org.glassfish.grizzly.Buffer Maven / Gradle / Ivy
/*
* Copyright (c) 2008, 2017 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.grizzly;
import java.nio.BufferOverflowException;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.InvalidMarkException;
import java.nio.ReadOnlyBufferException;
import java.nio.charset.Charset;
import org.glassfish.grizzly.asyncqueue.WritableMessage;
import org.glassfish.grizzly.memory.BufferArray;
import org.glassfish.grizzly.memory.ByteBufferArray;
import org.glassfish.grizzly.memory.CompositeBuffer;
/**
* JDK {@link ByteBuffer} was taken as base for Grizzly
* Buffer interface, but Buffer has several extensions:
* it's possible to prepend some data to a Buffer and release Buffer, when
* it's not required any more.
*
* @author Alexey Stashok
*/
public interface Buffer extends Comparable, WritableMessage {
/**
* @return {@code true} if this {@link Buffer} represents a composite
* of individual {@link Buffer} instances.
*/
boolean isComposite();
/**
* Prepend data from header.position() to header.limit() to the
* current buffer. This will change the value returned by buffer()!
* @throws IllegalArgumentException if header.limit() - header.position()
* is greater than headerSize.
*/
Buffer prepend(Buffer header);
/**
* Trim the buffer by reducing capacity to position, if possible.
* May return without changing capacity. Also resets the position to 0,
* like {@link #flip()}.
*/
void trim();
/**
* Disposes the buffer part, outside [position, limit] interval if possible.
* May return without changing capacity.
* After shrink is called, position/limit/capacity values may have
* different values, than before, but still point to the same Buffer
* elements.
*/
void shrink();
/**
* Split up the buffer into two parts: [0..splitPosition) and [splitPosition, capacity).
* This Buffer will represent the first part: [0..splitPosition) and
* returned Buffer will represent the second part: [splitPosition, capacity).
*
* Splitting a buffer will reset the mark if the mark is greater than or equal to the
* splitPosition.
*
* @param splitPosition position of split.
*
* @return the Buffer, which represents split part [splitPosition, capacity)
*/
Buffer split(int splitPosition);
boolean allowBufferDispose();
void allowBufferDispose(boolean allowBufferDispose);
/**
* Tells whether or not this buffer is
* direct.
*
* @return true if, and only if, this buffer is direct
*/
boolean isDirect();
/**
* Try to dispose Buffer if it's allowed.
*/
boolean tryDispose();
/**
* Notify the allocator that the space for this Buffer is no
* longer needed. All calls to methods on a Buffer
* will fail after a call to dispose().
*/
void dispose();
/**
* Return the underlying buffer
*
* @return the underlying buffer
*/
Object underlying();
/**
* Returns this buffer's capacity.
*
* @return The capacity of this buffer
*/
int capacity();
/**
* Returns this buffer's position.
*
* @return The position of this buffer
*/
int position();
/**
* Sets this buffer's position. If the mark is defined and larger than the
* new position then it is discarded.
*
* @param newPosition
* The new position value; must be non-negative
* and no larger than the current limit
*
* @return This buffer
*
* @throws IllegalArgumentException
* If the preconditions on newPosition do not hold
*/
Buffer position(int newPosition);
/**
* Returns this buffer's limit.
*
* @return The limit of this buffer
*/
int limit();
/**
* Sets this buffer's limit. If the position is larger than the new limit
* then it is set to the new limit. If the mark is defined and larger than
* the new limit then it is discarded.
*
* @param newLimit
* The new limit value; must be non-negative
* and no larger than this buffer's capacity
*
* @return This buffer
*
* @throws IllegalArgumentException
* If the preconditions on newLimit do not hold
*/
Buffer limit(int newLimit);
/**
* Sets this buffer's mark at its position.
*
* @return This buffer
*/
Buffer mark();
/**
* Resets this buffer's position to the previously-marked position.
*
* Invoking this method neither changes nor discards the mark's
* value.
*
* @return This buffer
*
* @throws InvalidMarkException If the mark has not been set
*/
Buffer reset();
/**
* Clears this buffer. The position is set to zero, the limit is set to
* the capacity, and the mark is discarded.
*
* Invoke this method before using a sequence of channel-read or
* put operations to fill this buffer. For example:
*
*
* buf.clear(); // Prepare buffer for reading
* in.read(buf); // Read data
*
* This method does not actually erase the data in the buffer, but it
* is named as if it did because it will most often be used in situations
* in which that might as well be the case.
*
* @return This buffer
*/
Buffer clear();
/**
* Flips this buffer. The limit is set to the current position and then
* the position is set to zero. If the mark is defined then it is
* discarded.
