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

#ifndef _ATDATEORDERIVEDIMPL_HPP
#define _ATDATEORDERIVEDIMPL_HPP

#include <xercesc/util/XMLString.hpp>
#include <pathan/ATDateOrDerived.hpp>
#include <pathan/internal/m_apm.h>



class Timezone;
class ATDecimalOrDerived;
class ATDurationOrDerived;
class XPath2MemoryManager;
class DynamicContext;

class PATHAN_EXPORT ATDateOrDerivedImpl : public ATDateOrDerived 
{

public:

  /* constructor */
  ATDateOrDerivedImpl(const XMLCh* typeURI, const XMLCh* typeName, const XMLCh* value, XPath2MemoryManager* memMgr, const DynamicContext* context);

  /* Get the name of the primitive type (basic type) of this type
   * (ie "decimal" for xs:decimal) */
  virtual const XMLCh* getPrimitiveTypeName() const;

  /* Get the namespace URI for this type */
  virtual const XMLCh* getTypeURI() const;

  /* Get the name of this type  (ie "integer" for xs:integer) */
  virtual const XMLCh* getTypeName() const;

  /* returns the XMLCh* (canonical) representation of this type */
  virtual const XMLCh* asString(const DynamicContext* context) const;

  /** Releases the memory used by this Item */
  virtual void release() const;

  /* returns true if the two objects represent the same date,
   * false otherwise */
  virtual bool equals(const AnyAtomicType* target, const DynamicContext* context) const;

  /**
   * Returns true if and only if this date is greater than the given date. 
   * The order relation on date values is the order relation on their 
   * starting instants.
   */
  virtual bool greaterThan(const ATDateOrDerived* date, const DynamicContext* context) const;

  /**
   * Returns true if and only if this date is less than the given date. 
   * The order relation on date values is the order relation on their
   * starting instants.
   */
  virtual bool lessThan(const ATDateOrDerived* date, const DynamicContext* context) const;

  /** 
   * Returns an integer representing the year component  of this object
   */
  virtual const ATDecimalOrDerived* getYears() const;

  /** 
   * Returns an integer representing the month component  of this object
   */
  virtual const ATDecimalOrDerived* getMonths() const;

  /** 
   * Returns an integer representing the day component  of this object
   */
  virtual const ATDecimalOrDerived* getDays() const;
  virtual const ATDateOrDerived* normalize(const DynamicContext* context) const;
  
  /**
   * Returns the timezone associated with this object, or
   * null, if the timezone is not set
   */
  virtual const Timezone* getTimezone() const;
  
  /**
   * Returns true if the timezone is defined for this object, false otherwise.
   */
  virtual bool hasTimezone() const;

  /**
   * Setter for timezone.  Overrides the current timezone. (Not to be 
   * confused with addTimezone().
   */
  virtual const ATDateOrDerived* setTimezone(const Timezone* timezone, const DynamicContext* context) const;

  /**
   * Returns an ATDateOrDerived with a timezone added to it
   */
  virtual const ATDateOrDerived* addTimezone(const ATDurationOrDerived* timezone, const DynamicContext* context) const;
  
  /**
   * Returns a date with the given yearMonthDuration added to it
   */
  virtual const ATDateOrDerived* addYearMonthDuration(const ATDurationOrDerived* yearMonth,  const DynamicContext* context) const;

  /**
   * Returns a date with the given dayTimeDuration added to it
   */
  virtual const ATDateOrDerived* addDayTimeDuration(const ATDurationOrDerived* dayTime, const DynamicContext* context) const;
  
  /**
   * Returns a date with the given number of days added to it
   */
  virtual const ATDateOrDerived* addDays(const ATDecimalOrDerived* days, const DynamicContext* context) const;

  /**
   * Returns a date with the given yearMonthDuration subtracted from it
   */
  virtual const ATDateOrDerived* subtractYearMonthDuration(const ATDurationOrDerived* yearMonth, const DynamicContext* context) const;

  /**
   * Returns a date with the given dayTimeDuration subtracted from it
   */
  virtual const ATDateOrDerived* subtractDayTimeDuration(const ATDurationOrDerived* dayTime, const DynamicContext* context) const;

  /**
   * Returns a date with the given number of days subtracted from it
   */
  virtual const ATDateOrDerived* subtractDays(const ATDecimalOrDerived* days, const DynamicContext* context) const;

  /**
   * Returns a dayTimeDuration corresponding to the difference between this
   * and the given ATDateOrDerived*
   */
  virtual const ATDurationOrDerived* subtractDate(const ATDateOrDerived* date, const DynamicContext* context) const;

  /* Get the primitive index associated with this type */
  static AnyAtomicType::AtomicObjectType getTypeIndex(); 
  
  /* Get the primitive type name */
  static const XMLCh* getPrimitiveName();
  
  /* Get the primitive index associated with this type */
  virtual AnyAtomicType::AtomicObjectType getPrimitiveTypeIndex() const;
  
protected:
  
  /* If possible, cast this type to the target type */
  virtual const AnyAtomicType* castAsInternal(const XMLCh* targetURI, const XMLCh* targetType, const DynamicContext* context) const;

private:
  // private constructor for use with clone()
  ATDateOrDerivedImpl(const XMLCh* typeURI, const XMLCh* typeName, const ATDecimalOrDerived* YY, 
                      const ATDecimalOrDerived* MM, const ATDecimalOrDerived* DD, 
                      const Timezone* timezone, bool hasTimezone,  XPath2MemoryManager* memMgr);

  void setDate(const XMLCh* const date, const DynamicContext* context);

  const ATDateOrDerived* addDays(MAPM days, const DynamicContext* context) const;

  const ATDateOrDerived* subtractDays(MAPM days, const DynamicContext* context) const;

  const ATDateOrDerived* addYearMonthDuration(MAPM years, MAPM months, const DynamicContext* context) const;

  /* returns the XMLCh* (lexical := prefix:localname) representation of this type */
  const XMLCh* asLexicalString(const DynamicContext* context) const;

  //////////////////////////////////////
  // Horrible Hack to make Dates      //
  // work for now. Loss of Precision! //
  //////////////////////////////////////
  int asInt(MAPM num) const;
  
  /*The value of this date*/
  const ATDecimalOrDerived* _YY;  // year
  const ATDecimalOrDerived* _MM;  // month
  const ATDecimalOrDerived* _DD;  // day
  
  /* the timezone associated with this ATDateOrDerived */
  const Timezone* _timezone;
  
  /* true if the timezone is defined */
  bool _hasTimezone;

  /* the name of this type */
  const XMLCh* _typeName;

  /* the uri of this type */
  const XMLCh* _typeURI;
 
};

#endif // _ATDATEORDERIVEDIMPL_HPP