/*
    * Copyright 2001-2004 The Apache Software Foundation.
    * 
    * 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.apache.juddi.function;
  
  import java.util.Vector;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.juddi.datastore.DataStore;
  import org.apache.juddi.datastore.DataStoreFactory;
  import org.apache.juddi.datatype.RegistryObject;
  import org.apache.juddi.datatype.publisher.Publisher;
  import org.apache.juddi.datatype.request.AuthInfo;
  import org.apache.juddi.datatype.request.DeleteService;
  import org.apache.juddi.datatype.response.DispositionReport;
  import org.apache.juddi.datatype.response.Result;
  import org.apache.juddi.error.InvalidKeyPassedException;
  import org.apache.juddi.error.RegistryException;
  import org.apache.juddi.error.UserMismatchException;
  import org.apache.juddi.registry.RegistryEngine;
  import org.apache.juddi.util.Config;
  
  /***
   * @author Steve Viens (sviens@apache.org)
   */
  public class DeleteServiceFunction extends AbstractFunction
  {
    // private reference to jUDDI Logger
    private static Log log = LogFactory.getLog(DeleteServiceFunction.class);
  
    /***
     *
     */
    public DeleteServiceFunction(RegistryEngine registry)
    {
      super(registry);
    }
  
    /***
     *
     */
    public RegistryObject execute(RegistryObject regObject)
      throws RegistryException
    {
      // extract individual parameters
      DeleteService request = (DeleteService)regObject;
      String generic = request.getGeneric();
      AuthInfo authInfo = request.getAuthInfo();
      Vector serviceKeyVector = request.getServiceKeyVector();
  
      // aquire a jUDDI datastore instance
      DataStore dataStore = DataStoreFactory.getDataStore();
  
      try
      {
        dataStore.beginTrans();
  
        // validate authentication parameters
        Publisher publisher = getPublisher(authInfo,dataStore);
        String publisherID = publisher.getPublisherID();
  
        // validate request parameters
        for (int i=0; i<serviceKeyVector.size(); i++)
        {
          // grab the next key from the vector
          String serviceKey = (String)serviceKeyVector.elementAt(i);
  
          // check that this business server really exists.
          // If not then throw an InvalidKeyPassedException.
          if ((serviceKey == null) || (serviceKey.length() == 0) ||
              (!dataStore.isValidServiceKey(serviceKey)))
            throw new InvalidKeyPassedException("delete_service: "+
                "serviceKey="+serviceKey);
  
          // check to make sure that 'authorizedName' controls the
          // business entity that this server belongs to. If not
          // then throw a UserMismatchException.
          if (!dataStore.isServicePublisher(serviceKey,publisherID))
            throw new UserMismatchException("delete_service: "+
                "userID="+publisherID+", "+
                "serviceKey="+serviceKey);
        }
  
        // delete the BusinessServices
        for (int i=0; i<serviceKeyVector.size(); i++)
        {
         String serviceKey = (String)serviceKeyVector.elementAt(i);
         dataStore.deleteService(serviceKey);
 
         log.info("Publisher '"+publisherID+"' deleted BusinessService with key: "+serviceKey);
       }
 
       dataStore.commit();
     }
     catch(InvalidKeyPassedException keyex)
     {
       try { dataStore.rollback(); } catch(Exception e) { }
       log.info(keyex.getMessage());
       throw (RegistryException)keyex;
     }
     catch(UserMismatchException umex)
     {
       try { dataStore.rollback(); } catch(Exception e) { }
       log.info(umex.getMessage());
       throw (RegistryException)umex;
     }
     catch(RegistryException regex)
     {
       try { dataStore.rollback(); } catch(Exception e) { }
       log.error(regex);
       throw (RegistryException)regex;
     }
     catch(Exception ex)
     {
       try { dataStore.rollback(); } catch(Exception e) { }
       log.error(ex);
       throw new RegistryException(ex);
     }
     finally
     {
       if (dataStore != null)
         dataStore.release();
     }
 
     // We didn't encounter any problems so let's create an
     // E_SUCCESS Result, embed it in a DispositionReport
     // and return it.
     Result result = new Result(Result.E_SUCCESS);
     result.setErrCode(Result.lookupErrCode(Result.E_SUCCESS));    
     DispositionReport dispRpt = new DispositionReport();
     dispRpt.setGeneric(generic);
     dispRpt.setOperator(Config.getOperator());
     dispRpt.addResult(result);
     
     return dispRpt;
   }
 
 
   /****************************************************************************/
   /****************************** TEST DRIVER *********************************/
   /****************************************************************************/
 
 
   public static void main(String[] args)
   {
     // initialize the registry
     RegistryEngine reg = new RegistryEngine();
     reg.init();
 
     try
     {
       // create a request
       DeleteService request = new DeleteService();
 
       // invoke the server
       DispositionReport response = (DispositionReport)(new DeleteServiceFunction(reg).execute(request));
       System.out.println("errno: "+response.toString());
     }
     catch (Exception ex)
     {
       // write execption to the console
       ex.printStackTrace();
     }
     finally
     {
       // destroy the registry
       reg.dispose();
     }
   }
 }