Author: lgiessmann Date: Thu Dec 10 08:00:55 2009 New Revision: 167

Log: added a restful handler that is able to export TM-Fragments as RDF/XML

Modified: trunk/src/rest_interface/set-up-json-interface.lisp trunk/src/unit_tests/reification_test.lisp trunk/src/xml/rdf/exporter.lisp

Modified: trunk/src/rest_interface/set-up-json-interface.lisp ============================================================================== --- trunk/src/rest_interface/set-up-json-interface.lisp (original) +++ trunk/src/rest_interface/set-up-json-interface.lisp Thu Dec 10 08:00:55 2009 @@ -9,7 +9,8 @@

(in-package :rest-interface)

-(defparameter *json-get-prefix* "/json/get/(.+)$") ;the prefix to get a fragment by the psis -> localhost:8000/json/get/<fragment-psi> +(defparameter *json-get-prefix* "/json/get/(.+)$") ;the prefix to get a fragment by the psi -> localhost:8000/json/get/<fragment-psi> +(defparameter *json-get-rdf-prefix* "/json/get/rdf/(.+)$") ;the prefix to get a fragment by the psi -> localhost:8000/json/rdf/get/<fragment-psi> (defparameter *json-commit-url* "/json/commit/?$") ;the url to commit a json fragment by "put" or "post" (defparameter *json-get-all-psis* "/json/psis/?$") ;the url to get all topic psis of isidorus -> localhost:8000/json/psis (defparameter *json-get-summary-url* "/json/summary/?$") ;the url to get a summary of all topic stored in isidorus; you have to set the GET-parameter "start" for the start index of all topics within elephant and the GET-paramter "end" for the last index of the topic sequence -> http://localhost:8000/json/summary/?start=12&end=13 @@ -27,6 +28,7 @@ (defparameter *ajax-javascript-url-prefix* "/javascripts") ; the url prefix of all javascript files

(defun set-up-json-interface (&key (json-get-prefix *json-get-prefix*) + (json-get-rdf-prefix *json-get-rdf-prefix*) (json-get-all-psis *json-get-all-psis*) (json-commit-url *json-commit-url*) (json-get-summary-url *json-get-summary-url*) @@ -80,6 +82,9 @@ (create-regex-dispatcher json-get-prefix #'return-json-fragment) hunchentoot:*dispatch-table*) (push + (create-regex-dispatcher json-get-rdf-prefix #'return-json-rdf-fragment) + hunchentoot:*dispatch-table*) + (push (create-regex-dispatcher json-get-topic-stub-prefix #'return-topic-stub-of-psi) hunchentoot:*dispatch-table*) (push @@ -238,6 +243,31 @@ (setf (hunchentoot:return-code*) hunchentoot:+http-bad-request+))))

+(defun return-json-rdf-fragment(&optional psi) + "returns the json-fragmen belonging to the psi passed by the parameter psi" + (assert psi) + (let ((http-method (hunchentoot:request-method*))) + (if (eq http-method :GET) + (let ((identifier (string-replace psi "%23" "#"))) + (setf (hunchentoot:content-type*) "application/json") ;RFC 4627 + (let ((fragment + (with-writer-lock + (create-latest-fragment-of-topic identifier)))) + (if fragment + (handler-case (with-reader-lock + (rdf-exporter:to-rdf-string fragment)) + (condition (err) + (progn + (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) + (setf (hunchentoot:content-type*) "text") + (format nil "Condition: "~a"" err)))) + (progn + (setf (hunchentoot:return-code*) hunchentoot:+http-not-found+) + (setf (hunchentoot:content-type*) "text") + (format nil "Topic "~a" not found" psi))))) + (setf (hunchentoot:return-code*) hunchentoot:+http-bad-request+)))) + + (defun json-commit(&optional param) "calls the json-to-elem method for a json-fragment and imports it to elephant" (declare (ignorable param)) ;param is currently not used

Modified: trunk/src/unit_tests/reification_test.lisp ============================================================================== --- trunk/src/unit_tests/reification_test.lisp (original) +++ trunk/src/unit_tests/reification_test.lisp Thu Dec 10 08:00:55 2009 @@ -1005,11 +1005,6 @@ (elephant:close-store))

-;;TODO: check merge-reifier-topics (--> versioning) -;;TODO: extend the fragment-importer in the RESTful-interface -;;TODO: DOKU - - (defun run-reification-tests () (it.bese.fiveam:run! 'test-merge-reifier-topics) (it.bese.fiveam:run! 'test-xtm1.0-reification)

Modified: trunk/src/xml/rdf/exporter.lisp ============================================================================== --- trunk/src/xml/rdf/exporter.lisp (original) +++ trunk/src/xml/rdf/exporter.lisp Thu Dec 10 08:00:55 2009 @@ -31,7 +31,8 @@ (:import-from :isidorus-threading with-reader-lock with-writer-lock) - (:export :export-rdf)) + (:export :export-rdf + :to-rdf-string))

(in-package :rdf-exporter)

