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Ultra fast TeamApps database

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/*-
 * ========================LICENSE_START=================================
 * UniversalDB
 * ---
 * Copyright (C) 2014 - 2023 TeamApps.org
 * ---
 * Licensed 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.
 * =========================LICENSE_END==================================
 */
/*
 * Copyright (c) 2016 teamapps.org (see code comments for author's name)
 *
 * Licensed 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.teamapps.universaldb.index.text;

import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.NumericDocValues;
import org.apache.lucene.search.ScoreMode;
import org.apache.lucene.search.SimpleCollector;

import java.io.IOException;
import java.util.BitSet;

class SearchCollector extends SimpleCollector {
    public static final String ID = "id";

    private NumericDocValues idValues;
    private final BitSet resultIds;

    public SearchCollector() {
        resultIds = new BitSet();
    }

    @Override
    public void collect(int doc) throws IOException {
        if (idValues.advanceExact(doc)) {
            int id = (int) idValues.longValue();
            if (id > 0) {
                resultIds.set(id);
            }
        }
    }

    @Override
    public void doSetNextReader(LeafReaderContext context) throws IOException {
        idValues = context.reader().getNumericDocValues(ID);
    }

    public BitSet getResultIds() {
        return resultIds;
    }

    @Override
    public ScoreMode scoreMode() {
        return ScoreMode.COMPLETE_NO_SCORES;
    }
}