Source Code Cross Referenced for StringCharBuffer.java in  » 6.0-JDK-Core » io-nio » java » nio » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Core » io nio » java.nio 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001        /*
002         * Copyright 2000-2005 Sun Microsystems, Inc.  All Rights Reserved.
003         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004         *
005         * This code is free software; you can redistribute it and/or modify it
006         * under the terms of the GNU General Public License version 2 only, as
007         * published by the Free Software Foundation.  Sun designates this
008         * particular file as subject to the "Classpath" exception as provided
009         * by Sun in the LICENSE file that accompanied this code.
010         *
011         * This code is distributed in the hope that it will be useful, but WITHOUT
012         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013         * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
014         * version 2 for more details (a copy is included in the LICENSE file that
015         * accompanied this code).
016         *
017         * You should have received a copy of the GNU General Public License version
018         * 2 along with this work; if not, write to the Free Software Foundation,
019         * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020         *
021         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022         * CA 95054 USA or visit www.sun.com if you need additional information or
023         * have any questions.
024         */
025
026        package java.nio;
027
028        // ## If the sequence is a string, use reflection to share its array
029
030        class StringCharBuffer // package-private
031                extends CharBuffer {
032            CharSequence str;
033
034            StringCharBuffer(CharSequence s, int start, int end) { // package-private
035                super (-1, start, end, s.length());
036                int n = s.length();
037                if ((start < 0) || (start > n) || (end < start) || (end > n))
038                    throw new IndexOutOfBoundsException();
039                str = s;
040            }
041
042            public CharBuffer slice() {
043                return new StringCharBuffer(str, -1, 0, this .remaining(), this 
044                        .remaining(), this .position());
045            }
046
047            private StringCharBuffer(CharSequence s, int mark, int pos,
048                    int limit, int cap, int offset) {
049                super (mark, pos, limit, cap, null, offset);
050                str = s;
051            }
052
053            private StringCharBuffer(CharSequence s, int mark, int pos,
054                    int limit, int cap) {
055                super (mark, pos, limit, cap);
056                str = s;
057            }
058
059            public CharBuffer duplicate() {
060                return new StringCharBuffer(str, markValue(), position(),
061                        limit(), capacity());
062            }
063
064            public CharBuffer asReadOnlyBuffer() {
065                return duplicate();
066            }
067
068            public final char get() {
069                return str.charAt(nextGetIndex());
070            }
071
072            public final char get(int index) {
073                return str.charAt(checkIndex(index));
074            }
075
076            // ## Override bulk get methods for better performance
077
078            public final CharBuffer put(char c) {
079                throw new ReadOnlyBufferException();
080            }
081
082            public final CharBuffer put(int index, char c) {
083                throw new ReadOnlyBufferException();
084            }
085
086            public final CharBuffer compact() {
087                throw new ReadOnlyBufferException();
088            }
089
090            public final boolean isReadOnly() {
091                return true;
092            }
093
094            final String toString(int start, int end) {
095                return str.toString().substring(start, end);
096            }
097
098            public final CharSequence subSequence(int start, int end) {
099                try {
100                    int pos = position();
101                    return new StringCharBuffer(str, pos
102                            + checkIndex(start, pos), pos
103                            + checkIndex(end, pos));
104                } catch (IllegalArgumentException x) {
105                    throw new IndexOutOfBoundsException();
106                }
107            }
108
109            public boolean isDirect() {
110                return false;
111            }
112
113            public ByteOrder order() {
114                return ByteOrder.nativeOrder();
115            }
116
117        }
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