*
* After a sequence of channel-read or put operations, invoke
* this method to prepare for a sequence of channel-write or relative
* get operations. For example:
*
*
* buf.put(magic); // Prepend header
* in.read(buf); // Read data into rest of buffer
* buf.flip(); // Flip buffer
* out.write(buf); // Write header + data to channel
*
* This method is often used in conjunction with the
* {@link Buffer#compact compact} method when transferring data from
* one place to another.
*
* @return This buffer
*/
Buffer flip();
/**
* Rewinds this buffer. The position is set to zero and the mark is
* discarded.
*
* Invoke this method before a sequence of channel-write or get
* operations, assuming that the limit has already been set
* appropriately. For example:
*
*
* out.write(buf); // Write remaining data
* buf.rewind(); // Rewind buffer
* buf.get(array); // Copy data into array
*
* @return This buffer
*/
Buffer rewind();
/**
* Returns the number of elements between the current position and the
* limit.
*
* @return The number of elements remaining in this buffer
*/
int remaining();
/**
* Tells whether there are any elements between the current position and
* the limit.
*
* @return true if, and only if, there is at least one element
* remaining in this buffer
*/
boolean hasRemaining();
/**
* Tells whether or not this buffer is read-only.
*
* @return true if, and only if, this buffer is read-only
*/
@SuppressWarnings("UnusedDeclaration")
boolean isReadOnly();
/**
* Creates a new Buffer whose content is a shared subsequence
* of this buffer's content.
*
* 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.
*
*
The new buffer's position will be zero, its capacity and its limit
* will be the number of bytes 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.
*
* @return The new Buffer
*/
Buffer slice();
/**
* Creates a new Buffer whose content is a shared subsequence of
* this buffer's content.
*
* The content of the new buffer will start at passed position and end
* at passed limit.
* Changes to this buffer's content will be visible in the new
* buffer, and vice versa; the two buffer's position, limit, and mark
* values will be independent.
*
*
The new buffer's position will be zero, its capacity and its limit
* will be the number of bytes 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.
*
* @return The new Buffer
*/
Buffer slice(int position, int limit);
/**
* Creates a new Buffer that shares this buffer's content.
*
* 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 buffer's position, limit, and mark values will be
* independent.
*
*
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.
*
* @return The new Buffer
*/
Buffer duplicate();
/**
* Creates a new, read-only Buffer that shares this buffer's
* content.
*
* 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 buffer's position, limit, and mark
* values will be independent.
*
*
The new buffer's capacity, limit, position, and mark values will be
* identical to those of this buffer.
*
*
If this buffer is itself read-only then this method behaves in
* exactly the same way as the {@link #duplicate duplicate} method.
*
* @return The new, read-only Buffer
*/
@SuppressWarnings("UnusedDeclaration")
Buffer asReadOnlyBuffer();
// -- Singleton get/put methods --
/**
* Relative get method. Reads the byte at this buffer's
* current position, and then increments the position.
*
* @return The byte at the buffer's current position
*
* @throws BufferUnderflowException
* If the buffer's current position is not smaller than its limit
*/
byte get();
/**
* Relative put method (optional operation).
*
* Writes the given byte into this buffer at the current
* position, and then increments the position.
*
* @param b
* The byte 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
*/
Buffer put(byte b);
/**
* Absolute get method. Reads the byte at the given
* index.
*
* @param index
* The index from which the byte will be read
*
* @return The byte at the given index
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit
*/
byte get(int index);
/**
* Absolute put method (optional operation).
*
* Writes the given byte into this buffer at the given
* index.
*
* @param index
* The index at which the byte will be written
*
* @param b
* The byte value to be written
*
* @return This buffer
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer put(int index, byte b);
// -- Bulk get operations --
/**
* Relative bulk get method.
*
* This method transfers bytes from this buffer into the given
* destination array. An invocation of this method of the form
* src.get(a) behaves in exactly the same way as the invocation
*
*
* src.get(a, 0, a.length)
*
* @return This buffer
*
* @throws BufferUnderflowException
* If there are fewer than length bytes
* remaining in this buffer
*/
Buffer get(byte[] dst);
/**
* Relative bulk get method.
*
* This method transfers bytes from this buffer into the given
* destination array. If there are fewer bytes remaining in the
* buffer than are required to satisfy the request, that is, if
* length > remaining(), then no
* bytes are transferred and a {@link BufferUnderflowException} is
* thrown.
*
*
Otherwise, this method copies length bytes 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 length.
