Paths.get(URI) that adds FileSystems

/**
 * Developer notes on {@link FileSystemNotFoundException}:
 * ================================================================================================================
 * {@link FileSystemNotFoundException} will be thrown by {@link Paths#get(URI)} if you are trying to load a resource
 * that is located within a Jar.
 * https://stackoverflow.com/questions/15713119/java-nio-file-path-for-a-classpath-resource
 *
 * {@link java.nio.file.FileSystem} implements {@link Closeable}.  That said, I am not using it inside a
 * <code>try-with-resource</code> statement because the {@link java.nio.file.FileSystem} is only created once - and
 * then other resources in the same area can be loaded with the same {@link java.nio.file.FileSystem}
 * (ie you don't have to repeatedly create and close {@link java.nio.file.FileSystem}s).
 *
 * Also, closing {@link java.nio.file.FileSystem}s are problematic, because the associated {@link Path} can then
 * no longer be used.
 * ================================================================================================================
 */
private static Path getPathFromUri(URI fileUri) {
    Assert.isNotNull(fileUri);

    Path fileOrDirectory = null;
    try {
        fileOrDirectory = Paths.get(fileUri);
    } catch (FileSystemNotFoundException e) {
        // Not sure how threadsafe FileSystems are, so being safe, rather than sorry.
        nfsLock.lock();
        try {
            // Try again, maybe another thread has created the required FileSystem
            fileOrDirectory = Paths.get(fileUri);
        } catch (FileSystemNotFoundException fsnfe) {
            // Other threads have not yet created the required FileSystem

            if (logger.isInfoEnabled()) {
                logger.info("Creating a FileSystem for classpath resource: " + fileUri);
            }

            try {
                FileSystems.newFileSystem(fileUri, Collections.<String, Object>emptyMap());
            } catch (IOException ioe) {
                String errorMessage = "A problem occurred creating a FileSystem for classpath resource: " + fileUri;
                throw new RuntimeException(errorMessage, ioe);
            }

            // Try again, now that the FileSystem has been created
            fileOrDirectory = Paths.get(fileUri);
        } finally {
            nfsLock.unlock();
        }
    }
    return fileOrDirectory;
}
private final static ReentrantLock nfsLock = new ReentrantLock();; // Lock for creating new FileSystems