SelfCleaningFileInputStream.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.
 *
 * 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.database;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * After calling close on this InputStream, will attempt to delete the
 * underlying file
 *
 * @author isuftin (Ivan Suftin, USGS)
 */
public class SelfCleaningFileInputStream extends FileInputStream {

	private static final Logger LOGGER = LoggerFactory.getLogger(SelfCleaningFileInputStream.class);
	private File file;

	public SelfCleaningFileInputStream(File file) throws FileNotFoundException {
		super(file);
	}

	@Override
	public void close() throws IOException {
		super.close();
		
		String path = file.getAbsolutePath();
		if (!file.exists()) {
			LOGGER.debug("File at {} does not exist", path);
		} else if (!file.isFile()) {
			LOGGER.debug("File at {} is not a file", path);
		} else if (!file.canWrite()) {
			LOGGER.debug("File at {} can not be written to", path);
		} else {
			FileUtils.deleteQuietly(file);
		}
	}
}