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values.clj
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values.clj
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;; Copyright (C) 2014 Paula Gearon
;; Copyright (C) 2014 Clark & Parsia
;;
;; Licensed under the Apache License, Version 2.0 (the "License");
;; you may not use this file except in compliance with the License.
;; You may obtain a copy of the License at
;;
;; http://www.apache.org/licenses/LICENSE-2.0
;;
;; Unless required by applicable law or agreed to in writing, software
;; distributed under the License is distributed on an "AS IS" BASIS,
;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;; See the License for the specific language governing permissions and
;; limitations under the License.
(ns stardog.values
(:import [com.stardog.stark IRI Literal BNode Values Datatype]
[com.stardog.stark.impl IRIImpl TypedLiteral BooleanLiteral LanguageLiteral]
[java.util Date GregorianCalendar UUID Map]
[javax.xml.datatype DatatypeConfigurationException DatatypeFactory XMLGregorianCalendar]))
(defmulti typed-value (fn [^Literal v] (.. v datatype toString)))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#integer"
[^Literal v] (Literal/intValue v))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#int"
[^Literal v] (Literal/intValue v))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#boolean"
[^Literal v] (Literal/booleanValue v))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#byte"
[^Literal v] (Literal/byteValue v))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#dateTime"
[^Literal v] (.. v calendarValue toGregorianCalendar getTime))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#time"
[^Literal v] (.. v calendarValue toGregorianCalendar getTime))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#date"
[^Literal v] (.. v calendarValue toGregorianCalendar getTime))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#gYearMonth"
[^Literal v] (.. v calendarValue toGregorianCalendar getTime))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#gMonthYear"
[^Literal v] (.. v calendarValue toGregorianCalendar getTime))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#gYear"
[^Literal v] (.. v calendarValue toGregorianCalendar getTime))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#gMonth"
[^Literal v] (.. v calendarValue toGregorianCalendar getTime))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#gDay"
[^Literal v] (.. v calendarValue toGregorianCalendar getTime))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#decimal"
[^Literal v] (Literal/decimalValue v))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#double"
[^Literal v] (Literal/doubleValue v))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#float"
[^Literal v] (Literal/floatValue v))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#long"
[^Literal v] (Literal/longValue v))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#short"
[^Literal v] (Literal/shortValue v))
(defmethod typed-value "http://www.w3.org/2001/XMLSchema#string"
[^Literal v] (.label v))
(defmethod typed-value :default
[^Literal v]
(let [label (.label v)]
(if-let [lang (.lang v)]
{:lang lang :value label}
(if-let [dt (.datatype v)]
{:datatype dt :value label}
label))))
(defprotocol URIType
(to-uri [u] "Converts to an internal URI type"))
(extend-protocol URIType
nil
(to-uri [u] u)
String
(to-uri [u] (IRIImpl. u))
java.net.URI
(to-uri [u] (IRIImpl. (str u)))
java.net.URL
(to-uri [u] (IRIImpl. (str u)))
IRI
(to-uri [u] u))
(defprotocol RDFConverter
(convert [v] "Converts standard Clojure types to corresponding literals"))
(extend-protocol RDFConverter
nil
(convert [v] v)
java.util.Date
(convert [v] (let [g (doto (GregorianCalendar.) (.setTime v))]
(-> (DatatypeFactory/newInstance)
(.newXMLGregorianCalendar g)
(Values/literal))))
GregorianCalendar
(convert [v] (-> (DatatypeFactory/newInstance)
(.newXMLGregorianCalendar v)
(Values/literal)))
java.net.URI
(convert [v] (to-uri v))
java.net.URL
(convert [v] (to-uri v))
UUID
(convert [v] (to-uri (str "urn:uuid:" v)))
Boolean
(convert [v] (if v BooleanLiteral/TRUE BooleanLiteral/FALSE))
Byte
(convert [v] (Values/literal (byte v)))
Short
(convert [v] (Values/literal (short v)))
Float
(convert [v] (Values/literal (float v)))
Double
(convert [v] (Values/literal (double v)))
Integer
(convert [v] (Values/literal (int v)))
Long
(convert [v] (Values/literal (long v)))
BigInteger
(convert [v] (Values/literal (biginteger v)))
BigDecimal
(convert [v] (Values/literal (bigdec v)))
String
(convert [v] (Values/literal v))
Map
(convert [{:keys [^String value ^String lang datatype]}]
(cond lang (LanguageLiteral. value lang)
datatype (TypedLiteral. value (Datatype/of (to-uri datatype)))
:default (TypedLiteral. value Datatype/UDF))))
(defprotocol ClojureConverter
(standardize [v] "Standardizes a value into something Idiomatic for Clojure"))
(extend-protocol ClojureConverter
IRI
(standardize [v] (let [u (str v)]
(if (.startsWith u "urn:uuid:")
(UUID/fromString (subs u 9))
(java.net.URI. u))))
Literal
(standardize [v] (typed-value v))
BNode
(standardize [v] (keyword "_" (str "b" (.getID v)))))
(defn as-uri
"Create a URI from a String"
^String
[input]
(java.net.URI. input))