com.esri.geoevent.solutions.processor.geometry.PolygonProcessor.java Source code

Introduction

Here is the source code for com.esri.geoevent.solutions.processor.geometry.PolygonProcessor.java

Source

package com.esri.geoevent.solutions.processor.geometry;

/*
 * #%L
 * Esri :: AGES :: Solutions :: Processor :: Geometry
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2013 - 2014 Esri
 * %%
 * 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.
 * #L%
 */

import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.JsonParser;

import com.esri.core.geometry.GeometryEngine;
import com.esri.core.geometry.MapGeometry;
import com.esri.core.geometry.Point;
import com.esri.core.geometry.Polygon;
import com.esri.core.geometry.SpatialReference;
import com.esri.ges.core.component.ComponentException;
import com.esri.ges.core.geoevent.GeoEvent;
import com.esri.ges.processor.GeoEventProcessorBase;
import com.esri.ges.processor.GeoEventProcessorDefinition;
import com.esri.ges.spatial.GeometryException;
import com.esri.ges.spatial.Spatial;

public class PolygonProcessor extends GeoEventProcessorBase {
    Spatial spatial;
    private static final Log LOG = LogFactory.getLog(PolygonProcessor.class);
    private SpatialReference srIn;
    private SpatialReference srBuffer;
    private SpatialReference srOut;

    public PolygonProcessor(GeoEventProcessorDefinition definition, Spatial s) throws ComponentException {
        super(definition);
        spatial = s;
        geoEventMutator = true;
    }

    @Override
    public GeoEvent process(GeoEvent evt) {
        try {
            int inwkid = (Integer) properties.get("wkidin").getValue();
            int outwkid = (Integer) properties.get("wkidout").getValue();
            //int bufferwkid = (Integer) properties.get("wkidbuffer").getValue();
            srIn = SpatialReference.create(inwkid);
            //srBuffer = SpatialReference.create(bufferwkid);
            srOut = SpatialReference.create(outwkid);

            String eventfld = properties.get("polyfld").getValue().toString();
            String[] arr = eventfld.split(":");
            String geostring = (String) evt.getField(arr[1]);

            String format = properties.get("polyformat").getValue().toString();
            com.esri.ges.spatial.Geometry geo = null;
            if (format.equals("Json")) {
                geo = constructJsonGeometry(geostring);
            } else if (format.equals("CAP")) {
                geo = constructCAPGeometry(geostring);
            }
            evt.setGeometry(geo);
            return evt;
        } catch (Exception ex) {
            LOG.error(ex.getMessage());
            LOG.error(ex.getStackTrace());
            return null;
        }
    }

    private com.esri.ges.spatial.Geometry constructJsonGeometry(String jsongeo) {
        try {
            String jsonOut = jsongeo;
            JsonFactory jf = new JsonFactory();
            JsonParser json = jf.createJsonParser(jsongeo);
            MapGeometry mgeo = GeometryEngine.jsonToGeometry(json);
            if (!mgeo.getSpatialReference().equals(srOut)) {
                com.esri.core.geometry.Geometry geo = mgeo.getGeometry();
                com.esri.core.geometry.Geometry projGeo = GeometryEngine.project(geo, srIn, srOut);
                jsonOut = GeometryEngine.geometryToJson(srOut, projGeo);
            }
            return spatial.fromJson(jsonOut);
        } catch (JsonParseException ex) {
            LOG.error("Unable to parse json");
            LOG.error(ex.getMessage());
            LOG.error(ex.getStackTrace());
            return null;
        } catch (IOException ex) {
            LOG.error(ex.getMessage());
            LOG.error(ex.getStackTrace());
            return null;
        } catch (GeometryException ex) {
            LOG.error(ex.getMessage());
            LOG.error(ex.getStackTrace());
            return null;
        }
    }

    private com.esri.ges.spatial.Geometry constructCAPGeometry(String geoString) throws GeometryException {
        try {
            String[] pairs = geoString.split(" ");

            Polygon polygon = new Polygon();
            Boolean firstit = true;
            for (String coords : pairs) {

                String[] tuple = coords.split(",");
                Double x = Double.parseDouble(tuple[0]);
                Double y = Double.parseDouble(tuple[1]);
                Point p = new Point(x, y);
                Double z = Double.NaN;
                if (tuple.length > 2) {
                    z = Double.parseDouble(tuple[2]);
                    p.setZ(z);
                }
                if (firstit) {
                    polygon.startPath(p);
                    firstit = false;
                } else {
                    polygon.lineTo(p);
                }
            }
            polygon.closeAllPaths();
            String json = GeometryEngine.geometryToJson(srIn, polygon);
            return spatial.fromJson(json);
        } catch (GeometryException ex) {
            LOG.error(ex.getMessage());
            LOG.error(ex.getStackTrace());
            return null;
        }
    }

}