public SSLContextBuilder loadTrustMaterial(

            final KeyStore truststore,

            final TrustStrategy trustStrategy) throws NoSuchAlgorithmException, KeyStoreException {

        final TrustManagerFactory tmfactory = TrustManagerFactory.getInstance(

                TrustManagerFactory.getDefaultAlgorithm());

        tmfactory.init(truststore);

        final TrustManager[] tms = tmfactory.getTrustManagers();

        if (tms != null) {

            if (trustStrategy != null) {

                for (int i = 0; i < tms.length; i++) {

                    final TrustManager tm = tms[i];

                    if (tm instanceof X509TrustManager) {

                        tms[i] = new TrustManagerDelegate(

                                (X509TrustManager) tm, trustStrategy);

                    }

                }

            }

            for (final TrustManager tm : tms) {

                this.trustmanagers.add(tm);

            }

        }

        return this;

    }