/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.apache.chemistry.opencmis.client.bindings.spi.webservices;
  
  import java.io.StringWriter;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import javax.xml.namespace.QName;
  import javax.xml.transform.OutputKeys;
  import javax.xml.transform.Transformer;
  import javax.xml.transform.TransformerFactory;
  import javax.xml.transform.dom.DOMSource;
  import javax.xml.transform.stream.StreamResult;
  import javax.xml.ws.BindingProvider;
  import javax.xml.ws.Service;
  import javax.xml.ws.soap.MTOMFeature;
  
  import org.apache.chemistry.opencmis.client.bindings.impl.CmisBindingsHelper;
  import org.apache.chemistry.opencmis.commons.SessionParameter;
  import org.apache.chemistry.opencmis.commons.exceptions.CmisBaseException;
  import org.apache.chemistry.opencmis.commons.exceptions.CmisConnectionException;
  import org.apache.chemistry.opencmis.commons.exceptions.CmisRuntimeException;
  import org.apache.chemistry.opencmis.commons.impl.jaxb.ACLService;
  import org.apache.chemistry.opencmis.commons.impl.jaxb.DiscoveryService;
  import org.apache.chemistry.opencmis.commons.impl.jaxb.MultiFilingService;
  import org.apache.chemistry.opencmis.commons.impl.jaxb.NavigationService;
  import org.apache.chemistry.opencmis.commons.impl.jaxb.ObjectService;
  import org.apache.chemistry.opencmis.commons.impl.jaxb.PolicyService;
  import org.apache.chemistry.opencmis.commons.impl.jaxb.RelationshipService;
  import org.apache.chemistry.opencmis.commons.impl.jaxb.RepositoryService;
  import org.apache.chemistry.opencmis.commons.impl.jaxb.VersioningService;
  import org.apache.chemistry.opencmis.commons.spi.AuthenticationProvider;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.w3c.dom.Element;
  
  /**
   * Provides CMIS Web Services port objects for WebSphere. Handles authentication
   * headers.
   */
  public class WebSpherePortProvider extends AbstractPortProvider {
      private static final Log log = LogFactory.getLog(WebSpherePortProvider.class);
  
      /**
       * Creates a port object.
       */
      protected Object createPortObject(Service service) {
  
          if (log.isDebugEnabled()) {
              log.debug("Creating Web Service port object of " + (service == null ? "???" : service.getServiceName())
                      + "...");
          }
  
          Object portObject;
          try {
              if (service instanceof RepositoryService) {
                  portObject = ((RepositoryService) service).getRepositoryServicePort(new MTOMFeature());
              } else if (service instanceof NavigationService) {
                  portObject = ((NavigationService) service).getNavigationServicePort(new MTOMFeature());
              } else if (service instanceof ObjectService) {
                  portObject = ((ObjectService) service).getObjectServicePort(new MTOMFeature());
              } else if (service instanceof VersioningService) {
                  portObject = ((VersioningService) service).getVersioningServicePort(new MTOMFeature());
              } else if (service instanceof DiscoveryService) {
                  portObject = ((DiscoveryService) service).getDiscoveryServicePort(new MTOMFeature());
              } else if (service instanceof MultiFilingService) {
                  portObject = ((MultiFilingService) service).getMultiFilingServicePort(new MTOMFeature());
              } else if (service instanceof RelationshipService) {
                  portObject = ((RelationshipService) service).getRelationshipServicePort(new MTOMFeature());
              } else if (service instanceof PolicyService) {
                  portObject = ((PolicyService) service).getPolicyServicePort(new MTOMFeature());
              } else if (service instanceof ACLService) {
                  portObject = ((ACLService) service).getACLServicePort(new MTOMFeature());
              } else {
                  throw new CmisRuntimeException("Cannot find Web Services service object!");
              }
  
              // add SOAP and HTTP authentication headers
              AuthenticationProvider authProvider = CmisBindingsHelper.getAuthenticationProvider(getSession());
              Map<String, List<String>> httpHeaders = null;
             if (authProvider != null) {
                 // SOAP header
                 Element soapHeader = authProvider.getSOAPHeaders(portObject);
                 if (soapHeader != null) {
                     TransformerFactory transFactory = TransformerFactory.newInstance();
                     Transformer transformer = transFactory.newTransformer();
                     StringWriter headerXml = new StringWriter();
                     transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
                     transformer.transform(new DOMSource(soapHeader), new StreamResult(headerXml));
 
                     Map<QName, List<String>> header = new HashMap<QName, List<String>>();
                     header.put(new QName(soapHeader.getNamespaceURI(), soapHeader.getLocalName()),
                             Collections.singletonList(headerXml.toString()));
                     ((BindingProvider) portObject).getRequestContext().put("jaxws.binding.soap.headers.outbound",
                             header);
                 }
 
                 // HTTP header
                 httpHeaders = authProvider.getHTTPHeaders(service.getWSDLDocumentLocation().toString());
             }
 
             // set HTTP headers
             setHTTPHeaders(portObject, httpHeaders);
 
             // timeouts
             int connectTimeout = getSession().get(SessionParameter.CONNECT_TIMEOUT, -1);
             if (connectTimeout >= 0) {
                 ((BindingProvider) portObject).getRequestContext().put("connection_timeout", connectTimeout);
             }
 
             int readTimeout = getSession().get(SessionParameter.READ_TIMEOUT, -1);
             if (readTimeout >= 0) {
                 ((BindingProvider) portObject).getRequestContext().put("request_timeout", readTimeout);
             }
         } catch (CmisBaseException ce) {
             throw ce;
         } catch (Exception e) {
             throw new CmisConnectionException("Cannot initalize Web Services port object: " + e.getMessage(), e);
         }
 
         return portObject;
     }
 }