[Upd] Fixed initial implementation

s-pipes-core/src/main/java/cz/cvut/spipes/modules/RetrievePrefixesModule.java

@@ -0,0 +1,61 @@
+package cz.cvut.spipes.modules;
+
+import cz.cvut.spipes.constants.KBSS_MODULE;
+import cz.cvut.spipes.engine.ExecutionContext;
+import cz.cvut.spipes.engine.ExecutionContextFactory;
+import cz.cvut.spipes.manager.OntoDocManager;
+import cz.cvut.spipes.manager.OntologyDocumentManager;
+import org.apache.jena.assembler.JA;
+import org.apache.jena.rdf.model.Model;
+import org.apache.jena.rdf.model.ModelFactory;
+import org.apache.jena.rdf.model.Resource;
+import org.apache.jena.vocabulary.RDF;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class RetrievePrefixesModule extends AbstractModule {
+    private static final Logger LOG = LoggerFactory.getLogger(RetrievePrefixesModule.class.getName());
+
+    private static String TYPE_URI = KBSS_MODULE.getURI() + "retrieve-prefixes";
+
+    //TODO refactor -> should be part of execution context
+    OntologyDocumentManager ontologyDocumentManager = OntoDocManager.getInstance();
+
+    @Override
+    ExecutionContext executeSelf() {
+        Model outputModel = ModelFactory.createDefaultModel();
+
+        for (String ontologyUri : ontologyDocumentManager.getRegisteredOntologyUris()) {
+
+            Resource ontology = outputModel.createResource(ontologyUri);
+
+            ontologyDocumentManager.getOntology(ontologyUri).getNsPrefixMap().forEach((key, value) -> {
+                Resource singlePrefixMapping = outputModel.createResource();
+
+                outputModel.add(ontology, JA.prefixMapping, singlePrefixMapping);
+
+                outputModel.add(
+                    singlePrefixMapping, RDF.type, JA.SinglePrefixMapping
+                );
+                outputModel.add(
+                    singlePrefixMapping, JA.prefix, key
+                );
+                outputModel.add(
+                    singlePrefixMapping, JA.namespace, value
+                );
+            });
+        }
+
+        return ExecutionContextFactory.createContext(outputModel);
+
+    }
+
+    @Override
+    public String getTypeURI() {
+        return TYPE_URI;
+    }
+
+    @Override
+    public void loadConfiguration() {
+    }
+}

s-pipes-core/src/test/java/cz/cvut/spipes/modules/RetrievePrefixesModuleTest.java

@@ -0,0 +1,30 @@
+package cz.cvut.spipes.modules;
+
+import cz.cvut.spipes.engine.ExecutionContext;
+import cz.cvut.spipes.engine.ExecutionContextFactory;
+import cz.cvut.spipes.manager.OntoDocManager;
+import cz.cvut.spipes.manager.OntologyDocumentManager;
+import org.apache.jena.util.FileUtils;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+class RetrievePrefixesModuleTest {
+
+    @Disabled
+    @Test
+    void testGetPrefixesFromFile() {
+        ExecutionContext inputExecutionContext = ExecutionContextFactory.createEmptyContext();
+        OntologyDocumentManager ontDocManager = OntoDocManager.getInstance();
+        Path ontologiesDir = Paths.get("/home/blcha/projects/kbss/git/s-pipes/s-pipes-core/src/test/resources/manager");
+        ontDocManager.registerDocuments(ontologiesDir);
+
+        RetrievePrefixesModule retrievePrefixesModule = new RetrievePrefixesModule();
+        retrievePrefixesModule.setInputContext(inputExecutionContext);
+        ExecutionContext outputExecutionContext = retrievePrefixesModule.executeSelf();
+
+        outputExecutionContext.getDefaultModel().write(System.out, FileUtils.langTurtle, null);
+    }
+}