1/* 2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package sun.java2d.xr; 27 28import java.util.*; 29 30/** 31 * Growable int array, designed to allow subclasses to emulate 32 * the behaviour of value types. 33 * 34 * @author Clemens Eisserer 35 */ 36 37public class GrowableByteArray 38{ 39 40 byte[] array; 41 int size; 42 int cellSize; 43 44 public GrowableByteArray(int cellSize, int initialSize) 45 { 46 array = new byte[initialSize]; 47 size = 0; 48 this.cellSize = cellSize; 49 } 50 51 private int getNextCellIndex() 52 { 53 int oldSize = size; 54 size += cellSize; 55 56 if (size >= array.length) 57 { 58 growArray(); 59 } 60 61 return oldSize; 62 } 63 64 /** 65 * @return a direct reference to the backing array. 66 */ 67 public byte[] getArray() 68 { 69 return array; 70 } 71 72 /** 73 * @return a copy of the backing array. 74 */ 75 public byte[] getSizedArray() 76 { 77 return Arrays.copyOf(array, getSize()); 78 } 79 80 public final int getByte(int index) 81 { 82 return array[getCellIndex(index)]; 83 } 84 85 /** 86 * Returns the index of the next free cell, 87 * and grows the backing arrays if required. 88 */ 89 public final int getNextIndex() 90 { 91 return getNextCellIndex() / cellSize; 92 } 93 94 protected final int getCellIndex(int cellIndex) 95 { 96 return cellSize * cellIndex; 97 } 98 99 public final void addByte(byte i) 100 { 101 int nextIndex = getNextIndex(); 102 array[nextIndex] = i; 103 } 104 105 /** 106 * @return The number of stored cells. 107 */ 108 public final int getSize() 109 { 110 return size / cellSize; 111 } 112 113 public void clear() 114 { 115 size = 0; 116 } 117 118 protected void growArray() 119 { 120 int newSize = Math.max(array.length * 2, 10); 121 byte[] oldArray = array; 122 array = new byte[newSize]; 123 124 System.arraycopy(oldArray, 0, array, 0, oldArray.length); 125 } 126 127} 128