| /* |
| * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.nio; |
| |
| |
| // ## If the sequence is a string, use reflection to share its array |
| |
| class StringCharBuffer // package-private |
| extends CharBuffer |
| { |
| CharSequence str; |
| |
| StringCharBuffer(CharSequence s, int start, int end) { // package-private |
| super(-1, start, end, s.length()); |
| int n = s.length(); |
| if ((start < 0) || (start > n) || (end < start) || (end > n)) |
| throw new IndexOutOfBoundsException(); |
| str = s; |
| } |
| |
| public CharBuffer slice() { |
| return new StringCharBuffer(str, |
| -1, |
| 0, |
| this.remaining(), |
| this.remaining(), |
| offset + this.position()); |
| } |
| |
| private StringCharBuffer(CharSequence s, |
| int mark, |
| int pos, |
| int limit, |
| int cap, |
| int offset) { |
| super(mark, pos, limit, cap, null, offset); |
| str = s; |
| } |
| |
| public CharBuffer duplicate() { |
| return new StringCharBuffer(str, markValue(), |
| position(), limit(), capacity(), offset); |
| } |
| |
| public CharBuffer asReadOnlyBuffer() { |
| return duplicate(); |
| } |
| |
| public final char get() { |
| return str.charAt(nextGetIndex() + offset); |
| } |
| |
| public final char get(int index) { |
| return str.charAt(checkIndex(index) + offset); |
| } |
| |
| char getUnchecked(int index) { |
| return str.charAt(index + offset); |
| } |
| |
| // ## Override bulk get methods for better performance |
| |
| public final CharBuffer put(char c) { |
| throw new ReadOnlyBufferException(); |
| } |
| |
| public final CharBuffer put(int index, char c) { |
| throw new ReadOnlyBufferException(); |
| } |
| |
| public final CharBuffer compact() { |
| throw new ReadOnlyBufferException(); |
| } |
| |
| public final boolean isReadOnly() { |
| return true; |
| } |
| |
| final String toString(int start, int end) { |
| return str.toString().substring(start + offset, end + offset); |
| } |
| |
| public final CharBuffer subSequence(int start, int end) { |
| try { |
| int pos = position(); |
| return new StringCharBuffer(str, |
| -1, |
| pos + checkIndex(start, pos), |
| pos + checkIndex(end, pos), |
| capacity(), |
| offset); |
| } catch (IllegalArgumentException x) { |
| throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| public boolean isDirect() { |
| return false; |
| } |
| |
| public ByteOrder order() { |
| return ByteOrder.nativeOrder(); |
| } |
| |
| } |