alba.solr.core.DynamicScorer.java Source code

Introduction

Here is the source code for alba.solr.core.DynamicScorer.java

Source

package alba.solr.core;

/*
 * 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 java.io.IOException;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.LeafReader;
import org.apache.lucene.index.MultiFields;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.util.Bits;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DynamicScorer extends Scorer {

    protected final LeafReader reader;
    private int doc = -1;
    protected final int maxDoc;
    //protected final FunctionValues values;
    protected boolean checkDeletes;
    private final Bits liveDocs;
    private CallableFunction function;
    private Object[] functionParams;

    Logger logger = LoggerFactory.getLogger(this.getClass().getName());
    private DynamicQuery query;

    public DynamicScorer(IndexReader reader, CallableFunction function, Object[] functionParams,
            DynamicQuery query) {
        super(null);
        logger.error("created dynamic scorer!");

        this.query = query;
        this.reader = (LeafReader) reader;
        this.function = function;
        this.maxDoc = reader.maxDoc();
        //this.values = values;
        setCheckDeletes(true);
        this.liveDocs = MultiFields.getLiveDocs(reader);
        this.functionParams = functionParams;
    }

    public IndexReader getReader() {
        return reader;
    }

    public void setCheckDeletes(boolean checkDeletes) {
        this.checkDeletes = checkDeletes && reader.hasDeletions();
    }

    public boolean matches(int doc) {
        return (!checkDeletes || liveDocs.get(doc)) && matchesValue(doc);
    }

    public boolean matchesValue(int doc) {
        try {
            return this.query.getValueSource().getValues(null, reader.getContext()).boolVal(doc);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            logger.error("matchesValue " + doc, e);
            return false;
        }

    }

    @Override
    public int docID() {
        return doc;
    }

    @Override
    public int nextDoc() throws IOException {
        for (;;) {
            doc++;
            if (doc >= maxDoc)
                return doc = NO_MORE_DOCS;
            if (matches(doc))
                return doc;
        }
    }

    @Override
    public int advance(int target) throws IOException {
        // also works fine when target==NO_MORE_DOCS
        doc = target - 1;
        return nextDoc();
    }

    @Override
    public float score() throws IOException {
        return 1;
        //  return values.floatVal(doc);
    }

    @Override
    public int freq() throws IOException {
        return 1;
    }

    @Override
    public long cost() {
        return maxDoc;
    }
}