src/com/interrupt/bookkeeping/workflow/StateManager.java

   1
   2 package com.interrupt.bookkeeping.workflow;
   3
   4 import com.interrupt.bob.base.IBob;
   5 import com.interrupt.bookkeeping.cc.bkell.Bkell;
   6 import com.interrupt.bookkeeping.exception.WorkflowException;
   7 import com.interrupt.bookkeeping.util.Util;
   8
   9 import org.apache.log4j.Logger;
  10 import org.xml.sax.helpers.AttributesImpl;
  11
  12
  13 public class StateManager {
  14
  15         private Logger logger = Logger.getLogger(StateManager.class);
  16         public StateManager() {}
  17
  18     /* transition to the appripriate state
  19      * if state is 1) null or 2) non of these, it goes to the 'open' state
  20      */
  21     public void transition(IBob ibob, String destination) throws WorkflowException {
  22
  23         // getting the 'state' value of the IBob object
  24         String sstate = (ibob.getAttributes()).getValue("state");
  25         String estate = null;
  26
  27         if(sstate == null) {
  28             //throw new WorkflowException("Cannot find attribute 'state'");
  29             return;
  30         }
  31         if(destination == null) {
  32             throw new WorkflowException("destination is NULL");
  33         }
  34         logger.debug("-- transition > Class["+ibob.getClass()+"] > sstate["+sstate+"] > destination["+destination+"]");
  35
  36         // transition
  37         if(sstate.equals(Util.OPEN_STATE) &&
  38             destination.equals(Util.CLOSED_STATE)) {
  39
  40             estate = Util.CLOSED_STATE;
  41         }
  42         else if(sstate.equals(Util.CLOSED_STATE) &&
  43                 destination.equals(Util.REVERSED_STATE)) {
  44
  45             estate = Util.REVERSED_STATE;
  46         }
  47         else if(sstate.equals(Util.CLOSED_STATE) &&
  48                 destination.equals(Util.REVERSE_CLOSED_STATE)) {
  49
  50             estate = Util.REVERSE_CLOSED_STATE;
  51         }
  52         else if(sstate.equals(Util.CLOSED_STATE) &&
  53                 destination.equals(Util.REMOVED_STATE)) {
  54
  55             estate = Util.REMOVED_STATE;
  56         }
  57         else if(sstate.equals(Util.REVERSED_STATE)) {
  58             // if this has been removed, do nothing
  59             estate = Util.REVERSED_STATE;
  60         }
  61         else if(sstate.equals(Util.REMOVED_STATE)) {
  62             // if this has been removed, do nothing
  63             estate = Util.REMOVED_STATE;
  64         }
  65         else {
  66             estate = Util.OPEN_STATE;
  67         }
  68
  69         int index = (ibob.getAttributes()).getIndex("state");
  70         ((AttributesImpl)ibob.getAttributes()).setValue(index,estate);
  71     }
  72 }
  73
  74