package org.apache.lucene.search.highlight;
/**
* 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.
*/
import org.apache.lucene.analysis.Token;
/**
* Adds to the score for a fragment based on its tokens
* @author mark@searcharea.co.uk
*/
public interface Scorer
{
/**
* called when a new fragment is started for consideration
* @param newFragment
*/
public void startFragment(TextFragment newFragment);
/**
* Called for each token in the current fragment
* @param token The token to be scored
* @return a score which is passed to the Highlighter class to influence the mark-up of the text
* (this return value is NOT used to score the fragment)
*/
public float getTokenScore(Token token);
/**
* Called when the highlighter has no more tokens for the current fragment - the scorer returns
* the weighting it has derived for the most recent fragment, typically based on the tokens
* passed to getTokenScore().
*
*/
public float getFragmentScore();
}
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