| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * Copyright (c) 2000, 2013, 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. |
| */ |
| |
| // -- This file was mechanically generated: Do not edit! -- // |
| |
| package java.nio; |
| |
| |
| import java.io.IOException; |
| import java.util.Spliterator; |
| import java.util.stream.StreamSupport; |
| import java.util.stream.IntStream; |
| |
| |
| /** |
| * A char buffer. |
| * |
| * <p> This class defines four categories of operations upon |
| * char buffers: |
| * |
| * <ul> |
| * |
| * <li><p> Absolute and relative {@link #get() </code><i>get</i><code>} and |
| * {@link #put(char) </code><i>put</i><code>} methods that read and write |
| * single chars; </p></li> |
| * |
| * <li><p> Relative {@link #get(char[]) </code><i>bulk get</i><code>} |
| * methods that transfer contiguous sequences of chars from this buffer |
| * into an array; and</p></li> |
| * |
| * <li><p> Relative {@link #put(char[]) </code><i>bulk put</i><code>} |
| * methods that transfer contiguous sequences of chars from a |
| * char array, a string, or some other char |
| * buffer into this buffer; and </p></li> |
| * |
| * <li><p> Methods for {@link #compact </code>compacting<code>}, {@link |
| * #duplicate </code>duplicating<code>}, and {@link #slice |
| * </code>slicing<code>} a char buffer. </p></li> |
| * |
| * </ul> |
| * |
| * <p> Char buffers can be created either by {@link #allocate |
| * </code><i>allocation</i><code>}, which allocates space for the buffer's |
| * content, by {@link #wrap(char[]) </code><i>wrapping</i><code>} an existing |
| * char array or string into a buffer, or by creating a |
| * <a href="ByteBuffer.html#views"><i>view</i></a> of an existing byte buffer. |
| * |
| * <p> Like a byte buffer, a char buffer is either <a |
| * href="ByteBuffer.html#direct"><i>direct</i> or <i>non-direct</i></a>. A |
| * char buffer created via the <tt>wrap</tt> methods of this class will |
| * be non-direct. A char buffer created as a view of a byte buffer will |
| * be direct if, and only if, the byte buffer itself is direct. Whether or not |
| * a char buffer is direct may be determined by invoking the {@link |
| * #isDirect isDirect} method. </p> |
| * |
| * <p> This class implements the {@link CharSequence} interface so that |
| * character buffers may be used wherever character sequences are accepted, for |
| * example in the regular-expression package <tt>{@link java.util.regex}</tt>. |
| * </p> |
| * |
| * <p> Methods in this class that do not otherwise have a value to return are |
| * specified to return the buffer upon which they are invoked. This allows |
| * method invocations to be chained. |
| * |
| * |
| * The sequence of statements |
| * |
| * <blockquote><pre> |
| * cb.put("text/"); |
| * cb.put(subtype); |
| * cb.put("; charset="); |
| * cb.put(enc);</pre></blockquote> |
| * |
| * can, for example, be replaced by the single statement |
| * |
| * <blockquote><pre> |
| * cb.put("text/").put(subtype).put("; charset=").put(enc);</pre></blockquote> |
| * |
| * @author Mark Reinhold |
| * @author JSR-51 Expert Group |
| * @since 1.4 |
| */ |
| |
| public abstract class CharBuffer |
| extends Buffer |
| implements Comparable<CharBuffer>, Appendable, CharSequence, Readable { |
| |
| // These fields are declared here rather than in Heap-X-Buffer in order to |
| // reduce the number of virtual method invocations needed to access these |
| // values, which is especially costly when coding small buffers. |
| // |
| final char[] hb; // Non-null only for heap buffers |
| final int offset; |
| boolean isReadOnly; // Valid only for heap buffers |
| |
| // Creates a new buffer with the given mark, position, limit, capacity, |
| // backing array, and array offset |
| // |
| CharBuffer(int mark, int pos, int lim, int cap, // package-private |
| char[] hb, int offset) { |
| super(mark, pos, lim, cap, 1); |
| this.hb = hb; |
| this.offset = offset; |
| } |
| |
| // Creates a new buffer with the given mark, position, limit, and capacity |
| // |
| CharBuffer(int mark, int pos, int lim, int cap) { // package-private |
| this(mark, pos, lim, cap, null, 0); |
| } |
| |
| |
| /** |
| * Allocates a new char buffer. |
| * |
| * <p> The new buffer's position will be zero, its limit will be its |
| * capacity, its mark will be undefined, and each of its elements will be |
| * initialized to zero. It will have a {@link #array |
| * </code>backing array<code>}, and its {@link #arrayOffset </code>array |
| * offset<code>} will be zero. |
| * |
| * @param capacity The new buffer's capacity, in chars |
| * @return The new char buffer |
| * @throws IllegalArgumentException If the <tt>capacity</tt> is a negative integer |
| */ |
| public static CharBuffer allocate(int capacity) { |
