DeriveAutomaticModuleName.java

public class DeriveAutomaticModuleName { static final Pattern DASH_VERSION = Pattern.compile("-(\\d+(\\.|$))"); static final Pattern NON_ALPHANUM = Pattern.compile("[^A-Za-z0-9]"); static final Pattern REPEATING_DOTS = Pattern.compile("(\\.)(\\1)+"); static final Pattern LEADING_DOTS = Pattern.compile("^\\."); static final Pattern TRAILING_DOTS = Pattern.compile("\\.$"); public Tuple2<String, String> deriveModuleName(final String fileName) { Objects.requireNonNull(fileName); String name = fileName; String version = null; if (fileName.endsWith(".jar")) { name = fileName.substring(0, fileName.length() - 4); } final Matcher matcher = DASH_VERSION.matcher(name); if (matcher.find()) { final int start = matcher.start(); try { final String tail = name.substring(start + 1); ModuleDescriptor.Version.parse(tail); version = tail; } catch (final IllegalArgumentException ignore) { } name = name.substring(0, start); } return Tuple.of(cleanModuleName(name), version); } public void displayModuleName(final String fileName) { final Tuple2<String, String> result = deriveModuleName(fileName); System.out.printf("%s => %s [%s]%n", fileName, result._1, result._2); } private String cleanModuleName(String mn) { // replace non-alphanumeric mn = NON_ALPHANUM.matcher(mn).replaceAll("."); // collapse repeating dots mn = REPEATING_DOTS.matcher(mn).replaceAll("."); // drop leading dots if (mn.length() > 0 && mn.charAt(0) == '.') { mn = LEADING_DOTS.matcher(mn).replaceAll(""); } // drop trailing dots final int len = mn.length(); if (len > 0 && mn.charAt(len - 1) == '.') { mn = TRAILING_DOTS.matcher(mn).replaceAll(""); } return mn; } public static void main(final String[] args) { final DeriveAutomaticModuleName moduleName = new DeriveAutomaticModuleName(); moduleName.displayModuleName("mylib.jar"); moduleName.displayModuleName("slf4j-api-1.7.25.jar"); moduleName.displayModuleName("hibernate-jpa-2.1-api-1.0.0.Final.jar"); moduleName.displayModuleName("spring-context-support-4.3.6.RELEASE.jar"); } }