public static void writeWorkItem(MarshallerWriteContext context, WorkItem workItem)
      throws IOException {
    ObjectOutputStream stream = context.stream;
    stream.writeLong(workItem.getId());
    stream.writeLong(workItem.getProcessInstanceId());
    stream.writeUTF(workItem.getName());
    stream.writeInt(workItem.getState());

    // Work Item Parameters
    Map<String, Object> parameters = workItem.getParameters();
    Collection<Object> notNullValues = new ArrayList<Object>();
    for (Object value : parameters.values()) {
      if (value != null) {
        notNullValues.add(value);
      }
    }

    stream.writeInt(notNullValues.size());
    for (String key : parameters.keySet()) {
      Object object = parameters.get(key);
      if (object != null) {
        stream.writeUTF(key);

        ObjectMarshallingStrategy strategy =
            context.objectMarshallingStrategyStore.getStrategyObject(object);
        String strategyClassName = strategy.getClass().getName();
        stream.writeInt(-2); // backwards compatibility
        stream.writeUTF(strategyClassName);
        if (strategy.accept(object)) {
          strategy.write(stream, object);
        }
      }
    }
  }
 public WorkItemInfo(WorkItem workItem) {
   this.workItem = workItem;
   this.name = workItem.getName();
   this.creationDate = new Date();
   this.processInstanceId = workItem.getProcessInstanceId();
 }