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/*
*******************************************************************************
* Copyright (C) 2007-2008, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
#ifndef TZTRANS_H
#define TZTRANS_H
/**
* \file
* \brief C++ API: Time zone transition
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/uobject.h"
U_NAMESPACE_BEGIN
// Forward declaration
class TimeZoneRule;
/**
* <code>TimeZoneTransition</code> is a class representing a time zone transition.
* An instance has a time of transition and rules for both before and after the transition.
* @stable ICU 4.0
*/
class U_I18N_API TimeZoneTransition : public UObject {
public:
/**
* Constructs a <code>TimeZoneTransition</code> with the time and the rules before/after
* the transition.
*
* @param time The time of transition in milliseconds since the base time.
* @param from The time zone rule used before the transition.
* @param to The time zone rule used after the transition.
* @stable ICU 4.0
*/
TimeZoneTransition(UDate time, const TimeZoneRule& from, const TimeZoneRule& to);
/**
* Constructs an empty <code>TimeZoneTransition</code>
* @stable ICU 4.0
*/
TimeZoneTransition();
/**
* Copy constructor.
* @param source The TimeZoneTransition object to be copied.
* @stable ICU 4.0
*/
TimeZoneTransition(const TimeZoneTransition& source);
/**
* Destructor.
* @stable ICU 4.0
*/
~TimeZoneTransition();
/**
* Clone this TimeZoneTransition object polymorphically. The caller owns the result and
* should delete it when done.
* @return A copy of the object.
* @stable ICU 4.0
*/
TimeZoneTransition* clone(void) const;
/**
* Assignment operator.
* @param right The object to be copied.
* @stable ICU 4.0
*/
TimeZoneTransition& operator=(const TimeZoneTransition& right);
/**
* Return true if the given TimeZoneTransition objects are semantically equal. Objects
* of different subclasses are considered unequal.
* @param that The object to be compared with.
* @return true if the given TimeZoneTransition objects are semantically equal.
* @stable ICU 4.0
*/
UBool operator==(const TimeZoneTransition& that) const;
/**
* Return true if the given TimeZoneTransition objects are semantically unequal. Objects
* of different subclasses are considered unequal.
* @param that The object to be compared with.
* @return true if the given TimeZoneTransition objects are semantically unequal.
* @stable ICU 4.0
*/
UBool operator!=(const TimeZoneTransition& that) const;
/**
* Returns the time of transition in milliseconds.
* @return The time of the transition in milliseconds since the 1970 Jan 1 epoch time.
* @stable ICU 4.0
*/
UDate getTime(void) const;
/**
* Sets the time of transition in milliseconds.
* @param time The time of the transition in milliseconds since the 1970 Jan 1 epoch time.
* @stable ICU 4.0
*/
void setTime(UDate time);
/**
* Returns the rule used before the transition.
* @return The time zone rule used after the transition.
* @stable ICU 4.0
*/
const TimeZoneRule* getFrom(void) const;
/**
* Sets the rule used before the transition. The caller remains
* responsible for deleting the <code>TimeZoneRule</code> object.
* @param from The time zone rule used before the transition.
* @stable ICU 4.0
*/
void setFrom(const TimeZoneRule& from);
/**
* Adopts the rule used before the transition. The caller must
* not delete the <code>TimeZoneRule</code> object passed in.
* @param from The time zone rule used before the transition.
* @stable ICU 4.0
*/
void adoptFrom(TimeZoneRule* from);
/**
* Sets the rule used after the transition. The caller remains
* responsible for deleting the <code>TimeZoneRule</code> object.
* @param to The time zone rule used after the transition.
* @stable ICU 4.0
*/
void setTo(const TimeZoneRule& to);
/**
* Adopts the rule used after the transition. The caller must
* not delete the <code>TimeZoneRule</code> object passed in.
* @param to The time zone rule used after the transition.
* @stable ICU 4.0
*/
void adoptTo(TimeZoneRule* to);
/**
* Returns the rule used after the transition.
* @return The time zone rule used after the transition.
* @stable ICU 4.0
*/
const TimeZoneRule* getTo(void) const;
private:
UDate fTime;
TimeZoneRule* fFrom;
TimeZoneRule* fTo;
public:
/**
* Return the class ID for this class. This is useful only for comparing to
* a return value from getDynamicClassID(). For example:
* <pre>
* . Base* polymorphic_pointer = createPolymorphicObject();
* . if (polymorphic_pointer->getDynamicClassID() ==
* . erived::getStaticClassID()) ...
* </pre>
* @return The class ID for all objects of this class.
* @stable ICU 4.0
*/
static UClassID U_EXPORT2 getStaticClassID(void);
/**
* Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This
* method is to implement a simple version of RTTI, since not all C++
* compilers support genuine RTTI. Polymorphic operator==() and clone()
* methods call this method.
*
* @return The class ID for this object. All objects of a
* given class have the same class ID. Objects of
* other classes have different class IDs.
* @stable ICU 4.0
*/
virtual UClassID getDynamicClassID(void) const;
};
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif // TZTRANS_H
//eof
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