org.geomajas.internal.layer.RasterLayerServiceImpl Maven / Gradle / Ivy

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/*
 * This file is part of Geomajas, a component framework for building
 * rich Internet applications (RIA) with sophisticated capabilities for the
 * display, analysis and management of geographic information.
 * It is a building block that allows developers to add maps
 * and other geographic data capabilities to their web applications.
 *
 * Copyright 2008-2010 Geosparc, http://www.geosparc.com, Belgium
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 */

package org.geomajas.internal.layer;

import com.vividsolutions.jts.geom.Envelope;
import org.geomajas.global.ExceptionCode;
import org.geomajas.global.GeomajasException;
import org.geomajas.security.GeomajasSecurityException;
import org.geomajas.layer.RasterLayer;
import org.geomajas.layer.tile.RasterTile;
import org.geomajas.service.pipeline.PipelineCode;
import org.geomajas.service.pipeline.PipelineContext;
import org.geomajas.service.pipeline.PipelineService;
import org.geomajas.security.SecurityContext;
import org.geomajas.service.ConfigurationService;
import org.geomajas.service.GeoService;
import org.geomajas.layer.RasterLayerService;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;

/**
 * Implementation of {@link org.geomajas.layer.RasterLayerService}, a service which allows accessing data from a
 * raster layer.
 * 
 * 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 implements RasterLayerService {

	@Autowired
	private ConfigurationService configurationService;

	@Autowired
	private SecurityContext securityContext;

	@Autowired
	private GeoService geoService;

	@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 getTiles(String layerId, CoordinateReferenceSystem crs, Envelope bounds, double scale)
			throws GeomajasException {
		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 response = new ArrayList();
		pipelineService.execute(PipelineCode.PIPELINE_GET_RASTER_TILES, layerId, context, response);
		return response;
	}
}