| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * 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 from |
| * |
| * 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.uci.ics.hyracks.storage.am.common.ophelpers; |
| |
| public class DoubleArrayList { |
| private double[] data; |
| private int size; |
| private int first; |
| private final int growth; |
| |
| public DoubleArrayList(int initialCapacity, int growth) { |
| data = new double[initialCapacity]; |
| size = 0; |
| first = 0; |
| this.growth = growth; |
| } |
| |
| public int size() { |
| return size; |
| } |
| |
| public int first() { |
| return first; |
| } |
| |
| public void add(double i) { |
| if (size == data.length) { |
| double[] newData = new double[data.length + growth]; |
| System.arraycopy(data, 0, newData, 0, data.length); |
| data = newData; |
| } |
| |
| data[size++] = i; |
| } |
| |
| public void addFirst(double i) { |
| double[] newData = new double[data.length + 1]; |
| System.arraycopy(data, 0, newData, 0, first); |
| System.arraycopy(data, first, newData, first + 1, size - first); |
| data = newData; |
| data[first] = i; |
| size++; |
| } |
| |
| public void removeLast() { |
| if (size > 0) |
| size--; |
| } |
| |
| // WARNING: caller is responsible for checking size > 0 |
| public double getLast() { |
| return data[size - 1]; |
| } |
| |
| public double get(int i) { |
| return data[i]; |
| } |
| |
| // WARNING: caller is responsible for checking i < size |
| public void set(int i, int value) { |
| data[i] = value; |
| |
| } |
| |
| public double getFirst() { |
| return data[first]; |
| } |
| |
| public void moveFirst() { |
| first++; |
| } |
| |
| public void clear() { |
| size = 0; |
| first = 0; |
| } |
| |
| public boolean isLast() { |
| return size == first; |
| } |
| |
| public boolean isEmpty() { |
| return size == 0; |
| } |
| } |