//*****************************************************************************
//*                                                                           *
//* "This sample program is provided AS IS and may be used, executed, copied  *
//* and modified without royalty payment by customer                          *
//* (a) for its own instruction and study,                                    *
//* (b) in order to develop applications designed to run with an              *
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//*     customer's own products."                                             *
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//* Product 5655-FLW,                                                         *
//* (C) COPYRIGHT International Business Machines Corp., 2006                 *
//* All Rights Reserved * Licensed Materials - Property of IBM                *
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//* This material contains programming source code for your consideration.    *
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//*****************************************************************************


/*
* This sample shows how to cancel the claim of a staff activity.
* You have to be process administrator to cancel the claim of another user.
*    
* In this sample a user claims a staff activity and then calls cancelClaim()
* to cancel the claim.  
*
*/


import com.ibm.bpe.api.*;     
import commonj.sdo.DataObject;



public class CancelClaim
{

  public static void main(String[] args)
  {

      try
      {

          // initialize context and access the remote interface for the 
          // BusinessFlowManager bean
          BusinessFlowManager bfm = ApiHelper.initializeBFM();

          String selectClause = "DISTINCT  ACTIVITY.AIID" ;
          String whereClause = null;  
          String orderClause = null;

          // List the activities of the OrderApprovalProcess
          // that are in state ready and for which the current user is a potential owner  
          // in order to work on (claim) it 
          whereClause = "ACTIVITY.STATE = ACTIVITY.STATE.STATE_READY AND " +
                        "ACTIVITY.KIND  = ACTIVITY.KIND.KIND_STAFF   AND " +
                        "WORK_ITEM.REASON = WORK_ITEM.REASON.REASON_POTENTIAL_OWNER AND " +
                        "PROCESS_INSTANCE.STATE = PROCESS_INSTANCE.STATE.STATE_RUNNING AND " +
                        "PROCESS_TEMPLATE.NAME = 'OrderApprovalProcess' ";

          QueryResultSet result = bfm.query( selectClause, whereClause, orderClause, null, null );
          System.out.println( "\n > query(), result size: " + result.size());
          if ( result.size() == 0 )
          {
              System.out.println("\n > successfully processed.\n" );
              System.exit(0);
          }

          AIID aiid = null;
          result.first();
          aiid = (AIID)result.getOID(1);
          MyTrace.trace( aiid, "activity, retrieved calling query()", bfm );

          // in order to work on the activity you have to claim it
          ClientObjectWrapper input = bfm.claim(aiid);
          MyTrace.trace( aiid, "activity claimed", bfm );

          if (input.getObject() != null && input.getObject() instanceof DataObject)
          {
              DataObject inputMessage = (DataObject)input.getObject();
              MyTrace.trace(inputMessage, "inputMessage");
          }

          // The process administrator can cancel this claim that another user can 
          // start to work on this activity. 
          bfm.cancelClaim( aiid );
          MyTrace.trace( aiid, "activity claim canceled", bfm );


          System.out.println(" > successfully processed." );
          System.exit(0);
      }

      catch ( com.ibm.bpe.api.ProcessException xcpt)
      {
          System.out.println(  xcpt );
      } catch (java.lang.Exception xcpt )
      {
          System.out.println( xcpt );
      } catch (Throwable xcpt )
      {
          System.out.println( xcpt );
      } finally
      {
          System.exit(0);
      }
  }

}