Added JSON-LD writer via rdfxml2json-ld.xsl

AtomGraph · May 21, 2015 · f28389e · f28389e
1 parent 8c969ae
commit f28389e
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Showing 3 changed files with 23 additions and 9 deletions.
diff --git a/pom.xml b/pom.xml
@@ -75,7 +75,7 @@
             <groupId>${project.groupId}</groupId>
             <artifactId>processor</artifactId>
             <version>${project.version}</version>
-        </dependency>        
+        </dependency>
     </dependencies>
 
     <build>

diff --git a/src/main/java/org/graphity/client/ApplicationBase.java b/src/main/java/org/graphity/client/ApplicationBase.java
@@ -20,12 +20,19 @@
 import com.hp.hpl.jena.query.ARQ;
 import com.hp.hpl.jena.util.FileManager;
 import com.hp.hpl.jena.util.LocationMapper;
+import java.io.FileNotFoundException;
+import java.net.MalformedURLException;
+import java.net.URISyntaxException;
+import java.net.URL;
 import java.util.HashSet;
 import java.util.Set;
 import javax.annotation.PostConstruct;
 import javax.servlet.ServletConfig;
 import javax.ws.rs.core.Context;
 import javax.ws.rs.core.UriInfo;
+import javax.xml.transform.Source;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.stream.StreamSource;
 import org.graphity.client.locator.PrefixMapper;
 import org.graphity.client.model.impl.GlobalResourceBase;
 import org.graphity.client.provider.DataManagerProvider;
@@ -36,6 +43,8 @@
 import org.graphity.core.provider.ResultSetWriter;
 import org.graphity.core.provider.UpdateRequestReader;
 import org.graphity.client.util.DataManager;
+import org.graphity.client.writer.xslt.JSONLDWriter;
+import org.graphity.core.riot.RDFLanguages;
 import org.graphity.processor.mapper.ConstraintViolationExceptionMapper;
 import org.graphity.processor.mapper.NotFoundExceptionMapper;
 import org.graphity.processor.provider.GraphStoreOriginProvider;
@@ -141,11 +150,11 @@ public void init()
         OntDocumentManager.getInstance().setCacheModels(true); // lets cache the ontologies FTW!!
 	if (log.isDebugEnabled()) log.debug("OntDocumentManager.getInstance().getFileManager(): {}", OntDocumentManager.getInstance().getFileManager());
 
-        /*
 	try
 	{
-	    singletons.add(new JSONLDWriter(XSLTBuilder.fromStylesheet(getSource("/static/org/graphity/client/xsl/rdfxml2json-ld.xsl")).
-		resolver(DataManager.get()))); // writes JSON-LD responses
+	    singletons.add(new JSONLDWriter(getSource("/static/org/graphity/client/xsl/rdfxml2json-ld.xsl")));
+            // add RDF/POST serialization. It will support JSON-LD during conneg, even though it's a JAX-RS and not Jena writer
+            RDFLanguages.register(RDFLanguages.JSONLD) ;            
 	}
 	catch (TransformerConfigurationException ex)
 	{
@@ -163,7 +172,6 @@ public void init()
 	{
 	    if (log.isErrorEnabled()) log.error("XSLT stylesheet URL error", ex);
 	}
-        */
     }
 
     /**
@@ -201,17 +209,14 @@ public Set<Object> getSingletons()
      * @throws java.net.MalformedURLException 
      * @see <a href="http://docs.oracle.com/javase/6/docs/api/javax/xml/transform/Source.html">Source</a>
      */
-    /*
     public Source getSource(String filename) throws FileNotFoundException, URISyntaxException, MalformedURLException
     {
-	if (log.isDebugEnabled()) log.debug("Resource paths used to load Source: {} from filename: {}", getServletConfig().getResourcePaths("/"), filename);
 	URL xsltUrl = getServletConfig().getServletContext().getResource(filename);
 	if (xsltUrl == null) throw new FileNotFoundException("File '" + filename + "' not found");
 	String xsltUri = xsltUrl.toURI().toString();
 	if (log.isDebugEnabled()) log.debug("XSLT stylesheet URI: {}", xsltUri);
 	return new StreamSource(xsltUri);
     }
-    */
 
     /**
      * Returns URI information

diff --git a/src/main/java/org/graphity/client/writer/xslt/JSONLDWriter.java b/src/main/java/org/graphity/client/writer/xslt/JSONLDWriter.java
@@ -19,7 +19,11 @@
 import com.sun.jersey.spi.resource.Singleton;
 import javax.ws.rs.Produces;
 import javax.ws.rs.ext.Provider;
+import javax.xml.transform.Source;
 import javax.xml.transform.Templates;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.sax.SAXTransformerFactory;
 import org.graphity.client.writer.ModelXSLTWriter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -32,11 +36,16 @@
  */
 @Provider
 @Singleton
-@Produces("application/ld+json")
+@Produces(org.graphity.core.MediaType.APPLICATION_LD_JSON)
 public class JSONLDWriter extends ModelXSLTWriter
 {
     private static final Logger log = LoggerFactory.getLogger(JSONLDWriter.class);
 
+    public JSONLDWriter(Source stylesheet) throws TransformerConfigurationException
+    {
+        this(((SAXTransformerFactory)TransformerFactory.newInstance()).newTemplates(stylesheet));
+    }
+
     public JSONLDWriter(Templates templates)
     {
 	super(templates);