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open Printf ;;
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open Pxp_document ;;
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open Schema_types ;;
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(* TODO when looking for xsd:{restriction,extension,...} has_element is used so
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actually is possible that both more of them are provided.
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IDEA: validate schema document using DTD for Schemas? *)
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exception Not_implemented of string ;;
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let debug = true ;;
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let hashtbl_values tbl = Hashtbl.fold (fun _ valu acc -> valu :: acc) tbl [] ;;
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let rec filter_out_none = function (* not tail recursive *)
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| [] -> []
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| Some v :: tl -> v :: filter_out_none tl
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| None :: tl -> filter_out_none tl
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;;
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let get_facet_nodes n = [] (* TODO facets *) ;;
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let restrict_simple_type base_type_def facets = base_type_def ;;
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let get_minOccurs n =
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try
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int_of_string n#extension#minOccurs
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with Not_found -> 1
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;;
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let get_maxOccurs n =
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try
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(match n#extension#maxOccurs with
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| "unbounded" -> None
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| s -> Some (int_of_string s))
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with Not_found -> Some 1
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;;
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let content_type_of_def = function
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| S def -> CT_simple def
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| C (CBuilt_in _) -> assert false
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| C (CUser_defined (_, _, _, _, ct)) -> ct
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;;
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let parse_facet resolver base_type_def n =
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let validate_base_type =
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Schema_validator.validate_simple_type base_type_def
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in
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let value =
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try
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n#extension#value
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with Not_found ->
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raise (XSD_validation_error "Missing required 'value' attribute")
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in
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let fixed =
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try
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bool_of_string n#extension#fixed
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with
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| Not_found -> false
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| Invalid_argument "bool_of_string" ->
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raise (XSD_validation_error (sprintf
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"Invalid value for 'fixed' attribute: '%s'" n#extension#fixed))
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in
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match n#node_type with
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| T_element "xsd:length" ->
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let length =
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Value.get_int (Schema_builtin.validate_nonNegativeInteger value)
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in
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F_length (length, fixed)
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| T_element "xsd:minLength" ->
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let length =
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Value.get_int (Schema_builtin.validate_nonNegativeInteger value)
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in
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F_minLength (length, fixed)
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| T_element "xsd:maxLength" ->
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let length =
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Value.get_int (Schema_builtin.validate_nonNegativeInteger value)
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in
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F_maxLength (length, fixed)
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| T_element "xsd:pattern" -> (* TODO Schema regexp <> PCRE regexp :-(( *)
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F_pattern (Pcre.regexp value)
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| T_element "xsd:enumeration" ->
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F_enumeration (ValueSet.singleton (validate_base_type value))
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| T_element "xsd:whiteSpace" ->
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F_whiteSpace
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((match value with
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| "collapse" -> WS_collapse
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| "preserve" -> WS_preserve
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| "replace" -> WS_replace
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| _ ->
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raise (XSD_validation_error (sprintf
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"'%s' isn't a valid whiteSpace value" value))),
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fixed)
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| T_element "xsd:maxInclusive" ->
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F_maxInclusive (validate_base_type value, fixed)
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| T_element "xsd:maxExclusive" ->
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F_maxExclusive (validate_base_type value, fixed)
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| T_element "xsd:minInclusive" ->
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F_minInclusive (validate_base_type value, fixed)
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| T_element "xsd:minExclusive" ->
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F_minExclusive (validate_base_type value, fixed)
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| T_element "xsd:totalDigits" ->
