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IgState.h

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#ifndef IGUANA_FRAMEWORK_IG_STATE_H
# define IGUANA_FRAMEWORK_IG_STATE_H

//<<<<<< INCLUDES                                                       >>>>>>

# include "Iguana/Framework/interface/config.h"
# include <vector>

//<<<<<< PUBLIC DEFINES                                                 >>>>>>
//<<<<<< PUBLIC CONSTANTS                                               >>>>>>
//<<<<<< PUBLIC TYPES                                                   >>>>>>

class IgStateElement;
class IgStateKey;

//<<<<<< PUBLIC VARIABLES                                               >>>>>>
//<<<<<< PUBLIC FUNCTIONS                                               >>>>>>
//<<<<<< CLASS DECLARATIONS                                             >>>>>>

class IGUANA_FRAMEWORK_API IgState
{
public:
    IgState (IgState *parent = 0);
    ~IgState (void);

    IgStateElement *    get (IgStateKey index, IgState **context = 0) const;
    void                put (IgStateKey index, IgStateElement *element);
    void                erase (IgStateKey index);
    void                detach (IgStateKey index);

    IgState *           root (void) const;
    IgState *           parent (void) const;
    unsigned            children (void) const;
    IgState *           child (unsigned index) const;
    unsigned            elements (void) const;
    IgStateElement *    element (unsigned index) const;

private:
    typedef std::vector<IgState *>        Children;
    typedef std::vector<IgStateElement *> Elements;

    void                addChild (IgState *child);
    void                detachChild (IgState *child);

    IgState             *m_parent;      //< Parent state, null if this is root
    Children            m_children;     //< Sub-states.
    Elements            m_elements;     //< Presently recorded elements.

    // undefined, no semantics
    IgState (const IgState &x);
    IgState &operator= (const IgState &x);
};

//<<<<<< INLINE PUBLIC FUNCTIONS                                        >>>>>>
//<<<<<< INLINE MEMBER FUNCTIONS                                        >>>>>>

#endif // IGUANA_FRAMEWORK_IG_SESSION_H

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