ostore.update
Class ActionExpand

java.lang.Object
  |
  +--ostore.update.Action
        |
        +--ostore.update.ActionExpand

All Implemented Interfaces:

QuickSerializable

public class ActionExpand

extends Action

This action truncates a data object. The resulting object is zero bytes in length and all data previously in the object is lost.

Version:

$Id: ActionExpand.java,v 1.21 2002/08/27 20:11:52 eaton Exp $

Author:

Patrick R. Eaton

Field Summary

static boolean

DEBUG

Constructor Summary

ActionExpand(InputBuffer buffer)

ActionExpand(SecureHash aguid, long length)
Construct an ActionExpand action.

Method Summary

long	getLength() getLength returns the length of the ActionExpand.
Set	getTargets()
void	perform(GuidVersionMap guid_map, VersionHandleCache version_cache, UpdateContinuation continuation, DataCache cache)
void	serialize(OutputBuffer buffer) Add the object to the buffer.
String	toString() Return a representation of this action as a string.

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

public static final boolean DEBUG

See Also:

Constant Field Values

Constructor Detail

ActionExpand

public ActionExpand(SecureHash aguid,
                    long length)

Construct an ActionExpand action.

Parameters:

aguid - the Aguid of the target data object

length - the length to which the action will expand the data object

ActionExpand

public ActionExpand(InputBuffer buffer)
             throws QSException

Method Detail

serialize

public void serialize(OutputBuffer buffer)

Description copied from interface: QuickSerializable

Add the object to the buffer.

Specified by:

serialize in interface QuickSerializable

Overrides:

serialize in class Action

Parameters:

buffer - the output buffer to add the object to

perform

public void perform(GuidVersionMap guid_map,
                    VersionHandleCache version_cache,
                    UpdateContinuation continuation,
                    DataCache cache)
             throws ostore.update.UpdateException

Overrides:

perform in class Action

ostore.update.UpdateException

getLength

public long getLength()

getLength returns the length of the ActionExpand.

Specified by:

getLength in class Action

Returns:

length of ActionExpand

getTargets

public Set getTargets()

Overrides:

getTargets in class Action

toString

public String toString()

Description copied from class: Action

Return a representation of this action as a string.

Specified by:

toString in class Action

Returns:

a string representation of this action