AddRasterValues.java

/**
 * 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.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;
	
	}
	
		
		
	
}