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package org.apache.lucene.search.payloads;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import java.io.Serializable;
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import org.apache.lucene.search.Explanation;
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* An abstract class that defines a way for Payload*Query instances to transform
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* the cumulative effects of payload scores for a document.
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* @see org.apache.lucene.search.payloads.PayloadTermQuery for more information
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* @lucene.experimental This class and its derivations are experimental and subject to
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public abstract class PayloadFunction implements Serializable {
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* Calculate the score up to this point for this doc and field
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* @param docId The current doc
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* @param field The field
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* @param start The start position of the matching Span
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* @param end The end position of the matching Span
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* @param numPayloadsSeen The number of payloads seen so far
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* @param currentScore The current score so far
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* @param currentPayloadScore The score for the current payload
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* @return The new current Score
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* @see org.apache.lucene.search.spans.Spans
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public abstract float currentScore(int docId, String field, int start, int end, int numPayloadsSeen, float currentScore, float currentPayloadScore);
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* Calculate the final score for all the payloads seen so far for this doc/field
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* @param docId The current doc
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* @param field The current field
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* @param numPayloadsSeen The total number of payloads seen on this document
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* @param payloadScore The raw score for those payloads
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* @return The final score for the payloads
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public abstract float docScore(int docId, String field, int numPayloadsSeen, float payloadScore);
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public Explanation explain(int docId, int numPayloadsSeen, float payloadScore){
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Explanation result = new Explanation();
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result.setDescription("Unimpl Payload Function Explain");
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public abstract int hashCode();
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public abstract boolean equals(Object o);