| if (capacity < 0) |
| throw new IllegalArgumentException(); |
| return new HeapCharBuffer(capacity, capacity); |
| } |
| |
| /** |
| * Wraps a char array into a buffer. |
| * |
| * <p> The new buffer will be backed by the given char array; |
| * that is, modifications to the buffer will cause the array to be modified |
| * and vice versa. The new buffer's capacity will be |
| * <tt>array.length</tt>, its position will be <tt>offset</tt>, its limit |
| * will be <tt>offset + length</tt>, and its mark will be undefined. Its |
| * {@link #array </code>backing array<code>} will be the given array, and |
| * its {@link #arrayOffset </code>array offset<code>} will be zero. </p> |
| * |
| * @param array The array that will back the new buffer |
| * @param offset The offset of the subarray to be used; must be non-negative and |
| * no larger than <tt>array.length</tt>. The new buffer's position |
| * will be set to this value. |
| * @param length The length of the subarray to be used; |
| * must be non-negative and no larger than |
| * <tt>array.length - offset</tt>. |
| * The new buffer's limit will be set to <tt>offset + length</tt>. |
| * @return The new char buffer |
| * @throws IndexOutOfBoundsException If the preconditions on the <tt>offset</tt> and |
| * <tt>length</tt> |
| * parameters do not hold |
| */ |
| public static CharBuffer wrap(char[] array, |
| int offset, int length) { |
| try { |
| return new HeapCharBuffer(array, offset, length); |
| } catch (IllegalArgumentException x) { |
| throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| /** |
| * Wraps a char array into a buffer. |
| * |
| * <p> The new buffer will be backed by the given char array; |
| * that is, modifications to the buffer will cause the array to be modified |
| * and vice versa. The new buffer's capacity and limit will be |
| * <tt>array.length</tt>, its position will be zero, and its mark will be |
| * undefined. Its {@link #array </code>backing array<code>} will be the |
| * given array, and its {@link #arrayOffset </code>array offset<code>} will |
| * be zero. </p> |
| * |
| * @param array The array that will back this buffer |
| * @return The new char buffer |
| */ |
| public static CharBuffer wrap(char[] array) { |
| return wrap(array, 0, array.length); |
| } |
| |
| |
| /** |
| * Attempts to read characters into the specified character buffer. |
| * The buffer is used as a repository of characters as-is: the only |
| * changes made are the results of a put operation. No flipping or |
| * rewinding of the buffer is performed. |
| * |
| * @param target the buffer to read characters into |
| * @return The number of characters added to the buffer, or |
| * -1 if this source of characters is at its end |
| * @throws IOException if an I/O error occurs |
| * @throws NullPointerException if target is null |
| * @throws ReadOnlyBufferException if target is a read only buffer |
| * @since 1.5 |
| */ |
| public int read(CharBuffer target) throws IOException { |
| // Determine the number of bytes n that can be transferred |
| int targetRemaining = target.remaining(); |
| int remaining = remaining(); |
| if (remaining == 0) |
| return -1; |
| int n = Math.min(remaining, targetRemaining); |
| int limit = limit(); |
| // Set source limit to prevent target overflow |
| if (targetRemaining < remaining) |
| limit(position() + n); |
| try { |
| if (n > 0) |
| target.put(this); |
| } finally { |
| limit(limit); // restore real limit |
| } |
| return n; |
| } |
| |
| /** |
| * Wraps a character sequence into a buffer. |
| * |
| * <p> The content of the new, read-only buffer will be the content of the |
| * given character sequence. The buffer's capacity will be |
| * <tt>csq.length()</tt>, its position will be <tt>start</tt>, its limit |
| * will be <tt>end</tt>, and its mark will be undefined. </p> |
| * |
| * @param csq The character sequence from which the new character buffer is to |
| * be created |
| * @param start The index of the first character to be used; |
| * must be non-negative and no larger than <tt>csq.length()</tt>. |
| * The new buffer's position will be set to this value. |
| * @param end The index of the character following the last character to be |
| * used; must be no smaller than <tt>start</tt> and no larger |
| * than <tt>csq.length()</tt>. |
| * The new buffer's limit will be set to this value. |
| * @return The new character buffer |
| * @throws IndexOutOfBoundsException If the preconditions on the <tt>start</tt> and |
| * <tt>end</tt> |
| * parameters do not hold |
| */ |
| public static CharBuffer wrap(CharSequence csq, int start, int end) { |
| try { |
| return new StringCharBuffer(csq, start, end); |
| } catch (IllegalArgumentException x) { |
| throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| /** |
