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#ifndef GUARD_PERST_H_INCLUDE
#define GUARD_PERST_H_INCLUDE

#include <perst/perst-config.h>
#include <perst/perst_interface.h>

class PERST_EXPORT PerSt : public PerstInterface {

public:
    struct KbData;

    enum EntryType {
        EGROUP, 
        EARRAY, 
        EVALUE  
    };

    enum KbForEachResult {
        KBFER_CONTINUE, 
        KBFER_BREAK, 
        KBFER_SKIP_KIDS 
    };

    typedef KbForEachResult (*kbForEach) (
            KbData * data,
            const PERST_STRING & name,
            EntryType kind);

    struct KbData {
        kbForEach group_start_;
        kbForEach group_end_;
        kbForEach array_start_;
        kbForEach array_end_;
        kbForEach value_;
        void * opaque_;
    };

protected:

    PerSt ();

public:

    virtual ~PerSt();

    virtual PERST_STRING location () {
        return location_;
    }

    int
    arrayIndex () const {
        return array_index_;
    }

    PERST_STRING
    group () const {
        return current_group_name_;
    }

    PERST_SLIST
    groupPath () const {
        return current_group_path_;
    }

protected:

    bool
    setArrayIndexInternal (
            int value);

    bool endArrayInternal (
            const PERST_STRING & name);

    bool
    beginGroupInternal (
            const PERST_STRING & name);

    bool
    endGroupInternal (
            const PERST_STRING &name = "");

    bool
    preSaveValue (
            const PERST_STRING & name);


    virtual void setLocation (
            const PERST_STRING & value) {
        location_ = value;
    }

private:
    PERST_STRING location_; 
    PERST_SLIST current_group_path_; 
    PERST_STRING current_group_name_; 
    int array_index_; 
    std::list<int> array_indices_; 
};

#endif // GUARD_PERST_H_INCLUDE