tapestry.impl
Class NullTagQuery

java.lang.Object
  |
  +--tapestry.impl.NullTagQuery

All Implemented Interfaces:

QuickSerializable, TapestryQuery

public class NullTagQuery

extends Object

implements TapestryQuery

NullTagQuery is a TapestryQuery used in a TapestryLocateMsg used to find objects identified by a NullTag.

USAGE

To receive an object identified by a NullTag, dispatch a TapestryLocateMsg that contains a NullTagQuery.

Version:

$Id: NullTagQuery.java,v 1.1.1.1 2004/03/26 19:57:06 hweather Exp $

Author:

Hakim Weatherspoon

See Also:

NullTag, TapestryTag, TapestryQuery, TapestryLocateMsg

Constructor Summary

NullTagQuery()
Creates a new NullTagQuery.

NullTagQuery(InputBuffer buffer)
Constructs a NullTagQuery from its serialized form.

Method Summary

TapestryQueryResult	query(SecureHash node_guid, SecureHash bp_guid, TapestryTag tag, TapestryQueryState state) Perform the query on the given backpointer and tag, possibly modifying the supplied state.
void	serialize(OutputBuffer buffer) Specified by ostore.util.QuickSerializable
String	toString() Specified by java.lang.Object

Methods inherited from class java.lang.Object

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

Constructor Detail

NullTagQuery

public NullTagQuery()

Creates a new NullTagQuery.

NullTagQuery

public NullTagQuery(InputBuffer buffer)
             throws QSException

Constructs a NullTagQuery from its serialized form.

Parameters:

buffer - serialized form of object.

Method Detail

serialize

public void serialize(OutputBuffer buffer)

Specified by ostore.util.QuickSerializable

Specified by:

serialize in interface QuickSerializable

query

public TapestryQueryResult query(SecureHash node_guid,
                                 SecureHash bp_guid,
                                 TapestryTag tag,
                                 TapestryQueryState state)

Description copied from interface: TapestryQuery

Perform the query on the given backpointer and tag, possibly modifying the supplied state.

Specified by:

query in interface TapestryQuery

Parameters:

node_guid - the guid of the current node

bp_guid - the guid of the node to which the backpointer points

tag - the associated tag

state - the state, passed in and (possibly) modified

Returns:

the query result

toString

public String toString()

Specified by java.lang.Object

Overrides:

toString in class Object