*
*
In other words, an invocation of this method of the form
* src.get(dst, off, len) has exactly the same effect as
* the loop
*
*
* for (int i = off; i < off + len; i++)
* dst[i] = src.get();
*
* except that it first checks that there are sufficient bytes in
* this buffer and it is potentially much more efficient.
*
* @param dst
* The array into which bytes are to be written
*
* @param offset
* The offset within the array of the first byte to be
* written; must be non-negative and no larger than
* dst.length
*
* @param length
* The maximum number of bytes to be written to the given
* array; must be non-negative and no larger than
* dst.length - offset
*
* @return This buffer
*
* @throws BufferUnderflowException
* If there are fewer than length bytes
* remaining in this buffer
*
* @throws IndexOutOfBoundsException
* If the preconditions on the offset and length
* parameters do not hold
*/
Buffer get(byte[] dst, int offset, int length);
/**
* Relative bulk get method.
*
* This method transfers bytes from this buffer into the given
* destination {@link ByteBuffer}. An invocation of this method of the form
* src.get(a) behaves in exactly the same way as the invocation
*
*
* src.get(a, 0, a.remaining())
*
* @return This buffer
*
* @throws BufferUnderflowException
* If there are fewer than length bytes
* remaining in this buffer
*/
Buffer get(ByteBuffer dst);
/**
* Relative bulk get method.
*
* This method transfers bytes from this buffer into the given
* destination {@link ByteBuffer}. If there are fewer bytes remaining in the
* buffer than are required to satisfy the request, that is, if
* length > remaining(), then no
* bytes are transferred and a {@link BufferUnderflowException} is
* thrown.
*
*
Otherwise, this method copies length bytes from this
* buffer into the given {@link ByteBuffer}, starting at the current position of this
* buffer and at the given offset in the {@link ByteBuffer}. The position of this
* buffer is then incremented by length.
*
*
In other words, an invocation of this method of the form
* src.get(dst, off, len) has exactly the same effect as
* the loop
*
*
* for (int i = off; i < off + len; i++)
* dst.put(i) = src.get();
*
* except that it first checks that there are sufficient bytes in
* this buffer and it is potentially much more efficient.
*
* @param dst
* The {@link ByteBuffer} into which bytes are to be written
*
* @param offset
* The offset within the {@link ByteBuffer} of the first byte to be
* written; must be non-negative and no larger than
* dst.remaining()
*
* @param length
* The maximum number of bytes to be written to the given
* array; must be non-negative and no larger than
* dst.remaining() - offset
*
* @return This buffer
*
* @throws BufferUnderflowException
* If there are fewer than length bytes
* remaining in this buffer
*
* @throws IndexOutOfBoundsException
* If the preconditions on the offset and length
* parameters do not hold
*/
Buffer get(ByteBuffer dst, int offset, int length);
// -- Bulk put operations --
/**
* Relative bulk put method (optional operation).
*
* This method transfers the bytes remaining in the given source
* buffer into this buffer. If there are more bytes remaining in the
* source buffer than in this buffer, that is, if
* src.remaining() > remaining(),
* then no bytes are transferred and a {@link
* BufferOverflowException} is thrown.
*
*
Otherwise, this method copies
* n = src.remaining() bytes from the given
* buffer into this buffer, starting at each buffer's current position.
* The positions of both buffers are then incremented by n.
*
*
In other words, an invocation of this method of the form
* dst.put(src) has exactly the same effect as the loop
*
*
* while (src.hasRemaining())
* dst.put(src.get());
*
* except that it first checks that there is sufficient space in this
* buffer and it is potentially much more efficient.
*
* @param src
* The source buffer from which bytes 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 bytes in the source buffer
*
* @throws IllegalArgumentException
* If the source buffer is this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer put(Buffer src);
// -- Bulk put operations --
/**
* Relative bulk put method (optional operation).
*
* This method transfers the "length" bytes from the given source
* buffer into this buffer. If this buffer has less bytes remaining than
* length, that is, if
* length > remaining(),
* then no bytes are transferred and a {@link
* BufferOverflowException} is thrown.
*
*
Otherwise, this method copies
* n = length bytes from the given
* postion in the source buffer into this buffer, starting from
* the current buffer position.
* The positions of this buffer is then incremented by length.
*
*
In other words, an invocation of this method of the form
* dst.put(src, position, length) has exactly the same effect
* as the loop
*
*
* for (int i = 0; i < length; i++)
* dst.put(src.get(i + position));
*
* except that it first checks that there is sufficient space in this
* buffer and it is potentially much more efficient.
