/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.jena.fuseki.mgt;
import java.util.List ;
import javax.servlet.http.HttpServletRequest ;
import javax.servlet.http.HttpSession ;
import org.apache.jena.atlas.io.IndentedLineBuffer ;
import org.apache.jena.atlas.iterator.Iter ;
import org.apache.jena.fuseki.Fuseki ;
import org.apache.jena.fuseki.server.DatasetRef ;
import org.apache.jena.fuseki.server.DatasetRegistry ;
import org.apache.jena.fuseki.server.ServiceRef ;
import com.hp.hpl.jena.shared.PrefixMapping ;
import com.hp.hpl.jena.sparql.core.DatasetGraph ;
import com.hp.hpl.jena.sparql.core.Prologue ;
import com.hp.hpl.jena.sparql.serializer.PrologueSerializer ;
import com.hp.hpl.jena.tdb.store.DatasetGraphTDB ;
/** Avoid code in JSPs */
public class MgtFunctions
{
/** Return the name of the current dataset */
public static String dataset(HttpServletRequest request, String dftValue)
{
String ds = dataset(request) ;
if ( ds == null )
return dftValue ;
return ds ;
}
/** Return the name of the current dataset */
public static String dataset(HttpServletRequest request)
{
HttpSession session = request.getSession(false) ;
if ( session == null )
return "No session";
String ds = (String)session.getAttribute("dataset") ;
return ds ;
}
/** Return the dataset description reference for currnet dataset */
public static DatasetRef datasetDesc(HttpServletRequest request)
{
HttpSession session = request.getSession(false) ;
if ( session == null )
return null ;
String ds = (String)session.getAttribute("dataset") ;
return DatasetRegistry.get().get(ds) ;
}
/** Return lists of datasets */
public static List<String> datasets(HttpServletRequest request)
{
return Iter.toList(DatasetRegistry.get().keys()) ;
}
/** Return name of */
public static String actionDataset(HttpServletRequest request)
{
return PageNames.actionDatasetNames ;
}
// Service name getters ...
/** Return a SPARQL query service name for the dataset */
public static String serviceQuery(String dataset)
{
String dft = "sparql" ;
DatasetRef ref = getFromRegistry(dataset) ;
if ( ref == null )
return dft ;
return serviceNameOrDefault(ref.query, dft) ;
}
/** Return a SPARQL update service name for the dataset */
public static String serviceUpdate(String dataset)
{
String dft = "update" ;
DatasetRef ref = getFromRegistry(dataset) ;
if ( ref == null )
return dft ;
return serviceNameOrDefault(ref.update, dft) ;
}
/** Return a SPARQL upload service name for the dataset */
public static String serviceUpload(String dataset)
{
String dft = "upload" ;
DatasetRef ref = getFromRegistry(dataset) ;
if ( ref == null )
return dft ;
return serviceNameOrDefault(ref.upload, dft) ;
}
/** Return a SPARQL Graph Store Protocol (Read) service name for the dataset */
public static String serviceGraphRead(String dataset)
{
String dft = "get" ;
DatasetRef ref = getFromRegistry(dataset) ;
if ( ref == null )
return dft ;
return serviceNameOrDefault(ref.readGraphStore, dft) ;
}
/** Return a SPARQL Graph Store Protocol (Read-Write) service name for the dataset */
public static String serviceGraphReadWrite(String dataset)
{
String dft = "data" ;
DatasetRef ref = getFromRegistry(dataset) ;
if ( ref == null )
return dft ;
return serviceNameOrDefault(ref.readWriteGraphStore, dft) ;
}
private static DatasetRef getFromRegistry(String dataset)
{
DatasetRegistry registry = DatasetRegistry.get() ;
if ( registry == null )
{
Fuseki.serverLog.warn("No dataset registry") ;
return null ;
}
DatasetRef ref = registry.get(dataset) ;
if ( ref == null )
Fuseki.serverLog.warn("Dataset not found: "+dataset) ;
return ref ;
}
private static String serviceNameOrDefault(ServiceRef service, String defaultValue)
{
if ( service.endpoints.isEmpty() )
return defaultValue ;
String x = service.endpoints.get(0) ;
if ( x.startsWith("/") )
x = x.substring(1) ;
return x ;
}
/** Return prefixes for the datasets, SPARQL syntax. */
public static String prefixes(HttpServletRequest request)
{
String dsName = dataset(request) ;
DatasetRef desc = getFromRegistry(dsName) ;
if ( desc == null )
return "<not found>" ;
DatasetGraph dsg = desc.dataset ;
if ( dsg instanceof DatasetGraphTDB )
{
PrefixMapping pmap = ((DatasetGraphTDB)dsg).getPrefixes().getPrefixMapping() ;
Prologue prologue = new Prologue(pmap) ;
IndentedLineBuffer buff = new IndentedLineBuffer() ;
PrologueSerializer.output(buff, prologue) ;
buff.append("\n") ;
return buff.asString() ;
}
return "" ;
}
}