com.cloudera.oryx.kmeans.computation.local.AssignmentRun.java Source code

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Here is the source code for com.cloudera.oryx.kmeans.computation.local.AssignmentRun.java

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/*
 * Copyright (c) 2013, Cloudera, Inc. All Rights Reserved.
 *
 * Cloudera, Inc. 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
 *
 * This software 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 com.cloudera.oryx.kmeans.computation.local;

import com.cloudera.oryx.kmeans.common.WeightedRealVector;
import com.cloudera.oryx.kmeans.computation.cluster.KSketchIndex;
import org.apache.commons.math3.linear.RealVector;

import java.util.List;
import java.util.concurrent.Callable;

public final class AssignmentRun implements Callable<List<WeightedRealVector>> {

    private final KSketchIndex index;
    //private final RandomGenerator random;
    private final int foldId;
    private final List<RealVector> vecs;

    public AssignmentRun(KSketchIndex index, int foldId, List<RealVector> vecs) {
        this.index = index;
        //this.random = random;
        this.foldId = foldId;
        this.vecs = vecs;
    }

    @Override
    public List<WeightedRealVector> call() {
        long[] cnts = new long[index.getPointCounts()[foldId]];
        for (RealVector v : vecs) {
            cnts[index.getDistance(v, foldId, true).getClosestCenterId()]++;
        }
        return index.getWeightedVectorsForFold(foldId, cnts);
    }
}