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  • Committer: edam
  • Date: 2010-07-27 15:12:55 UTC
  • Revision ID: edam@waxworlds.org-20100727151255-goaqgdz4kj13q7gz
- update TODO
- added some missing includes for <string>
- changed usage of database::exec() to not require return code!
- prevented transaction_guard destructor from throwing an exception

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include/sqlite3cc/query.h
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#define SQLITE3CC_QUERY_H_
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#include <boost/iterator/iterator_facade.hpp>
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#include <sqlite3cc/basic_statement.h>
 
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#include <sqlite3cc/row.h>
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namespace sqlite
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{
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class row;
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class query
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        :
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        public basic_statement
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        row step();
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        /**
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         * Get the number of columns in the result of
 
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         * Get the number of columns in the results
 
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         * @see sqlite3_column_count()
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         */
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        unsigned int column_count();
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        /**
 
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         * Get the name of a column in the results
 
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         * @param index column index
 
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         * @see sqlite3_column_name()
 
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         */
 
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        const std::string column_name(
 
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                unsigned int index );
 
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        /**
 
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         * Query iterator which can be used to obtain rows
 
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         */
 
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        class iterator
 
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                :
 
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                public boost::iterator_facade< iterator, row,
 
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                        boost::single_pass_traversal_tag, row >
 
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        {
 
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        public:
 
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                iterator();
 
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                explicit iterator( query &query, bool valid );
 
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        private:
 
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                friend class boost::iterator_core_access;
 
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                row dereference() const;
 
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                void increment();
 
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                bool equal( iterator const &other ) const;
 
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                /** is this iterator still pointing to a valid row? */
 
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                bool _valid;
 
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                /** the query */
 
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                query &_query;
 
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        };
 
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        /**
 
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         * Return an iterator to the initial row. Note that creating an iterator
 
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         * causes step() to be called, so it should only be called to begin
 
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         * iterating over the rows and not for comparison.
 
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         * @return a query iterator
 
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         */
 
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        iterator begin();
 
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        /**
 
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         * Return an iterator to after the last row (i.e., an invalid row).
 
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         */
 
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        iterator end();
 
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//______________________________________________________________________________
 
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//                                                                implementation
 
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private:
 
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        /** next row index */
 
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        unsigned long long _next_row;
 
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};
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