org.nuxeo.theme.jsf.facelets.vendor.Util.java Source code

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Here is the source code for org.nuxeo.theme.jsf.facelets.vendor.Util.java

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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
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 */

package org.nuxeo.theme.jsf.facelets.vendor;

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

import javax.faces.FacesException;

import org.apache.commons.io.IOUtils;
import org.nuxeo.theme.protocol.nxtheme.Connection;

/**
 * Util methods for facelets management.
 * <p>
 * Patch getLastModified for theme behaviour.
 *
 * @since 6.0
 */
public class Util {

    public static final String LAST_MODIFIED_ERROR = "Error Checking Last Modified for ";

    public static long getLastModified(URL url) {
        long lastModified;
        URLConnection conn;
        InputStream is = null;

        try {
            conn = url.openConnection();

            if (conn instanceof JarURLConnection) {
                /*
                 * Note this is a work around for JarURLConnection since the getLastModified method is buggy. See
                 * JAVASERVERFACES-2725 and JAVASERVERFACES-2734.
                 */
                JarURLConnection jarUrlConnection = (JarURLConnection) conn;
                URL jarFileUrl = jarUrlConnection.getJarFileURL();
                URLConnection jarFileConnection = jarFileUrl.openConnection();
                lastModified = jarFileConnection.getLastModified();
                jarFileConnection.getInputStream().close();
            } else if (conn instanceof Connection) {
                // Nuxeo patch: do not bother opening connection to get last
                // modified time
                lastModified = conn.getLastModified();
            } else {
                is = conn.getInputStream();
                lastModified = conn.getLastModified();
            }
        } catch (IOException e) {
            throw new FacesException(LAST_MODIFIED_ERROR + url, e);
        } finally {
            IOUtils.closeQuietly(is);
        }
        return lastModified;
    }

}