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let digits =
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Value.get_int (Schema_builtin.validate_positiveInteger value)
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in
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F_totalDigits (digits, fixed)
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| T_element "xsd:fractionDigits" ->
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let digits =
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Value.get_int (Schema_builtin.validate_nonNegativeInteger value)
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in
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F_fractionDigits (digits, fixed)
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| T_element unexpected ->
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raise (XSD_validation_error (sprintf "'%s' isn't a valid facet element"
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unexpected))
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| _ -> assert false
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;;
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let parse_simple_type resolver n =
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assert (n#node_type = T_element "xsd:simpleType");
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SBuilt_in "FAKE" (* TODO facets *)
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(* FINQUI *)
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;;
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(** @return a value_constraint option from a attribute node *)
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let constr_of_attr_node n validate =
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let (default, fixed) =
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((try Some n#extension#default with Not_found -> None),
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(try Some n#extension#fixed with Not_found -> None))
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in
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try
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(match default, fixed with
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| Some v, None -> Some (Default (validate v))
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| None, Some v -> Some (Fixed (validate v))
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| None, None -> None
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| Some _, Some _ ->
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raise (XSD_validation_error ("Both 'default' and 'fixed' specified for \
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attribute " ^ n#extension#name)))
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with XSI_validation_error _ ->
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raise (XSD_validation_error ("Invalid value for constraint on \
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attribute " ^ n#extension#name))
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;;
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let parse_att_decl resolver n =
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let name = n#extension#name in
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match n#parent#node_type with
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| T_element "xsd:schema" -> (* global element *)
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let simple_type_def =
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(try
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parse_simple_type resolver (find_element "xsd:simpleType" n)
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with Not_found ->
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(try
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(match !(resolver#resolve_typ n#extension#typ) with
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| S st -> st
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| C _ -> failwith "Attributes can only assume simple type values")
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with Not_found -> SBuilt_in "xsd:anySimpleType"))
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in
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let self_validate =
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Schema_validator.validate_simple_type simple_type_def
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in
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let constr = constr_of_attr_node n self_validate in
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name, ref simple_type_def, constr
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| _ -> assert false (* you have to use parse_attribute_use *)
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;;
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(** @return an attribute_use option. None means that the attribute is
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prohibited *)
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let parse_attribute_use resolver n =
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assert
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(match n#node_type with T_element "xsd:attribute" -> true | _ -> false);
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let prohibited = try n#extension#prohibited with Not_found -> false in
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if prohibited then (* attribute prohibited *)
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None
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else begin (* attribute not prohibited *)
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let required = try n#extension#required with Not_found -> false in
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if n#extension#has_attribute "ref" then begin (* "ref" attribute *)
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let att_decl = !(resolver#resolve_att n#extension#ref) in
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let simple_type_def = match att_decl with (_, std, _) -> !std in
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let self_validate =
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Schema_validator.validate_simple_type simple_type_def
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in
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let constr = constr_of_attr_node n self_validate in
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Some (required, att_decl, constr)
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end else begin (* no "ref" attribute *)
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let name = n#extension#name in
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let simple_type_def =
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(try
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parse_simple_type resolver (find_element "xsd:simpleType" n)
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with Not_found ->
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(try
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(match !(resolver#resolve_typ n#extension#typ) with
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| S st -> st
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| C _ -> failwith "Attributes can only assume simple type values")