@@ -356,39 +357,7 @@ (xml-lang-p construct))) nil ;; do not export this topic explicitly, since it has been exported as ;; rdf:resource, property or any other reference - (cxml:with-element "rdf:Description" - (let ((psi (get-reifier-psi construct)) - (ii (item-identifiers construct)) - (sl (locators construct)) - (t-names (names construct)) - (t-occs (occurrences construct)) - (t-assocs (list-rdf-mapped-associations construct))) - (if psi - (if (reified construct) - (let ((reifier-uri (get-reifier-uri construct))) - (if reifier-uri - (cxml:attribute "rdf:about" (concatenate 'string "#" (get-reifier-uri construct))) - (cxml:attribute "rdf:about" (uri psi)))) - (cxml:attribute "rdf:about" (uri psi))) - (cxml:attribute "rdf:nodeID" (make-object-id construct))) - (when (or (> (length (psis construct)) 1) - ii sl t-names - (isi-occurrence-p construct)) - (make-isi-type *tm2rdf-topic-type-uri*)) - (map 'list #'to-rdf-elem (remove psi (psis construct))) - (map 'list #'to-rdf-elem sl) - (map 'list #'to-rdf-elem ii) - (map 'list #'(lambda(x) - (cxml:with-element "rdf:type" - (make-topic-reference x))) - (list-instanceOf construct)) - (map 'list #'(lambda(x) - (cxml:with-element "rdfs:subClassOf" - (make-topic-reference x))) - (list-super-types construct)) - (map 'list #'to-rdf-elem t-names) - (map 'list #'to-rdf-elem (sort-constructs - (union t-occs t-assocs))))))) + (topic-to-rdf-elem construct)))

(defun sort-constructs (constructs) @@ -594,4 +563,86 @@ (< slash-position (- (length (uri psi)) 1)))) psi nil))) - (psis topic))) \ No newline at end of file + (psis topic))) + + +(defmethod to-rdf-elem ((construct FragmentC)) + "Exports TM-Fragments as RDF/XML data." + (topic-to-rdf-elem (topic construct)) + ;all stubs are exported implicitely by references of the topic or associations + (map 'list #'to-rdf-elem (intersection (list-tm-associations) (associations construct)))) + + +(defun topic-to-rdf-elem (construct) + "Creates a node that describes a TM topic. The passed topic is exported + explicitely, although it was exported as a resource-reference." + (declare (TopicC construct)) + (cxml:with-element "rdf:Description" + (let ((psi (get-reifier-psi construct)) + (ii (item-identifiers construct)) + (sl (locators construct)) + (t-names (names construct)) + (t-occs (occurrences construct)) + (t-assocs (list-rdf-mapped-associations construct))) + (if psi + (if (reified construct) + (let ((reifier-uri (get-reifier-uri construct))) + (if reifier-uri + (cxml:attribute "rdf:about" (concatenate 'string "#" (get-reifier-uri construct))) + (cxml:attribute "rdf:about" (uri psi)))) + (cxml:attribute "rdf:about" (uri psi))) + (cxml:attribute "rdf:nodeID" (make-object-id construct))) + (when (or (> (length (psis construct)) 1) + ii sl t-names + (isi-occurrence-p construct)) + (make-isi-type *tm2rdf-topic-type-uri*)) + (map 'list #'to-rdf-elem (remove psi (psis construct))) + (map 'list #'to-rdf-elem sl) + (map 'list #'to-rdf-elem ii) + (map 'list #'(lambda(x) + (cxml:with-element "rdf:type" + (make-topic-reference x))) + (list-instanceOf construct)) + (map 'list #'(lambda(x) + (cxml:with-element "rdfs:subClassOf" + (make-topic-reference x))) + (list-super-types construct)) + (map 'list #'to-rdf-elem t-names) + (map 'list #'to-rdf-elem (sort-constructs + (union t-occs t-assocs)))))) + + +(defgeneric to-rdf-string (construct) + (:documentation "Prints the string representation of a Fragment element as RDF/XML")) + + +(defmethod to-rdf-string ((construct FragmentC)) + "Exports a FragmentC object as a string in RDF/XML representation." + (init-*ns-map*) + (let ((str + (cxml:with-xml-output (cxml:make-string-sink :indentation 2 :canonical nil) + (cxml:with-namespace ("isi" *tm2rdf-ns*) + (cxml:with-namespace ("rdf" *rdf-ns*) + (cxml:with-namespace ("rdfs" *rdfs-ns*) + (cxml:with-namespace ("xml" *xml-ns*) + (cxml:with-element "rdf:RDF" + (to-rdf-elem construct))))))))) + (setf *ns-map* nil) + str)) + + +(defmethod to-rdf-string ((construct TopicMapConstructC)) + "Exports a TopicMapConstructC object as a string in RDF/XML representation." + (init-*ns-map*) + (let ((str + (cxml:with-xml-output (cxml:make-string-sink :indentation 2 :canonical nil) + (cxml:with-namespace ("isi" *tm2rdf-ns*) + (cxml:with-namespace ("rdf" *rdf-ns*) + (cxml:with-namespace ("rdfs" *rdfs-ns*) + (cxml:with-namespace ("xml" *xml-ns*) + (cxml:with-element "rdf:RDF" + (to-rdf-elem construct))))))))) + (setf *ns-map* nil) + str)) + +