| * Wraps a character sequence into a buffer. |
| * |
| * <p> The content of the new, read-only buffer will be the content of the |
| * given character sequence. The new buffer's capacity and limit will be |
| * <tt>csq.length()</tt>, its position will be zero, and its mark will be |
| * undefined. </p> |
| * |
| * @param csq The character sequence from which the new character buffer is to |
| * be created |
| * @return The new character buffer |
| */ |
| public static CharBuffer wrap(CharSequence csq) { |
| return wrap(csq, 0, csq.length()); |
| } |
| |
| |
| /** |
| * Creates a new char buffer whose content is a shared subsequence of |
| * this buffer's content. |
| * |
| * <p> The content of the new buffer will start at this buffer's current |
| * position. Changes to this buffer's content will be visible in the new |
| * buffer, and vice versa; the two buffers' position, limit, and mark |
| * values will be independent. |
| * |
| * <p> The new buffer's position will be zero, its capacity and its limit |
| * will be the number of chars remaining in this buffer, and its mark |
| * will be undefined. The new buffer will be direct if, and only if, this |
| * buffer is direct, and it will be read-only if, and only if, this buffer |
| * is read-only. </p> |
| * |
| * @return The new char buffer |
| */ |
| public abstract CharBuffer slice(); |
| |
| /** |
| * Creates a new char buffer that shares this buffer's content. |
| * |
| * <p> The content of the new buffer will be that of this buffer. Changes |
| * to this buffer's content will be visible in the new buffer, and vice |
| * versa; the two buffers' position, limit, and mark values will be |
| * independent. |
| * |
| * <p> The new buffer's capacity, limit, position, and mark values will be |
| * identical to those of this buffer. The new buffer will be direct if, |
| * and only if, this buffer is direct, and it will be read-only if, and |
| * only if, this buffer is read-only. </p> |
| * |
| * @return The new char buffer |
| */ |
| public abstract CharBuffer duplicate(); |
| |
| /** |
| * Creates a new, read-only char buffer that shares this buffer's |
| * content. |
| * |
| * <p> The content of the new buffer will be that of this buffer. Changes |
| * to this buffer's content will be visible in the new buffer; the new |
| * buffer itself, however, will be read-only and will not allow the shared |
| * content to be modified. The two buffers' position, limit, and mark |
| * values will be independent. |
| * |
| * <p> The new buffer's capacity, limit, position, and mark values will be |
| * identical to those of this buffer. |
| * |
| * <p> If this buffer is itself read-only then this method behaves in |
| * exactly the same way as the {@link #duplicate duplicate} method. </p> |
| * |
| * @return The new, read-only char buffer |
| */ |
| public abstract CharBuffer asReadOnlyBuffer(); |
| |
| |
| // -- Singleton get/put methods -- |
| |
| /** |
| * Relative <i>get</i> method. Reads the char at this buffer's |
| * current position, and then increments the position. </p> |
| * |
| * @return The char at the buffer's current position |
| * @throws BufferUnderflowException If the buffer's current position is not smaller than its |
| * limit |
| */ |
| public abstract char get(); |
| |
| /** |
| * Relative <i>put</i> method <i>(optional operation)</i>. |
| * |
| * <p> Writes the given char into this buffer at the current |
| * position, and then increments the position. </p> |
| * |
| * @param c The char to be written |
| * @return This buffer |
| * @throws BufferOverflowException If this buffer's current position is not smaller than its |
| * limit |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| */ |
| public abstract CharBuffer put(char c); |
| |
| /** |
| * Absolute <i>get</i> method. Reads the char at the given |
| * index. </p> |
| * |
| * @param index The index from which the char will be read |
| * @return The char at the given index |
| * @throws IndexOutOfBoundsException If <tt>index</tt> is negative |
| * or not smaller than the buffer's limit |
| */ |
| public abstract char get(int index); |
| |
| /** |
| * Absolute <i>get</i> method. Reads the char at the given |
| * index without any validation of the index. |
| * |
| * @param index |
| * The index from which the char will be read |
| * |
| * @return The char at the given index |
| */ |
| abstract char getUnchecked(int index); // package-private |
| |
| /** |
| * Absolute <i>put</i> method <i>(optional operation)</i>. |
| * |
| * <p> Writes the given char into this buffer at the given |
| * index. </p> |
| * |
| * @param index The index at which the char will be written |
| * @param c The char value to be written |
| * @return This buffer |
