| /* |
| * 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 tdb.examples; |
| |
| import org.apache.jena.riot.RDFDataMgr ; |
| |
| import org.apache.jena.assembler.Assembler ; |
| import org.apache.jena.query.Dataset ; |
| import org.apache.jena.rdf.model.Model ; |
| import org.apache.jena.rdf.model.Resource ; |
| import org.apache.jena.shared.JenaException ; |
| import org.apache.jena.sparql.core.assembler.DatasetAssemblerVocab ; |
| import org.apache.jena.sparql.util.TypeNotUniqueException ; |
| import org.apache.jena.sparql.util.graph.GraphUtils ; |
| import org.apache.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) ; |
| } |
| } |