| /* |
| * 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.parse; |
| |
| import org.apache.nutch.protocol.Content; |
| import org.apache.nutch.plugin.PluginRepository; |
| import org.apache.hadoop.conf.Configuration; |
| |
| import org.w3c.dom.DocumentFragment; |
| |
| /** Creates and caches {@link HtmlParseFilter} implementing plugins. */ |
| public class HtmlParseFilters { |
| |
| private HtmlParseFilter[] htmlParseFilters; |
| |
| public static final String HTMLPARSEFILTER_ORDER = "htmlparsefilter.order"; |
| |
| public HtmlParseFilters(Configuration conf) { |
| htmlParseFilters = (HtmlParseFilter[]) PluginRepository.get(conf) |
| .getOrderedPlugins(HtmlParseFilter.class, HtmlParseFilter.X_POINT_ID, |
| HTMLPARSEFILTER_ORDER); |
| } |
| |
| /** Run all defined filters. */ |
| public ParseResult filter(Content content, ParseResult parseResult, |
| HTMLMetaTags metaTags, DocumentFragment doc) { |
| |
| // loop on each filter |
| for (int i = 0; i < this.htmlParseFilters.length; i++) { |
| // call filter interface |
| parseResult = htmlParseFilters[i].filter(content, parseResult, metaTags, |
| doc); |
| |
| // any failure on parse obj, return |
| if (!parseResult.isSuccess()) { |
| // TODO: What happens when parseResult.isEmpty() ? |
| // Maybe clone parseResult and use parseResult as backup... |
| |
| // remove failed parse before return |
| parseResult.filter(); |
| return parseResult; |
| } |
| } |
| |
| return parseResult; |
| } |
| } |