org.apache.jcs.auxiliary.disk.block
Class BlockDiskElementDescriptor

java.lang.Object
  org.apache.jcs.auxiliary.disk.block.BlockDiskElementDescriptor

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable

public class BlockDiskElementDescriptor
extends java.lang.Object
implements java.io.Serializable, java.io.Externalizable

This represents an element on disk. This is used when we persist the keys. We only store the block addresses in memory. We don't need the length here, since all the blocks are the same size receyle bin.

Author:

Aaron Smuts

See Also:

Serialized Form

Constructor Summary

BlockDiskElementDescriptor()

Method Summary

int[]	getBlocks() This holds the block numbers.
java.io.Serializable	getKey()
void	readExternal(java.io.ObjectInput input) Saves on reflection.
void	setBlocks(int[] blocks)
void	setKey(java.io.Serializable key)
java.lang.String	toString() For debugging.
void	writeExternal(java.io.ObjectOutput output) Saves on reflection.

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockDiskElementDescriptor

public BlockDiskElementDescriptor()

Method Detail

setKey

public void setKey(java.io.Serializable key)

Parameters:

key - The key to set.

getKey

public java.io.Serializable getKey()

Returns:

Returns the key.

setBlocks

public void setBlocks(int[] blocks)

Parameters:

blocks - The blocks to set.

getBlocks

public int[] getBlocks()

This holds the block numbers. An item my be dispersed between multiple blocks.

Returns:

Returns the blocks.

toString

public java.lang.String toString()

For debugging.

Overrides:

toString in class java.lang.Object

Returns:

Info on the descriptor.

readExternal

public void readExternal(java.io.ObjectInput input)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Saves on reflection.

(non-Javadoc)

Specified by:

readExternal in interface java.io.Externalizable

Throws:

java.io.IOException

java.lang.ClassNotFoundException

See Also:

Externalizable.readExternal(java.io.ObjectInput)

writeExternal

public void writeExternal(java.io.ObjectOutput output)
                   throws java.io.IOException

Saves on reflection.

(non-Javadoc)

Specified by:

writeExternal in interface java.io.Externalizable

Throws:

java.io.IOException

See Also:

Externalizable.writeExternal(java.io.ObjectOutput)