/*
* 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.segment;
import java.util.Collection;
import org.apache.hadoop.io.WritableComparable;
import org.apache.nutch.crawl.CrawlDatum;
import org.apache.nutch.parse.ParseData;
import org.apache.nutch.parse.ParseText;
import org.apache.nutch.protocol.Content;
/**
* Interface used to filter segments during segment merge.
* It allows filtering on more sophisticated criteria
* than just URLs. In particular it allows filtering based
* on matadata collected while parsing page.
*
* @author Marcin Okraszewski
*/
public interface SegmentMergeFilter {
/** The name of the extension point. */
public final static String X_POINT_ID = SegmentMergeFilter.class.getName();
/** The filtering method which gets all information being merged for
* a given key (URL).
* @return true values for this key (URL) should
* be merged into the new segment.
*/
public boolean filter(
WritableComparable key,
CrawlDatum generateData, CrawlDatum fetchData, CrawlDatum sigData,
Content content, ParseData parseData, ParseText parseText,
Collection linked);
}