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with Not_found -> SBuilt_in "xsd:anySimpleType"))
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in
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let self_validate =
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Schema_validator.validate_simple_type simple_type_def
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in
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let att_decl = name, ref simple_type_def, None in
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let constr = constr_of_attr_node n self_validate in
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Some (required, att_decl, constr)
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end
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end
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;;
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(** @return a list of attribute uses from a xsd:restriction node wrt a base
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type definition *)
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let attribute_uses_of_restriction ~resolver ~n ~base =
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let embedded = (* associative list <name, attribute_use option> *)
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List.map
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(fun n ->
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let use = parse_attribute_use resolver n in
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n#extension#name, use)
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n#extension#find_attributes
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in
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let from_base =
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match base with
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| C (CUser_defined (_, _, _, attribute_uses, _)) ->
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List.filter (* filters out attribute uses redefined and
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prohibited in this type *)
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(fun use ->
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not (List.mem_assoc (name_of_attribute_use use) embedded))
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attribute_uses
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| _ -> []
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in
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(* remove prohibited from embedded attribute list *)
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filter_out_none (snd (List.split embedded)) @ from_base
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;;
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(** @return a list of attribute uses from a xsd:extension node wrt a base type
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definition *)
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let attribute_uses_of_extension ~resolver ~n ~base =
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let embedded = (* attribute_use option list *)
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List.map (parse_attribute_use resolver) n#extension#find_attributes
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in
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let from_base =
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match base with
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| C (CUser_defined (_, _, _, attribute_uses, _)) -> attribute_uses
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| _ -> []
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in
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filter_out_none embedded @ from_base
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;;
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let rec parse_complex_type resolver n =
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let name = try Some n#extension#name with Not_found -> None in
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if n#extension#has_element "xsd:simpleContent" then begin
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let content = find_element "xsd:simpleContent" n in
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if content#extension#has_element "xsd:restriction" then begin
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(* simpleContent, restriction *)
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let restriction = find_element "xsd:restriction" content in
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let base = resolver#resolve_typ restriction#extension#base in
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let attribute_uses =
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attribute_uses_of_restriction ~resolver ~n:restriction ~base:!base
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in
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let content_type =
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(match !base with
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| C (CUser_defined (_, _, _, _, (CT_simple base))) ->
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let base =
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try
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parse_simple_type resolver
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(find_element "xsd:simpleType" restriction)
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with Not_found -> base
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in
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CT_simple (restrict_simple_type base (get_facet_nodes n))
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| _ -> assert false)
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in
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CUser_defined (name, base, Restriction, attribute_uses, content_type)
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end else if content#extension#has_element "xsd:extension" then begin
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(* simpleContent, extension *)
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let extension = find_element "xsd:extension" content in
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let base = resolver#resolve_typ extension#extension#base in
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let attribute_uses =
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attribute_uses_of_extension ~resolver ~n:extension ~base:!base
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in
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let content_type =
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(match !base with
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| C (CUser_defined (_, _, _, _, (CT_simple base))) -> CT_simple base
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| S simple_type_def -> CT_simple simple_type_def
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| _ -> assert false)
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in
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CUser_defined (name, base, Extension, attribute_uses, content_type)
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end else
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(* simpleContent, neither extension nor restriction *)