*
* @param src
* The source buffer from which bytes are to be read;
* must not be this buffer
*
* @param position starting position in the source buffer
*
* @param length number of bytes to be copied
*
* @return This buffer
*
* @throws BufferOverflowException
* If there is insufficient space in this buffer
* for the remaining bytes in the source buffer
*
* @throws IllegalArgumentException
* If the source buffer is this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer put(Buffer src, int position, int length);
// -- Bulk put operations --
/**
* Relative bulk put method (optional operation).
*
* This method transfers the bytes remaining in the given source
* buffer into this buffer. If there are more bytes remaining in the
* source buffer than in this buffer, that is, if
* src.remaining() > remaining(),
* then no bytes are transferred and a {@link
* BufferOverflowException} is thrown.
*
*
Otherwise, this method copies
* n = src.remaining() bytes from the given
* buffer into this buffer, starting at each buffer's current position.
* The positions of both buffers are then incremented by n.
*
*
In other words, an invocation of this method of the form
* dst.put(src) has exactly the same effect as the loop
*
*
* while (src.hasRemaining())
* dst.put(src.get());
*
* except that it first checks that there is sufficient space in this
* buffer and it is potentially much more efficient.
*
* @param src
* The source buffer from which bytes 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 bytes in the source buffer
*
* @throws IllegalArgumentException
* If the source buffer is this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer put(ByteBuffer src);
// -- Bulk put operations --
/**
* Relative bulk put method (optional operation).
*
* This method transfers the "length" bytes from the given source
* buffer into this buffer. If this buffer has less bytes remaining than
* length, that is, if
* length > remaining(),
* then no bytes are transferred and a {@link
* BufferOverflowException} is thrown.
*
*
Otherwise, this method copies
* n = length bytes from the given
* postion in the source buffer into this buffer, starting from
* the current buffer position.
* The positions of this buffer is then incremented by length.
*
*
In other words, an invocation of this method of the form
* dst.put(src, position, length) has exactly the same effect
* as the loop
*
*
* for (int i = 0; i < length; i++)
* dst.put(src.get(i + position));
*
* except that it first checks that there is sufficient space in this
* buffer and it is potentially much more efficient.
*
* @param src
* The source buffer from which bytes are to be read;
* must not be this buffer
*
* @param position starting position in the source buffer
*
* @param length number of bytes to be copied
*
* @return This buffer
*
* @throws BufferOverflowException
* If there is insufficient space in this buffer
* for the remaining bytes in the source buffer
*
* @throws IllegalArgumentException
* If the source buffer is this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer put(ByteBuffer src, int position, int length);
/**
* Relative bulk put method (optional operation).
*
* This method transfers the entire content of the given source
* byte array into this buffer. An invocation of this method of the
* form dst.put(a) behaves in exactly the same way as the
* invocation
*
*
* dst.put(a, 0, a.length)
*
* @return This buffer
*
* @throws BufferOverflowException
* If there is insufficient space in this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer put(byte[] src);
/**
* Relative bulk put method (optional operation).
*
* This method transfers bytes into this buffer from the given
* source array. If there are more bytes to be copied from the array
* than remain in this buffer, that is, if
* length > remaining(), then no
* bytes are transferred and a {@link BufferOverflowException} is
* thrown.
*
*
Otherwise, this method copies length bytes 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 length.
*
*
In other words, an invocation of this method of the form
* dst.put(src, off, len) has exactly the same effect as
* the loop
*
*
* for (int i = off; i < off + len; i++)
* dst.put(a[i]);
*
* except that it first checks that there is sufficient space in this
* buffer and it is potentially much more efficient.
*
* @param src
* The array from which bytes are to be read
*
* @param offset
* The offset within the array of the first byte to be read;
* must be non-negative and no larger than array.length
*
* @param length
* The number of bytes to be read from the given array;
* must be non-negative and no larger than
* array.length - offset
*
* @return This buffer
*
* @throws BufferOverflowException
* If there is insufficient space in this buffer
*
* @throws IndexOutOfBoundsException
* If the preconditions on the offset and length
* parameters do not hold
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer put(byte[] src, int offset, int length);
/**
* Relative bulk put method (optional operation).
*
* This method transfers bytes into this buffer from the given
* 8-bit source {@link String}. If the source {@link String#length()} is
* bigger than this buffer's remaining, that is, if
* length() > remaining(), then no
* bytes are transferred and a {@link BufferOverflowException} is
* thrown.
*
*
Otherwise, this method copies length bytes from the
* given {@link String} into this buffer.
*
*
In other words, an invocation of this method of the form
* dst.put8BitString(src) has exactly the same effect as
* the loop
*
*
* for (int i = 0; i < src.length(); i++)
* dst.put((byte) src.charAt(i));
*
* except that it first checks that there is sufficient space in this
* buffer and it is potentially much more efficient.
