private AttributeStatement buildAttributeStatement(Map<String, String> claims) {
    AttributeStatement attStmt = null;
    if (claims != null) {
      attStmt = new AttributeStatementBuilder().buildObject();
      Iterator<String> ite = claims.keySet().iterator();

      for (int i = 0; i < claims.size(); i++) {
        Attribute attrib = new AttributeBuilder().buildObject();
        String claimUri = ite.next();
        attrib.setName(claimUri);
        // look
        // https://wiki.shibboleth.net/confluence/display/OpenSAML/OSTwoUsrManJavaAnyTypes
        XSStringBuilder stringBuilder =
            (XSStringBuilder) Configuration.getBuilderFactory().getBuilder(XSString.TYPE_NAME);
        XSString stringValue =
            stringBuilder.buildObject(AttributeValue.DEFAULT_ELEMENT_NAME, XSString.TYPE_NAME);
        stringValue.setValue(claims.get(claimUri));
        attrib.getAttributeValues().add(stringValue);
        attStmt.getAttributes().add(attrib);
      }
    }
    return attStmt;
  }
  /**
   * Parses the SecurityToken by wrapping within an AssertionWrapper.
   *
   * @param securityToken SecurityToken
   */
  private void parseToken(SecurityToken securityToken) {
    XMLStreamReader xmlStreamReader = StaxUtils.createXMLStreamReader(securityToken.getToken());

    try {
      AttrStatement attributeStatement = null;
      AuthenticationStatement authenticationStatement = null;
      Attr attribute = null;
      int attrs = 0;
      while (xmlStreamReader.hasNext()) {
        int event = xmlStreamReader.next();
        switch (event) {
          case XMLStreamConstants.START_ELEMENT:
            {
              String localName = xmlStreamReader.getLocalName();
              switch (localName) {
                case NameID.DEFAULT_ELEMENT_LOCAL_NAME:
                  name = xmlStreamReader.getElementText();
                  for (int i = 0; i < xmlStreamReader.getAttributeCount(); i++) {
                    if (xmlStreamReader
                        .getAttributeLocalName(i)
                        .equals(NameID.FORMAT_ATTRIB_NAME)) {
                      nameIDFormat = xmlStreamReader.getAttributeValue(i);
                      break;
                    }
                  }
                  break;
                case AttributeStatement.DEFAULT_ELEMENT_LOCAL_NAME:
                  attributeStatement = new AttrStatement();
                  attributeStatements.add(attributeStatement);
                  break;
                case AuthnStatement.DEFAULT_ELEMENT_LOCAL_NAME:
                  authenticationStatement = new AuthenticationStatement();
                  authenticationStatements.add(authenticationStatement);
                  attrs = xmlStreamReader.getAttributeCount();
                  for (int i = 0; i < attrs; i++) {
                    String name = xmlStreamReader.getAttributeLocalName(i);
                    String value = xmlStreamReader.getAttributeValue(i);
                    if (AuthnStatement.AUTHN_INSTANT_ATTRIB_NAME.equals(name)) {
                      authenticationStatement.setAuthnInstant(DateTime.parse(value));
                    }
                  }
                  break;
                case AuthnContextClassRef.DEFAULT_ELEMENT_LOCAL_NAME:
                  if (authenticationStatement != null) {
                    String classValue = xmlStreamReader.getText();
                    classValue = classValue.trim();
                    AuthenticationContextClassRef authenticationContextClassRef =
                        new AuthenticationContextClassRef();
                    authenticationContextClassRef.setAuthnContextClassRef(classValue);
                    AuthenticationContext authenticationContext = new AuthenticationContext();
                    authenticationContext.setAuthnContextClassRef(authenticationContextClassRef);
                    authenticationStatement.setAuthnContext(authenticationContext);
                  }
                  break;
                case Attribute.DEFAULT_ELEMENT_LOCAL_NAME:
                  attribute = new Attr();
                  if (attributeStatement != null) {
                    attributeStatement.addAttribute(attribute);
                  }
                  attrs = xmlStreamReader.getAttributeCount();
                  for (int i = 0; i < attrs; i++) {
                    String name = xmlStreamReader.getAttributeLocalName(i);
                    String value = xmlStreamReader.getAttributeValue(i);
                    if (Attribute.NAME_ATTTRIB_NAME.equals(name)) {
                      attribute.setName(value);
                    } else if (Attribute.NAME_FORMAT_ATTRIB_NAME.equals(name)) {
                      attribute.setNameFormat(value);
                    }
                  }
                  break;
                case AttributeValue.DEFAULT_ELEMENT_LOCAL_NAME:
                  XSString xsString = new XMLString();
                  xsString.setValue(xmlStreamReader.getElementText());
                  if (attribute != null) {
                    attribute.addAttributeValue(xsString);
                  }
                  break;
                case Issuer.DEFAULT_ELEMENT_LOCAL_NAME:
                  issuer = xmlStreamReader.getElementText();
                  break;
                case Conditions.DEFAULT_ELEMENT_LOCAL_NAME:
                  attrs = xmlStreamReader.getAttributeCount();
                  for (int i = 0; i < attrs; i++) {
                    String name = xmlStreamReader.getAttributeLocalName(i);
                    String value = xmlStreamReader.getAttributeValue(i);
                    if (Conditions.NOT_BEFORE_ATTRIB_NAME.equals(name)) {
                      notBefore = DatatypeConverter.parseDateTime(value).getTime();
                    } else if (Conditions.NOT_ON_OR_AFTER_ATTRIB_NAME.equals(name)) {
                      notOnOrAfter = DatatypeConverter.parseDateTime(value).getTime();
                    }
                  }
                  break;
              }
              break;
            }
          case XMLStreamConstants.END_ELEMENT:
            {
              String localName = xmlStreamReader.getLocalName();
              switch (localName) {
                case AttributeStatement.DEFAULT_ELEMENT_LOCAL_NAME:
                  attributeStatement = null;
                  break;
                case Attribute.DEFAULT_ELEMENT_LOCAL_NAME:
                  attribute = null;
                  break;
              }
              break;
            }
        }
      }
    } catch (XMLStreamException e) {
      LOGGER.error("Unable to parse security token.", e);
    } finally {
      try {
        xmlStreamReader.close();
      } catch (XMLStreamException ignore) {
        // ignore
      }
    }
  }