| * @throws IndexOutOfBoundsException If <tt>index</tt> is negative |
| * or not smaller than the buffer's limit |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| */ |
| public abstract CharBuffer put(int index, char c); |
| |
| |
| // -- Bulk get operations -- |
| |
| /** |
| * Relative bulk <i>get</i> method. |
| * |
| * <p> This method transfers chars from this buffer into the given |
| * destination array. If there are fewer chars remaining in the |
| * buffer than are required to satisfy the request, that is, if |
| * <tt>length</tt> <tt>></tt> <tt>remaining()</tt>, then no |
| * chars are transferred and a {@link BufferUnderflowException} is |
| * thrown. |
| * |
| * <p> Otherwise, this method copies <tt>length</tt> chars from this |
| * buffer into the given array, starting at the current position of this |
| * buffer and at the given offset in the array. The position of this |
| * buffer is then incremented by <tt>length</tt>. |
| * |
| * <p> In other words, an invocation of this method of the form |
| * <tt>src.get(dst, off, len)</tt> has exactly the same effect as |
| * the loop |
| * |
| * <pre> |
| * for (int i = off; i < off + len; i++) |
| * dst[i] = src.get(); </pre> |
| * |
| * except that it first checks that there are sufficient chars in |
| * this buffer and it is potentially much more efficient. </p> |
| * |
| * @param dst The array into which chars are to be written |
| * @param offset The offset within the array of the first char to be |
| * written; must be non-negative and no larger than |
| * <tt>dst.length</tt> |
| * @param length The maximum number of chars to be written to the given |
| * array; must be non-negative and no larger than |
| * <tt>dst.length - offset</tt> |
| * @return This buffer |
| * @throws BufferUnderflowException If there are fewer than <tt>length</tt> chars |
| * remaining in this buffer |
| * @throws IndexOutOfBoundsException If the preconditions on the <tt>offset</tt> and |
| * <tt>length</tt> |
| * parameters do not hold |
| */ |
| public CharBuffer get(char[] dst, int offset, int length) { |
| checkBounds(offset, length, dst.length); |
| if (length > remaining()) |
| throw new BufferUnderflowException(); |
| int end = offset + length; |
| for (int i = offset; i < end; i++) |
| dst[i] = get(); |
| return this; |
| } |
| |
| /** |
| * Relative bulk <i>get</i> method. |
| * |
| * <p> This method transfers chars from this buffer into the given |
| * destination array. An invocation of this method of the form |
| * <tt>src.get(a)</tt> behaves in exactly the same way as the invocation |
| * |
| * <pre> |
| * src.get(a, 0, a.length) </pre> |
| * |
| * @return This buffer |
| * @throws BufferUnderflowException If there are fewer than <tt>length</tt> chars |
| * remaining in this buffer |
| */ |
| public CharBuffer get(char[] dst) { |
| return get(dst, 0, dst.length); |
| } |
| |
| |
| // -- Bulk put operations -- |
| |
| /** |
| * Relative bulk <i>put</i> method <i>(optional operation)</i>. |
| * |
| * <p> This method transfers the chars remaining in the given source |
| * buffer into this buffer. If there are more chars remaining in the |
| * source buffer than in this buffer, that is, if |
| * <tt>src.remaining()</tt> <tt>></tt> <tt>remaining()</tt>, |
| * then no chars are transferred and a {@link |
| * BufferOverflowException} is thrown. |
| * |
| * <p> Otherwise, this method copies |
| * <i>n</i> = <tt>src.remaining()</tt> chars from the given |
| * buffer into this buffer, starting at each buffer's current position. |
| * The positions of both buffers are then incremented by <i>n</i>. |
| * |
| * <p> In other words, an invocation of this method of the form |
| * <tt>dst.put(src)</tt> has exactly the same effect as the loop |
| * |
| * <pre> |
| * while (src.hasRemaining()) |
| * dst.put(src.get()); </pre> |
| * |
| * except that it first checks that there is sufficient space in this |
| * buffer and it is potentially much more efficient. </p> |
| * |
| * @param src The source buffer from which chars are to be read; |
| * must not be this buffer |
| * @return This buffer |
| * @throws BufferOverflowException If there is insufficient space in this buffer |
| * for the remaining chars in the source buffer |
| * @throws IllegalArgumentException If the source buffer is this buffer |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| */ |
| public CharBuffer put(CharBuffer src) { |
| if (src == this) |
| throw new IllegalArgumentException(); |
| int n = src.remaining(); |
| if (n > remaining()) |
| throw new BufferOverflowException(); |
| for (int i = 0; i < n; i++) |
| put(src.get()); |
| return this; |
| } |
| |
| /** |
| * Relative bulk <i>put</i> method <i>(optional operation)</i>. |
| * |
| * <p> This method transfers chars into this buffer from the given |
