GTBinZippedSHPParser.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.io.datahandler.parser;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.UUID;

import org.geotools.data.DataStore;
import org.geotools.data.shapefile.ShapefileDataStore;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.n52.wps.io.IOUtils;
import org.n52.wps.io.data.binding.complex.GTVectorDataBinding;

public class GTBinZippedSHPParser extends AbstractParser {
	
	public GTBinZippedSHPParser(){
		super();
		supportedIDataTypes.add(GTVectorDataBinding.class);
	}
	
	/**
	 * @throws RuntimeException
	 *             if an error occurs while writing the stream to disk or
	 *             unzipping the written file
	 * @see org.n52.wps.io.IParser#parse(java.io.InputStream)
	 */
	@Override
	public GTVectorDataBinding parse(InputStream stream, String mimeType, String schema) {
		try {
			String fileName = "tempfile" + UUID.randomUUID() + ".zip";
			String tmpDirPath = System.getProperty("java.io.tmpdir");
			File tempFile = new File(tmpDirPath + File.separatorChar + fileName);
			finalizeFiles.add(tempFile); // mark tempFile for final delete
			try {
				FileOutputStream outputStream = new FileOutputStream(tempFile);
				byte buf[] = new byte[4096];
				int len;
				while ((len = stream.read(buf)) > 0) {
					outputStream.write(buf, 0, len);
				}
				outputStream.close();
				stream.close();
			} catch (FileNotFoundException e) {
				System.gc();
				throw new RuntimeException(e);
			} catch (IOException e1) {
				System.gc();
				throw new RuntimeException(e1);
			}
			File shp = IOUtils.unzip(tempFile, "shp").get(0);
			DataStore store = new ShapefileDataStore(shp.toURI().toURL());
			SimpleFeatureCollection features = store.getFeatureSource(
					store.getTypeNames()[0]).getFeatures();
			System.gc();
			
			return new GTVectorDataBinding(features);
		} catch (IOException e) {
			throw new RuntimeException(
					"An error has occurred while accessing provided data", e);
		}
	}


	
}