*
* @param s
* The {@link String} from which bytes are to be read
*
* @return This buffer
*
* @throws BufferOverflowException
* If there is insufficient space in this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
@SuppressWarnings("UnusedDeclaration")
Buffer put8BitString(String s);
/**
* Compacts this buffer (optional operation).
*
* The bytes between the buffer's current position and its limit,
* if any, are copied to the beginning of the buffer. That is, the
* byte at index p = position() is copied
* to index zero, the byte at index p + 1 is copied
* to index one, and so forth until the byte at index
* limit() - 1 is copied to index
* n = limit() - 1 - p.
* The buffer's position is then set to n+1 and its limit is set to
* its capacity. The mark, if defined, is discarded.
*
*
The buffer's position is set to the number of bytes copied,
* rather than to zero, so that an invocation of this method can be
* followed immediately by an invocation of another relative put
* method.
*
*
* Invoke this method after writing data from a buffer in case the
* write was incomplete. The following loop, for example, copies bytes
* from one channel to another via the buffer buf:
*
*
* buf.clear(); // Prepare buffer for use
* for (;;) {
* if (in.read(buf) < 0 && !buf.hasRemaining())
* break; // No more bytes to transfer
* buf.flip();
* out.write(buf);
* buf.compact(); // In case of partial write
* }
*
*
* @return This buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer compact();
/**
* Retrieves this buffer's byte order.
*
* The byte order is used when reading or writing multibyte values, and
* when creating buffers that are views of this Buffer. The order of
* a newly-created Buffer is always {@link ByteOrder#BIG_ENDIAN
* BIG_ENDIAN}.
*
* @return This buffer's byte order
*/
ByteOrder order();
/**
* Modifies this buffer's byte order.
*
* @param bo
* The new byte order,
* either {@link ByteOrder#BIG_ENDIAN BIG_ENDIAN}
* or {@link ByteOrder#LITTLE_ENDIAN LITTLE_ENDIAN}
*
* @return This buffer
*/
Buffer order(ByteOrder bo);
/**
* Relative get method for reading a char value.
*
* Reads the next two bytes at this buffer's current position,
* composing them into a char value according to the current byte order,
* and then increments the position by two.
*
* @return The char value at the buffer's current position
*
* @throws BufferUnderflowException
* If there are fewer than two bytes
* remaining in this buffer
*/
char getChar();
/**
* Relative put method for writing a char
* value (optional operation).
*
* Writes two bytes containing the given char value, in the
* current byte order, into this buffer at the current position, and then
* increments the position by two.
*
* @param value
* The char value to be written
*
* @return This buffer
*
* @throws BufferOverflowException
* If there are fewer than two bytes
* remaining in this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putChar(char value);
/**
* Absolute get method for reading a char value.
*
* Reads two bytes at the given index, composing them into a
* char value according to the current byte order.
*
* @param index
* The index from which the bytes will be read
*
* @return The char value at the given index
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus one
*/
char getChar(int index);
/**
* Absolute put method for writing a char
* value (optional operation).
*
* Writes two bytes containing the given char value, in the
* current byte order, into this buffer at the given index.
*
* @param index
* The index at which the bytes will be written
*
* @param value
* The char value to be written
*
* @return This buffer
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus one
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putChar(int index, char value);
/**
* Relative get method for reading a short value.
*
* Reads the next two bytes at this buffer's current position,
* composing them into a short value according to the current byte order,
* and then increments the position by two.
*
* @return The short value at the buffer's current position
*
* @throws BufferUnderflowException
* If there are fewer than two bytes
* remaining in this buffer
*/
short getShort();
/**
* Relative put method for writing a short
* value (optional operation).
*
* Writes two bytes containing the given short value, in the
* current byte order, into this buffer at the current position, and then
* increments the position by two.
*
* @param value
* The short value to be written
*
* @return This buffer
*
* @throws BufferOverflowException
* If there are fewer than two bytes
* remaining in this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putShort(short value);
/**
* Absolute get method for reading a short value.
*
* Reads two bytes at the given index, composing them into a
* short value according to the current byte order.
*
* @param index
* The index from which the bytes will be read
*
* @return The short value at the given index
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus one
*/
short getShort(int index);
/**
* Absolute put method for writing a short
* value (optional operation).
*
* Writes two bytes containing the given short value, in the
* current byte order, into this buffer at the given index.
*
* @param index
* The index at which the bytes will be written
*
* @param value
* The short value to be written
*
* @return This buffer
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus one
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putShort(int index, short value);
/**
* Relative get method for reading an int value.
*
* Reads the next four bytes at this buffer's current position,
* composing them into an int value according to the current byte order,
* and then increments the position by four.
