| /** |
| * 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.net; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.nutch.plugin.PluginRepository; |
| |
| /** Creates and caches {@link URLFilter} implementing plugins. */ |
| public class URLFilters { |
| |
| public static final String URLFILTER_ORDER = "urlfilter.order"; |
| private URLFilter[] filters; |
| |
| public URLFilters(Configuration conf) { |
| this.filters = (URLFilter[]) PluginRepository.get(conf).getOrderedPlugins( |
| URLFilter.class, URLFilter.X_POINT_ID, URLFILTER_ORDER); |
| } |
| |
| public URLFilter[] getFilters() { |
| return this.filters; |
| } |
| |
| /** Run all defined filters. Assume logical AND. */ |
| public String filter(String urlString) throws URLFilterException { |
| for (int i = 0; i < this.filters.length; i++) { |
| if (urlString == null) |
| return null; |
| urlString = this.filters[i].filter(urlString); |
| |
| } |
| return urlString; |
| } |
| } |