/*
    * Copyright 2018 the original author or authors.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.openehealth.ipf.commons.ihe.xua;
  
  import org.opensaml.core.xml.XMLObject;
  import org.opensaml.core.xml.io.UnmarshallingException;
  import org.opensaml.saml.saml2.core.AttributeStatement;
  import org.opensaml.saml.saml2.core.SubjectConfirmation;
  import org.opensaml.saml.saml2.core.impl.AttributeStatementBuilder;
  import org.opensaml.saml.saml2.core.impl.AttributeStatementUnmarshaller;
  
  import java.util.List;
  
  /**
   * A dirty workaround to convert an "unknown XML object" contained in a
   * {@link SubjectConfirmation} into a proper {@link AttributeStatement} instance.
   *
   * @author Dmytro Rud
   */
  public class AttributeStatementExtractor extends AttributeStatementUnmarshaller {
  
      public AttributeStatement extractAttributeStatement(SubjectConfirmation subjectConfirmation) {
          AttributeStatement attributeStatement = new AttributeStatementBuilder().buildObject();
          List<XMLObject> xmlObjectList = subjectConfirmation.getSubjectConfirmationData().getUnknownXMLObjects(AttributeStatement.DEFAULT_ELEMENT_NAME);
          for (XMLObject xmlObject : xmlObjectList) {
              for (XMLObject child : xmlObject.getOrderedChildren()) {
                  try {
                      child.detach();
                      processChildElement(attributeStatement, child);
                  } catch (UnmarshallingException e) {
                      // do nothing
                  }
              }
          }
          return attributeStatement;
      }
  
  }