| * source array. If there are more chars to be copied from the array |
| * than remain in this buffer, that is, if |
| * <tt>length</tt> <tt>></tt> <tt>remaining()</tt>, then no |
| * chars are transferred and a {@link BufferOverflowException} is |
| * thrown. |
| * |
| * <p> Otherwise, this method copies <tt>length</tt> chars from the |
| * given array into this buffer, starting at the given offset in the array |
| * and at the current position of this buffer. The position of this buffer |
| * is then incremented by <tt>length</tt>. |
| * |
| * <p> In other words, an invocation of this method of the form |
| * <tt>dst.put(src, off, len)</tt> has exactly the same effect as |
| * the loop |
| * |
| * <pre> |
| * for (int i = off; i < off + len; i++) |
| * dst.put(a[i]); </pre> |
| * |
| * except that it first checks that there is sufficient space in this |
| * buffer and it is potentially much more efficient. </p> |
| * |
| * @param src The array from which chars are to be read |
| * @param offset The offset within the array of the first char to be read; |
| * must be non-negative and no larger than <tt>array.length</tt> |
| * @param length The number of chars to be read from the given array; |
| * must be non-negative and no larger than |
| * <tt>array.length - offset</tt> |
| * @return This buffer |
| * @throws BufferOverflowException If there is insufficient space in this buffer |
| * @throws IndexOutOfBoundsException If the preconditions on the <tt>offset</tt> and |
| * <tt>length</tt> |
| * parameters do not hold |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| */ |
| public CharBuffer put(char[] src, int offset, int length) { |
| checkBounds(offset, length, src.length); |
| if (length > remaining()) |
| throw new BufferOverflowException(); |
| int end = offset + length; |
| for (int i = offset; i < end; i++) |
| this.put(src[i]); |
| return this; |
| } |
| |
| /** |
| * Relative bulk <i>put</i> method <i>(optional operation)</i>. |
| * |
| * <p> This method transfers the entire content of the given source |
| * char array into this buffer. An invocation of this method of the |
| * form <tt>dst.put(a)</tt> behaves in exactly the same way as the |
| * invocation |
| * |
| * <pre> |
| * dst.put(a, 0, a.length) </pre> |
| * |
| * @return This buffer |
| * @throws BufferOverflowException If there is insufficient space in this buffer |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| */ |
| public final CharBuffer put(char[] src) { |
| return put(src, 0, src.length); |
| } |
| |
| |
| /** |
| * Relative bulk <i>put</i> method <i>(optional operation)</i>. |
| * |
| * <p> This method transfers chars from the given string into this |
| * buffer. If there are more chars to be copied from the string than |
| * remain in this buffer, that is, if |
| * <tt>end - start</tt> <tt>></tt> <tt>remaining()</tt>, |
| * then no chars are transferred and a {@link |
| * BufferOverflowException} is thrown. |
| * |
| * <p> Otherwise, this method copies |
| * <i>n</i> = <tt>end</tt> - <tt>start</tt> chars |
| * from the given string into this buffer, starting at the given |
| * <tt>start</tt> index and at the current position of this buffer. The |
| * position of this buffer is then incremented by <i>n</i>. |
| * |
| * <p> In other words, an invocation of this method of the form |
| * <tt>dst.put(src, start, end)</tt> has exactly the same effect |
| * as the loop |
| * |
| * <pre> |
| * for (int i = start; i < end; i++) |
| * dst.put(src.charAt(i)); </pre> |
| * |
| * except that it first checks that there is sufficient space in this |
| * buffer and it is potentially much more efficient. </p> |
| * |
| * @param src The string from which chars are to be read |
| * @param start The offset within the string of the first char to be read; |
| * must be non-negative and no larger than |
| * <tt>string.length()</tt> |
| * @param end The offset within the string of the last char to be read, |
| * plus one; must be non-negative and no larger than |
| * <tt>string.length()</tt> |
| * @return This buffer |
| * @throws BufferOverflowException If there is insufficient space in this buffer |
| * @throws IndexOutOfBoundsException If the preconditions on the <tt>start</tt> and |
| * <tt>end</tt> |
| * parameters do not hold |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| */ |
| public CharBuffer put(String src, int start, int end) { |
| checkBounds(start, end - start, src.length()); |
| |
| // Android changed : Don't bother making changes to the buffer if there's nothing |
| // to write. This is questionable behaviour but code expects it. |
| if (start == end) { |
| return this; |
| } |
| |
| // Android changed : Throw ReadOnlyBufferException as soon as possible. |
| if (isReadOnly()) { |
