/*
* 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;
import java.util.ArrayList;
import java.util.List;
import org.geomajas.global.ExceptionCode;
import org.geomajas.global.GeomajasException;
import org.geomajas.layer.RasterLayer;
import org.geomajas.layer.RasterLayerService;
import org.geomajas.layer.tile.RasterTile;
import org.geomajas.security.GeomajasSecurityException;
import org.geomajas.security.SecurityContext;
import org.geomajas.service.ConfigurationService;
import org.geomajas.service.pipeline.PipelineCode;
import org.geomajas.service.pipeline.PipelineContext;
import org.geomajas.service.pipeline.PipelineService;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.vividsolutions.jts.geom.Envelope;
/**
* Implementation of {@link org.geomajas.layer.RasterLayerService}, a service which allows accessing data from a
* raster layer.
* <p/>
* All access to vector layers should be done through this service, not by accessing the layer directly as this
* adds possible caching, security etc. These services are implemented using pipelines (see
* {@link org.geomajas.service.pipeline.PipelineService}) to make them configurable.
*
* @author Joachim Van der Auwera
*/
@Component
public class RasterLayerServiceImpl extends LayerServiceImpl implements RasterLayerService {
private final Logger log = LoggerFactory.getLogger(RasterLayerServiceImpl.class);
@Autowired
private ConfigurationService configurationService;
@Autowired
private SecurityContext securityContext;
@Autowired
private PipelineService pipelineService;
private RasterLayer getRasterLayer(String layerId) throws GeomajasException {
if (!securityContext.isLayerVisible(layerId)) {
throw new GeomajasSecurityException(ExceptionCode.LAYER_NOT_VISIBLE, layerId, securityContext.getUserId());
}
RasterLayer layer = configurationService.getRasterLayer(layerId);
if (null == layer) {
throw new GeomajasException(ExceptionCode.RASTER_LAYER_NOT_FOUND, layerId);
}
return layer;
}
public List<RasterTile> getTiles(String layerId, CoordinateReferenceSystem crs, Envelope bounds, double scale)
throws GeomajasException {
log.debug("getTiles start on layer {}", layerId);
long ts = System.currentTimeMillis();
PipelineContext context = pipelineService.createContext();
context.put(PipelineCode.LAYER_ID_KEY, layerId);
RasterLayer layer = getRasterLayer(layerId);
context.put(PipelineCode.LAYER_KEY, layer);
context.put(PipelineCode.CRS_KEY, crs);
context.put(PipelineCode.BOUNDS_KEY, bounds);
context.put(PipelineCode.SCALE_KEY, scale);
List<RasterTile> response = new ArrayList<RasterTile>();
pipelineService.execute(PipelineCode.PIPELINE_GET_RASTER_TILES, layerId, context, response);
log.debug("getTiles done on layer {}, time {}s", layerId, (System.currentTimeMillis() - ts) / 1000.0);
return response;
}
}