/*
 * Copyright (c) 2001, DecisionSoft Limited All rights reserved.
 * Please see LICENSE.TXT for more information.
 */

/*
  If function
*/

#ifndef _DATAITEMIF_HPP
#define _DATAITEMIF_HPP

#include <pathan/Pathan.hpp>

#include <pathan/dataItem/DataItemImpl.hpp>

/** If function. */
class PATHAN_EXPORT DataItemIf : public DataItemImpl
{
public:
  DataItemIf(DataItem* test, DataItem* whenTrue, DataItem* whenFalse, XPath2MemoryManager* memMgr);
  
  /** tests first argument, on truth evaluate 2nd arguement, on falsehood evaluate 3rd argument **/
  Sequence collapseTreeInternal(DynamicContext* context, int flags=0) const;

  /**
   *  Called during static analysis to determine if statically correct.  If
   *  not an appropriate error is thrown.
   */
  virtual DataItem* staticResolution(StaticContext *context, StaticResolutionContext *src);

  const DataItem *getTest() const;
  const DataItem *getWhenTrue() const;
  const DataItem *getWhenFalse() const;

  void setTest(DataItem *item);
  void setWhenTrue(DataItem *item);
  void setWhenFalse(DataItem *item);

protected:
  DataItem* _test,* _whenTrue,* _whenFalse;
};

#endif // _DATAITEMIF_HPP