| throw new ReadOnlyBufferException(); |
| } |
| |
| // Android changed : Throw as early as we can if there isn't enough space. |
| if ((end - start) > remaining()) { |
| throw new BufferOverflowException(); |
| } |
| |
| for (int i = start; i < end; i++) |
| this.put(src.charAt(i)); |
| return this; |
| } |
| |
| /** |
| * Relative bulk <i>put</i> method <i>(optional operation)</i>. |
| * |
| * <p> This method transfers the entire content of the given source string |
| * into this buffer. An invocation of this method of the form |
| * <tt>dst.put(s)</tt> behaves in exactly the same way as the invocation |
| * |
| * <pre> |
| * dst.put(s, 0, s.length()) </pre> |
| * |
| * @return This buffer |
| * @throws BufferOverflowException If there is insufficient space in this buffer |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| */ |
| public final CharBuffer put(String src) { |
| return put(src, 0, src.length()); |
| } |
| |
| |
| // -- Other stuff -- |
| |
| /** |
| * Tells whether or not this buffer is backed by an accessible char |
| * array. |
| * |
| * <p> If this method returns <tt>true</tt> then the {@link #array() array} |
| * and {@link #arrayOffset() arrayOffset} methods may safely be invoked. |
| * </p> |
| * |
| * @return <tt>true</tt> if, and only if, this buffer |
| * is backed by an array and is not read-only |
| */ |
| public final boolean hasArray() { |
| return (hb != null) && !isReadOnly; |
| } |
| |
| /** |
| * Returns the char array that backs this |
| * buffer <i>(optional operation)</i>. |
| * |
| * <p> Modifications to this buffer's content will cause the returned |
| * array's content to be modified, and vice versa. |
| * |
| * <p> Invoke the {@link #hasArray hasArray} method before invoking this |
| * method in order to ensure that this buffer has an accessible backing |
| * array. </p> |
| * |
| * @return The array that backs this buffer |
| * @throws ReadOnlyBufferException If this buffer is backed by an array but is read-only |
| * @throws UnsupportedOperationException If this buffer is not backed by an accessible array |
| */ |
| public final char[] array() { |
| if (hb == null) |
| throw new UnsupportedOperationException(); |
| if (isReadOnly) |
| throw new ReadOnlyBufferException(); |
| return hb; |
| } |
| |
| /** |
| * Returns the offset within this buffer's backing array of the first |
| * element of the buffer <i>(optional operation)</i>. |
| * |
| * <p> If this buffer is backed by an array then buffer position <i>p</i> |
| * corresponds to array index <i>p</i> + <tt>arrayOffset()</tt>. |
| * |
| * <p> Invoke the {@link #hasArray hasArray} method before invoking this |
| * method in order to ensure that this buffer has an accessible backing |
| * array. </p> |
| * |
| * @return The offset within this buffer's array |
| * of the first element of the buffer |
| * @throws ReadOnlyBufferException If this buffer is backed by an array but is read-only |
| * @throws UnsupportedOperationException If this buffer is not backed by an accessible array |
| */ |
| public final int arrayOffset() { |
| if (hb == null) |
| throw new UnsupportedOperationException(); |
| if (isReadOnly) |
| throw new ReadOnlyBufferException(); |
| return offset; |
| } |
| |
| /** |
| * Compacts this buffer <i>(optional operation)</i>. |
| * |
| * <p> The chars between the buffer's current position and its limit, |
| * if any, are copied to the beginning of the buffer. That is, the |
| * char at index <i>p</i> = <tt>position()</tt> is copied |
| * to index zero, the char at index <i>p</i> + 1 is copied |
| * to index one, and so forth until the char at index |
| * <tt>limit()</tt> - 1 is copied to index |
| * <i>n</i> = <tt>limit()</tt> - <tt>1</tt> - <i>p</i>. |
| * The buffer's position is then set to <i>n+1</i> and its limit is set to |
| * its capacity. The mark, if defined, is discarded. |
| * |
| * <p> The buffer's position is set to the number of chars copied, |
| * rather than to zero, so that an invocation of this method can be |
| * followed immediately by an invocation of another relative <i>put</i> |
| * method. </p> |
| * |
| * @return This buffer |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| */ |
| public abstract CharBuffer compact(); |
| |
| /** |
| * Tells whether or not this char buffer is direct. </p> |
| * |
| * @return <tt>true</tt> if, and only if, this buffer is direct |
| */ |
| public abstract boolean isDirect(); |
| |
| |
| /** |
| * Returns the current hash code of this buffer. |
| * |
| * <p> The hash code of a char buffer depends only upon its remaining |
| * elements; that is, upon the elements from <tt>position()</tt> up to, and |
| * including, the element at <tt>limit()</tt> - <tt>1</tt>. |
| * |
| * <p> Because buffer hash codes are content-dependent, it is inadvisable |
