uk.ac.starlink.vo

Class GlotsServiceFinder

java.lang.Object

uk.ac.starlink.vo.GlotsServiceFinder

All Implemented Interfaces:

TapServiceFinder

public class GlotsServiceFinder
extends Object
implements TapServiceFinder

TapServiceFinder implementation that uses the GloTS schema maintained (at time of writing) at the GAVO Data Center. GloTS is a non-standard registry containing metadata gathered by hook or by crook from all known registered TAP services.

It is not very respectable to use this resource; the correct way to find out this kind of thing is using the standard interfaces of the IVOA Registry. However, at time of writing (June 2015) the Registry does not contain sufficiently detailed metadata (in particular, lists of table names and descriptions for each service) to do the job, while GloTS does.

Since:

30 Jun 2015

Author:

Mark Taylor

Nested Class Summary

Nested classes/interfaces inherited from interface uk.ac.starlink.vo.TapServiceFinder

TapServiceFinder.Constraint, TapServiceFinder.Service, TapServiceFinder.Table, TapServiceFinder.Target

Field Summary

Fields

Modifier and Type	Field and Description
static String	GAVO_DC_TAP_URL

Constructor Summary

Constructors

Constructor and Description
GlotsServiceFinder() Constructs a default instance.
GlotsServiceFinder(TapService glotsService, ContentCoding coding) Constructs an instance with custom configuration.

Method Summary

Modifier and Type	Method and Description
TapServiceFinder.Service[]	readAllServices() Reads basic metadata about all known TAP services.
TapServiceFinder.Table[]	readSelectedTables(TapServiceFinder.Constraint constraint) Locates a list of tables from a global list of all known tables served by all known TAP services that satisfy a given constraint.

Methods inherited from class java.lang.Object

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

Field Detail

GAVO_DC_TAP_URL

public static final String GAVO_DC_TAP_URL

See Also:

Constant Field Values

Constructor Detail

GlotsServiceFinder

public GlotsServiceFinder()

Constructs a default instance.

GlotsServiceFinder

public GlotsServiceFinder(TapService glotsService,
                          ContentCoding coding)

Constructs an instance with custom configuration.

Parameters:

glotsService - TAP service description for a service containing GloTS tables

coding - controls HTTP-level compression during TAP queries

Method Detail

readAllServices

public TapServiceFinder.Service[] readAllServices()
                                           throws IOException

Description copied from interface: TapServiceFinder

Reads basic metadata about all known TAP services. May be slow.

Specified by:

readAllServices in interface TapServiceFinder

Returns:

list of TAP services

Throws:

IOException

readSelectedTables

public TapServiceFinder.Table[] readSelectedTables(TapServiceFinder.Constraint constraint)
                                            throws IOException

Description copied from interface: TapServiceFinder

Locates a list of tables from a global list of all known tables served by all known TAP services that satisfy a given constraint.

Specified by:

readSelectedTables in interface TapServiceFinder

Parameters:

constraint - object indicating the tables of interest

Returns:

list of tables matching constraint

Throws:

IOException