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|
(***********************************************************************)
(* *)
(* GALAX *)
(* XQuery Engine *)
(* *)
(* Copyright 2001-2007. *)
(* Distributed only by permission. *)
(* *)
(***********************************************************************)
(* $Id: cs_util_coercion.mli,v 1.19 2007/10/16 01:25:34 mff Exp $ *)
(* Module: Cs_util_coercion
Description:
This module implements coercion operation for algebraic operators
input and output.
*)
open Xquery_algebra_ast
open Execution_context
open Algebra_type
open Cursor
open Streaming_types
open Physical_value
(* Coercion functions for the data models.
These are characterized by:
- Number of dependant algebraic parameters
- Number of independant algebraic parameters
- Data Model of incoming parameters
* Assumed to be homogenous unless otherwise stated
- Data Model of outcoming parameter
* Note: dependant expressions are not coerced so should
really not be an axis that we differentiate on *)
(* The following are coercions that have to deal with
dependant expressions. No coercision actually happens here.
They serve to wrap up the types correctly
For typical usage see algebra_compile.ml
*)
val coerce_nodep:
'a -> ('a -> alg_eval_code) -> alg_eval_code_dep
val coerce_unitdep:
(unit -> eval_fun -> 'a) -> unit ->
('a -> alg_eval_code) -> alg_eval_code_dep
val coerce_onedep:
(algop_expr -> eval_fun -> 'a) -> algop_expr ->
('a -> alg_eval_code ) -> alg_eval_code_dep
val coerce_twodep:
((algop_expr * algop_expr) -> eval_fun -> 'a) -> (algop_expr * algop_expr) ->
('a -> alg_eval_code ) -> alg_eval_code_dep
val coerce_manydep:
((algop_expr array) -> eval_fun -> 'a) -> algop_expr array ->
('a -> alg_eval_code ) -> alg_eval_code_dep
val coerce_nodep_prolog:
'a -> ('a -> alg_eval_code_prolog) -> alg_eval_code_dep_prolog
val coerce_onedep_prolog:
(algop_expr -> eval_fun -> 'a) -> algop_expr ->
('a -> alg_eval_code_prolog) -> alg_eval_code_dep_prolog
(* These are coercions for the physical data model
The nomenclature is given n input parameters are of type x
and the return type of type y. coerce_n_x_to_y.
Parameters are assumed to be of the same type unless
otherwise stated (coerce_binary_xml_and_sax_to_sax for example). *)
val coerce_unit_to_xml:
(algebra_context -> unit -> xml_value)
-> (alg_eval_code)
val coerce_unit_to_sax:
(algebra_context -> unit -> typed_xml_stream)
-> (alg_eval_code)
val coerce_unit_to_item_cursor:
(algebra_context -> unit -> item cursor)
-> alg_eval_code
val coerce_unit_to_item_list:
(algebra_context -> unit -> item list)
-> alg_eval_code
val coerce_unit_to_physical_value:
(algebra_context -> unit -> physical_value)
-> alg_eval_code
val coerce_unit_to_tuple:
(algebra_context -> unit -> tuple_unit)
-> alg_eval_code
val coerce_unit_to_item:
(algebra_context -> unit -> item)
-> alg_eval_code
val coerce_unary_sax_to_sax:
(algebra_context -> typed_xml_stream -> typed_xml_stream)
-> alg_eval_code
val coerce_binary_sax_to_sax:
(algebra_context -> typed_xml_stream -> typed_xml_stream -> typed_xml_stream)
-> alg_eval_code
val coerce_unary_sax_to_item_list:
(algebra_context -> typed_xml_stream -> item list)
-> alg_eval_code
val coerce_unary_sax_to_item_cursor:
(algebra_context -> typed_xml_stream -> item cursor)
-> alg_eval_code
val coerce_unary_sax_to_tuple_cursor:
(algebra_context -> typed_xml_stream -> tuple_unit cursor)
-> alg_eval_code
val coerce_unary_sax_to_physical_value:
(algebra_context -> typed_xml_stream -> physical_value)
-> alg_eval_code
val coerce_unary_xml_to_xml:
(algebra_context -> xml_value -> xml_value)
-> alg_eval_code
val coerce_unary_xml_to_physical_value:
(algebra_context -> xml_value -> physical_value)
-> alg_eval_code
val coerce_unary_xml_to_item_list:
(algebra_context -> xml_value -> item list)