| * to use buffers as keys in hash maps or similar data structures unless it |
| * is known that their contents will not change. </p> |
| * |
| * @return The current hash code of this buffer |
| */ |
| public int hashCode() { |
| int h = 1; |
| int p = position(); |
| for (int i = limit() - 1; i >= p; i--) |
| h = 31 * h + (int) get(i); |
| return h; |
| } |
| |
| /** |
| * Tells whether or not this buffer is equal to another object. |
| * |
| * <p> Two char buffers are equal if, and only if, |
| * |
| * <p><ol> |
| * |
| * <li><p> They have the same element type, </p></li> |
| * |
| * <li><p> They have the same number of remaining elements, and |
| * </p></li> |
| * |
| * <li><p> The two sequences of remaining elements, considered |
| * independently of their starting positions, are pointwise equal. |
| * |
| * |
| * |
| * |
| * |
| * |
| * |
| * </p></li> |
| * |
| * </ol> |
| * |
| * <p> A char buffer is not equal to any other type of object. </p> |
| * |
| * @param ob The object to which this buffer is to be compared |
| * @return <tt>true</tt> if, and only if, this buffer is equal to the |
| * given object |
| */ |
| public boolean equals(Object ob) { |
| if (this == ob) |
| return true; |
| if (!(ob instanceof CharBuffer)) |
| return false; |
| CharBuffer that = (CharBuffer) ob; |
| if (this.remaining() != that.remaining()) |
| return false; |
| int p = this.position(); |
| for (int i = this.limit() - 1, j = that.limit() - 1; i >= p; i--, j--) |
| if (!equals(this.get(i), that.get(j))) |
| return false; |
| return true; |
| } |
| |
| private static boolean equals(char x, char y) { |
| |
| |
| return x == y; |
| |
| } |
| |
| /** |
| * Compares this buffer to another. |
| * |
| * <p> Two char buffers are compared by comparing their sequences of |
| * remaining elements lexicographically, without regard to the starting |
| * position of each sequence within its corresponding buffer. |
| * |
| * |
| * |
| * |
| * |
| * |
| * |
| * |
| * Pairs of {@code char} elements are compared as if by invoking |
| * {@link Character#compare(char, char)}. |
| * |
| * |
| * <p> A char buffer is not comparable to any other type of object. |
| * |
| * @return A negative integer, zero, or a positive integer as this buffer |
| * is less than, equal to, or greater than the given buffer |
| */ |
| public int compareTo(CharBuffer that) { |
| int n = this.position() + Math.min(this.remaining(), that.remaining()); |
| for (int i = this.position(), j = that.position(); i < n; i++, j++) { |
| int cmp = compare(this.get(i), that.get(j)); |
| if (cmp != 0) |
| return cmp; |
| } |
| return this.remaining() - that.remaining(); |
| } |
| |
| private static int compare(char x, char y) { |
| |
| |
| return Character.compare(x, y); |
| |
| } |
| |
| // -- Other char stuff -- |
| |
| |
| /** |
| * Returns a string containing the characters in this buffer. |
| * |
| * <p> The first character of the resulting string will be the character at |
| * this buffer's position, while the last character will be the character |
| * at index <tt>limit()</tt> - 1. Invoking this method does not |
| * change the buffer's position. </p> |
| * |
| * @return The specified string |
| */ |
| public String toString() { |
| return toString(position(), limit()); |
| } |
| |
| abstract String toString(int start, int end); // package-private |
| |
| |
| // --- Methods to support CharSequence --- |
| |
| /** |
| * Returns the length of this character buffer. |
| * |
| * <p> When viewed as a character sequence, the length of a character |
| * buffer is simply the number of characters between the position |
| * (inclusive) and the limit (exclusive); that is, it is equivalent to |
| * <tt>remaining()</tt>. </p> |
| * |
| * @return The length of this character buffer |
| */ |
| public final int length() { |
| return remaining(); |
| } |
| |
| /** |
| * Reads the character at the given index relative to the current |
| * position. </p> |
| * |
| * @param index The index of the character to be read, relative to the position; |
| * must be non-negative and smaller than <tt>remaining()</tt> |
| * @return The character at index |
| * <tt>position() + index</tt> |
| * @throws IndexOutOfBoundsException If the preconditions on <tt>index</tt> do not hold |
| */ |
| public final char charAt(int index) { |
| return get(position() + checkIndex(index, 1)); |
| } |
| |
| /** |
| * Creates a new character buffer that represents the specified subsequence |
| * of this buffer, relative to the current position. |
| * |
| * <p> The new buffer will share this buffer's content; that is, if the |
| * content of this buffer is mutable then modifications to one buffer will |
| * cause the other to be modified. The new buffer's capacity will be that |
