public String detectVersion()

in plugins/org.apache.geronimo.st.v30.core/src/main/java/org/apache/geronimo/st/v30/core/GeronimoRuntimeDelegate.java [174:264]
75 lines of code
26 McCabe index (conditional complexity)

    public String detectVersion() {

        URL systemjarURL = null;

        //
        // Check lib directory first
        //
        File libDir = getRuntime().getLocation().append("lib").toFile();
        if (libDir.exists()) {
            File[] libs = libDir.listFiles();
            for (int i = 0; i < libs.length; i++) {
                if (libs[i].getName().startsWith("geronimo-system")) {
                    try {
                        systemjarURL = libs[i].toURL();
                        break;
                    }
                    catch (MalformedURLException e) {
                        e.printStackTrace();
                    }
                }
            }
        }

        // 
        // Check pre-2.1 repository if necessary
        //
        if (systemjarURL == null) {
            File systemDir = getRuntime().getLocation().append("repository/org/apache/geronimo/modules/geronimo-system").toFile();
            if (systemDir.exists() && systemDir.isDirectory() && systemDir.canRead()) {
                List<File> dirFiles = scanDirectory(systemDir);
                for (File jarFile : dirFiles) {
                    if (jarFile.getName().startsWith("geronimo-system") && jarFile.getName().endsWith("jar")) {
                        try {
                            systemjarURL = jarFile.toURL();
                            break;
                        }
                        catch (MalformedURLException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }

        // 
        // Check 2.1 repository if necessary
        //
        if (systemjarURL == null) {
            File systemDir = getRuntime().getLocation().append("repository/org/apache/geronimo/framework/geronimo-system").toFile();
            if (systemDir.exists() && systemDir.isDirectory() && systemDir.canRead()) {
                List<File> dirFiles = scanDirectory(systemDir);
                for (File jarFile : dirFiles) {
                    if (jarFile.getName().startsWith("geronimo-system") && jarFile.getName().endsWith("jar")) {
                        try {
                            systemjarURL = jarFile.toURL();
                            break;
                        }
                        catch (MalformedURLException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }

        if (systemjarURL != null) {
        	try {
				String version = null;
				JarFile jar = new JarFile(systemjarURL.getFile());
				Enumeration<JarEntry> entries = jar.entries();
				while(entries.hasMoreElements()){
					JarEntry entry = entries.nextElement();
					if (entry.getName().indexOf("geronimo-version.properties")!=-1 ||
							entry.getName().indexOf("server-version.properties")!=-1 ){
						InputStream is = jar.getInputStream(entry);
						Properties properties = new Properties();
						properties.load(is);
						 version = properties.getProperty("version");
						 is.close();
					}
				}
				jar.close();
				return version;
				
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
        }
        return null;
    }