com.k_int.hss
Class HeterogeneousSetOfSearchable

java.lang.Object
  |
  +--com.k_int.hss.HeterogeneousSetOfSearchable

All Implemented Interfaces:

Searchable

public class HeterogeneousSetOfSearchable

extends java.lang.Object

implements Searchable

HeterogeneousSetOfSearchable is a realisation of the com.k_int.IR.searchable interface that deals with collecting together a Heterogeneous group of objects all themselves implementing the Searchable interface. It is the responsiblilty of this class to distribute a query to each of the Searchable objects that might be identified by the hints parameter in the IRQuery object passed to the evaluateQuery method

Version:

$Id: HeterogeneousSetOfSearchable.java,v 1.12 2001/06/10 13:15:36 ianibbo Exp $

Author:

Ian Ibbotson

See Also:

Searchable, IRQuery

Fields inherited from interface com.k_int.IR.Searchable

GROUP_COORDINATOR, SPECIFIC_SOURCE

Constructor Summary

HeterogeneousSetOfSearchable()

Method Summary

SearchTask	createTask(IRQuery q, java.lang.Object user_info) Create a HSS task.
SearchTask	createTask(IRQuery q, java.lang.Object user_info, java.util.Observer[] observers) Create a HSS task.
void	destroy() destroy the searchable object.
protected void	finalize()
int	getManagerType() Returns information about the kind of Searchable object this is.
void	init(java.util.Properties p) Properties for this realisation of the Searchable interface.

Methods inherited from class java.lang.Object

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

Constructor Detail

HeterogeneousSetOfSearchable

public HeterogeneousSetOfSearchable()

Method Detail

finalize

protected void finalize()

Overrides:

finalize in class java.lang.Object

init

public void init(java.util.Properties p)

Properties for this realisation of the Searchable interface. For HeterogeneousSetOfSearchable, this must include the properties for the initial naming context in use. This will be used to find active Searchable objects. We also need the location of the repositories xml configuration file that tells us how to map generic collection id's into repositories and repository specific collections.

Specified by:

init in interface Searchable

destroy

public void destroy()

Description copied from interface: Searchable

destroy the searchable object. Shut down the searchable object entirely. Release all held resources, make the object ready for GC. Try to release in here instead of on finalize.

Specified by:

destroy in interface Searchable

getManagerType

public int getManagerType()

Returns information about the kind of Searchable object this is. in this case, always return Searchable.GROUP_COORDINATOR to indicate that this realisation of searchable does not itself search a resource directly, instead, it's task is to coordinate several other Searchable objects and make them appear to be a single resource.

Specified by:

getManagerType in interface Searchable

Following copied from interface: com.k_int.IR.Searchable

See Also:

Searchable.SPECIFIC_SOURCE, Searchable.GROUP_COORDINATOR

createTask

public SearchTask createTask(IRQuery q,
                             java.lang.Object user_info)

Create a HSS task.

Specified by:

createTask in interface Searchable

See Also:

com.k_int.IR.Searchable#evaluateQuery(IRQuery, int, object), IRQuery

createTask

public SearchTask createTask(IRQuery q,
                             java.lang.Object user_info,
                             java.util.Observer[] observers)

Create a HSS task.

Specified by:

createTask in interface Searchable

See Also:

com.k_int.IR.Searchable#evaluateQuery(IRQuery, int, Object, Observer[]), IRQuery