content: /**
   * ﻿Copyright (C) 2007 - 2019 52°North Initiative for Geospatial Open Source
   * Software GmbH
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published
   * by the Free Software Foundation.
   *
   * If the program is linked with libraries which are licensed under one of
   * the following licenses, the combination of the program with the linked
   * library is not considered a "derivative work" of the program:
   *
   *       • Apache License, version 2.0
   *       • Apache Software License, version 1.0
   *       • GNU Lesser General Public License, version 3
   *       • Mozilla Public License, versions 1.0, 1.1 and 2.0
   *       • Common Development and Distribution License (CDDL), version 1.0
   *
   * Therefore the distribution of the program linked with libraries licensed
   * under the aforementioned licenses, is permitted by the copyright holders
   * if the distribution is compliant with both the GNU General Public
   * License version 2 and the aforementioned licenses.
   *
   * As an exception to the terms of the GPL, you may copy, modify,
   * propagate, and distribute a work formed by combining 52°North WPS
   * GeoTools Modules with the Eclipse Libraries, or a work derivative of
   * such a combination, even if such copying, modification, propagation, or
   * distribution would otherwise violate the terms of the GPL. Nothing in
   * this exception exempts you from complying with the GPL in all respects
   * for all of the code used other than the Eclipse Libraries. You may
   * include this exception and its grant of permissions when you distribute
   * 52°North WPS GeoTools Modules. Inclusion of this notice with such a
   * distribution constitutes a grant of such permissions. If you do not wish
   * to grant these permissions, remove this paragraph from your
   * distribution. "52°North WPS GeoTools Modules" means the 52°North WPS
   * modules using GeoTools functionality - software licensed under version 2
   * or any later version of the GPL, or a work based on such software and
   * licensed under the GPL. "Eclipse Libraries" means Eclipse Modeling
   * Framework Project and XML Schema Definition software distributed by the
   * Eclipse Foundation and licensed under the Eclipse Public License Version
   * 1.0 ("EPL"), or a work based on such software and licensed under the EPL.
   *
   * 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 General
   * Public License for more details.
   */
  package org.n52.wps.io.datahandler.parser;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.geotools.data.collection.ListFeatureCollection;
  import org.geotools.feature.FeatureCollection;
  import org.geotools.geojson.feature.FeatureJSON;
  import org.geotools.geojson.geom.GeometryJSON;
  import org.n52.wps.io.data.IData;
  import org.n52.wps.io.data.binding.complex.GTVectorDataBinding;
  import org.n52.wps.io.data.binding.complex.JTSGeometryBinding;
  import org.opengis.feature.simple.SimpleFeature;
  
  import com.vividsolutions.jts.geom.Geometry;
  import com.vividsolutions.jts.geom.GeometryCollection;
  
  /**
   * 
   * 
   * This class parses json into JTS geometries.
   *         
   *  @author BenjaminPross(bpross-52n)
   * 
   */
  public class GeoJSONParser extends AbstractParser {
  
  	private static Logger LOGGER = LoggerFactory.getLogger(GeoJSONParser.class);
  
  	public GeoJSONParser() {
  		super();
  		supportedIDataTypes.add(JTSGeometryBinding.class);
  		supportedIDataTypes.add(GTVectorDataBinding.class);
  	}
  
  	@Override
  	public IData parse(InputStream input, String mimeType, String schema) {
  
  		String geojsonstring = "";
  
  		String line = "";
  
  		BufferedReader breader = new BufferedReader(
  				new InputStreamReader(input));
  
  		try {
  			while ((line = breader.readLine()) != null) {
  				geojsonstring = geojsonstring.concat(line);
  			}
  		} catch (IOException e) {
  			LOGGER.error("Exception while reading inputstream.", e);
  		} finally {
  			try {
  				input.close();
  			} catch (IOException e) {
  				LOGGER.error(e.getMessage(), e);
  			}
  		}
  
  		if (geojsonstring.contains("FeatureCollection")) {
  
  			try {
  				FeatureCollection<?, ?> featureCollection = new FeatureJSON()
  						.readFeatureCollection(geojsonstring);
  
  				return new GTVectorDataBinding(featureCollection);
  
  			} catch (IOException e) {
  				LOGGER.info("Could not read FeatureCollection from inputstream");
  			}
  
  		} else if (geojsonstring.contains("Feature")) {
  
  			try {
  				SimpleFeature feature = new FeatureJSON().readFeature(geojsonstring);
  
  				List<SimpleFeature> featureList = new ArrayList<SimpleFeature>();
  
  				featureList.add(feature);
  				
  				ListFeatureCollection featureCollection = new ListFeatureCollection(
  						feature.getFeatureType(), featureList);
  
  				return new GTVectorDataBinding(featureCollection);
  
  			} catch (IOException e) {
  				LOGGER.info("Could not read Feature from inputstream");
  			}
  
  		} else if (geojsonstring.contains("GeometryCollection")) {
  
  			try {
  				GeometryCollection g = new GeometryJSON().readGeometryCollection(geojsonstring);
  
  				return new JTSGeometryBinding(g);
  
  			} catch (IOException e) {
  				LOGGER.info("Could not read GeometryCollection from inputstream.");
  			}
  
  		} else if(geojsonstring.contains("Point") || 
  				geojsonstring.contains("LineString") ||
  				geojsonstring.contains("Polygon") ||
  				geojsonstring.contains("MultiPoint") ||
  				geojsonstring.contains("MultiLineString") ||
  				geojsonstring.contains("MultiPolygon")){
  
  			try {
  				Geometry g = new GeometryJSON().read(geojsonstring);
  
  				return new JTSGeometryBinding(g);
  
  			} catch (IOException e) {
  				LOGGER.info("Could not read single Geometry from inputstream.");
  			}
  
  		}
  		LOGGER.error("Could not parse inputstream, returning null.");
  		return null;
  	}
  
  }
  