*
* @return The int value at the buffer's current position
*
* @throws BufferUnderflowException
* If there are fewer than four bytes
* remaining in this buffer
*/
int getInt();
/**
* Relative put method for writing an int
* value (optional operation).
*
* Writes four bytes containing the given int value, in the
* current byte order, into this buffer at the current position, and then
* increments the position by four.
*
* @param value
* The int value to be written
*
* @return This buffer
*
* @throws BufferOverflowException
* If there are fewer than four bytes
* remaining in this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putInt(int value);
/**
* Absolute get method for reading an int value.
*
* Reads four bytes at the given index, composing them into a
* int value according to the current byte order.
*
* @param index
* The index from which the bytes will be read
*
* @return The int value at the given index
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus three
*/
int getInt(int index);
/**
* Absolute put method for writing an int
* value (optional operation).
*
* Writes four bytes containing the given int value, in the
* current byte order, into this buffer at the given index.
*
* @param index
* The index at which the bytes will be written
*
* @param value
* The int value to be written
*
* @return This buffer
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus three
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putInt(int index, int value);
/**
* Relative get method for reading a long value.
*
* Reads the next eight bytes at this buffer's current position,
* composing them into a long value according to the current byte order,
* and then increments the position by eight.
*
* @return The long value at the buffer's current position
*
* @throws BufferUnderflowException
* If there are fewer than eight bytes
* remaining in this buffer
*/
long getLong();
/**
* Relative put method for writing a long
* value (optional operation).
*
* Writes eight bytes containing the given long value, in the
* current byte order, into this buffer at the current position, and then
* increments the position by eight.
*
* @param value
* The long value to be written
*
* @return This buffer
*
* @throws BufferOverflowException
* If there are fewer than eight bytes
* remaining in this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putLong(long value);
/**
* Absolute get method for reading a long value.
*
* Reads eight bytes at the given index, composing them into a
* long value according to the current byte order.
*
* @param index
* The index from which the bytes will be read
*
* @return The long value at the given index
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus seven
*/
long getLong(int index);
/**
* Absolute put method for writing a long
* value (optional operation).
*
* Writes eight bytes containing the given long value, in the
* current byte order, into this buffer at the given index.
*
* @param index
* The index at which the bytes will be written
*
* @param value
* The long value to be written
*
* @return This buffer
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus seven
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putLong(int index, long value);
/**
* Relative get method for reading a float value.
*
* Reads the next four bytes at this buffer's current position,
* composing them into a float value according to the current byte order,
* and then increments the position by four.
*
* @return The float value at the buffer's current position
*
* @throws BufferUnderflowException
* If there are fewer than four bytes
* remaining in this buffer
*/
float getFloat();
/**
* Relative put method for writing a float
* value (optional operation).
*
* Writes four bytes containing the given float value, in the
* current byte order, into this buffer at the current position, and then
* increments the position by four.
*
* @param value
* The float value to be written
*
* @return This buffer
*
* @throws BufferOverflowException
* If there are fewer than four bytes
* remaining in this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putFloat(float value);
/**
* Absolute get method for reading a float value.
*
* Reads four bytes at the given index, composing them into a
* float value according to the current byte order.
*
* @param index
* The index from which the bytes will be read
*
* @return The float value at the given index
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus three
*/
float getFloat(int index);
/**
* Absolute put method for writing a float
* value (optional operation).
*
* Writes four bytes containing the given float value, in the
* current byte order, into this buffer at the given index.
*
* @param index
* The index at which the bytes will be written
*
* @param value
* The float value to be written
*
* @return This buffer
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus three
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putFloat(int index, float value);
/**
* Relative get method for reading a double value.
*
* Reads the next eight bytes at this buffer's current position,
* composing them into a double value according to the current byte order,
* and then increments the position by eight.
*
* @return The double value at the buffer's current position
*
* @throws BufferUnderflowException
* If there are fewer than eight bytes
* remaining in this buffer
*/
double getDouble();
/**
* Relative put method for writing a double
* value (optional operation).
*
* Writes eight bytes containing the given double value, in the
* current byte order, into this buffer at the current position, and then
* increments the position by eight.
*
* @param value
* The double value to be written
*
* @return This buffer
*
* @throws BufferOverflowException
* If there are fewer than eight bytes
* remaining in this buffer
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putDouble(double value);
/**
* Absolute get method for reading a double value.
*
* Reads eight bytes at the given index, composing them into a
* double value according to the current byte order.
*
* @param index
* The index from which the bytes will be read
*
* @return The double value at the given index
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus seven
*/
double getDouble(int index);
/**
* Absolute put method for writing a double
* value (optional operation).