-> alg_eval_code
val coerce_unary_xml_to_tuple_cursor:
(algebra_context -> xml_value -> tuple_unit cursor)
-> alg_eval_code
val coerce_unary_item_cursor_to_tuple_cursor:
(algebra_context -> item cursor -> tuple_unit cursor)
-> alg_eval_code
val coerce_unary_tuple_cursor_to_item_cursor:
(algebra_context -> tuple_unit cursor -> item cursor)
-> alg_eval_code
val coerce_unary_tuple_cursor_to_tuple_cursor:
(algebra_context -> tuple_unit cursor -> tuple_unit cursor)
-> alg_eval_code
val coerce_unary_tuple_cursor_to_xml:
(algebra_context -> tuple_unit cursor -> xml_value)
-> alg_eval_code
val coerce_binary_tuple_cursor_to_tuple_cursor:
(algebra_context -> tuple_unit cursor -> tuple_unit cursor -> tuple_unit cursor)
-> alg_eval_code
val coerce_binary_tuple_to_tuple:
(algebra_context -> tuple_unit -> tuple_unit -> tuple_unit)
-> alg_eval_code
val coerce_binary_item_cursor_to_item_cursor :
(algebra_context -> item cursor -> item cursor -> item cursor)
-> alg_eval_code
val coerce_binary_item_cursor_to_item_list :
(algebra_context -> item cursor -> item cursor -> item list)
-> alg_eval_code
val coerce_binary_item_cursor_to_tuple_cursor :
(algebra_context -> item cursor -> item cursor -> tuple_unit cursor) -> alg_eval_code
val coerce_unary_item_cursor_to_item_cursor:
(algebra_context -> item cursor -> item cursor)
-> alg_eval_code
val coerce_unary_item_list_to_item_list:
(algebra_context -> item list -> item list)
-> alg_eval_code
val coerce_unary_item_cursor_to_item_list :
(algebra_context -> item cursor -> item list) -> alg_eval_code
val coerce_unary_item_list_to_xml :
(algebra_context -> item list -> xml_value) -> alg_eval_code
val coerce_unary_item_list_to_physical_value :
(algebra_context -> item list -> physical_value) -> alg_eval_code
val coerce_unary_item_list_to_tuple_cursor :
(algebra_context -> item list -> tuple_unit cursor) -> alg_eval_code
val coerce_unary_item_cursor_to_physical_value:
(algebra_context -> item cursor -> physical_value) -> alg_eval_code
val coerce_unary_item_cursor_to_xml:
(algebra_context -> item cursor -> xml_value)
-> alg_eval_code
val coerce_unary_tuple_cursor_to_physical_value:
(algebra_context -> tuple_unit cursor -> physical_value)
-> alg_eval_code
val coerce_binary_item_list_to_item_list :
(algebra_context -> item list -> item list -> item list)
-> alg_eval_code
val coerce_binary_xml_and_sax_to_sax :
(algebra_context -> xml_value -> typed_xml_stream -> typed_xml_stream) -> alg_eval_code
val coerce_binary_item_cursor_and_sax_to_sax :
(algebra_context -> item cursor -> typed_xml_stream -> typed_xml_stream) -> alg_eval_code
val coerce_binary_xml_and_xml_to_sax :
(algebra_context -> xml_value -> xml_value -> typed_xml_stream)
-> alg_eval_code
val coerce_many_sax_to_sax :
(algebra_context -> typed_xml_stream array -> typed_xml_stream)
-> alg_eval_code
val coerce_many_sax_to_item_list :
(algebra_context -> typed_xml_stream array -> item list)
-> alg_eval_code
val coerce_many_xml_to_tuple:
(algebra_context -> xml_value array -> tuple_unit)
-> alg_eval_code
val coerce_many_item_cursor_to_item_cursor:
(algebra_context -> item cursor array -> item cursor)
-> alg_eval_code
val coerce_many_item_list_to_item_list:
(algebra_context -> item list array -> item list)
-> alg_eval_code
val coerce_many_item_cursor_to_physical_value:
(algebra_context -> item cursor array -> physical_value)
-> alg_eval_code
val coerce_binary_item_cursor_tuple_cursor_to_tuple_cursor:
(algebra_context -> item cursor -> tuple_unit cursor -> tuple_unit cursor)
-> alg_eval_code
(* Prolog coercions *)
val coerce_unary_item_cursor_to_algebra_context :
(algebra_context -> item cursor -> algebra_context)
-> alg_eval_code_prolog
val coerce_unit_to_algebra_context :
(algebra_context -> unit -> algebra_context)
-> alg_eval_code_prolog
|
