org.apache.lucene.search.MaxNonCompetitiveBoostAttribute Maven / Gradle / Ivy
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* 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.lucene.search;
import org.apache.lucene.util.Attribute;
import org.apache.lucene.util.AttributeSource; // javadocs only
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.index.Terms; // javadocs only
/** Add this {@link Attribute} to a fresh {@link AttributeSource} before calling
* {@link MultiTermQuery#getTermsEnum(Terms,AttributeSource)}.
* {@link FuzzyQuery} is using this to control its internal behaviour
* to only return competitive terms.
* Please note: This attribute is intended to be added by the {@link MultiTermQuery.RewriteMethod}
* to an empty {@link AttributeSource} that is shared for all segments
* during query rewrite. This attribute source is passed to all segment enums
* on {@link MultiTermQuery#getTermsEnum(Terms,AttributeSource)}.
* {@link TopTermsRewrite} uses this attribute to
* inform all enums about the current boost, that is not competitive.
* @lucene.internal
*/
public interface MaxNonCompetitiveBoostAttribute extends Attribute {
/** This is the maximum boost that would not be competitive. */
public void setMaxNonCompetitiveBoost(float maxNonCompetitiveBoost);
/** This is the maximum boost that would not be competitive. Default is negative infinity, which means every term is competitive. */
public float getMaxNonCompetitiveBoost();
/** This is the term or null of the term that triggered the boost change. */
public void setCompetitiveTerm(BytesRef competitiveTerm);
/** This is the term or null of the term that triggered the boost change. Default is null, which means every term is competitoive. */
public BytesRef getCompetitiveTerm();
}