ostore.update
Class ActionTruncate

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

All Implemented Interfaces:

QuickSerializable

public class ActionTruncate

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: ActionTruncate.java,v 1.20 2002/08/02 19:38:08 geels Exp $

Author:

Patrick R. Eaton

Field Summary

static boolean

DEBUG

Constructor Summary

ActionTruncate(InputBuffer buffer)

ActionTruncate(SecureHash target)
Construct an ActionTruncate action.

Method Summary

long	getLength() getLength returns the length of the ActionTruncate.
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

ActionTruncate

public ActionTruncate(SecureHash target)

Construct an ActionTruncate action.

Parameters:

target - the Aguid of the target data object

ActionTruncate

public ActionTruncate(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 ActionTruncate.

Specified by:

getLength in class Action

Returns:

length of ActionTruncate

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