private static void extractJar()

in modules/jdktools/src/main/java/org/apache/harmony/tools/jar/Main.java [163:230]
55 lines of code
15 McCabe index (conditional complexity)

    private static void extractJar(String[] args) throws Exception {
        boolean verboseFlag = false, fileFlag = false;

        // Check for expected and unexpected flags
        for (int i=1; i<args[0].length(); i++) {
            switch (args[0].charAt(i)) {
            case 'v':
                verboseFlag = true;
                break;
            case 'f':
                fileFlag = true;
                break;
            default:
                System.out.println("Error: Illegal option for -x: '"+args[0].charAt(i)+"'");
                return;
            }
        }

        if (fileFlag && args.length<2) {
            // Options specify 'f' but there is no filename present
            System.out.println("Error: No file name specified for 'f' option");
            return;
        }
    
        ZipInputStream zis;
        if (!fileFlag) {
            // Read from stdin
            if (verboseFlag) System.out.println("Reading input from stdin");
            zis = new ZipInputStream(System.in);
        } else {
            // Read from the specified file
            if (verboseFlag) System.out.println("Reading jar file: "+args[1]);
            zis = new ZipInputStream(new FileInputStream(new File(args[1])));
        }

        // Read the zip entries - format and print their data
        ZipEntry ze;
        String workingDir = System.getProperty("user.dir");
        
        while ((ze = zis.getNextEntry()) != null) {
            if (ze.isDirectory()) {
                // create a new directory of the same name
                File newDir = new File(ze.getName());
                if (! newDir.exists()) {
                    newDir.mkdirs();
                }
                if (verboseFlag) {
                    System.out.println("created: " + ze.getName());
                }
            } else {
                // extract the file to the appropriate directory
                File f = new File(workingDir + File.separator + ze.getName());
                f.createNewFile();
                FileOutputStream fos = new FileOutputStream(f);
                int i;
                while ((i = zis.read()) != -1) {
                    fos.write(i);
                }
                fos.close();
                if (verboseFlag) {
                    System.out.println("inflated: " + ze.getName());
                }
            }
            zis.closeEntry();
        }

        zis.close();
    }