org.siebengeisslein.core
Class TwoFile

java.lang.Object
  org.siebengeisslein.core.TwoFile

Direct Known Subclasses:

DataStoreState, FreeBlockList, GCState

public abstract class TwoFile
extends java.lang.Object

Field Summary

static int	STATE_BECOMING_INVALID
static int	STATE_INVALID
static int	STATE_VALID

Constructor Summary

TwoFile(java.lang.String file1, java.lang.String file2, boolean create)

Method Summary

void	close()
void	commit()
static int	getState(java.io.RandomAccessFile raf)
protected abstract void	init()
protected abstract void	read(java.io.RandomAccessFile file)
protected abstract void	write(java.io.RandomAccessFile file)

Methods inherited from class java.lang.Object

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

Field Detail

STATE_VALID

public static final int STATE_VALID

See Also:

Constant Field Values

STATE_INVALID

public static final int STATE_INVALID

See Also:

Constant Field Values

STATE_BECOMING_INVALID

public static final int STATE_BECOMING_INVALID

See Also:

Constant Field Values

Constructor Detail

TwoFile

public TwoFile(java.lang.String file1,
               java.lang.String file2,
               boolean create)
        throws java.io.IOException

Throws:

java.io.IOException

Method Detail

commit

public void commit()
            throws java.io.IOException

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Throws:

java.io.IOException

getState

public static int getState(java.io.RandomAccessFile raf)
                    throws java.io.IOException

Throws:

java.io.IOException

init

protected abstract void init()
                      throws java.io.IOException

Throws:

java.io.IOException

read

protected abstract void read(java.io.RandomAccessFile file)
                      throws java.io.IOException

Throws:

java.io.IOException

write

protected abstract void write(java.io.RandomAccessFile file)
                       throws java.io.IOException

Throws:

java.io.IOException