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(.module:
[library
[lux (#- and int)
[ffi (#+ import:)]
[control
[functor (#+ Functor)]
[apply (#+ Apply)]
[monad (#+ Monad do)]
["ex" exception]
["." try (#+ Try)]]
[time
["." instant (#+ Instant)]]
["." io (#+ IO)]
[world
[binary (#+ Binary)]]]])
(import: java/lang/String)
(import: java/util/Date
(getTime [] long))
(import: java/sql/Date)
(import: java/sql/Time)
(import: java/sql/Timestamp)
(`` (import: java/sql/ResultSet
(~~ (template [<method_name> <return_class>]
[(<method_name> [int] #try <return_class>)]
[getBoolean boolean]
[getByte byte]
[getShort short]
[getInt int]
[getLong long]
[getDouble double]
[getFloat float]
[getString java/lang/String]
[getBytes [byte]]
[getDate java/sql/Date]
[getTime java/sql/Time]
[getTimestamp java/sql/Timestamp]
))
(next [] #try boolean)
(close [] #io #try void)))
(type: .public (Output a)
(-> [Nat java/sql/ResultSet] (Try [Nat a])))
(implementation: .public functor
(Functor Output)
(def: (each f fa)
(function (_ idx+rs)
(case (fa idx+rs)
(#try.Failure error)
(#try.Failure error)
(#try.Success [idx' value])
(#try.Success [idx' (f value)])))))
(implementation: .public apply
(Apply Output)
(def: &functor ..functor)
(def: (apply ff fa)
(function (_ [idx rs])
(case (ff [idx rs])
(#try.Success [idx' f])
(case (fa [idx' rs])
(#try.Success [idx'' a])
(#try.Success [idx'' (f a)])
(#try.Failure msg)
(#try.Failure msg))
(#try.Failure msg)
(#try.Failure msg)))))
(implementation: .public monad
(Monad Output)
(def: &functor ..functor)
(def: (in a)
(function (_ [idx rs])
(#.Some [idx a])))
(def: (conjoint mma)
(function (_ [idx rs])
(case (mma [idx rs])
(#try.Failure error)
(#try.Failure error)
(#try.Success [idx' ma])
(ma [idx' rs])))))
(def: .public (fail error)
(All (_ a) (-> Text (Output a)))
(function (_ [idx result_set])
(#try.Failure error)))
(def: .public (and left right)
(All (_ a b)
(-> (Output a) (Output b) (Output [a b])))
(do ..monad
[=left left
=right right]
(in [=left =right])))
(template [<func_name> <method_name> <type>]
[(def: .public <func_name>
(Output <type>)
(function (_ [idx result_set])
(case (<method_name> [(.int idx)] result_set)
(#try.Failure error)
(#try.Failure error)
(#try.Success value)
(#try.Success [(++ idx) value]))))]
[boolean java/sql/ResultSet::getBoolean Bit]
[byte java/sql/ResultSet::getByte Int]
[short java/sql/ResultSet::getShort Int]
[int java/sql/ResultSet::getInt Int]
[long java/sql/ResultSet::getLong Int]
[float java/sql/ResultSet::getFloat Frac]
[double java/sql/ResultSet::getDouble Frac]
[string java/sql/ResultSet::getString Text]
[bytes java/sql/ResultSet::getBytes Binary]
)
(template [<func_name> <method_name>]
[(def: .public <func_name>
(Output Instant)
(function (_ [idx result_set])
(case (<method_name> [(.int idx)] result_set)
(#try.Failure error)
(#try.Failure error)
(#try.Success value)
(#try.Success [(++ idx)
(instant.from_millis (java/util/Date::getTime value))]))))]
[date java/sql/ResultSet::getDate]
[time java/sql/ResultSet::getTime]
[time_stamp java/sql/ResultSet::getTimestamp]
)
(def: .public (rows output results)
(All (_ a) (-> (Output a) java/sql/ResultSet (IO (Try (List a)))))
(case (java/sql/ResultSet::next results)
(#try.Success has_next?)
(if has_next?
(case (output [1 results])
(#.Some [_ head])
(do io.monad
[?tail (rows output results)]
(case ?tail
(#try.Success tail)
(in (#try.Success (#.Item head tail)))
(#try.Failure error)
(do io.monad
[temp (java/sql/ResultSet::close results)]
(in (do try.monad
[_ temp]
(try.failure error))))))
(#try.Failure error)
(do io.monad
[temp (java/sql/ResultSet::close results)]
(in (do try.monad
[_ temp]
(try.failure error)))))
(do io.monad
[temp (java/sql/ResultSet::close results)]
(in (do try.monad
[_ temp]
(in (list))))))
(#try.Failure error)
(do io.monad
[temp (java/sql/ResultSet::close results)]
(in (do try.monad
[_ temp]
(try.failure error))))
))
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