public static String getVersion()

in hawtio-util/src/main/java/io/hawt/util/Objects.java [63:119]
52 lines of code
14 McCabe index (conditional complexity)

    public static String getVersion(Class<?> aClass, String groupId, String artifactId) {
        String version = null;
        // lets try find the maven property - as the Java API rarely works :)
        InputStream is = null;
        String fileName = "/META-INF/maven/" +
                groupId + "/" + artifactId +
                "/pom.properties";
        // try to load from maven properties first
        try {
            Properties p = new Properties();
            is = aClass.getResourceAsStream(fileName);
            if (is != null) {
                p.load(is);
                version = p.getProperty("version", "");
            }
        } catch (Exception e) {
            // ignore
        } finally {
            if (is != null) {
                IOHelper.close(is, fileName, LOG);
            }
        }
        if (version == null) {
            Package aPackage = aClass.getPackage();
            if (aPackage != null) {
                version = aPackage.getImplementationVersion();
                if (Strings.isBlank(version)) {
                    version = aPackage.getSpecificationVersion();
                }
            }
        }
        if (version == null) {
            Enumeration<URL> resources = null;
            try {
                resources = aClass.getClassLoader().getResources("META-INF/MANIFEST.MF");
            } catch (IOException e) {
                // ignore
            }
            if (resources != null) {
                String expectedBundleName = groupId + "." + artifactId;
                while (resources.hasMoreElements()) {
                    try {
                        Manifest manifest = new Manifest(resources.nextElement().openStream());
                        Attributes attributes = manifest.getMainAttributes();
                        String bundleName = attributes.getValue("Bundle-SymbolicName");
                        if (Objects.equals(expectedBundleName, bundleName)) {
                            version = attributes.getValue("Implementation-Version");
                            if (Strings.isNotBlank(version)) break;
                        }
                    } catch (IOException e) {
                        // ignore
                    }
                }
            }
        }
        return version;
    }