127 lines
3.6 KiB
Factor
Executable File
127 lines
3.6 KiB
Factor
Executable File
! Copyright (C) 2008 Doug Coleman.
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! See http://factorcode.org/license.txt for BSD license.
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USING: arrays assocs classes continuations kernel math
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namespaces sequences sequences.lib tuples words strings
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tools.walker new-slots accessors ;
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IN: db
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TUPLE: db
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handle
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insert-statements
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update-statements
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delete-statements ;
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: <db> ( handle -- obj )
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H{ } clone H{ } clone H{ } clone
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db construct-boa ;
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GENERIC: make-db* ( seq class -- db )
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GENERIC: db-open ( db -- )
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HOOK: db-close db ( handle -- )
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: make-db ( seq class -- db ) construct-empty make-db* ;
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: dispose-statements ( seq -- ) [ dispose drop ] assoc-each ;
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: dispose-db ( db -- )
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dup db [
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dup insert-statements>> dispose-statements
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dup update-statements>> dispose-statements
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dup delete-statements>> dispose-statements
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handle>> db-close
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] with-variable ;
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TUPLE: statement handle sql in-params out-params bind-params bound? ;
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TUPLE: simple-statement ;
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TUPLE: prepared-statement ;
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TUPLE: result-set sql in-params out-params handle n max ;
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: <statement> ( sql in out -- statement )
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{ (>>sql) (>>in-params) (>>out-params) } statement construct ;
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HOOK: <simple-statement> db ( str in out -- statement )
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HOOK: <prepared-statement> db ( str in out -- statement )
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GENERIC: prepare-statement ( statement -- )
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GENERIC: bind-statement* ( statement -- )
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GENERIC: bind-tuple ( tuple statement -- )
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GENERIC: query-results ( query -- result-set )
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GENERIC: #rows ( result-set -- n )
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GENERIC: #columns ( result-set -- n )
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GENERIC# row-column 1 ( result-set column -- obj )
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GENERIC# row-column-typed 1 ( result-set column -- sql )
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GENERIC: advance-row ( result-set -- )
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GENERIC: more-rows? ( result-set -- ? )
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: execute-statement ( statement -- )
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dup sequence? [
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[ execute-statement ] each
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] [
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query-results dispose
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] if ;
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: bind-statement ( obj statement -- )
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swap >>bind-params
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[ bind-statement* ] keep
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t >>bound? drop ;
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: init-result-set ( result-set -- )
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dup #rows >>max
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0 >>n drop ;
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: <result-set> ( query handle tuple -- result-set )
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>r >r { sql>> in-params>> out-params>> } get-slots r>
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{ (>>sql) (>>in-params) (>>out-params) (>>handle) } result-set
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construct r> construct-delegate ;
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: sql-row ( result-set -- seq )
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dup #columns [ row-column ] with map ;
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: sql-row-typed ( result-set -- seq )
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dup #columns [ row-column-typed ] with map ;
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: query-each ( statement quot -- )
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over more-rows? [
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[ call ] 2keep over advance-row query-each
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] [
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2drop
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] if ; inline
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: query-map ( statement quot -- seq )
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accumulator >r query-each r> { } like ; inline
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: with-db ( db seq quot -- )
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>r make-db dup db-open db r>
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[ db get swap [ drop ] swap compose with-disposal ] curry with-variable ;
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: default-query ( query -- result-set )
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query-results [ [ sql-row ] query-map ] with-disposal ;
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: do-bound-query ( obj query -- rows )
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[ bind-statement ] keep default-query ;
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: do-bound-command ( obj query -- )
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[ bind-statement ] keep execute-statement ;
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SYMBOL: in-transaction
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HOOK: begin-transaction db ( -- )
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HOOK: commit-transaction db ( -- )
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HOOK: rollback-transaction db ( -- )
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: in-transaction? ( -- ? ) in-transaction get ;
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: with-transaction ( quot -- )
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t in-transaction [
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begin-transaction
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[ ] [ rollback-transaction ] cleanup commit-transaction
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] with-variable ;
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: sql-query ( sql -- rows )
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f f <simple-statement> [ default-query ] with-disposal ;
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: sql-command ( sql -- )
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dup string? [
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f f <simple-statement> [ execute-statement ] with-disposal
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] [
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! [
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[ sql-command ] each
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! ] with-transaction
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] if ;
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