/**
* 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.searcher;
// Lucene imports
import org.apache.lucene.search.BooleanQuery;
// Hadoop imports
import org.apache.hadoop.conf.Configurable;
// Nutch imports
import org.apache.nutch.plugin.Pluggable;
/** Extension point for query translation. Permits one to add metadata to a
* query. All plugins found which implement this extension point are run
* sequentially on the query.
*/
public interface QueryFilter extends Pluggable, Configurable {
/** The name of the extension point. */
final static String X_POINT_ID = QueryFilter.class.getName();
/** Adds clauses or otherwise modifies the BooleanQuery that will be
* searched. */
BooleanQuery filter(Query input, BooleanQuery translation)
throws QueryException;
}