#ifndef __FILTEREDQUERY_H
#define __FILTEREDQUERY_H

#include <Query.h>

#include "ObjectList.h"

typedef bool (*filter_function)(const entry_ref *ref, void *arg);

struct filter_pair {
        filter_function filter;
        void *args;

        filter_pair(filter_function function, void *arguments)
        {
                filter = function;
                args = arguments;
        }
};


class TFilteredQuery : public BQuery {
public:
        TFilteredQuery();

        // BQuery doesn't have a copy constructor. We supply
        // this method to workaround this problem
        TFilteredQuery(const BQuery &query);
        TFilteredQuery(const TFilteredQuery &query);
        virtual ~TFilteredQuery();

        bool AddFilter(filter_function function, void *arg);
        void RemoveFilter(filter_function function);

        virtual status_t GetNextRef(entry_ref *ref);
        virtual status_t GetNextEntry(BEntry *entry, bool traverse = false);

        status_t Clear();

private:
        BObjectList<filter_pair> fFilters;
};

#endif //__FILTEREDQUERY_H