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-rw-r--r--libjava/classpath/java/nio/CharSequenceBuffer.java207
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diff --git a/libjava/classpath/java/nio/CharSequenceBuffer.java b/libjava/classpath/java/nio/CharSequenceBuffer.java
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-/* CharBuffer.java --
- Copyright (C) 2007 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath 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 for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package java.nio;
-
-/**
- * A CharBuffer that wraps a {@link CharSequence}.
- */
-final class CharSequenceBuffer
- extends CharBuffer
-{
-
- /**
- * The wrapped char sequence.
- */
- private final CharSequence charSequence;
-
- /**
- * Creates a new CharSequenceBuffer.
- *
- * @param charSeq the CharSequence to wrap
- * @param capacity the capacity
- * @param limit the limit
- * @param position the position
- * @param mark the mark
- * @param offs the offset
- */
- CharSequenceBuffer(CharSequence charSeq, int capacity, int limit,
- int position, int mark, int offs)
- {
- super(capacity, limit, position, mark, null, null, offs);
- this.charSequence = charSeq;
- }
-
- /**
- * Creates a new instance of CharSequenceBuffer, wrapping the specified
- * {@link CharSequence}.
- *
- * @param charSeq the char sequence to wrap
- * @param start the start index in the char sequence
- * @param end the end index in the char sequence
- */
- CharSequenceBuffer(CharSequence charSeq, int start, int end)
- {
- this(charSeq, charSeq.length(), end, start, -1, 0);
- }
-
- /**
- * Returns a read-only view of this buffer.
- */
- public CharBuffer asReadOnlyBuffer()
- {
- return duplicate();
- }
-
- /**
- * This buffer class is not writable by definition and thus throws
- * a ReadOnlyBufferException here.
- */
- public CharBuffer compact()
- {
- throw new ReadOnlyBufferException();
- }
-
- /**
- * Returns a duplicate of this buffer.
- *
- * @return a duplicate of this buffer
- */
- public CharBuffer duplicate()
- {
- return new CharSequenceBuffer(charSequence, capacity(), limit, pos, mark, 0);
- }
-
- /**
- * Returns the character at the current position.
- *
- * @return the character at the current position
- */
- public char get()
- {
- if (pos >= limit)
- throw new BufferUnderflowException();
-
- return charSequence.charAt(array_offset + pos++);
- }
-
- /**
- * Returns the character at the specified position.
- *
- * @return the character at the specified position
- */
- public char get(int index)
- {
- if (index < 0 || index >= limit)
- throw new IndexOutOfBoundsException();
-
- return charSequence.charAt(array_offset + index);
- }
-
- /**
- * Cannot be direct, return <code>false</code> here.
- *
- * @return false
- */
- public boolean isDirect()
- {
- return false;
- }
-
- /**
- * Returns the byte order of this buffer. This is always the native byte
- * order.
- *
- * @return the byte order of this buffer
- */
- public ByteOrder order()
- {
- return ByteOrder.nativeOrder();
- }
-
- /**
- * This buffer class is not writable by definition and thus throws
- * a ReadOnlyBufferException here.
- */
- public CharBuffer put(char b)
- {
- throw new ReadOnlyBufferException();
- }
-
- /**
- * This buffer class is not writable by definition and thus throws
- * a ReadOnlyBufferException here.
- */
- public CharBuffer put(int index, char b)
- {
- throw new ReadOnlyBufferException();
- }
-
- /**
- * Returns a slice of this buffer, exposing the current position and limit.
- */
- public CharBuffer slice()
- {
- int newCapacity = limit - pos;
- return new CharSequenceBuffer(charSequence, newCapacity, newCapacity, 0,
- -1, pos);
- }
-
- /**
- * Returns a sub sequence from the specified start index and with the
- * specified length.
- *
- * @param start the start index
- * @param length the length of the sub sequence
- */
- public CharSequence subSequence(int start, int length)
- {
- int begin = array_offset + start + pos;
- return charSequence.subSequence(begin, begin + length);
- }
-
- /**
- * This kind of CharBuffer is read-only, so we return <code>true</code>
- * here.
- */
- public boolean isReadOnly()
- {
- return true;
- }
-
-}