com.jaeksoft.searchlib.function.expression.ScoreFunctionQuery Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of opensearchserver Show documentation
Show all versions of opensearchserver Show documentation
OpenSearchServer is a powerful, enterprise-class, search engine program. Using the web user interface, the crawlers (web, file, database, ...) and the REST/RESTFul API you will be able to integrate quickly and easily advanced full-text search capabilities in your application. OpenSearchServer runs on Windows and Linux/Unix/BSD.
The newest version!
/**
* License Agreement for OpenSearchServer
*
* Copyright (C) 2008-2013 Emmanuel Keller / Jaeksoft
*
* http://www.open-search-server.com
*
* This file is part of OpenSearchServer.
*
* OpenSearchServer is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenSearchServer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenSearchServer.
* If not, see .
**/
package com.jaeksoft.searchlib.function.expression;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.function.CustomScoreProvider;
import org.apache.lucene.search.function.CustomScoreQuery;
import org.apache.lucene.search.function.ValueSourceQuery;
public class ScoreFunctionQuery extends CustomScoreQuery {
/**
*
*/
private static final long serialVersionUID = -8153528644026354484L;
private Query subQuery;
private Expression expression;
private class ScoreFunctionProvider extends CustomScoreProvider {
public ScoreFunctionProvider(IndexReader reader) {
super(reader);
}
@Override
public float customScore(int doc, float subQueryScore, float valSrcScore) {
return expression.getValue(subQueryScore, valSrcScore);
}
@Override
public float customScore(int doc, float subQueryScore,
float[] valSrcScores) {
return expression.getValue(subQueryScore, valSrcScores);
}
}
protected ScoreFunctionQuery(Query subQuery, Expression expression)
throws SyntaxError {
super(subQuery);
this.subQuery = subQuery;
this.expression = expression;
}
protected ScoreFunctionQuery(Query subQuery,
ValueSourceQuery valueSourceQuery, Expression expression)
throws SyntaxError {
super(subQuery, valueSourceQuery);
this.subQuery = subQuery;
this.expression = expression;
}
protected ScoreFunctionQuery(Query subQuery,
ValueSourceQuery[] valueSourceQueries, Expression expression)
throws SyntaxError {
super(subQuery, valueSourceQueries);
this.subQuery = subQuery;
this.expression = expression;
}
@Override
protected CustomScoreProvider getCustomScoreProvider(IndexReader reader) {
return new ScoreFunctionProvider(reader);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder("score(");
if (subQuery != null)
sb.append(subQuery.toString());
sb.append(')');
if (expression != null)
sb.append(expression.toString());
return sb.toString();
}
}