#include "../../config/pathan_config.h"
/*
 * Copyright (c) 2001, DecisionSoft Limited All rights reserved.
 * Please see LICENSE.TXT for more information.
 */

#include <pathan/functions/FunctionYearFromDate.hpp>
#include <pathan/DynamicContext.hpp>
#include <pathan/Item.hpp>
#include <pathan/AnyAtomicType.hpp>
#include <pathan/ATDecimalOrDerived.hpp>
#include <pathan/ATDateOrDerived.hpp>

const XMLCh FunctionYearFromDate::name[] = {
XERCES_CPP_NAMESPACE_QUALIFIER chLatin_y, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_e, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_a, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_r, XERCES_CPP_NAMESPACE_QUALIFIER chDash, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_f, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_r, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_o, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_m, XERCES_CPP_NAMESPACE_QUALIFIER chDash, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_d, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_a, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_t, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_e, XERCES_CPP_NAMESPACE_QUALIFIER chNull };

/*
 * fn:year-from-date($arg as xs:date?) as xs:integer?
 */

FunctionYearFromDate::FunctionYearFromDate(const VectorOfDataItems &args, XPath2MemoryManager* memMgr)
  : DataItemFunction(name,1, 1, "date?", args, memMgr)
{
}

DataItem* FunctionYearFromDate::staticResolution(StaticContext *context, StaticResolutionContext *src)
{
  return resolveDataItemsForDateOrTime(_args, context, src, true);
}

Sequence FunctionYearFromDate::collapseTreeInternal(DynamicContext* context, int flags) const
{
	XPath2MemoryManager* memMgr = context->getMemoryManager();

  Sequence arg=getParamNumber(1,context);
  if(arg.isEmpty())
    return Sequence(memMgr);

  
  const ATDateOrDerived* date = (const ATDateOrDerived*)arg.first();
  return Sequence(date->normalize(context)->getYears(), memMgr);
}