDir in interface org.apache.derby.io.StorageFile

Overrides:

getParentDir in class DirFile

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getOutputStream

public java.io.OutputStream getOutputStream(boolean append)
                                     throws java.io.FileNotFoundException

Creates an output stream from a file name.

Specified by:

getOutputStream in interface org.apache.derby.io.StorageFile

Overrides:

getOutputStream in class DirFile

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getExclusiveFileLock

public int getExclusiveFileLock()

Description copied from class: DirFile

Get an exclusive lock. This is used to ensure that two or more JVMs do not open the same database at the same time.

Specified by:

getExclusiveFileLock in interface org.apache.derby.io.StorageFile

Overrides:

getExclusiveFileLock in class DirFile

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releaseExclusiveFileLock

public void releaseExclusiveFileLock()

Description copied from class: DirFile

Release the resource associated with an earlier acquired exclusive lock

Specified by:

releaseExclusiveFileLock in interface org.apache.derby.io.StorageFile

Overrides:

releaseExclusiveFileLock in class DirFile

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getRandomAccessFile

public org.apache.derby.io.StorageRandomAccessFile getRandomAccessFile(java.lang.String mode)
                                                                throws java.io.FileNotFoundException

Get a random access (read/write) file.

Specified by:

getRandomAccessFile in interface org.apache.derby.io.StorageFile

Overrides:

getRandomAccessFile in class DirFile

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getTempDir

static org.apache.derby.io.StorageFile getTempDir()
                                           throws java.io.IOException

Get the name of the directory of temporary files.

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getOutputStream

public java.io.OutputStream getOutputStream()
                                     throws java.io.FileNotFoundException

Creates an output stream from a file name.

Specified by:

getOutputStream in interface org.apache.derby.io.StorageFile

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getInputStream

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

Creates an input stream from a file name.

Specified by:

getInputStream in interface org.apache.derby.io.StorageFile

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renameTo

public boolean renameTo(org.apache.derby.io.StorageFile newName)

Rename the file denoted by this name. Note that StorageFile objects are immutable. This method renames the underlying file, it does not change this StorageFile object. The StorageFile object denotes the same name as before, however the exists() method will return false after the renameTo method executes successfully.

It is not specified whether this method will succeed if a file already exists under the new name.

Specified by:

renameTo in interface org.apache.derby.io.StorageFile

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deleteAll

public boolean deleteAll()

Deletes the named file and, if it is a directory, all the files and directories it contains.

Specified by:

deleteAll in interface org.apache.derby.io.StorageFile

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> [ io overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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