ewe.database
Class DatabaseObject.MetaData

java.lang.Object
  ewe.util.Errorable
      ewe.io.BasicStreamObject
          ewe.io.BlockingStreamObject
              ewe.database.DatabaseObject.MetaData

All Implemented Interfaces:

BasicStream, Stream, Streamable

Enclosing class:

DatabaseObject

protected abstract class DatabaseObject.MetaData

extends BlockingStreamObject

Field Summary

int	numberOfFragments This is only valid after a read operation.

Fields inherited from class ewe.io.BasicStreamObject

closed

Fields inherited from class ewe.util.Errorable

error

Constructor Summary

protected

DatabaseObject.MetaData(String name)

Method Summary

abstract boolean	delete()
byte[]	openAndReadAll()
ByteArray	openAndReadAll(ByteArray ba)
abstract boolean	openForAppending(boolean mustExist)
abstract void	openForOverwriting(int bytesNeededToWrite)
abstract int	openForReading()
abstract void	openForReplacing(int bytesNeededToWrite)
abstract int	read(byte[] data, int offset, int length) Reads bytes into a buffer.
void	readAll(byte[] data, int offset, int length)
abstract long	size()
abstract void	write(byte[] data, int offset, int length) Writes bytes from a buffer to the Stream.

Methods inherited from class ewe.io.BlockingStreamObject

close, closeStream, flush, flushStream, isOpen, nonBlockingRead, nonBlockingWrite, readBytes, readBytes, writeBytes, writeBytes

Methods inherited from class ewe.io.BasicStreamObject

getException, getName, read, read, throwIOException, toInputStream, toOutputStream, toStream, write, write

Methods inherited from class ewe.util.Errorable

returnError, returnError, returnError

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, toString

Field Detail

numberOfFragments

public int numberOfFragments

This is only valid after a read operation.

Constructor Detail

DatabaseObject.MetaData

protected DatabaseObject.MetaData(String name)

Method Detail

openForReplacing

public abstract void openForReplacing(int bytesNeededToWrite)
                               throws IOException

Throws:

IOException

openForAppending

public abstract boolean openForAppending(boolean mustExist)
                                  throws IOException

Throws:

IOException

openForOverwriting

public abstract void openForOverwriting(int bytesNeededToWrite)
                                 throws IOException

Throws:

IOException

openForReading

public abstract int openForReading()
                            throws IOException

Throws:

IOException

write

public abstract void write(byte[] data,
                           int offset,
                           int length)
                    throws IOException

Description copied from interface: Stream

Writes bytes from a buffer to the Stream. This method blocks the current Coroutine until all bytes are written, but allows others to continue executing.

Specified by:

write in interface Stream

Overrides:

write in class BlockingStreamObject

Throws:

IOException

read

public abstract int read(byte[] data,
                         int offset,
                         int length)
                  throws IOException

Description copied from interface: Stream

Reads bytes into a buffer. This method blocks the current Coroutine, but allows others to continue executing.

Specified by:

read in interface Stream

Overrides:

read in class BlockingStreamObject

Throws:

IOException

size

public abstract long size()
                   throws IOException

Throws:

IOException

delete

public abstract boolean delete()
                        throws IOException

Throws:

IOException

readAll

public void readAll(byte[] data,
                    int offset,
                    int length)
             throws IOException

Throws:

IOException

openAndReadAll

public ByteArray openAndReadAll(ByteArray ba)
                         throws IOException

Throws:

IOException

openAndReadAll

public byte[] openAndReadAll()
                      throws IOException

Throws:

IOException