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raise (XSD_validation_error "Neither <extension> nor <restriction> \
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element inside <simpleContent> element")
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end else if n#extension#has_element "xsd:complexContent" then begin
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let content = find_element "xsd:complexContent" n in
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if content#extension#has_element "xsd:restriction" then begin
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(* complexContent, restriction *)
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let restriction = find_element "xsd:restriction" content in
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let base = resolver#resolve_typ restriction#extension#base in
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let attribute_uses =
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attribute_uses_of_restriction ~resolver ~n:restriction ~base:!base
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in
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let content_type =
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if restriction#extension#has_no_term then begin
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CT_empty
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end else begin
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let mixed =
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(try content#extension#mixed with Not_found ->
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(try restriction#extension#mixed with Not_found -> false))
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in
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CT_model
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(parse_particle resolver restriction#extension#find_term, mixed)
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end
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in
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CUser_defined (name, base, Restriction, attribute_uses, content_type)
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end else if content#extension#has_element "xsd:extension" then begin
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(* complexContent, extension *)
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let extension = find_element "xsd:extension" content in
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let base = resolver#resolve_typ extension#extension#base in
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let attribute_uses =
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attribute_uses_of_extension ~resolver ~n:extension ~base:!base
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in
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let content_type =
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let mixed =
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(try content#extension#mixed with Not_found ->
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(try extension#extension#mixed with Not_found -> false))
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in
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let base_ct = content_type_of_def !base in
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if extension#extension#has_no_term then
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base_ct
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else
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match base_ct with
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| CT_empty ->
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CT_model
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(parse_particle resolver extension#extension#find_term, mixed)
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| CT_model (p, _) ->
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CT_model
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((1, Some 1, Sequence
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(p::[parse_particle resolver extension#extension#find_term])),
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mixed)
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| _ -> assert false
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in
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CUser_defined (name, base, Extension, attribute_uses, content_type)
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end else
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(* complexContent, neither extension nor restriction *)
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raise (XSD_validation_error "Neither <extension> nor <restriction> \
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element inside <complexContent> element")
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end else begin
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(* neither simpleContent nor simpleContent, therefore ... *)
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(* ... complexContent, restriction: shortcut *)
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let base = resolver#resolve_typ "xsd:anyType" in
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let attribute_uses =
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attribute_uses_of_restriction ~resolver ~n ~base:!base
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in
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let content_type =
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if n#extension#has_no_term then begin
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CT_empty
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end else begin
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| 347 |
let mixed = false in
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| 348 |
CT_model (parse_particle resolver n#extension#find_term, mixed)
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end
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| 350 |
in
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CUser_defined (name, base, Restriction, attribute_uses, content_type)
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end
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and parse_elt_decl resolver n =
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match n#parent#node_type with
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| T_element "xsd:schema" -> (* global element *)
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| 357 |
let name = n#extension#name in
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| 358 |
let type_def =
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| 359 |
(try
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| 360 |
S (parse_simple_type resolver (find_element "xsd:simpleType" n))
|
| 361 |
with Not_found ->
|
| 362 |
(try
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| 363 |
C (parse_complex_type resolver (find_element "xsd:complexType" n))
|
| 364 |
with Not_found ->
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| 365 |
!(resolver#resolve_typ n#extension#typ)))
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| 366 |
in
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| 367 |
name, ref type_def, None
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| 368 |
| _ -> assert false (* you have to use parse_particle *)
