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(.module:
[library
[lux {"-" and int}
[ffi {"+" import:}]
[control
[functor {"+" Functor}]
[apply {"+" Apply}]
[monad {"+" Monad do}]
["ex" exception]
["[0]" try {"+" Try}]]
[time
["[0]" instant {"+" Instant}]]
["[0]" 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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