CRSRest.java

/*
 *    Constellation - An open source and standard compliant SDI
 *    http://www.constellation-sdi.org
 *
 * Copyright 2014 Geomatys.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.constellation.rest.api;


import org.apache.sis.storage.DataStoreException;
import org.apache.sis.util.logging.Logging;
import org.constellation.admin.dto.CoordinateReferenceSystemDTO;
import org.constellation.configuration.StringList;
import org.constellation.dto.CRSCoverageList;
import org.constellation.utils.CRSUtilities;
import org.constellation.ws.CstlServiceException;
import org.constellation.ws.rs.LayerProviders;
import org.geotoolkit.referencing.CRS;
import org.opengis.referencing.crs.CRSAuthorityFactory;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.util.FactoryException;
import org.springframework.stereotype.Component;

import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;


/**
 * REST API to access to EPSG
 *
 * @author bgarcia
 * @version 0.9
 * @since 0.9
 *
 */
@Component
@Path("/1/crs")
@Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
@Consumes({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
public class CRSRest {

    private static final Logger LOGGER = Logging.getLogger("org.constellation.rest.api");

    /**
     * @return All EPSG CRS
     */
    @GET
    @Path("all/{start}/{nbByPage}/{filter}")
    public Response getAll(@PathParam("start") int start, @PathParam("nbByPage") int nbByPage, @PathParam("filter") String filter){
        final CRSCoverageList coverageList = CRSUtilities.pagingAndFilterCode(start, nbByPage, filter);
        return Response.ok(coverageList).build();
    }

    /**
     * Return all EPSG code with there description/name.
     * This method is similar to {@link org.constellation.rest.api.ProviderRest#getAllEpsgCode(int, String)} but doesn't
     * need domain id and provider id which are useless.
     *
     * @return a list of {@link org.constellation.admin.dto.CoordinateReferenceSystemDTO}
     */
    @GET
    @Produces("application/json")
    public Response getAllEPSG() {
        try {
            final CRSAuthorityFactory factory = CRS.getAuthorityFactory(Boolean.FALSE);
            final Set<String> authorityCodes = factory.getAuthorityCodes(CoordinateReferenceSystem.class);

            final List<CoordinateReferenceSystemDTO> crss = new ArrayList<>();
            for (String code : authorityCodes) {
                final String codeAndName = code + " - " + factory.getDescriptionText(code).toString();
                crss.add(new CoordinateReferenceSystemDTO(code, codeAndName));
            }
            return Response.ok().entity(crss).build();
        } catch (FactoryException ex) {
            LOGGER.log(Level.WARNING, "Unable to load EPSG codes : "+ex.getMessage(), ex);
            return Response.serverError().entity("Unable to load EPSG codes : "+ex.getMessage()).build();
        }
    }

    /**
     * Return all EPSG code with there description/name.
     * This method is similar to {@link org.constellation.rest.api.ProviderRest#getAllEpsgCode(int, String)} but doesn't
     * need domain id and provider id which are useless.
     *
     * @param filter an optional filter parameter applied on code and crs name.
     * @return a list of {@link org.constellation.admin.dto.CoordinateReferenceSystemDTO}
     */
    @GET
    @Path("/filter/{filter}")
    @Produces("application/json")
    public Response getAllEPSG(@PathParam("filter") String filter) {
        try {
            final CRSAuthorityFactory factory = CRS.getAuthorityFactory(Boolean.FALSE);
            final Set<String> authorityCodes = factory.getAuthorityCodes(CoordinateReferenceSystem.class);

            if (filter != null) {
                filter = filter.toLowerCase();
            }

            final List<CoordinateReferenceSystemDTO> crss = new ArrayList<>();
            for (String code : authorityCodes) {
                final String codeAndName = code + " - " + factory.getDescriptionText(code).toString();

                if (filter != null && codeAndName.toLowerCase().contains(filter)) {
                    crss.add(new CoordinateReferenceSystemDTO(code, codeAndName));
                }
            }
            return Response.ok().entity(crss).build();
        } catch (FactoryException ex) {
            LOGGER.log(Level.WARNING, "Enable to load EPSG codes : "+ex.getMessage(), ex);
            return Response.serverError().entity("Enable to load EPSG codes : "+ex.getMessage()).build();
        }
    }

    /**
     * return crs list string for a layer
     * @param providerId provider identifier which contain layer
     * @param LayerId layer identifier on provider
     * @return crs {@link String} {@link java.util.List}
     */
    @GET
    @Path("{id}/{layer}")
    public Response getCrsList(@PathParam("id") final String providerId, @PathParam("layer") final String LayerId){
        List<String> crs;
        try {
            crs = LayerProviders.getCrs(providerId, LayerId);
        } catch (CstlServiceException | IOException | DataStoreException e) {
            LOGGER.log(Level.WARNING, "error when search CRS", e);
            return Response.status(Response.Status.BAD_REQUEST).build();
        }
        final StringList sl = new StringList(crs);
        return Response.ok(sl).build();
    }
}