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

/*
   item-at function: returns the nth item in a sequence
*/

#ifndef _FUNCTIONINDEXOF_HPP
#define _FUNCTIONINDEXOF_HPP

#include <pathan/functionAPI/ConstantFoldingFunction.hpp>
#include <pathan/Sequence.hpp>

class XPath2MemoryManager;
class AnyAtomicType;
class Collation;

/** index-of function*/
class PATHAN_EXPORT FunctionIndexOf : public ConstantFoldingFunction
{
public:
  static const XMLCh name[];

  FunctionIndexOf(const VectorOfDataItems &args, XPath2MemoryManager* memMgr);
  
  /** Returns a sequence of indices where the item occurs in the sequence */
  Sequence indexOf(Sequence &list, const Item* item, Collation* collation, const DynamicContext* context) const;
  Sequence simpleIndexOf(Sequence &list, const AnyAtomicType* atom, const DynamicContext* context) const;
  Sequence stringIndexOf(Sequence &list, const AnyAtomicType* atom, Collation* collation, const DynamicContext* context) const;
  Sequence collapseTreeInternal(DynamicContext* context, int flags=0) const;
};

#endif // _FUNCTIONINDEXOF_HPP