com.github.jsonldjava.utils.JarCacheResource Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jsonld-java Show documentation
Json-LD core implementation
There is a newer version: 0.10.4
/*
 * Copyright (c) 2012, Deutsche Forschungszentrum für Künstliche Intelligenz GmbH
 * Copyright (c) 2012-2017, JSONLD-Java contributors
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the  nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL  BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.github.jsonldjava.utils;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import org.apache.http.client.cache.Resource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * JarCacheResource.
 *
 * @author Stian Soiland-Reyes
 * @author Peter Ansell [email protected]
 */
public class JarCacheResource implements Resource {

    private static final long serialVersionUID = -7101296464577357444L;

    private final Logger log = LoggerFactory.getLogger(getClass());

    private final URLConnection connection;

    JarCacheResource(URL classpath) throws IOException {
        this.connection = classpath.openConnection();
    }

    @Override
    public long length() {
        // TODO should be getContentLengthLong() but this is not available in
        // Java 6.
        return connection.getContentLength();
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return connection.getInputStream();
    }

    @Override
    public void dispose() {
        try {
            connection.getInputStream().close();
        } catch (final IOException e) {
            log.error("Can't close JarCacheResource input stream", e);
        }
    }
}