return targetClassLoader;
        }
        if (thisClassLoader != null) {
            return thisClassLoader;
        }

        final ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader();
        if (systemClassLoader != null) {
            return systemClassLoader;
        }

        throw new ClIllegalStateException(MessageFormatter.getMessage("ECL0001", "ClassLoader"));
    }

    /**

        for (final File jarFile : jarFiles) {
            try (FileSystem fs = FileSystems.newFileSystem(jarFile.toPath(), ClassLoader.getSystemClassLoader())) {
                final Path xmlPath = fs.getPath("fess_ds++.xml");
                try (InputStream is = Files.newInputStream(xmlPath)) {