schema: Add tool to validate data against schema

This is a Java program that uses Apache Jena to do the validation. I've
not yet found a Python tool which provides equivalent functionality.

Change-Id: I2556387ae41f1c3f2160668eb14702df6016e729

2 files changed, 60 insertions, 0 deletions

diff --git a/schema/validate-jena/README b/schema/validate-jena/README
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+++ b/schema/validate-jena/README
@@ -0,0 +1,17 @@
+Validate RDF data according to a schema using Apache Jena
+---------------------------------------------------------
+
+To compile this you will need Apache Jena available, and a Java compiler.
+
+You can download a binary distribution of Apache Jena from
+<https://jena.apache.org/download/index.html>.
+
+Here is an example of fetching a version of Apache Jena, compiling the
+validation tool to a .class file with `javac` and running it with `java`:
+
+    wget http://mirrors.ukfast.co.uk/sites/ftp.apache.org/jena/binaries/apache-jena-2.13.0.tar.gz
+    tar xf apache-jena-2.13.0.tar.gz
+    javac -classpath ./apache-jena-2.13.0/lib/jena-core-2.13.0.jar \
+        ValidateTool.java
+    java -classpath ./apache-jena-2.13.0/lib/jena-core-2.13.0.jar:./apache-jena-2.13.0/lib/slf4j-api-1.7.6.jar:./apache-jena-2.13.0/lib/slf4j-log4j12-1.7.6.jar:./apache-jena-2.13.0/lib/log4j-1.2.17.jar:./apache-jena-2.13.0/lib/xercesImpl-2.11.0.jar:./apache-jena-2.13.0/lib/xml-apis-1.4.01.jar:./apache-jena-2.13.0/lib/jena-iri-1.1.2.jar:. \
+        ValidateTool
diff --git a/schema/validate-jena/ValidateTool.java b/schema/validate-jena/ValidateTool.java
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+++ b/schema/validate-jena/ValidateTool.java
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+/* Tool to validate Baserock definitions data against the OWL schema.
+ *
+ * Based in part on:
+ *
+ *    https://github.com/castagna/jena-examples/blob/master/src/main/java/org/apache/jena/examples/ExampleONT_02.java
+ */
+
+
+import java.util.Iterator;
+
+import com.hp.hpl.jena.rdf.model.InfModel;
+import com.hp.hpl.jena.rdf.model.Model;
+import com.hp.hpl.jena.rdf.model.ModelFactory;
+import com.hp.hpl.jena.reasoner.Reasoner;
+import com.hp.hpl.jena.reasoner.ReasonerRegistry;
+import com.hp.hpl.jena.reasoner.ValidityReport;
+import com.hp.hpl.jena.util.FileManager;
+
+
+public class ValidateTool {
+    public static void main(String[] args) {
+        Model data = FileManager.get().loadModel(
+                "../definitions.rdfxml", null, "RDF/XML");
+        Model schema = FileManager.get().loadModel(
+                "../baserock-example.schema", null, "Turtle");
+
+        Reasoner reasoner = ReasonerRegistry.getOWLReasoner();
+        reasoner = reasoner.bindSchema(schema.getGraph());
+
+        InfModel infmodel = ModelFactory.createInfModel(reasoner, data);
+
+        ValidityReport validity = infmodel.validate();
+
+        if (validity.isValid()) {
+            System.out.println("OK");
+        } else {
+            System.out.println("Conflicts");
+            for (Iterator i = validity.getReports(); i.hasNext(); ) {
+                System.out.println(" - " + i.next());
+            }
+        }
+    }
+}