DoubleArrayBuffer.java revision eaa2ff09069424b0f7a95c7cd831cef1b744fe67
1adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/* 2adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one or more 3adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * contributor license agreements. See the NOTICE file distributed with 4adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * this work for additional information regarding copyright ownership. 5adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The ASF licenses this file to You under the Apache License, Version 2.0 6adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * (the "License"); you may not use this file except in compliance with 7adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the License. You may obtain a copy of the License at 8adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 9adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 10adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 11adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Unless required by applicable law or agreed to in writing, software 12adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 13adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * See the License for the specific language governing permissions and 15adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * limitations under the License. 16adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 17adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 18eaa2ff09069424b0f7a95c7cd831cef1b744fe67Jesse Wilsonpackage java.nio; 19adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 20adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/** 21adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * DoubleArrayBuffer, ReadWriteDoubleArrayBuffer and ReadOnlyDoubleArrayBuffer 22adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * compose the implementation of array based double buffers. 23adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * <p> 24adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * DoubleArrayBuffer implements all the shared readonly methods and is extended 25adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * by the other two classes. 26adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * </p> 27adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * <p> 28adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * All methods are marked final for runtime performance. 29adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * </p> 30adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 31adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 32adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectabstract class DoubleArrayBuffer extends DoubleBuffer { 33adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 34adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected final double[] backingArray; 35adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 36adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected final int offset; 37adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 38adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project DoubleArrayBuffer(double[] array) { 39adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project this(array.length, array, 0); 40adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 41adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 42adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project DoubleArrayBuffer(int capacity) { 43adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project this(capacity, new double[capacity], 0); 44adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 45adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 46adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project DoubleArrayBuffer(int capacity, double[] backingArray, int offset) { 47adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project super(capacity); 48adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project this.backingArray = backingArray; 49adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project this.offset = offset; 50adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 51adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 52eaa2ff09069424b0f7a95c7cd831cef1b744fe67Jesse Wilson @Override 53adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public final double get() { 54adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (position == limit) { 55adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new BufferUnderflowException(); 56adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 57adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return backingArray[offset + position++]; 58adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 59adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 60eaa2ff09069424b0f7a95c7cd831cef1b744fe67Jesse Wilson @Override 61adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public final double get(int index) { 62adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (index < 0 || index >= limit) { 63adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IndexOutOfBoundsException(); 64adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 65adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return backingArray[offset + index]; 66adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 67adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 68eaa2ff09069424b0f7a95c7cd831cef1b744fe67Jesse Wilson @Override 69adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public final DoubleBuffer get(double[] dest, int off, int len) { 70adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project int length = dest.length; 71eaa2ff09069424b0f7a95c7cd831cef1b744fe67Jesse Wilson if (off < 0 || len < 0 || (long) off + (long) len > length) { 72adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new IndexOutOfBoundsException(); 73adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 74adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (len > remaining()) { 75adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw new BufferUnderflowException(); 76adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 77eaa2ff09069424b0f7a95c7cd831cef1b744fe67Jesse Wilson System.arraycopy(backingArray, offset + position, dest, off, len); 78adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project position += len; 79adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return this; 80adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 81eaa2ff09069424b0f7a95c7cd831cef1b744fe67Jesse Wilson 82eaa2ff09069424b0f7a95c7cd831cef1b744fe67Jesse Wilson @Override 83adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public final boolean isDirect() { 84adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return false; 85adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 86adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 87eaa2ff09069424b0f7a95c7cd831cef1b744fe67Jesse Wilson @Override 88adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public final ByteOrder order() { 89adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return ByteOrder.nativeOrder(); 90adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 91adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 92adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project} 93