public static KeyStore loadStore()

in modules/jdktools/src/main/java/org/apache/harmony/tools/toolutils/KeyStoreLoaderSaver.java [64:132]
60 lines of code
13 McCabe index (conditional complexity)

    public static KeyStore loadStore(String path, String storeType, char[] storePass,
            String providerName) throws FileNotFoundException,
            KeyStoreException, NoSuchAlgorithmException, CertificateException,
            IOException, NoSuchProviderException{

        BufferedInputStream bis;
        // if the path is given, make a FileInputStream on it
        if (path != null) {
            File ksFile = null;
            URI uri = null;
            try {
                uri = new URI(path);
                ksFile = new File(uri);
            } catch (URISyntaxException e) {
                ksFile = new File(path);
            } catch (IllegalArgumentException e){
                ksFile = new File(path);
            }
            
            if (!ksFile.exists()) {
                throw new IOException("Keystore file does not exist");
            }
            if (ksFile.length() == 0) {
                throw new IOException("Keystore file exists but is empty");
            }
            bis = new BufferedInputStream(new FileInputStream(ksFile));
        } else { // if the path is not given, a new keystore will be created
            bis = null;
        }

        // Set the store type to default if it is not given.
        // The default value is set up in java.security file.
        String checkedStoreType = (storeType != null) ? storeType : KeyStore
                .getDefaultType();
        KeyStore keyStore;
        // if the provider name is not set
        if (providerName == null) {
            keyStore = KeyStore.getInstance(checkedStoreType);
        } else {
            try {
                keyStore = KeyStore.getInstance(storeType, providerName);
            } catch (NoSuchProviderException e) {
                throw (NoSuchProviderException) new NoSuchProviderException(
                        "The provider " + providerName
                                + " is not found in the environment.")
                        .initCause(e);
            }
        }

        try {
            // try to load the keystore
            keyStore.load(bis, storePass);
        } catch (NoSuchAlgorithmException e) {
            throw new NoSuchAlgorithmException(
                    "Failed to find the algorithm to check the keystore integrity",
                    e);
        } catch (CertificateException e) {
            throw new CertificateException(
                    "Failed to load a certificate from the keystore. ", e);
        } catch (IOException e) {
            throw (IOException) new IOException("Failed to load the keystore. ")
                    .initCause(e);
        } finally {
            if (bis != null) {
                bis.close();
            }
        }
        return keyStore;
    }