*
* Writes eight bytes containing the given double value, in the
* current byte order, into this buffer at the given index.
*
* @param index
* The index at which the bytes will be written
*
* @param value
* The double value to be written
*
* @return This buffer
*
* @throws IndexOutOfBoundsException
* If index is negative
* or not smaller than the buffer's limit,
* minus seven
*
* @throws ReadOnlyBufferException
* If this buffer is read-only
*/
Buffer putDouble(int index, double value);
/**
* Returns {@link Buffer} content as {@link String}, using default {@link Charset}
*
* @return {@link String} representation of this {@link Buffer} content.
*/
String toStringContent();
/**
* Returns {@link Buffer} content as {@link String}
* @param charset the {@link Charset}, which will be use
* for byte[] -> {@link String} transformation.
*
* @return {@link String} representation of this {@link Buffer} content.
*/
String toStringContent(Charset charset);
/**
* Returns {@link Buffer}'s chunk content as {@link String}
* @param charset the {@link Charset}, which will be use
* for byte[] -> {@link String} transformation.
* @param position the first byte offset in the Buffer (inclusive)
* @param limit the last byte offset in the Buffer (exclusive)
*
* @return {@link String} representation of part of this {@link Buffer}.
*/
String toStringContent(Charset charset, int position, int limit);
/**
* Generate a hex dump of this {@link Buffer}'s content.
*
* @param appendable the {@link Appendable} to dump this {@link Buffer}'s
* content to.
* @since 2.3.23
*/
@SuppressWarnings("unused")
void dumpHex(final java.lang.Appendable appendable);
/**
*
* Converts this Buffer to a {@link ByteBuffer}.
* If this Buffer is not composite - then returned
* {@link ByteBuffer}'s content is a shared subsequence of this buffer's
* content, with {@link CompositeBuffer} this is not guaranteed.
* The position of the returned {@link ByteBuffer} is not guaranteed to be 0,
* the capacity of the returned {@link ByteBuffer} is not guaranteed to be
* equal to the capacity of this Buffer.
* It is guaranteed that the result of the returned ByteBuffer's
* {@link ByteBuffer#remaining()} call will be equal to this Buffer's
* {@link #remaining()} call.
* The Buffer's and ByteBuffer's position, limit, and mark values are not
* guaranteed to be independent, so it's recommended to save and restore
* position, limit values if it is planned to change them or
* {@link ByteBuffer#slice()} the returned {@link ByteBuffer}.
*
*
* @return this Buffer as a {@link ByteBuffer}.
*/
ByteBuffer toByteBuffer();
/**
*
* Converts this Buffer to a {@link ByteBuffer}.
* If this Buffer is not composite - then returned
* {@link ByteBuffer}'s content is a shared subsequence of this buffer's
* content, with {@link CompositeBuffer} this is not guaranteed.
* The position of the returned {@link ByteBuffer} is not guaranteed to be 0,
* the capacity of the returned {@link ByteBuffer} is not guaranteed to be
* equal to the capacity of this Buffer.
* It is guaranteed that the result of the returned ByteBuffer's
* {@link ByteBuffer#remaining()} call will be equal (limit - position).
* The Buffer's and ByteBuffer's position, limit, and mark values are not
* guaranteed to be independent, so it's recommended to save and restore
* position, limit values if it is planned to change them or
* {@link ByteBuffer#slice()} the returned {@link ByteBuffer}.
*
*
* @param position the position for the starting subsequence for the
* returned {@link ByteBuffer}.
* @param limit the limit for the ending of the subsequence of the
* returned {@link ByteBuffer}.
*
* @return this Buffer as a {@link ByteBuffer}.
*/
ByteBuffer toByteBuffer(int position, int limit);
/**
*
* Converts this Buffer to a {@link ByteBuffer} per {@link #toByteBuffer()}
* and returns a {@link ByteBufferArray} containing the converted {@link ByteBuffer}.
* It is guaranteed that returned array's ByteBuffer elements' content is
* a shared subsequence of this buffer's content no matter if it's a
* {@link CompositeBuffer} or not.
*
*
* @return Converts this Buffer to a {@link ByteBuffer} per {@link #toByteBuffer()}
* and returns a {@link ByteBufferArray} containing the converted {@link ByteBuffer}.
*
* @see #toByteBuffer()
*/
@SuppressWarnings("UnusedDeclaration")
ByteBufferArray toByteBufferArray();
/**
*
* Converts this Buffer to a {@link ByteBuffer} per {@link #toByteBuffer()}
* and adds the result to the provided {@link ByteBufferArray}.
