/*
 * Copyright 2006-2008 The FLWOR 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.
 */
#pragma once
#ifndef ZORBA_API_SINGLETON_ITERATOR_H
#define ZORBA_API_SINGLETON_ITERATOR_H

#include <zorba/iterator.h>
#include "common/shared_types.h"


namespace zorba {

class DiagnosticHandler;

/*******************************************************************************
  Iterator used for iterating over a single item
********************************************************************************/
class API_SingletonIterator : public Iterator 
{
  friend class Unmarshaller;
  friend class Item;

protected:
  store::Item_t       theItem;
  DiagnosticHandler * theDiagnosticHandler;
  bool                theOwnDiagnosticHandler;
  bool                theIsOpen;
  bool                theIsDone;

public:
  API_SingletonIterator(const store::Item_t& item, DiagnosticHandler* handler);

  virtual ~API_SingletonIterator();

  virtual void open();

  virtual bool next(Item&);

  virtual void close();

  bool isOpen() const { return theIsOpen; }
};

} /* namespace zorba */

#endif
/* vim:set et sw=2 ts=2: */
