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.raster;
  
  import java.awt.image.RenderedImage;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import javax.media.jai.JAI;
  import javax.media.jai.RenderedOp;
  import javax.media.jai.TiledImage;
  
  import org.geotools.coverage.grid.GridCoverage2D;
  import org.geotools.coverage.grid.GridCoverageFactory;
  import org.geotools.feature.FeatureCollection;
  import org.n52.wps.io.data.IData;
  import org.n52.wps.io.data.binding.complex.GTRasterDataBinding;
  import org.n52.wps.io.data.binding.complex.GTVectorDataBinding;
  import org.n52.wps.server.AbstractSelfDescribingAlgorithm;
  import org.opengis.coverage.grid.GridCoverage;
  
  public class AddRasterValues extends AbstractSelfDescribingAlgorithm{
  
  
  	public Class getInputDataType(String id) {
  		return GTRasterDataBinding.class;
  		
  	
  	}
  
  	public Class getOutputDataType(String id) {
  		return GTRasterDataBinding.class;
  	}
  
  	@Override
  	public List<String> getInputIdentifiers() {
  		List<String> identifierList =  new ArrayList<String>();
  		identifierList.add("dataset1");
  		identifierList.add("dataset2");
  		return identifierList;
  	}
  
  	@Override
  	public List<String> getOutputIdentifiers() {
  		List<String> identifierList =  new ArrayList<String>();
  		identifierList.add("result");
  		return identifierList;
  	}
  
  
  	@Override
  	public Map<String, IData> run(Map<String, List<IData>> inputData) {
  		if(inputData==null || !inputData.containsKey("dataset1")){
  			throw new RuntimeException("Error while allocating input parameters");
  		}
  		
  		List<IData> dataList1 = inputData.get("dataset1");
  		if(dataList1 == null || dataList1.size() != 1){
  			throw new RuntimeException("Error while allocating input parameters");
  		}
  		IData dataset1 = dataList1.get(0);
  		GridCoverage2D gridCoverage1 = (GridCoverage2D) dataset1.getPayload();
  		RenderedImage image1 = gridCoverage1.getRenderedImage();
  		
  		if(inputData==null || !inputData.containsKey("dataset2")){
  			throw new RuntimeException("Error while allocating input parameters");
  		}
  		
  		List<IData> dataList2 = inputData.get("dataset2");
  		if(dataList2 == null || dataList2.size() != 1){
  			throw new RuntimeException("Error while allocating input parameters");
  		}
  		IData dataset2 = dataList2.get(0);
  		GridCoverage2D gridCoverage2 = (GridCoverage2D) dataset2.getPayload();
  		RenderedImage image2 = gridCoverage2.getRenderedImage();
  		
  		RenderedOp resultImage = JAI.create("add",image1, image2);
  		
  		GridCoverageFactory gcf = new GridCoverageFactory();
          GridCoverage2D output =  gcf.create("result", resultImage, gridCoverage1.getEnvelope());
  
         
  		HashMap<String,IData> resulthash = new HashMap<String,IData>();
  		resulthash.put("result", new GTRasterDataBinding(output));
  		return resulthash;
  	
  	}
  	
  		
  		
  	
  }
  