* It is guaranteed that returned array's ByteBuffer elements' content is
* a shared subsequence of this buffer's content no matter if it's a
* {@link CompositeBuffer} or not.
*
*
* @return returns the provided {@link ByteBufferArray} with the converted
* {@link ByteBuffer} added to provided array.
*
* @see #toByteBuffer()
*/
ByteBufferArray toByteBufferArray(ByteBufferArray array);
/**
*
* Converts this Buffer to a {@link ByteBuffer} per {@link #toByteBuffer(int, int)}
* and returns a {@link ByteBufferArray} containing the converted {@link ByteBuffer}.
* It is guaranteed that returned array's ByteBuffer elements' content is
* a shared subsequence of this buffer's content no matter if it's a
* {@link CompositeBuffer} or not.
*
*
* @param position the start position within the source buffer
* @param limit the limit, or number, of bytes to include in the resulting
* {@link ByteBuffer}
*
* @return Converts this Buffer to a {@link ByteBuffer} per {@link #toByteBuffer(int, int)}
* and returns a {@link ByteBufferArray} containing the converted {@link ByteBuffer}.
*
* @see #toByteBuffer(int, int)
*/
ByteBufferArray toByteBufferArray(int position, int limit);
/**
*
* Converts this Buffer to a {@link ByteBuffer} per {@link #toByteBuffer(int, int)}
* and adds the result to the provided {@link ByteBufferArray}.
* It is guaranteed that returned array's ByteBuffer elements' content is
* a shared subsequence of this buffer's content no matter if it's a
* {@link CompositeBuffer} or not.
*
*
* @return returns the provided {@link ByteBufferArray} with the converted
* {@link ByteBuffer} added to provided array.
*
* @see #toByteBuffer(int, int)
*/
ByteBufferArray toByteBufferArray(ByteBufferArray array, int position, int limit);
/**
*
* Returns a new {@link BufferArray} instance with this Buffer
* added as an element to the {@link BufferArray}.
* It is guaranteed that returned array's Buffer elements' content is
* a shared subsequence of this buffer's content no matter if it's a
* {@link CompositeBuffer} or not.
*
*
* @return Returns a new {@link BufferArray} instance with this Buffer
* added as an element to the {@link BufferArray}.
*/
BufferArray toBufferArray();
/**
*
* Returns the specified {@link BufferArray} after adding this Buffer.
* It is guaranteed that returned array's Buffer elements' content is
* a shared subsequence of this buffer's content no matter if it's a
* {@link CompositeBuffer} or not.
*
*
* @return Returns the specified {@link BufferArray} after adding this Buffer.
*/
BufferArray toBufferArray(BufferArray array);
/**
*
* Updates this Buffer's position and limit
* and adds it to a new {@link BufferArray} instance.
* It is guaranteed that returned array's Buffer elements' content is
* a shared subsequence of this buffer's content no matter if it's a
* {@link CompositeBuffer} or not.
*
*
* @param position the new position for this Buffer
* @param limit the new limit for this Buffer
*
* @return adds this Buffer and returns the specified
* {@link BufferArray}.
*/
BufferArray toBufferArray(int position, int limit);
/**
*
* Updates this Buffer's position and limit
* and adds it to the specified {@link BufferArray}.
* It is guaranteed that returned array's Buffer elements' content is
* a shared subsequence of this buffer's content no matter if it's a
* {@link CompositeBuffer} or not.
*
*
* @param position the new position for this Buffer
* @param limit the new limit for this Buffer
*
* @return adds this Buffer and returns the specified
* {@link BufferArray}.
*/
BufferArray toBufferArray(BufferArray array, int position, int limit);
/**
* Tells whether or not this buffer is backed by an accessible byte array.
*
* If this method returns true then the array and arrayOffset methods may
* safely be invoked.
*
* @return true if, and only if, this buffer is backed by an array
* and is not read-only
*
* @since 2.1.12
*/
boolean hasArray();
/**
* Returns the byte array that backs this buffer (optional operation).
*
* Modifications to this buffer's content will cause the returned array's
* content to be modified, and vice versa.
*
* Invoke the hasArray method before invoking this method in order to ensure
* that this buffer has an accessible backing array.
*
* @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
*
* @since 2.1.12
*/
byte[] array();
/**
* Returns the offset within this buffer's backing array of the first
* element of the buffer (optional operation).
*
* If this buffer is backed by an array then buffer position p corresponds
* to array index p + arrayOffset().
*
* Invoke the hasArray method before invoking this method in order to ensure
* that this buffer has an accessible backing array.
*
* @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
*
* @since 2.1.12
*/
int arrayOffset();
}