Util.java

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

import java.io.InputStream;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.faces.FacesException;

import org.nuxeo.theme.protocol.nxtheme.Connection;

import com.sun.faces.util.FacesLogger;

/**
 * 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 ";

    // Log instance for this class
    private static final Logger LOGGER = FacesLogger.APPLICATION.getLogger();

    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 (Exception e) {
            throw new FacesException(LAST_MODIFIED_ERROR + url, e);
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (Exception e) {
                    if (LOGGER.isLoggable(Level.FINEST)) {
                        LOGGER.log(Level.FINEST, "Closing stream", e);
                    }
                }
            }
        }
        return lastModified;
    }

}