/* | |
* 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 | |
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*/ | |
package tdb.examples; | |
import org.apache.jena.riot.RDFDataMgr ; | |
import com.hp.hpl.jena.assembler.Assembler ; | |
import com.hp.hpl.jena.query.Dataset ; | |
import com.hp.hpl.jena.rdf.model.Model ; | |
import com.hp.hpl.jena.rdf.model.Resource ; | |
import com.hp.hpl.jena.shared.JenaException ; | |
import com.hp.hpl.jena.sparql.core.assembler.DatasetAssemblerVocab ; | |
import com.hp.hpl.jena.sparql.util.TypeNotUniqueException ; | |
import com.hp.hpl.jena.sparql.util.graph.GraphUtils ; | |
import com.hp.hpl.jena.tdb.assembler.VocabTDB ; | |
/** | |
* Examples of finding an assembler for a TDB model in a larger collection | |
* of descriptions in a single file. | |
*/ | |
public class ExTDB3 | |
{ | |
public static void main(String... argv) | |
{ | |
String assemblerFile = "Store/tdb-assembler.ttl" ; | |
// Find a particular description in the file where there are several: | |
Model spec = RDFDataMgr.loadModel(assemblerFile) ; | |
// Find the right starting point for the description in some way. | |
Resource root = null ; | |
if ( false ) | |
// If you know the Resource URI: | |
root = spec.createResource("http://example/myChoiceOfURI" ); | |
else | |
{ | |
// Alternatively, look for the a single resource of the right type. | |
try { | |
// Find the required description - the file can contain descriptions of many different types. | |
root = GraphUtils.findRootByType(spec, VocabTDB.tDatasetTDB) ; | |
if ( root == null ) | |
throw new JenaException("Failed to find a suitable root") ; | |
} catch (TypeNotUniqueException ex) | |
{ throw new JenaException("Multiple types for: "+DatasetAssemblerVocab.tDataset) ; } | |
} | |
Dataset ds = (Dataset)Assembler.general.open(root) ; | |
} | |
} |