Source code

001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.examples.group.bgd.utils;
020
021import javax.inject.Inject;
022import java.util.Arrays;
023import java.util.logging.Level;
024import java.util.logging.Logger;
025
026/**
027 * Step sizes array.
028 */
029public class StepSizes {
030
031  private static final Logger LOG = Logger.getLogger(StepSizes.class.getName());
032
033  private final double[] t;
034  private final int gridSize = 21;
035
036  @Inject
037  public StepSizes() {
038    this.t = new double[gridSize];
039    final int mid = gridSize / 2;
040    t[mid] = 1;
041    for (int i = mid - 1; i >= 0; i--) {
042      t[i] = t[i + 1] / 2.0;
043    }
044    for (int i = mid + 1; i < gridSize; i++) {
045      t[i] = t[i - 1] * 2.0;
046    }
047  }
048
049  public double[] getT() {
050    return t;
051  }
052
053  public int getGridSize() {
054    return gridSize;
055  }
056
057  public static void main(final String[] args) {
058    final StepSizes t = new StepSizes();
059    LOG.log(Level.INFO, "OUT: {0}", Arrays.toString(t.getT()));
060  }
061}