/*
* 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.stanbol.entityhub.indexing.source.jenatdb;
import static org.apache.stanbol.entityhub.indexing.core.config.IndexingConfig.KEY_INDEXING_CONFIG;
import static org.apache.stanbol.entityhub.indexing.source.jenatdb.Constants.DEFAULT_MODEL_DIRECTORY;
import static org.apache.stanbol.entityhub.indexing.source.jenatdb.Constants.PARAM_MODEL_DIRECTORY;
import java.io.File;
import java.util.Map;
import org.apache.stanbol.entityhub.indexing.core.IndexingComponent;
import org.apache.stanbol.entityhub.indexing.core.config.IndexingConfig;
import com.hp.hpl.jena.tdb.TDBFactory;
import com.hp.hpl.jena.tdb.base.file.Location;
import com.hp.hpl.jena.tdb.store.DatasetGraphTDB;
public final class Utils {
private Utils() { /* do not create instances of utility classes */}
/**
* @param modelLocation The directory with the Jena TDB model. Will be created
* if not existent.
* @return
* @throws IllegalArgumentException if <code>null</code> is parsed;
* if the parsed {@link File} exists but is not a directory; if the parsed
* File does NOT exists AND can not be created.
*/
public static DatasetGraphTDB initTDBDataset(File modelLocation) {
if(modelLocation == null){
throw new IllegalArgumentException("The parsed Jena TDB directory" +
"MUST NOT be NULL!");
}
if(modelLocation.exists() && !modelLocation.isDirectory()){
throw new IllegalArgumentException("The configured RDF model directory "+
modelLocation+"exists but is not a Directory");
} else if(!modelLocation.exists()){
if(!modelLocation.mkdirs()){
throw new IllegalArgumentException("Unable to create the configured RDF model directory "+
modelLocation+"!");
}
}
Location location = new Location(modelLocation.getAbsolutePath());
return TDBFactory.createDatasetGraph(location);
}
/**
* uses the parsed configuration to get/create the Jena TDB store
* @param config A configuration as parsed to {@link IndexingComponent#setConfiguration(Map)}
* @return the opened/created Jena TDB dataset
* @throws IllegalArgumentException if the config is <code>null</code>; is
* missing a value for the {@link IndexingConfig#KEY_INDEXING_CONFIG} or
* {@link #initTDBDataset(File)} throws an IllegalArgumentException
*/
public static DatasetGraphTDB getTDBDataset(Map<String,Object> config) {
IndexingConfig indexingConfig = (IndexingConfig)config.get(KEY_INDEXING_CONFIG);
if(indexingConfig == null){
throw new IllegalArgumentException("No IndexingConfig object present as value of key '"
+ KEY_INDEXING_CONFIG+"'!");
}
Object value = config.get(PARAM_MODEL_DIRECTORY);
File modelLocation;
if(value == null){
modelLocation = new File(indexingConfig.getSourceFolder(),DEFAULT_MODEL_DIRECTORY);
} else {
modelLocation = new File(indexingConfig.getSourceFolder(),value.toString());
}
return initTDBDataset(modelLocation);
}
}