com.intel.analytics.bigdl.ppml.fl.psi.Utils Maven / Gradle / Ivy

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/*
 * Copyright 2016 The BigDL Authors.
 *
 * 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 com.intel.analytics.bigdl.ppml.fl.psi;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.*;


public class Utils {
    private static final Logger logger = LoggerFactory.getLogger(Utils.class);

    // TODO for XGboost
    public ArrayList> partition(int partitionNum, ArrayList dataset) {
        return new ArrayList<>();
    }

    public static void shuffle(List array,int seed){
        Collections.shuffle(array,new Random(seed));
    }
    public static String getRandomUUID() {
        return UUID.randomUUID().toString();
    }

    public static int getRandomInt() {
        Random rand = new Random();
        return rand.nextInt();
    }


    public static int getTotalSplitNum(List list, int splitSize) {
        return (int)Math.ceil((double)list.size() / splitSize);
    }

    public static List getSplit(List list, int split, int totalSplitNum, int splitSize) {
        if (split < totalSplitNum - 1) {
            return list.subList(split * splitSize, (split + 1) * splitSize);
        } else {
            return list.subList(split * splitSize, list.size());
        }

    }
}