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.server.algorithm.difference;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  import java.util.UUID;
  
  import javax.xml.namespace.QName;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.geotools.feature.DefaultFeatureCollections;
  import org.geotools.feature.FeatureCollection;
  import org.n52.wps.io.GTHelper;
  import org.n52.wps.io.SchemaRepository;
  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 com.vividsolutions.jts.geom.Geometry;
  
  
  
  public class DifferenceAlgorithm extends AbstractSelfDescribingAlgorithm {
  	
  	private static Logger LOGGER = LoggerFactory.getLogger(DifferenceAlgorithm.class);
  	
  	public DifferenceAlgorithm() {
  		super();
  	}
  
  	private List<String> errors = new ArrayList<String>();
  	public List<String> getErrors() {
  		return errors;
  	}
  	
  	
  	
  	public Map<String, IData> run(Map<String, List<IData>> inputData) {
  		/*----------------------Polygons Input------------------------------------------*/
  		if(inputData==null || !inputData.containsKey("Polygons1")){
  			throw new RuntimeException("Error while allocating input parameters");
  		}
  		List<IData> dataList = inputData.get("Polygons1");
  		if(dataList == null || dataList.size() != 1){
  			throw new RuntimeException("Error while allocating input parameters");
  		}
  		IData firstInputData = dataList.get(0);
  				
  		FeatureCollection polygons = ((GTVectorDataBinding) firstInputData).getPayload();
  		
  		/*----------------------LineStrings Input------------------------------------------*/
  		if(inputData==null || !inputData.containsKey("Polygons2")){
  			throw new RuntimeException("Error while allocating input parameters");
  		}
  		List<IData> dataListLS = inputData.get("Polygons2");
  		if(dataListLS == null || dataListLS.size() != 1){
  			throw new RuntimeException("Error while allocating input parameters");
  		}
  		IData secondInputData = dataListLS.get(0);
  				
  		FeatureCollection lineStrings = ((GTVectorDataBinding) secondInputData).getPayload();
  		
  		
  		System.out.println("****************************************************************");
  		System.out.println("difference algorithm started");
  		System.out.println("polygons size = " + polygons.size());
  		System.out.println("lineStrings size = " + lineStrings.size());
  		
  		FeatureCollection featureCollection = DefaultFeatureCollections.newCollection();
  		
  		Iterator polygonIterator = polygons.iterator();
  		int j = 1;
  		
  		String uuid = UUID.randomUUID().toString();
  		while(polygonIterator.hasNext()){
  			SimpleFeature polygon = (SimpleFeature) polygonIterator.next();
  
  		
  			Iterator lineStringIterator = lineStrings.iterator();
  			int i = 1;
  			System.out.println("Polygon = " + j +"/"+ polygons.size());
  			SimpleFeatureType featureType = null; 
  			while(lineStringIterator.hasNext()){
  				SimpleFeature lineString = (SimpleFeature) lineStringIterator.next();
  				Geometry lineStringGeometry = null;
  				lineStringGeometry = (Geometry) lineString.getDefaultGeometry();
  				
  				try{	
  					Geometry polygonGeometry = (Geometry) polygon.getDefaultGeometry();
  					Geometry intersection = polygonGeometry.difference(lineStringGeometry);
  					if(i==1){
  						 featureType = GTHelper.createFeatureType(polygon.getProperties(), intersection, uuid, polygon.getFeatureType().getCoordinateReferenceSystem());
  						 QName qname = GTHelper.createGML3SchemaForFeatureType(featureType);
  						 SchemaRepository.registerSchemaLocation(qname.getNamespaceURI(), qname.getLocalPart());
  					}
  					
  				
  					Feature resultFeature = GTHelper.createFeature(""+j+"_"+i, intersection,featureType, polygon.getProperties());
  					if(resultFeature!=null){
  								
  						featureCollection.add(resultFeature);
  						System.out.println("result feature added. resultCollection = " + featureCollection.size());
  					}
  				}catch(Exception e){
  						e.printStackTrace();
  					}
  				
  				i++;
  			}
  			j++;
  			//if(featureCollection.size()>10){
  			//	break;
  			//}
  		}
  		
  		
  		HashMap<String,IData> resulthash = new HashMap<String,IData>();
  		resulthash.put("result", new GTVectorDataBinding(featureCollection));
  		return resulthash;
  	}
  	
  
  	
  	
  	
  	public Class getInputDataType(String id) {
  		return GTVectorDataBinding.class;
  	
  	}
  
  	public Class getOutputDataType(String id) {
  		return GTVectorDataBinding.class;
  	}
  	
  	@Override
  	public List<String> getInputIdentifiers() {
  		List<String> identifierList =  new ArrayList<String>();
  		identifierList.add("Polygons1");
  		identifierList.add("Polygons2");
  		return identifierList;
  	}
  
  	@Override
  	public List<String> getOutputIdentifiers() {
  		List<String> identifierList =  new ArrayList<String>();
  		identifierList.add("result");
  		return identifierList;
  	}
  	
  }