|
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| 370 |
and parse_particle resolver n =
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| 371 |
let (minOccurs, maxOccurs) = (get_minOccurs n, get_maxOccurs n) in
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| 372 |
match n#node_type with
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| 373 |
| T_element "xsd:element" when not (n#extension#has_attribute "ref") ->
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| 374 |
let name = n#extension#name in
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| 375 |
let type_def =
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| 376 |
(try
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| 377 |
S (parse_simple_type resolver (find_element "xsd:simpleType" n))
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| 378 |
with Not_found ->
|
| 379 |
(try
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| 380 |
C (parse_complex_type resolver (find_element "xsd:complexType" n))
|
| 381 |
with Not_found ->
|
| 382 |
!(resolver#resolve_typ n#extension#typ)))
|
| 383 |
in
|
| 384 |
minOccurs, maxOccurs, Elt (ref (name, ref type_def, None))
|
| 385 |
| T_element "xsd:element" when n#extension#has_attribute "ref" ->
|
| 386 |
let elt_decl = resolver#resolve_elt n#extension#ref in
|
| 387 |
minOccurs, maxOccurs, (Elt elt_decl)
|
| 388 |
| T_element "xsd:all" ->
|
| 389 |
minOccurs, maxOccurs,
|
| 390 |
All (List.map (parse_particle resolver) n#extension#find_terms)
|
| 391 |
| T_element "xsd:sequence" ->
|
| 392 |
minOccurs, maxOccurs,
|
| 393 |
Sequence (List.map (parse_particle resolver) n#extension#find_terms)
|
| 394 |
| T_element "xsd:choice" ->
|
| 395 |
minOccurs, maxOccurs,
|
| 396 |
Choice (List.map (parse_particle resolver) n#extension#find_terms)
|
| 397 |
| _ -> assert false
|
| 398 |
|
| 399 |
;;
|
| 400 |
|
| 401 |
module OrderedNode =
|
| 402 |
struct
|
| 403 |
type t = Schema_xml.schema_extension node
|
| 404 |
let compare = Pxp_document.compare
|
| 405 |
end
|
| 406 |
;;
|
| 407 |
module NodeSet = Set.Make (OrderedNode) ;;
|
| 408 |
|
| 409 |
(* lazy resolver: resolve types/elements/attributes as soon as it encounter
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| 410 |
references to them. DOESN'T WORK WITH RECURSIVE ENTITIES [ probably it loops ]
|
| 411 |
|
| 412 |
@param node schema document root node
|
| 413 |
*)
|
| 414 |
class lazy_resolver node =
|
| 415 |
object (self)
|
| 416 |
|
| 417 |
val typs = Hashtbl.create 17
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| 418 |
val attrs = Hashtbl.create 17
|
| 419 |
val elts = Hashtbl.create 17
|
| 420 |
|
| 421 |
val mutable seen_nodes = NodeSet.empty
|
| 422 |
|
| 423 |
initializer (* register built-in types *)
|
| 424 |
List.iter (fun name -> Hashtbl.add typs name (ref (S (SBuilt_in name))))
|
| 425 |
Schema_builtin.names
|
| 426 |
|
| 427 |
method already_seen n = NodeSet.mem n seen_nodes
|
| 428 |
|
| 429 |
method private register_typ' node name def =
|
| 430 |
if Hashtbl.mem typs name then
|
| 431 |
failwith ("Redefinition of type: " ^ name);
|
| 432 |
if debug then
|
| 433 |
(Format.fprintf Format.std_formatter
|
| 434 |
"\nSchema_parser: registering TYPE %s:\n%a\n"
|
| 435 |
name print_type !def;
|
| 436 |
Format.pp_print_flush Format.std_formatter ());
|
| 437 |
Hashtbl.add typs name def;
|
| 438 |
seen_nodes <- NodeSet.add node seen_nodes
|
| 439 |
|
| 440 |
method private register_elt' node name decl =
|
| 441 |
if Hashtbl.mem elts name then
|
| 442 |
failwith ("Redefinition of element: " ^ name);
|
| 443 |
if debug then
|
| 444 |
(Format.fprintf Format.std_formatter
|
| 445 |
"\nSchema_parser: registering ELEMENT %s:\n%a\n"
|
| 446 |
name print_elt_decl !decl;
|
| 447 |
Format.pp_print_flush Format.std_formatter ());
|
| 448 |
Hashtbl.add elts name decl;
|
| 449 |
seen_nodes <- NodeSet.add node seen_nodes
|
| 450 |
|
| 451 |
method private register_att' node name decl =
|
| 452 |
if Hashtbl.mem attrs name then
|
| 453 |
failwith ("Redefinition of attribute: " ^ name);
|
| 454 |
if debug then
|
| 455 |
(Format.fprintf Format.std_formatter
|
| 456 |
"\nSchema_parser: registering ATTRIBUTE %s:\n%a\n"
|
| 457 |
name print_att_decl !decl;
|
| 458 |
Format.pp_print_flush Format.std_formatter ());
|
| 459 |
Hashtbl.add attrs name decl;
|
| 460 |
seen_nodes <- NodeSet.add node seen_nodes
|
| 461 |
|
| 462 |
method register_simple_type n =
|
| 463 |
let st_def = parse_simple_type (self :> resolver) n in
|
| 464 |
self#register_typ' n n#extension#name (ref (S st_def))
|
| 465 |
|
| 466 |
method register_complex_type n =
|
| 467 |
let ct_def = parse_complex_type (self :> resolver) n in
|
| 468 |
self#register_typ' n n#extension#name (ref (C ct_def))
|
| 469 |
|
| 470 |
method register_elt n =
|
| 471 |
let elt_decl = parse_elt_decl (self :> resolver) n in
|
| 472 |
self#register_elt' n n#extension#name (ref elt_decl)
|
| 473 |
|
| 474 |
method type_defs = List.map (!) (hashtbl_values typs)
|
| 475 |
method att_decls = List.map (!) (hashtbl_values attrs)
|
| 476 |
method elt_decls = List.map (!) (hashtbl_values elts)
|
| 477 |
|
| 478 |
method resolve_typ name =
|
| 479 |
(try
|
| 480 |
Hashtbl.find typs name
|
| 481 |
with Not_found ->
|
| 482 |
(try
|
| 483 |
let node = node#extension#find_simpleType name in
|
| 484 |
let typ_def = ref (S (parse_simple_type (self :> resolver) node)) in
|
| 485 |
self#register_typ' node name typ_def;
|
| 486 |
typ_def
|
| 487 |
with Not_found ->
|
| 488 |
(try
|
| 489 |
let node = node#extension#find_complexType name in
|
| 490 |
let typ_def =
|
| 491 |
ref (C (parse_complex_type (self :> resolver) node))
|
| 492 |
in
|
| 493 |
self#register_typ' node name typ_def;
|
| 494 |
typ_def
|
| 495 |
with Not_found ->
|
| 496 |
failwith ("Can't find definition of type: " ^ name))))
|
| 497 |
|
| 498 |
method resolve_elt name =
|
| 499 |
(try
|
| 500 |
Hashtbl.find elts name
|
| 501 |
with Not_found ->
|
| 502 |
(try
|
| 503 |
let node = node#extension#find_global_element name in
|
| 504 |
let elt_decl = ref (parse_elt_decl (self :> resolver) node) in
|
| 505 |
self#register_elt' node name elt_decl;
|
| 506 |
elt_decl
|
| 507 |
with Not_found ->
|
| 508 |
failwith ("Can't find declaration of element: " ^ name)))
|
| 509 |
|
| 510 |
method resolve_att name =
|
| 511 |
(try
|
| 512 |
Hashtbl.find attrs name
|
| 513 |
with Not_found ->
|
| 514 |
(try
|
| 515 |
let node = node#extension#find_global_attribute name in
|
| 516 |
let att_decl = ref (parse_att_decl (self :> resolver) node) in
|
| 517 |
self#register_att' node name att_decl;
|
| 518 |
att_decl
|
| 519 |
with Not_found ->
|
| 520 |
failwith ("Can't find declaration of attribute: " ^ name)))
|
| 521 |
|
| 522 |
end
|
| 523 |
;;
|
| 524 |
|
| 525 |
let parse_schema doc =
|
| 526 |
let root = doc#root in
|
| 527 |
let resolver = new lazy_resolver root in
|
| 528 |
root#iter_nodes (fun n ->
|
| 529 |
if not (resolver#already_seen n) then
|
| 530 |
(match n#node_type with
|
| 531 |
| T_element "xsd:element" -> resolver#register_elt n
|
| 532 |
| T_element "xsd:simpleType" -> resolver#register_simple_type n
|
| 533 |
| T_element "xsd:complexType" -> resolver#register_complex_type n
|
| 534 |
| T_element e -> failwith ("Unexpected root element " ^ e)
|
| 535 |
| _ -> ()));
|
| 536 |
{
|
| 537 |
type_defs = resolver#type_defs;
|
| 538 |
att_decls = resolver#att_decls;
|
| 539 |
elt_decls = resolver#elt_decls;
|
| 540 |
}
|
| 541 |
;;
|
| 542 |
|
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