com.jaeksoft.searchlib.result.collector.collapsing.CollapseDistanceCollector.java Source code

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Here is the source code for com.jaeksoft.searchlib.result.collector.collapsing.CollapseDistanceCollector.java

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/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 2014 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 <http://www.gnu.org/licenses/>.
 **/

package com.jaeksoft.searchlib.result.collector.collapsing;

import org.apache.commons.lang.ArrayUtils;

import com.jaeksoft.searchlib.result.collector.AbstractBaseCollector;
import com.jaeksoft.searchlib.result.collector.AbstractExtendsCollector;
import com.jaeksoft.searchlib.result.collector.CollapseDistanceInterface;
import com.jaeksoft.searchlib.result.collector.DistanceInterface;
import com.jaeksoft.searchlib.util.array.FloatBufferedArray;

public class CollapseDistanceCollector
        extends AbstractExtendsCollector<CollapseCollectorInterface, CollapseBaseCollector>
        implements CollapseCollectorInterface, CollapseDistanceInterface {

    final private float[] sourceDistances;
    final private FloatBufferedArray distanceCollector;

    private float[] distances;
    private float[][] collapsedDistances;
    final private float maxDistance;
    final private float minDistance;
    private int currentPos;

    public CollapseDistanceCollector(final CollapseBaseCollector base, final DistanceInterface distanceInterface) {
        super(base);
        this.sourceDistances = distanceInterface.getDistances();
        distanceCollector = new FloatBufferedArray(this.sourceDistances.length);
        maxDistance = 0;
        minDistance = Float.MAX_VALUE;
        currentPos = 0;
        distances = null;
        collapsedDistances = new float[base.getIds().length][];
    }

    private CollapseDistanceCollector(final CollapseBaseCollector base, CollapseDistanceCollector src) {
        super(base);
        this.sourceDistances = null;
        this.distanceCollector = null;

        this.distances = ArrayUtils.clone(src.distances);
        this.maxDistance = src.maxDistance;
        this.minDistance = src.minDistance;
        this.currentPos = src.currentPos;

        this.collapsedDistances = new float[src.collapsedDistances.length][];
        int i = 0;
        for (float[] collDistanceArray : src.collapsedDistances)
            this.collapsedDistances[i++] = ArrayUtils.clone(collDistanceArray);
    }

    @Override
    public CollapseDistanceCollector duplicate(AbstractBaseCollector<?> base) {
        parent.duplicate(base);
        return new CollapseDistanceCollector((CollapseBaseCollector) base, this);
    }

    @Override
    final public int collectDoc(final int sourcePos) {
        int pos = parent.collectDoc(sourcePos);
        if (pos != currentPos)
            throw new RuntimeException("Internal position issue: " + pos + " - " + currentPos);
        currentPos++;
        float dist = sourceDistances[sourcePos];
        distanceCollector.add(dist);
        return pos;
    }

    @Override
    final public void collectCollapsedDoc(final int sourcePos, final int collapsePos) {
        parent.collectCollapsedDoc(sourcePos, collapsePos);
        if (collapsedDistances == null)
            return;
        if (collapsedDistances[collapsePos] == null)
            collapsedDistances[collapsePos] = new float[] { sourceDistances[sourcePos] };
        else
            collapsedDistances[collapsePos] = ArrayUtils.add(collapsedDistances[collapsePos],
                    sourceDistances[sourcePos]);

    }

    @Override
    final public void endCollection() {
        parent.endCollection();
        distances = distanceCollector.getFinalArray();
    }

    @Override
    final public void doSwap(final int pos1, final int pos2) {
        parent.doSwap(pos1, pos2);
        float dist = distances[pos1];
        distances[pos1] = distances[pos2];
        distances[pos2] = dist;
        if (collapsedDistances != null) {
            float[] colArray = collapsedDistances[pos1];
            collapsedDistances[pos1] = collapsedDistances[pos2];
            collapsedDistances[pos2] = colArray;
        }
    }

    @Override
    final public float getMaxDistance() {
        return maxDistance;
    }

    @Override
    final public float getMinDistance() {
        return minDistance;
    }

    @Override
    final public float[] getDistances() {
        return distances;
    }

    @Override
    final public int getSize() {
        if (distances == null)
            return 0;
        return distances.length;
    }

    @Override
    public float[] getCollapsedDistances(int pos) {
        if (collapsedDistances == null)
            return null;
        return collapsedDistances[pos];
    }

}