| /* |
| * 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.lucene.queries.payloads; |
| import org.apache.lucene.search.Explanation; |
| import org.apache.lucene.search.spans.Spans; |
| |
| /** |
| * An abstract class that defines a way for PayloadScoreQuery instances to transform |
| * the cumulative effects of payload scores for a document. |
| * |
| * @see org.apache.lucene.queries.payloads.PayloadScoreQuery for more information |
| * |
| * @lucene.experimental This class and its derivations are experimental and subject to |
| * change |
| * |
| **/ |
| public abstract class PayloadFunction { |
| |
| /** |
| * Calculate the score up to this point for this doc and field |
| * @param docId The current doc |
| * @param field The field |
| * @param start The start position of the matching Span |
| * @param end The end position of the matching Span |
| * @param numPayloadsSeen The number of payloads seen so far |
| * @param currentScore The current score so far |
| * @param currentPayloadScore The score for the current payload |
| * @return The new current Score |
| * |
| * @see Spans |
| */ |
| public abstract float currentScore(int docId, String field, int start, int end, int numPayloadsSeen, float currentScore, float currentPayloadScore); |
| |
| /** |
| * Calculate the final score for all the payloads seen so far for this doc/field |
| * @param docId The current doc |
| * @param field The current field |
| * @param numPayloadsSeen The total number of payloads seen on this document |
| * @param payloadScore The raw score for those payloads |
| * @return The final score for the payloads |
| */ |
| public abstract float docScore(int docId, String field, int numPayloadsSeen, float payloadScore); |
| |
| public Explanation explain(int docId, String field, int numPayloadsSeen, float payloadScore){ |
| return Explanation.match( |
| docScore(docId, field, numPayloadsSeen, payloadScore), |
| getClass().getSimpleName() + ".docScore()"); |
| }; |
| |
| @Override |
| public abstract int hashCode(); |
| |
| @Override |
| public abstract boolean equals(Object o); |
| |
| } |