text: /*
   * Copyright (c) 2001-2008
   *     DecisionSoft Limited. All rights reserved.
   * Copyright (c) 2004-2008
   *     Oracle. All rights reserved.
   *
   * 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.
   *
   * $Id$
   */
  
  #include "../config/xqilla_config.h"
  #include <assert.h>
  #include <xqilla/operators/Minus.hpp>
  #include <xqilla/operators/Plus.hpp>
  #include <xqilla/items/ATDurationOrDerived.hpp>
  #include <xqilla/items/ATDateTimeOrDerived.hpp>
  #include <xqilla/items/ATDateOrDerived.hpp>
  #include <xqilla/items/ATTimeOrDerived.hpp>
  #include <xqilla/items/Numeric.hpp>
  #include <xqilla/exceptions/XPath2ErrorException.hpp>
  #include <xqilla/context/DynamicContext.hpp>
  
  XERCES_CPP_NAMESPACE_USE;
  
  const XMLCh Minus::name[]={ chLatin_m, chLatin_i, chLatin_n, chLatin_u, chLatin_s, chNull };
  
  Minus::Minus(const VectorOfASTNodes &args, XPath2MemoryManager* memMgr)
    : ArithmeticOperator(name, args, memMgr)
  {
  }
  
  void Minus::calculateStaticType()
  {
    const StaticType &arg0 = _args[0]->getStaticAnalysis().getStaticType();
    const StaticType &arg1 = _args[1]->getStaticAnalysis().getStaticType();
  
    calculateStaticTypeForNumerics(arg0, arg1);
  
    // Subtracting a duration from a date, dateTime, time, or duration
    if(arg1.containsType(StaticType::DAY_TIME_DURATION_TYPE)) {
      _src.getStaticType() |= arg0 & (StaticType::DATE_TYPE|StaticType::DATE_TIME_TYPE|StaticType::TIME_TYPE|
                                      StaticType::DAY_TIME_DURATION_TYPE);
    }
    if(arg1.containsType(StaticType::YEAR_MONTH_DURATION_TYPE)) {
      _src.getStaticType() |= arg0 & (StaticType::DATE_TYPE|StaticType::DATE_TIME_TYPE|StaticType::YEAR_MONTH_DURATION_TYPE);
    }
  
    // Subtracting date, dateTime and time
    if(arg0.containsType(StaticType::DATE_TYPE) && arg1.containsType(StaticType::DATE_TYPE)) {
      _src.getStaticType() |= StaticType::DAY_TIME_DURATION_TYPE;
    }
    if(arg0.containsType(StaticType::DATE_TIME_TYPE) && arg1.containsType(StaticType::DATE_TIME_TYPE)) {
      _src.getStaticType() |= StaticType::DAY_TIME_DURATION_TYPE;
    }
    if(arg0.containsType(StaticType::TIME_TYPE) && arg1.containsType(StaticType::TIME_TYPE)) {
      _src.getStaticType() |= StaticType::DAY_TIME_DURATION_TYPE;
    }
  }
  
  Item::Ptr Minus::execute(const AnyAtomicType::Ptr &atom1, const AnyAtomicType::Ptr &atom2, DynamicContext *context) const
  {
    if(atom1 == NULLRCP || atom2 == NULLRCP) return 0;
  
    if(atom1->isNumericValue()) {
      if(atom2->isNumericValue()) {
        return ((Numeric*)atom1.get())->subtract((const Numeric::Ptr )atom2, context);
      }
      else {
        XQThrow(XPath2ErrorException,X("Minus::createSequence"), X("An attempt to subtract a non numeric type from a numeric type has occurred [err:XPTY0004]"));
      }
    }
    
    switch(atom1->getPrimitiveTypeIndex()) {
    case AnyAtomicType::DATE : {
      switch(atom2->getPrimitiveTypeIndex()) {
      case AnyAtomicType::DAY_TIME_DURATION: {
        return ((ATDateOrDerived*)atom1.get())->subtractDayTimeDuration((const ATDurationOrDerived *)atom2.get(), context);
      }
      case AnyAtomicType::YEAR_MONTH_DURATION: {
        return ((ATDateOrDerived*)atom1.get())->subtractYearMonthDuration((const ATDurationOrDerived *)atom2.get(), context);
      }
      case AnyAtomicType::DATE: {
        return ((ATDateOrDerived*)atom1.get())->subtractDate((const ATDateOrDerived *)atom2.get(), context);
      }
      default: {
        XQThrow(XPath2ErrorException,X("Minus::createSequence"), X("An invalid attempt to subtract from xs:date type has occurred [err:XPTY0004]"));
      }
      }
    }
    case AnyAtomicType::TIME : {
      switch(atom2->getPrimitiveTypeIndex()) {
      case AnyAtomicType::DAY_TIME_DURATION : {
        return ((ATTimeOrDerived*)atom1.get())->subtractDayTimeDuration((const ATDurationOrDerived *)atom2.get(), context );
      }
      case AnyAtomicType::TIME : {
        return ((ATTimeOrDerived*)atom1.get())->subtractTime((const ATTimeOrDerived *)atom2.get(), context);
      }
      default: {
        XQThrow(XPath2ErrorException,X("Minus::createSequence"), X("An invalid attempt to subtract from xs:time type has occurred [err:XPTY0004]"));
      }
      }
    }
    case AnyAtomicType::DATE_TIME : {
      switch(atom2->getPrimitiveTypeIndex()) {
      case AnyAtomicType::DAY_TIME_DURATION: {
        return ((ATDateTimeOrDerived*)atom1.get())->subtractDayTimeDuration((const ATDurationOrDerived*)atom2.get(), context);
      }
      case AnyAtomicType::YEAR_MONTH_DURATION: {
        return ((ATDateTimeOrDerived*)atom1.get())->subtractYearMonthDuration((const ATDurationOrDerived*)atom2.get(), context);
      }
      case AnyAtomicType::DATE_TIME : {
        return ((ATDateTimeOrDerived*)atom1.get())->subtractDateTimeAsDayTimeDuration((const ATDateTimeOrDerived::Ptr )atom2, context);
      }
      default: {
        XQThrow(XPath2ErrorException,X("Minus::createSequence"), X("An invalid attempt to subtract from xs:dateTime type has occurred [err:XPTY0004]"));
      }
      }
    }
    case AnyAtomicType::DAY_TIME_DURATION: {
      switch(atom2->getPrimitiveTypeIndex()) {
      case AnyAtomicType::DAY_TIME_DURATION: {
        return ((ATDurationOrDerived*)atom1.get())->subtract((const ATDurationOrDerived *)atom2.get(), context);
      }
      default: {
        XQThrow(XPath2ErrorException,X("Minus::createSequence"), X("An invalid attempt to subtract from xdt:dayTimeDuration type has occurred [err:XPTY0004]"));
      }
      }
    }
    case AnyAtomicType::YEAR_MONTH_DURATION: {
      switch(atom2->getPrimitiveTypeIndex()) {
      case AnyAtomicType::YEAR_MONTH_DURATION: {
        return ((ATDurationOrDerived*)atom1.get())->subtract((const ATDurationOrDerived *)atom2.get(), context);
      }
      default: {
        XQThrow(XPath2ErrorException,X("Minus::createSequence"), X("An invalid attempt to subtract from xdt:yearMonthDuration type has occurred [err:XPTY0004]"));
      }
      }
    }
    default: {
      XQThrow(XPath2ErrorException,X("Minus::createSequence"), X("The operator subtract ('-') has been called on invalid operand types [err:XPTY0004]"));
    }
    }
  }
  
  