/** * Copyright (C) 2007 - 2016 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.server.algorithm.convexhull; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.UUID; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.geotools.feature.DefaultFeatureCollections; import org.geotools.feature.FeatureCollection; import org.geotools.feature.FeatureIterator; import org.n52.wps.io.GTHelper; import org.n52.wps.io.data.IData; import org.n52.wps.io.data.binding.complex.GTVectorDataBinding; import org.n52.wps.server.AbstractSelfDescribingAlgorithm; import org.opengis.feature.Feature; import org.opengis.feature.simple.SimpleFeature; import org.opengis.feature.simple.SimpleFeatureType; import org.opengis.referencing.crs.CoordinateReferenceSystem; import com.vividsolutions.jts.algorithm.ConvexHull; import com.vividsolutions.jts.geom.Coordinate; import com.vividsolutions.jts.geom.Geometry; import com.vividsolutions.jts.geom.GeometryFactory; /** * @author Benjamin Pross (bpross-52n) * */ public class ConvexHullAlgorithm extends AbstractSelfDescribingAlgorithm { Logger LOGGER = LoggerFactory.getLogger(ConvexHullAlgorithm.class); private List<String> errors = new ArrayList<String>(); public List<String> getErrors() { return errors; } public Class getInputDataType(String id) { if (id.equalsIgnoreCase("FEATURES")) { return GTVectorDataBinding.class; } return null; } public Class getOutputDataType(String id) { return GTVectorDataBinding.class; } public Map<String, IData> run(Map<String, List<IData>> inputData) { if (inputData == null || !inputData.containsKey("FEATURES")) { throw new RuntimeException( "Error while allocating input parameters"); } List<IData> dataList = inputData.get("FEATURES"); if (dataList == null || dataList.size() != 1) { throw new RuntimeException( "Error while allocating input parameters"); } IData firstInputData = dataList.get(0); FeatureCollection featureCollection = ((GTVectorDataBinding) firstInputData) .getPayload(); FeatureIterator iter = featureCollection.features(); List<Coordinate> coordinateList = new ArrayList<Coordinate>(); int counter = 0; Geometry unifiedGeometry = null; while (iter.hasNext()) { SimpleFeature feature = (SimpleFeature) iter.next(); if (feature.getDefaultGeometry() == null) { throw new NullPointerException( "defaultGeometry is null in feature id: " + feature.getID()); } Geometry geom = (Geometry) feature.getDefaultGeometry(); Coordinate[] coordinateArray = geom.getCoordinates(); for(Coordinate coordinate : coordinateArray){ coordinateList.add(coordinate); } } Coordinate[] coordinateArray = new Coordinate[coordinateList.size()]; for(int i = 0; i<coordinateList.size(); i++){ coordinateArray[i] = coordinateList.get(i); } ConvexHull convexHull = new ConvexHull(coordinateArray, new GeometryFactory()); Geometry out = convexHull.getConvexHull(); Feature feature = createFeature(out, featureCollection.getSchema().getCoordinateReferenceSystem()); FeatureCollection fOut = DefaultFeatureCollections.newCollection(); fOut.add(feature); HashMap<String, IData> result = new HashMap<String, IData>(); result.put("RESULT", new GTVectorDataBinding(fOut)); return result; } private Feature createFeature(Geometry geometry, CoordinateReferenceSystem crs) { String uuid = UUID.randomUUID().toString(); SimpleFeatureType featureType = GTHelper.createFeatureType(geometry, uuid, crs); GTHelper.createGML3SchemaForFeatureType(featureType); Feature feature = GTHelper.createFeature("0", geometry, featureType); return feature; } @Override public List<String> getInputIdentifiers() { List<String> identifierList = new ArrayList<String>(); identifierList.add("FEATURES"); return identifierList; } @Override public List<String> getOutputIdentifiers() { List<String> identifierList = new ArrayList<String>(); identifierList.add("RESULT"); return identifierList; } }