override fun isSupported(): Boolean = Companion.isSupported()

  @SuppressLint("NewApi")
  override fun getSelectedProtocol(sslSocket: SSLSocket): String? {
    return try {
      // SSLSocket.getApplicationProtocol returns "" if application protocols values will not
      // be used. Observed if you didn't specify SSLParameters.setApplicationProtocols
      when (val protocol = sslSocket.applicationProtocol) {
        null, "" -> null

    sslSocket.sslParameters = sslParameters
  }

  @SuppressSignatureCheck
  override fun getSelectedProtocol(sslSocket: SSLSocket): String? {
    return try {
      // SSLSocket.getApplicationProtocol returns "" if application protocols values will not
      // be used. Observed if you didn't specify SSLParameters.setApplicationProtocols
      when (val protocol = sslSocket.applicationProtocol) {
        null, "" -> null

    platform.assumeJdk9()
    assertThat(buildIfSupported()).isNotNull()
  }

  @Test
  fun buildsWhenJdk8() {
    platform.assumeJdk8()
    try {
      SSLSocket::class.java.getMethod("getApplicationProtocol")
      // also present on JDK8 after build 252.
      assertThat(buildIfSupported()).isNotNull()
    } catch (nsme: NoSuchMethodException) {
      assertThat(buildIfSupported()).isNull()
    }
  }

  override fun isSupported(): Boolean = ConscryptPlatform.isSupported

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =
    when {
      matchesSocket(sslSocket) -> Conscrypt.getApplicationProtocol(sslSocket)
      else -> null // No TLS extensions if the socket class is custom.
    }

  override fun configureTlsExtensions(
    sslSocket: SSLSocket,
    hostname: String?,
    protocols: List<Protocol>,

      super.configureTlsExtensions(sslSocket, hostname, protocols)
    }
  }

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =
    if (Conscrypt.isConscrypt(sslSocket)) {
      Conscrypt.getApplicationProtocol(sslSocket)
    } else {
      super.getSelectedProtocol(sslSocket)
    }

  override fun newSslSocketFactory(trustManager: X509TrustManager): SSLSocketFactory {
    return newSSLContext().apply {

  override fun getChannel(): SocketChannel {
    return delegate!!.channel
  }

  override fun getHandshakeSession(): SSLSession {
    return delegate!!.handshakeSession
  }

  override fun getApplicationProtocol(): String {
    return delegate!!.applicationProtocol
  }

  override fun getHandshakeApplicationProtocol(): String {
    return delegate!!.handshakeApplicationProtocol
  }

      object : DelegatingSSLSocketFactory(sslSocketFactory) {
        override fun configureSocket(sslSocket: SSLSocket): SSLSocket {
          return object : DelegatingSSLSocket(sslSocket) {
            override fun getApplicationProtocol(): String {
              throw UnsupportedOperationException()
            }
          }
        }
      }

    client =
      client.newBuilder()