private void unPackArchive()

in org.apache.easyant4e/src/org/apache/easyant4e/ivyde/extension/RepositoryInstaller.java [49:97]
46 lines of code
9 McCabe index (conditional complexity)

    private void unPackArchive(File installDir) throws IOException {
        InputStream inputStream = this.interpreterZipUrl.openStream();
        ZipInputStream zipFileStream = new ZipInputStream(inputStream);
        ZipEntry zipEntry = zipFileStream.getNextEntry();
        while (zipEntry != null) {
            File destination = new File(installDir.getPath(), zipEntry.getName());
            if (!zipEntry.isDirectory()) {
                /*
                 * Copy files (and make sure parent directory exist)
                 */
                File parentFile = destination.getParentFile();
                boolean parentFileExist = isFileExists(parentFile);
                if (!parentFileExist) {
                    parentFileExist = parentFile.mkdirs();
                }
                if (parentFileExist) {
                    OutputStream os = null;
                    try {
                        os = new FileOutputStream(destination);
                        byte[] buffer = new byte[BUFFER_SIZE];
                        while (true) {
                            int len = zipFileStream.read(buffer);
                            if (zipFileStream.available() == 0) {
                                break;
                            }
                            os.write(buffer, 0, len);
                        }
                    } finally {
                        if (null != os) {
                            os.close();
                        }
                    }
                } else {
                    Activator.getEasyAntPlugin().log(IStatus.ERROR,
                            "Installing EasyAnt repository, but " + parentFile + " already exists!");
                }
            } else {
                boolean created = destination.mkdirs();
                if (!created) {
                    Activator.getEasyAntPlugin().log(IStatus.ERROR,
                            "Installing EasyAnt repository. Cannot create directory: " + destination);
                }
            }
            zipFileStream.closeEntry();
            zipEntry = zipFileStream.getNextEntry();
        }
        inputStream.close();
        zipFileStream.close();
    }