| * of this buffer, its position will be |
| * <tt>position()</tt> + <tt>start</tt>, and its limit will be |
| * <tt>position()</tt> + <tt>end</tt>. The new buffer will be |
| * direct if, and only if, this buffer is direct, and it will be read-only |
| * if, and only if, this buffer is read-only. </p> |
| * |
| * @param start The index, relative to the current position, of the first |
| * character in the subsequence; must be non-negative and no larger |
| * than <tt>remaining()</tt> |
| * @param end The index, relative to the current position, of the character |
| * following the last character in the subsequence; must be no |
| * smaller than <tt>start</tt> and no larger than |
| * <tt>remaining()</tt> |
| * @return The new character buffer |
| * @throws IndexOutOfBoundsException If the preconditions on <tt>start</tt> and <tt>end</tt> |
| * do not hold |
| */ |
| public abstract CharBuffer subSequence(int start, int end); |
| |
| |
| // --- Methods to support Appendable --- |
| |
| /** |
| * Appends the specified character sequence to this |
| * buffer <i>(optional operation)</i>. |
| * |
| * <p> An invocation of this method of the form <tt>dst.append(csq)</tt> |
| * behaves in exactly the same way as the invocation |
| * |
| * <pre> |
| * dst.put(csq.toString()) </pre> |
| * |
| * <p> Depending on the specification of <tt>toString</tt> for the |
| * character sequence <tt>csq</tt>, the entire sequence may not be |
| * appended. For instance, invoking the {@link CharBuffer#toString() |
| * toString} method of a character buffer will return a subsequence whose |
| * content depends upon the buffer's position and limit. |
| * |
| * @param csq The character sequence to append. If <tt>csq</tt> is |
| * <tt>null</tt>, then the four characters <tt>"null"</tt> are |
| * appended to this character buffer. |
| * @return This buffer |
| * @throws BufferOverflowException If there is insufficient space in this buffer |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| * @since 1.5 |
| */ |
| public CharBuffer append(CharSequence csq) { |
| if (csq == null) |
| return put("null"); |
| else |
| return put(csq.toString()); |
| } |
| |
| /** |
| * Appends a subsequence of the specified character sequence to this |
| * buffer <i>(optional operation)</i>. |
| * |
| * <p> An invocation of this method of the form <tt>dst.append(csq, start, |
| * end)</tt> when <tt>csq</tt> is not <tt>null</tt>, behaves in exactly the |
| * same way as the invocation |
| * |
| * <pre> |
| * dst.put(csq.subSequence(start, end).toString()) </pre> |
| * |
| * @param csq The character sequence from which a subsequence will be |
| * appended. If <tt>csq</tt> is <tt>null</tt>, then characters |
| * will be appended as if <tt>csq</tt> contained the four |
| * characters <tt>"null"</tt>. |
| * @return This buffer |
| * @throws BufferOverflowException If there is insufficient space in this buffer |
| * @throws IndexOutOfBoundsException If <tt>start</tt> or <tt>end</tt> are negative, |
| * <tt>start</tt> |
| * is greater than <tt>end</tt>, or <tt>end</tt> is greater |
| * than |
| * <tt>csq.length()</tt> |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| * @since 1.5 |
| */ |
| public CharBuffer append(CharSequence csq, int start, int end) { |
| CharSequence cs = (csq == null ? "null" : csq); |
| return put(cs.subSequence(start, end).toString()); |
| } |
| |
| /** |
| * Appends the specified char to this |
| * buffer <i>(optional operation)</i>. |
| * |
| * <p> An invocation of this method of the form <tt>dst.append(c)</tt> |
| * behaves in exactly the same way as the invocation |
| * |
| * <pre> |
| * dst.put(c) </pre> |
| * |
| * @param c The 16-bit char to append |
| * @return This buffer |
| * @throws BufferOverflowException If there is insufficient space in this buffer |
| * @throws ReadOnlyBufferException If this buffer is read-only |
| * @since 1.5 |
| */ |
| public CharBuffer append(char c) { |
| return put(c); |
| } |
| |
| |
| // -- Other byte stuff: Access to binary data -- |
| |
| |
| /** |
| * Retrieves this buffer's byte order. |
| * |
| * <p> The byte order of a char buffer created by allocation or by |
| * wrapping an existing <tt>char</tt> array is the {@link |
| * ByteOrder#nativeOrder </code>native order<code>} of the underlying |
| * hardware. The byte order of a char buffer created as a <a |
| * href="ByteBuffer.html#views">view</a> of a byte buffer is that of the |
| * byte buffer at the moment that the view is created. </p> |
| * |
| * @return This buffer's byte order |
| */ |
| public abstract ByteOrder order(); |
| |
| @Override |
| public IntStream chars() { |
| CharBuffer self = this; |
| return StreamSupport.intStream(() -> new CharBufferSpliterator(self), |
| Buffer.SPLITERATOR_CHARACTERISTICS, false); |
| } |
| } |
