Android Open Source - senselib Float Data Pool

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The source code is released under:

Copyright (c) 2013 Kaiwen Xu Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Softwa...

Java Source Code

/*
 * Copyright (c) 2013 Kaiwen Xu//w w w.jav  a 2s .  c  o m
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy 
 * of this software and associated documentation files (the "Software"), to 
 * deal in the Software without restriction, including without limitation the 
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 
 * sell copies of the Software, and to permit persons to whom the Software is 
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 
 * IN THE SOFTWARE.
 * 
 */

package net.kevxu.senselib.util;

import java.util.Arrays;

public class FloatDataPool {

  private int mPoolSize;

  private float[] mPool;
  private int mStartPos;
  private int mEndPos;
  private int mSize;

  public FloatDataPool(int poolSize) {
    mPoolSize = poolSize;
    mPool = new float[poolSize];
    mStartPos = 0;
    mEndPos = 0;
    mSize = 0;
  }

  public int size() {
    return mSize;
  }

  public int getPoolSize() {
    return mPoolSize;
  }

  public void append(float value) {
    if (mSize < mPoolSize) {
      mPool[mEndPos] = value;
      mEndPos = (mEndPos + 1) % mPoolSize;
      mSize++;
    } else {
      mStartPos = (mStartPos + 1) % mPoolSize;
      mPool[mEndPos] = value;
      mEndPos = (mEndPos + 1) % mPoolSize;
    }
  }

  public float get(int i) {
    if (i < mSize) {
      return mPool[(mStartPos + i) % mPoolSize];
    } else {
      throw new IndexOutOfBoundsException("i is larger than DataPool size.");
    }
  }

  public float[] getList(int n) {
    if (n > mSize) {
      throw new IndexOutOfBoundsException("n is larger than DataPool size.");
    }

    float[] fd = new float[n];
    for (int i = 0; i < n; i++) {
      fd[i] = get(i);
    }

    return fd;
  }

  public float getFromBack(int i) {
    return get(mSize - 1 - i);
  }

  public float[] getListFromBack(int n) {
    if (n > mSize) {
      throw new IndexOutOfBoundsException("n is larger than DataPool size.");
    }

    float[] pd = new float[n];
    for (int i = 0; i < n; i++) {
      pd[i] = getFromBack(i);
    }

    return pd;
  }

  public float getSum() {
    float sum = 0.0F;

    for (int i = 0; i < mSize; i++) {
      sum += mPool[(mStartPos + i) % mPoolSize];
    }

    return sum;
  }

  @Override
  public String toString() {
    return Arrays.toString(mPool);
  }

}

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