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| 1 | /* | ||
| 2 | * Copyright (c) 2000, 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 | |||
| 26 | package java.nio; | ||
| 27 | |||
| 28 | |||
| 29 | // ## If the sequence is a string, use reflection to share its array | ||
| 30 | |||
| 31 | class StringCharBuffer // package-private | ||
| 32 | extends CharBuffer | ||
| 33 | { | ||
| 34 | CharSequence str; | ||
| 35 | |||
| 36 | StringCharBuffer(CharSequence s, int start, int end) { // package-private | ||
| 37 | super(-1, start, end, s.length()); | ||
| 38 | int n = s.length(); | ||
| 39 | if ((start < 0) || (start > n) || (end < start) || (end > n)) | ||
| 40 | throw new IndexOutOfBoundsException(); | ||
| 41 | str = s; | ||
| 42 | } | ||
| 43 | |||
| 44 | public CharBuffer slice() { | ||
| 45 | return new StringCharBuffer(str, | ||
| 46 | -1, | ||
| 47 | 0, | ||
| 48 | this.remaining(), | ||
| 49 | this.remaining(), | ||
| 50 | offset + this.position()); | ||
| 51 | } | ||
| 52 | |||
| 53 | private StringCharBuffer(CharSequence s, | ||
| 54 | int mark, | ||
| 55 | int pos, | ||
| 56 | int limit, | ||
| 57 | int cap, | ||
| 58 | int offset) { | ||
| 59 | super(mark, pos, limit, cap, null, offset); | ||
| 60 | str = s; | ||
| 61 | } | ||
| 62 | |||
| 63 | public CharBuffer duplicate() { | ||
| 64 | return new StringCharBuffer(str, markValue(), | ||
| 65 | position(), limit(), capacity(), offset); | ||
| 66 | } | ||
| 67 | |||
| 68 | public CharBuffer asReadOnlyBuffer() { | ||
| 69 | return duplicate(); | ||
| 70 | } | ||
| 71 | |||
| 72 | public final char get() { | ||
| 73 | return str.charAt(nextGetIndex() + offset); | ||
| 74 | } | ||
| 75 | |||
| 76 | public final char get(int index) { | ||
| 77 | return str.charAt(checkIndex(index) + offset); | ||
| 78 | } | ||
| 79 | |||
| 80 | // ## Override bulk get methods for better performance | ||
| 81 | |||
| 82 | public final CharBuffer put(char c) { | ||
| 83 | throw new ReadOnlyBufferException(); | ||
| 84 | } | ||
| 85 | |||
| 86 | public final CharBuffer put(int index, char c) { | ||
| 87 | throw new ReadOnlyBufferException(); | ||
| 88 | } | ||
| 89 | |||
| 90 | public final CharBuffer compact() { | ||
| 91 | throw new ReadOnlyBufferException(); | ||
| 92 | } | ||
| 93 | |||
| 94 | public final boolean isReadOnly() { | ||
| 95 | return true; | ||
| 96 | } | ||
| 97 | |||
| 98 | final String toString(int start, int end) { | ||
| 99 | return str.toString().substring(start + offset, end + offset); | ||
| 100 | } | ||
| 101 | |||
| 102 | public final CharBuffer subSequence(int start, int end) { | ||
| 103 | try { | ||
| 104 | int pos = position(); | ||
| 105 | return new StringCharBuffer(str, | ||
| 106 | -1, | ||
| 107 | pos + checkIndex(start, pos), | ||
| 108 | pos + checkIndex(end, pos), | ||
| 109 | capacity(), | ||
| 110 | offset); | ||
| 111 | } catch (IllegalArgumentException x) { | ||
| 112 | throw new IndexOutOfBoundsException(); | ||
| 113 | } | ||
| 114 | } | ||
| 115 | |||
| 116 | public boolean isDirect() { | ||
| 117 | return false; | ||
| 118 | } | ||
| 119 | |||
| 120 | public ByteOrder order() { | ||
| 121 | return ByteOrder.nativeOrder(); | ||
| 122 | } | ||
| 123 | |||
| 124 | } | ||