ShapeAttribute

/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2007 Robert Osfield
 *
 * This library is open source and may be redistributed and/or modified under
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * 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
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSGSIM_SHAPEATTRIBUTE
#define OSGSIM_SHAPEATTRIBUTE 1

#include <osg/Object>
#include <osg/MixinVector>

#include <osgSim/Export>

namespace osgSim
{

class OSGSIM_EXPORT ShapeAttribute
{
    public:
        /// ShapeAttribute data type. 
        enum Type
        {
            UNKNOWN,
            INTEGER,
            DOUBLE,
            STRING
        };
      
        ShapeAttribute();
        ShapeAttribute(const char * name);
        ShapeAttribute(const char * name, int value);
        ShapeAttribute(const char * name, double value);
        
        /** Note, ShapeAttribute takes a copy of both name and value, the calling code should manage its own clean up of the original strings.*/
        ShapeAttribute(const char * name, const char * value);
        
        ShapeAttribute(const ShapeAttribute & sa);
            
        ~ShapeAttribute();
        
        ShapeAttribute& operator = (const ShapeAttribute& sa);
        
        /** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/
        int compare(const osgSim::ShapeAttribute& sa) const;

        inline bool operator == (const osgSim::ShapeAttribute& sa) const { return compare(sa)==0; }
        inline bool operator != (const osgSim::ShapeAttribute& sa) const { return compare(sa)!=0; }
        inline bool operator <  (const osgSim::ShapeAttribute& sa) const { return compare(sa)<0; }

        /// Get the attribute name.
        const std::string & getName() const { return _name; }

        /// Set the attribute name.
        void setName(const std::string& name) { _name = name; }

        /// Get the attribute data type.
        const Type getType() const { return _type; }
        
        /// Get the attribute data as an int.
        int getInt() const { return _integer; }

        /// Get the attribute data as a double.
        double getDouble() const { return _double; }

        /// Get the attribute data as a string.
        const char * getString() const { return _string; }
       
        /// Set an integer attribute data.
        void setValue(int value) { free(); _type = INTEGER; _integer = value; }

        /// Set a double attribute data.
        void setValue(double value) { free(); _type = DOUBLE; _double = value; }

        /// Set a string attribute data.
        void setValue(const char * value);

        
    private:
    
        void free();
        void copy(const ShapeAttribute& sa);
        
        std::string _name;
        Type _type;
        
        union
        {
            int _integer;
            double _double;
            char* _string;
        };
};

class OSGSIM_EXPORT ShapeAttributeList : public osg::Object, public osg::MixinVector<ShapeAttribute>
{
    public:
        META_Object(osgSim, ShapeAttributeList)
    
        ShapeAttributeList():
            Object()
        {}
        
        /** Copy constructor, optional CopyOp object can be used to control
          * shallow vs deep copying of dynamic data.*/
        ShapeAttributeList(const ShapeAttributeList& sal,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
            osg::Object(sal, copyop),
            osg::MixinVector<ShapeAttribute>(sal)
        {
        }
    
        /** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/
        virtual int compare(const osgSim::ShapeAttributeList& sal) const;
        
    protected:
        virtual ~ShapeAttributeList() {}
};

}

#endif // ** SHAPEATTRIBUTE_ ** //