org.deegree.ogcwebservices.csw.discovery
Class Discovery

java.lang.Object
  org.deegree.ogcwebservices.csw.discovery.Discovery

public class Discovery
extends Object

The Discovery class allows clients to discover resources registered in a catalogue, by providing four operations named query,present, describeRecordType, and getDomain. This class has a required association from the Catalogue Service class, and is thus always implemented by all Catalogue Service implementations. The Session class can be included with the Discovery class, in associations with the Catalogue Service class. The "e;query"e; and "e;present"e; operations may be executed in a session or stateful context. If a session context exists, the dynamic model uses internal states of the session and the allowed transitions between states. When the "e;query"e; and "e;present"e; state does not include a session between a server and a client, any memory or shared information between the client and the server may be based on private understandings or features available in the protocol binding. The describeRecordType and getDomain operations do not require a session context.

Version:

$Revision: 7571 $, $Date: 2007-06-14 13:56:27 +0200 (Do, 14 Jun 2007) $

Author:

Andreas Poth , Torsten Friebe , last edited by: $Author: rbezema $

Constructor Summary

Discovery(WFService wfsService, CatalogueConfiguration cswConfiguration)

Method Summary

DescribeRecordResult	describeRecordType(DescribeRecord request) Performs the submitted DescribeRecord -request.
DomainValues	getDomain(GetDomain request)
GetRecordByIdResult	query(GetRecordById getRecordById) Performs a GetRecordById request.
GetRecordsResult	query(GetRecords getRecords) Performs a GetRecords request.

Methods inherited from class java.lang.Object

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

Constructor Detail

Discovery

public Discovery(WFService wfsService,
                 CatalogueConfiguration cswConfiguration)

Parameters:

wfsService - to contact

cswConfiguration - of this service

Method Detail

describeRecordType

public DescribeRecordResult describeRecordType(DescribeRecord request)
                                        throws OGCWebServiceException

Performs the submitted DescribeRecord -request. TODO: Check output schema & Co.

Parameters:

request -

Returns:

The DescribeRecordResult created from the given request

Throws:

OGCWebServiceException

getDomain

public DomainValues getDomain(GetDomain request)

Parameters:

request - which is not handled

Returns:

just a new empty DomainValues instance.

To do:

not implemented, yet

query

public GetRecordsResult query(GetRecords getRecords)
                       throws OGCWebServiceException

Performs a GetRecords request.

This involves the following steps:

• GetRecords->GetRecordsDocument
• GetRecordsDocument->GetFeatureDocument using XSLT
• GetFeatureDocument->GetFeature
• GetFeature request is performed against the underlying WFS
• WFS answers with a FeatureResult object (which contains a FeatureCollection)
• FeatureCollection-> GMLFeatureCollectionDocument (as a String)
• GMLFeatureCollectionDocument->GetRecordsResultDocument using XSLT
• GetRecordsResultDocument->GetRecordsResult

Parameters:

getRecords -

Returns:

GetRecordsResult

Throws:

OGCWebServiceException

query

public GetRecordByIdResult query(GetRecordById getRecordById)
                          throws OGCWebServiceException

Performs a GetRecordById request.

This involves the following steps:

• GetRecordById->GetRecordByIdDocument
• GetRecordByIdDocument->GetFeatureDocument using XSLT
• GetFeatureDocument->GetFeature
• GetFeature request is performed against the underlying WFS
• WFS answers with a FeatureResult object (which contains a FeatureCollection)
• FeatureCollection-> GMLFeatureCollectionDocument (as a String)
• GMLFeatureCollectionDocument->GetRecordsResultDocument using XSLT
• GetRecordsResultDocument->GetRecordsResult

Parameters:

getRecordById -

Returns:

The GetRecordByIdResult created from teh given GetRecordById

Throws:

OGCWebServiceException