| /** |
| * 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.nutch.util.domain; |
| |
| import java.io.InputStream; |
| import java.lang.invoke.MethodHandles; |
| import java.util.HashMap; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.hadoop.util.StringUtils; |
| |
| /** |
| * Storage class for <code>DomainSuffix</code> objects Note: this class is |
| * singleton |
| * |
| * @author Enis Soztutar <enis.soz.nutch@gmail.com> |
| */ |
| public class DomainSuffixes { |
| private static final Logger LOG = LoggerFactory |
| .getLogger(MethodHandles.lookup().lookupClass()); |
| |
| private HashMap<String, DomainSuffix> domains = new HashMap<>(); |
| |
| private static DomainSuffixes instance; |
| |
| /** private ctor */ |
| private DomainSuffixes() { |
| String file = "domain-suffixes.xml"; |
| InputStream input = this.getClass().getClassLoader() |
| .getResourceAsStream(file); |
| try { |
| new DomainSuffixesReader().read(this, input); |
| } catch (Exception ex) { |
| LOG.warn(StringUtils.stringifyException(ex)); |
| } |
| } |
| |
| /** |
| * Singleton instance, lazy instantination |
| * |
| * @return returns the domain suffix instance |
| */ |
| public static DomainSuffixes getInstance() { |
| if (instance == null) { |
| instance = new DomainSuffixes(); |
| } |
| return instance; |
| } |
| |
| void addDomainSuffix(DomainSuffix tld) { |
| domains.put(tld.getDomain(), tld); |
| } |
| |
| /** return whether the extension is a registered domain entry */ |
| public boolean isDomainSuffix(String extension) { |
| return domains.containsKey(extension); |
| } |
| |
| /** |
| * Return the {@link DomainSuffix} object for the extension, if extension is a |
| * top level domain returned object will be an instance of |
| * {@link TopLevelDomain} |
| * |
| * @param extension |
| * of the domain |
| */ |
| public DomainSuffix get(String extension) { |
| return domains.get(extension); |
| } |
| |
| } |