StringCharBuffer.java revision 51b1b6997fd3f980076b8081f7f1165ccc2a4008
151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. 351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is free software; you can redistribute it and/or modify it 651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * under the terms of the GNU General Public License version 2 only, as 751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * published by the Free Software Foundation. Oracle designates this 851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * particular file as subject to the "Classpath" exception as provided 951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * by Oracle in the LICENSE file that accompanied this code. 1051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is distributed in the hope that it will be useful, but WITHOUT 1251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * version 2 for more details (a copy is included in the LICENSE file that 1551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * accompanied this code). 1651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * You should have received a copy of the GNU General Public License version 1851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2 along with this work; if not, write to the Free Software Foundation, 1951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * or visit www.oracle.com if you need additional information or have any 2351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * questions. 2451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 2551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskipackage java.nio; 2751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski// ## If the sequence is a string, use reflection to share its array 3051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskiclass StringCharBuffer // package-private 3251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski extends CharBuffer 3351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski{ 3451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski CharSequence str; 3551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski StringCharBuffer(CharSequence s, int start, int end) { // package-private 3751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski super(-1, start, end, s.length()); 3851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski int n = s.length(); 3951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if ((start < 0) || (start > n) || (end < start) || (end > n)) 4051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new IndexOutOfBoundsException(); 4151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski str = s; 4251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 4351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public CharBuffer slice() { 4551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return new StringCharBuffer(str, 4651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski -1, 4751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 0, 4851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski this.remaining(), 4951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski this.remaining(), 5051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski offset + this.position()); 5151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 5251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski private StringCharBuffer(CharSequence s, 5451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski int mark, 5551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski int pos, 5651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski int limit, 5751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski int cap, 5851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski int offset) { 5951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski super(mark, pos, limit, cap, null, offset); 6051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski str = s; 6151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 6251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public CharBuffer duplicate() { 6451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return new StringCharBuffer(str, markValue(), 6551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski position(), limit(), capacity(), offset); 6651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 6751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public CharBuffer asReadOnlyBuffer() { 6951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return duplicate(); 7051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 7151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public final char get() { 7351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return str.charAt(nextGetIndex() + offset); 7451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 7551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public final char get(int index) { 7751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return str.charAt(checkIndex(index) + offset); 7851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 7951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 8051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski // ## Override bulk get methods for better performance 8151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 8251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public final CharBuffer put(char c) { 8351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new ReadOnlyBufferException(); 8451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 8551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 8651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public final CharBuffer put(int index, char c) { 8751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new ReadOnlyBufferException(); 8851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 8951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 9051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public final CharBuffer compact() { 9151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new ReadOnlyBufferException(); 9251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 9351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 9451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public final boolean isReadOnly() { 9551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return true; 9651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 9751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 9851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski final String toString(int start, int end) { 9951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return str.toString().substring(start + offset, end + offset); 10051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 10151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 10251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public final CharBuffer subSequence(int start, int end) { 10351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski try { 10451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski int pos = position(); 10551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return new StringCharBuffer(str, 10651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski -1, 10751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski pos + checkIndex(start, pos), 10851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski pos + checkIndex(end, pos), 10951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski capacity(), 11051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski offset); 11151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } catch (IllegalArgumentException x) { 11251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new IndexOutOfBoundsException(); 11351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 11451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 11551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 11651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public boolean isDirect() { 11751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return false; 11851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 11951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 12051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public ByteOrder order() { 12151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return ByteOrder.nativeOrder(); 12251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 12351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 12451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 125