org.h2.store.fs
Class FileObjectMemory

java.lang.Object
  org.h2.store.fs.FileObjectMemory

All Implemented Interfaces:

FileObject

public class FileObjectMemory
extends java.lang.Object
implements FileObject

This class represents an in-memory file.

Method Summary

void	close() Close the file.
long	getFilePointer() Get the file pointer.
java.lang.String	getName() Get the full qualified name of this file.
long	length() Get the length of the file.
void	readFully(byte[] b, int off, int len) Read from the file.
void	releaseLock() Release the file lock.
void	seek(long newPos) Go to the specified position in the file.
void	setFileLength(long newLength) Change the length of the file.
void	sync() Force changes to the physical location.
boolean	tryLock() Try to lock the file exclusively.
void	write(byte[] b, int off, int len) Write to the file.

Methods inherited from class java.lang.Object

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

Method Detail

length

public long length()

Description copied from interface: FileObject

Get the length of the file.

Specified by:

length in interface FileObject

Returns:

the length

setFileLength

public void setFileLength(long newLength)
                   throws java.io.IOException

Description copied from interface: FileObject

Change the length of the file.

Specified by:

setFileLength in interface FileObject

Parameters:

newLength - the new length

Throws:

java.io.IOException

seek

public void seek(long newPos)

Description copied from interface: FileObject

Go to the specified position in the file.

Specified by:

seek in interface FileObject

Parameters:

newPos - the new position

write

public void write(byte[] b,
                  int off,
                  int len)
           throws java.io.IOException

Description copied from interface: FileObject

Write to the file.

Specified by:

write in interface FileObject

Parameters:

b - the byte array

off - the offset

len - the number of bytes

Throws:

java.io.IOException

readFully

public void readFully(byte[] b,
                      int off,
                      int len)
               throws java.io.IOException

Description copied from interface: FileObject

Read from the file.

Specified by:

readFully in interface FileObject

Parameters:

b - the byte array

off - the offset

len - the number of bytes

Throws:

java.io.IOException

getFilePointer

public long getFilePointer()

Description copied from interface: FileObject

Get the file pointer.

Specified by:

getFilePointer in interface FileObject

Returns:

the current file pointer

close

public void close()

Description copied from interface: FileObject

Close the file.

Specified by:

close in interface FileObject

sync

public void sync()

Description copied from interface: FileObject

Force changes to the physical location.

Specified by:

sync in interface FileObject

getName

public java.lang.String getName()

Description copied from interface: FileObject

Get the full qualified name of this file.

Specified by:

getName in interface FileObject

Returns:

the name

tryLock

public boolean tryLock()

Description copied from interface: FileObject

Try to lock the file exclusively.

Specified by:

tryLock in interface FileObject

Returns:

true if locking was successful

releaseLock

public void releaseLock()

Description copied from interface: FileObject

Release the file lock.

Specified by:

releaseLock in interface FileObject