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/* qdbusvariant.h DBUS variant struct
*
* Copyright (C) 2005 Harald Fernengel <[email protected]>
*
* Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
*/
#ifndef TQDBUSVARIANT_H
#define TQDBUSVARIANT_H
#include "tqdbusmacros.h"
#include "tqdbusdata.h"
#include <tqstring.h>
/**
* @brief Data type for representing a D-Bus variant
*
* When D-Bus methods or signal require that a paramater can have any of the
* D-Bus data types, a D-Bus variant can be used.
*
* Basically a D-Bus variant includes the actual data and a D-Bus data signature
* to allow a receiver to determine the contents.
*
* Since the TQT_DBusVariant's #value member will already be fully de-marshalled,
* a receiver using this bindings can savely ignore the signature if it doesn't
* need it for a different purpose (e.g. logging).
*
* However, when creating a TQT_DBusVariant object for sending, make sure the
* #signature member is correctly setup, for example by using the #value
* member's buildDBusSignature() method.
*
* @code
* TQT_DBusVariant variant;
*
* variant.value = TQT_DBusData::fromInt32(131719);
* variant.signature = variant.value.buildDBusSignature();
* @endcode
*/
class TQDBUS_EXPORT TQT_DBusVariant
{
public:
/**
* @brief Creates an empty variant object
*/
TQT_DBusVariant() {}
/**
* @brief Copies the given @p other variant object
*
* @param other the variant object to copy from
*/
TQT_DBusVariant(const TQT_DBusVariant& other)
{
signature = other.signature;
value = other.value;
}
/**
* @brief Checks if the given @p other variant is equal to this one
*
* @param other the variant object to compare with
*
* @return @c true if both #signature and #value are equal, otherwise
* @c false
*/
inline bool operator==(const TQT_DBusVariant& other) const
{
if (&other == this) return true;
return signature == other.signature && value == other.value;
}
/**
* @brief Checks if the given @p other variant is not equal to this one
*
* @param other the variant object to compare with
*
* @return @c true if either #signature or #value is different, otherwise
* @c false
*/
inline bool operator!=(const TQT_DBusVariant& other) const
{
if (&other == this) return false;
return signature != other.signature || value != other.value;
}
public:
/**
* @brief The D-Bus data signature of the data contained in #value
*
* @see TQT_DBusData::buildDBusSignature()
*/
TQString signature;
/**
* @brief The D-Bus data type to transport as a variant
*/
TQT_DBusData value;
};
#endif
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