VRS - The Virtual Rendering System

version 3.3

typeinfo.h

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/******************************************************************************
 * VRS - The Virtual Rendering System
 * Copyright (C) 2000-2008 Computer Graphics Systems Group at the 
 * Hasso-Plattner-Institute (HPI), Potsdam, Germany.
 *
 * This  library  is  free  software; you can redistribute it and/or  modify it
 * under the terms of the GNU Lesser General Public  License  as  published  by
 * the  Free  Software  Foundation;  either  version 2.1 of the License, or (at
 * your option) any later version. This library  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 Lesser General Public License for more details. You should have received
 * a copy of the GNU Lesser+ General Public License along with this library; if
 * not, write to the FreeSoftware Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA, 02111-1307, USA.
 ******************************************************************************/

#ifndef VRS_TYPEINFO_H
#define VRS_TYPEINFO_H

#include <vrs/config.h>
#include <vrs/id.h>
#include <vrs/serializationmacros.h>
#include <typeinfo>

namespace VRS {

class SharedObj;
class SerializationManager;

class VRS_CORE_API ClassInfo {
public:
    ClassInfo(const std::type_info& typeInfo, const ClassInfo* parent);

    const std::type_info* typeInfo() const { return typeInfo_; }
    const ID& name() const { return name_; }
    const ClassInfo* parent() const { return parent_; }

    bool isA(const ID& base) const;

private:
    const std::type_info* typeInfo_;
    const ID name_;
    const ClassInfo* const parent_;
};

} // namespace VRS

//
// VRS_TYPEINFO Header Macro
//
// This macro specifies the methods used for VRS_TYPEINFO
// in subclasses of SharedObj. It is provided
// for convenience.
//

#define VRS_TYPEINFO(THIS_CLASS, BASE_CLASS)                          \
    typedef THIS_CLASS VRS_ThisClass;                                 \
    typedef BASE_CLASS VRS_BaseClass;                                 \
    virtual bool isEqual(const ::VRS::SharedObj* other) const {       \
        if(!other) { return false; }                                  \
        if(this == other) { return true; }                            \
        if(ClassInfoVRS() != other->classInfoVRS()) { return false; } \
        return (*this == static_cast<const THIS_CLASS&>(*other));     \
    }                                                                 \
    static const ::VRS::ClassInfo* ClassInfoVRS() {                   \
        static const ::VRS::ClassInfo cInfo(                          \
            typeid(THIS_CLASS),                                       \
            BASE_CLASS::ClassInfoVRS()                                \
        );                                                            \
        return &cInfo;                                                \
    }                                                                 \
    virtual const ::VRS::ClassInfo* classInfoVRS() const {            \
        return ClassInfoVRS();                                        \
    }                                                                 \
    static const ::VRS::ID& ClassNameVRS() {                          \
        return ClassInfoVRS()->name();                                \
    }                                                                 \
    VRS_VISITABLE;


//
// helper functions
//
// e.g.: VRS_IMPL_TYPEINFO_TEMPLATE_3(T1, T2, T3, SomeClass, VRS_TEMPLATE_ARGS_2(T1, T3, BaseClass))
//
#define VRS_TEMPLATE_ARGS_1(T1, CLASS)                  CLASS< T1 >
#define VRS_TEMPLATE_ARGS_2(T1, T2, CLASS)              CLASS< T1, T2 >
#define VRS_TEMPLATE_ARGS_3(T1, T2, T3, CLASS)          CLASS< T1, T2, T3 >
#define VRS_TEMPLATE_ARGS_4(T1, T2, T3, T4, CLASS)      CLASS< T1, T2, T3, T4 >
#define VRS_TEMPLATE_ARGS_5(T1, T2, T3, T4, T5, CLASS)  CLASS< T1, T2, T3, T4, T5 >

#endif // VRS_TYPEINFO_H

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