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

#include <pathan/operators/NotEquals.hpp>
#include <pathan/operators/Equals.hpp>
#include <pathan/ATBooleanOrDerived.hpp>
#include <pathan/internal/factory/DatatypeFactory.hpp>
#include <pathan/DynamicContext.hpp>

/*static*/ const XMLCh NotEquals::name[]={ XERCES_CPP_NAMESPACE_QUALIFIER chLatin_n, XERCES_CPP_NAMESPACE_QUALIFIER chLatin_e, XERCES_CPP_NAMESPACE_QUALIFIER chNull };

NotEquals::NotEquals(const VectorOfDataItems &args, XPath2MemoryManager* memMgr)
  : DataItemOperator(name, args, memMgr)
{
}

/*static*/ bool NotEquals::not_equals(const Item* arg1, const Item* arg2, DynamicContext* context)
{
  // define "ne" as "!eq"
  return !Equals::equals(arg1,arg2,context);
}

Sequence NotEquals::collapseTreeInternal(DynamicContext* context, int flags) const
{
  XPath2MemoryManager* memMgr = context->getMemoryManager();
  Sequence newArgs = getComparisonOperatorArguments(context);
  if(newArgs.getLength() < 2)
    return Sequence(memMgr);
  bool result = not_equals(newArgs.first(), newArgs.second(), context);
  return Sequence(DatatypeFactory::POD2AT::createBoolean(memMgr, result, context), memMgr);
}