/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2010, Geomatys
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotoolkit.data.query;
import org.geotoolkit.data.session.Session;
/**
* Define the feature provider that will be use by the query.
* A selector reference a Session and a feature type name.
*
* This class is the counterpart of javax.jcr.query.qom.Selector
* from JSR-283 (Java Content Repository 2).
*
* @author Johann Sorel (Geomatys)
* @module
*/
public interface Selector extends Source{
/**
* In the case of mutiple selector in a query, each selector must specify
* it's session. When the query is composed of only one selector then
* the session might be null.
* @return Session never null in multiple selector query.
* might be null in single selector query.
*/
Session getSession();
/**
* Gets the name of the required feature type.
*/
String getFeatureTypeName();
/**
* Gets the selector name.
* This name is used in filter to define from which source the
* feature property comes from.
*
* @return String
*/
String getSelectorName();
}