htmlparsefilter.java

nutch0.8源码

/**
 * Copyright 2005 The Apache Software Foundation
 *
 * Licensed 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;

// JDK imports
import org.w3c.dom.DocumentFragment;

// Hadoop imports
import org.apache.hadoop.conf.Configurable;

// Nutch imports
import org.apache.nutch.plugin.Pluggable;
import org.apache.nutch.protocol.Content;


/** Extension point for DOM-based HTML parsers.  Permits one to add additional
 * metadata to HTML parses.  All plugins found which implement this extension
 * point are run sequentially on the parse.
 */
public interface HtmlParseFilter extends Pluggable, Configurable {
  /** The name of the extension point. */
  final static String X_POINT_ID = HtmlParseFilter.class.getName();

  /** Adds metadata or otherwise modifies a parse of HTML content, given
   * the DOM tree of a page. */
  Parse filter(Content content, Parse parse, HTMLMetaTags metaTags, DocumentFragment doc);
}