edu.iu.lda.SortTask.java Source code

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Here is the source code for edu.iu.lda.SortTask.java

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/*
 * Copyright 2013-2017 Indiana University
 * 
 * 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 edu.iu.lda;

import edu.iu.harp.schdynamic.Task;
import it.unimi.dsi.fastutil.longs.LongArrayList;
import it.unimi.dsi.fastutil.longs.LongArrays;
import it.unimi.dsi.fastutil.longs.LongComparator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class SortTask implements Task<LongArrayList, Object> {

    protected static final Log LOG = LogFactory.getLog(SortTask.class);

    private final long[] array;

    public SortTask(int numTopics) {
        array = new long[numTopics];
    }

    @Override
    public Object run(LongArrayList list) throws Exception {
        int size = list.size();
        list.toArray(array);
        LongArrays.quickSort(array, 0, size, new LongComparator() {

            @Override
            public int compare(Long o1, Long o2) {
                return Long.compare(o2, o1);
            }

            @Override
            public int compare(long k1, long k2) {
                return Long.compare(k2, k1);
            }
        });
        list.clear();
        list.addElements(0, array, 0, size);
        return null;
    }
}