Author: lgiessmann Date: Thu Aug 27 05:10:55 2009 New Revision: 121

Log: rdf-exporter: changed the handling of associations that were mapped from rdf->tm, thus currently the rdf-mapped associatons are exported directly as rdf-property within an rdf-resource-node. rdf:_n is transformed to rdf:li, therefor associations rdf-mapped-associations and occurrences that will be mapped as usual rdf-properties are sorted by there type-psi; note all unit tests has to be updated, since the exported dom has a different structure

Modified: trunk/src/xml/rdf/exporter.lisp

Modified: trunk/src/xml/rdf/exporter.lisp ============================================================================== --- trunk/src/xml/rdf/exporter.lisp (original) +++ trunk/src/xml/rdf/exporter.lisp Thu Aug 27 05:10:55 2009 @@ -24,23 +24,54 @@ (:import-from :isidorus-threading with-reader-lock with-writer-lock) - (:import-from :exporter - *export-tm* - export-to-elem) (:export :export-rdf))

(in-package :rdf-exporter)

+(defvar *export-tm* nil "TopicMap which is exported (nil if all is + to be exported, the same mechanism as + in xtm-exporter") + (defvar *ns-map* nil) ;; ((:prefix <string> :uri <string>))

+(defun rdf-li-or-uri (uri) + "Returns a string which represents an URI. If the given URI is + of the type rdf:_n there will be returned rdf:li." + (let ((rdf-len (length *rdf-ns*))) + (let ((prep-uri (when (string-starts-with + uri (concatenate 'string *rdf-ns* "_")) + (subseq uri (+ rdf-len 1))))) + (if prep-uri + (handler-case (progn + (parse-integer prep-uri) + (concatenate 'string *rdf-ns* "li")) + (condition () uri)) + uri)))) + + +(defun init-*ns-map* () + "Initializes the variable *ns-map* woith some prefixes and corresponding + namepsaces. So the predifend namespaces are not contain ed twice." + (setf *ns-map* (list + (list :prefix "isi" + :uri *tm2rdf-ns*) + (list :prefix "rdf" + :uri *rdf-ns*) + (list :prefix "rdfs" + :uri *rdfs-ns*) + (list :prefix "xml" + :uri *xml-ns*)))) + + (defmacro with-property (construct &body body) "Generates a property element with a corresponding namespace and tag name before executing the body. This macro is for usin in occurrences and association that are mapped to RDF properties." `(let ((ns-list - (separate-uri (uri (first (psis (instance-of ,construct))))))) + (separate-uri (rdf-li-or-uri + (uri (first (psis (instance-of ,construct)))))))) (declare ((or OccurrenceC AssociationC) ,construct)) (let ((ns (getf ns-list :prefix)) (tag-name (getf ns-list :suffix))) @@ -50,12 +81,34 @@ ,@body)))))

+(defmacro export-to-elem (tm to-elem) + "Exports all topics and associations depending to the given + tm. If tm is nil all topics and associations are exported. + Thic macro is equal to the one in xtm-exporter with a different + handler for associations." + `(setf *export-tm* ,tm) + `(format t "*export-tm*: ~a" *export-tm*) + `(map 'list + ,to-elem + (remove-if + #'null + (map 'list + #'(lambda(top) + (d:find-item-by-revision top revision)) + (if ,tm + (union + (d:topics ,tm) (d:associations ,tm)) + (union + (elephant:get-instances-by-class 'd:TopicC) + (list-tm-associations))))))) + + (defun export-rdf (rdf-path &key tm-id (revision (get-revision))) "Exports the topoic map bound to tm-id as RDF." (with-reader-lock (let ((tm (when tm-id (get-item-by-item-identifier tm-id :revision revision)))) - (setf *ns-map* nil) + (init-*ns-map*) (setf *export-tm* tm) (with-revision revision (with-open-file (stream rdf-path :direction :output) @@ -288,7 +341,8 @@ (ii (item-identifiers construct)) (sl (locators construct)) (t-names (names construct)) - (t-occs (occurrences construct))) + (t-occs (occurrences construct)) + (t-assocs (list-rdf-mapped-associations construct))) (if psi (cxml:attribute "rdf:about" (uri psi)) (cxml:attribute "rdf:nodeID" (make-object-id construct))) @@ -308,7 +362,20 @@ (make-topic-reference x))) (list-super-types construct)) (map 'list #'to-rdf-elem t-names) - (map 'list #'to-rdf-elem t-occs))))) + (map 'list #'to-rdf-elem (sort-constructs + (union t-occs t-assocs))))))) + + +(defun sort-constructs (constructs) + "Sorts names and associations by the instance-of name. + So rdf:_n can be exported in the correct order." + (sort constructs #'(lambda(x y) + (declare ((or OccurrenceC AssociationC) x y)) + (let ((x-psi (when (psis (instance-of x)) + (uri (first (psis (instance-of x)))))) + (y-psi (when (psis (instance-of y)) + (uri (first (psis (instance-of y))))))) + (string< x-psi y-psi)))))

(defmethod to-rdf-elem ((construct AssociationC)) @@ -387,12 +454,52 @@ association-roles))) (when (and subject-role object-role (= (length association-roles) 2)) - (cxml:with-element "rdf:Description" - (let ((psi (when (psis (player subject-role)) - (first (psis (player subject-role)))))) - (if psi - (cxml:attribute "rdf:about" (uri psi)) - (cxml:attribute "rdf:nodeID" - (make-object-id (player subject-role)))) - (with-property association - (make-topic-reference (player object-role))))))))) \ No newline at end of file + (with-property association + (make-topic-reference (player object-role))))))) + + +(defun list-rdf-mapped-associations(subject-topic) + "Returns all associations that were mapped from RDF to TM + and are still having two roles of the type isi:subject and + isi:object." + (declare (TopicC subject-topic)) + (let ((isi-subject (get-item-by-psi *rdf2tm-subject*)) + (isi-object (get-item-by-psi *rdf2tm-object*))) + (let ((topic-roles + (remove-if + #'null + (map 'list + #'(lambda(x) + (when (and (eql (instance-of x) isi-subject) + (= (length (roles (parent x))) 2) + (find-if #'(lambda(y) + (eql (instance-of y) isi-object)) + (roles (parent x)))) + x)) + (player-in-roles subject-topic))))) + (map 'list #'parent topic-roles)))) + + +(defun list-tm-associations() + "Returns a list of associations that were not mapped from RDF + and are not of the type type-instance or supertype-subtype." + (let ((isi-subject (get-item-by-psi *rdf2tm-subject*)) + (isi-object (get-item-by-psi *rdf2tm-object*)) + (type-instance (get-item-by-psi *type-instance-psi*)) + (supertype-subtype (get-item-by-psi *supertype-subtype-psi*))) + (remove-if + #'null + (map 'list + #'(lambda(x) + (when (and + (not (or (eql (instance-of x) type-instance) + (eql (instance-of x) supertype-subtype))) + (or (/= (length (roles x)) 2) + (not (find-if #'(lambda(y) + (eql (instance-of y) isi-object)) + (roles x))) + (not (find-if #'(lambda(y) + (eql (instance-of y) isi-subject)) + (roles x))))) + x)) + (elephant:get-instances-by-class 'AssociationC))))) \ No newline at end of file