/*
 * Copyright (c) 2002, 2003, 2004 Active Endpoints, Inc.
 *
 * This program is licensed under the terms of the GNU General Public License
 * Version 2 (the "License") as published by the Free Software Foundation, and
 * the ActiveBPEL Licensing Policies (the "Policies").  A copy of the License
 * and the Policies were distributed with this program.
 *
 * The License is available at:
 * http://www.gnu.org/copyleft/gpl.html
 *
 * The Policies are available at:
 * http://www.activebpel.org/licensing/index.html
 *
 * Unless required by applicable law or agreed to in writing, this program is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License and the Policies for
 * specific language governing the use of this program.
 */
package org.activebpel.demo.client;
import org.activebpel.demo.Constants;
import org.activebpel.demo.loanProcessFault;
import org.activebpel.demo.util.RuntimeParams;
import java.math.BigInteger;
import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import org.apache.axis.AxisFault;
import javax.xml.rpc.ParameterMode;

/**
 * A loan approval client that calls a BPEL Web Service directly.
 *
 * @author Jim Menard, <a href="mailto:jimm@activebpel.org">jimm@activebpel.org</a>
 *
 * @Revised by Dr. Haiping Xu
 */
public class BPELTestClient {

   private RuntimeParams rp;
   private String firstName, lastName;
   private BigInteger amount;

   /**
    * Create a test client and run it, printing out the JUnit-like results.
    */
   public static void main(String[] args) {
      try {
	      BPELTestClient client = new BPELTestClient();
	      String result = client.run();
	      System.out.println("Congratulations! Dr. " + client.firstName + " " + client.lastName +
	      "! The answer to your loan request of $" + client.amount + " is \"" + result + "\".");
	  }
      catch (Exception e) {
	      e.printStackTrace();
      }
   }

   /**
    * Constructor. Reads runtime parameters from the config file.
    */
   public BPELTestClient() throws Exception {
      rp = new RuntimeParams();
   }

   /**
    * Creates a SOAP RPC call, calls the BPEL process Web service, and returns
    * the result returned from the server. If an AxisFault is caught and it
    * contains the magic fault string, we return that string instead of
    * re-throwing the fault.
    *
    * @return the string returned by the BPEL process or
    * <code>Constants.MAGIC_FAULT_STRING</code> if an <code>AxisFault</code>
    * containing that string is received
    */
   public String run() throws Exception {
      // Call BPEL process Web service using RPC
      Call call = createCall();
      String result = null;

      try {
	      firstName = rp.getText("/rundata/client/firstName");
	      lastName = rp.getText("/rundata/client/name");
	      amount = new BigInteger(rp.getText("/rundata/client/amount"));
	      result = (String)call.invoke(new Object[] {firstName, lastName, amount});
      }
      catch (AxisFault af) {
	      if (loanProcessFault.hasMagicFaultErrorCode(af))
	          result = Constants.MAGIC_FAULT_STRING;
	  else
	      result = af.toString();
      }
      catch (Exception e) {
	      result = "unexpected exception seen: " + e.toString();
      }

      return result;
   }

   /**
    * Creates and returns an RPC SOAP call. The call's parameter values are taken
    * from the config file.
    *
    * @return an RPC SOAP call
    */
   protected Call createCall() throws Exception {
      Service service = new Service();
      Call call = (Call)service.createCall();

      String urlString = rp.getAttr("/rundata/client", "url");
      call.setTargetEndpointAddress(new java.net.URL(urlString));
      call.setOperationName(rp.getAttr("/rundata/client", "operation"));

      call.addParameter("firstName", org.apache.axis.Constants.XSD_STRING,
  		      ParameterMode.IN);
      call.addParameter("name", org.apache.axis.Constants.XSD_STRING,
		      ParameterMode.IN);
      call.addParameter("amount", org.apache.axis.Constants.XSD_INTEGER,
		      ParameterMode.IN);
      call.setReturnType(org.apache.axis.Constants.XSD_STRING);

      return call;
   }
}