| /* |
| * 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.enhancer.engines.entitytagging.impl; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.util.Map; |
| import java.util.ServiceLoader; |
| |
| import org.apache.stanbol.commons.stanboltools.datafileprovider.DataFileProvider; |
| |
| /** |
| * |
| * The Standalone implementation of the ManagedSolrServer uses |
| * {@link ServiceLoader} to search for {@link DataFileProvider}. |
| * This implementation ensures that the DBpedia default data index can be loaded |
| * and initialised by the StandaloneManagedSolrServer. |
| * |
| * @author Rupert Westenthaler |
| * |
| */ |
| public class DbPediaDataFileProvider implements DataFileProvider { |
| |
| private static String DBPEDIA_PREFIX = "org/apache/stanbol/data/site/dbpedia/default/index/"; |
| |
| @Override |
| public InputStream getInputStream(String bundleSymbolicName, String filename, Map<String,String> comments) throws IOException { |
| String resource = DBPEDIA_PREFIX+filename; |
| URL resourceUri = lookupResource(resource); |
| if(resourceUri != null){ |
| return resourceUri.openStream(); |
| } else { |
| throw new IOException("Resource '"+resource+"' not found"); |
| } |
| } |
| |
| @Override |
| public boolean isAvailable(String bundleSymbolicName, String filename, Map<String,String> comments) { |
| return lookupResource(DBPEDIA_PREFIX+filename) != null; |
| } |
| /** |
| * @param resource |
| * @return |
| */ |
| private URL lookupResource(String resource) { |
| ClassLoader cl = DbPediaDataFileProvider.class.getClassLoader(); |
| URL resourceUri = cl.getResource(resource); |
| if(resourceUri == null){ |
| cl = Thread.currentThread().getContextClassLoader(); |
| resourceUri = cl.getResource(resource); |
| } |
| if(resourceUri == null){ |
| resourceUri = ClassLoader.getSystemResource(resource); |
| } |
| return resourceUri; |
| } |
| |
| } |