/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2011 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.internal.layer.vector;
import org.geomajas.global.GeomajasException;
import org.geomajas.layer.VectorLayer;
import org.geomajas.service.FilterService;
import org.geomajas.service.pipeline.PipelineCode;
import org.geomajas.service.pipeline.PipelineContext;
import org.opengis.filter.Filter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import com.vividsolutions.jts.geom.Geometry;
/**
* Extend the existing layer filter (in the context, if any) to include layer security.
* <p/>
* This combines the visible area, the security filter for the layer, the default filter for the layer,
*
* @author Joachim Van der Auwera
*/
public class LayerFilterStep extends AbstractSaveOrUpdateStep {
private final Logger log = LoggerFactory.getLogger(LayerFilterStep.class);
@Autowired
private FilterService filterService;
public void execute(PipelineContext context, Object response) throws GeomajasException {
VectorLayer layer = context.get(PipelineCode.LAYER_KEY, VectorLayer.class);
Filter filter = context.getOptional(PipelineCode.FILTER_KEY, Filter.class);
String layerId = layer.getId();
// apply generic security filter
Filter layerFeatureFilter = securityContext.getFeatureFilter(layerId);
if (null != layerFeatureFilter) {
filter = and(filter, layerFeatureFilter);
}
// apply default filter
String defaultFilter = layer.getLayerInfo().getFilter();
if (null != defaultFilter) {
filter = and(filter, filterService.parseFilter(defaultFilter));
}
// apply visible area filter
Geometry visibleArea = securityContext.getVisibleArea(layerId);
if (null != visibleArea) {
String geometryName = layer.getLayerInfo().getFeatureInfo().getGeometryType().getName();
if (securityContext.isPartlyVisibleSufficient(layerId)) {
filter = and(filter, filterService.createIntersectsFilter(visibleArea, geometryName));
} else {
filter = and(filter, filterService.createWithinFilter(visibleArea, geometryName));
}
} else {
log.warn("Visible area is null for layer " + layerId + "removing all content!");
filter = filterService.createFalseFilter();
}
context.put(PipelineCode.FILTER_KEY, filter);
}
}