Package io.grpc.internal

Class ForwardingReadableBuffer

java.lang.Object
io.grpc.internal.ForwardingReadableBuffer
All Implemented Interfaces:
ReadableBuffer, Closeable, AutoCloseable
public abstract class ForwardingReadableBuffer extends Object implements ReadableBuffer
Base class for a wrapper around another ReadableBuffer.

This class just passes every operation through to the underlying buffer. Subclasses may override methods to intercept certain operations.

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    protected
    ForwardingReadableBuffer(ReadableBuffer buf)
    Constructor.

  • Method Summary

    Modifier and Type
    Method
    Description
    byte[]
    array()
    Gets the backing array for this buffer.
    int
    arrayOffset()
    Gets the offset in the backing array of the current read position.
    boolean
    byteBufferSupported()
    Indicates whether or not ReadableBuffer.getByteBuffer() operation is supported for this buffer.
    void
    close()
    Closes this buffer and releases any resources.
    ByteBuffer
    getByteBuffer()
    Gets a ByteBuffer that contains some bytes of the content next to be read, or null if this buffer has been exhausted.
    boolean
    hasArray()
    Indicates whether or not this buffer exposes a backing array.
    void
    mark()
    Marks the current position in this buffer.
    boolean
    markSupported()
    Indicates whether or not ReadableBuffer.mark() operation is supported for this buffer.
    int
    readableBytes()
    Gets the current number of readable bytes remaining in this buffer.
    void
    readBytes(byte[] dest, int destOffset, int length)
    Reads length bytes from this buffer and writes them to the destination array.
    ReadableBuffer
    readBytes(int length)
    Reads length bytes from this buffer and returns a new Buffer containing them.
    void
    readBytes(OutputStream dest, int length)
    Reads length bytes from this buffer and writes them to the destination stream.
    void
    readBytes(ByteBuffer dest)
    Reads from this buffer until the destination's position reaches its limit, and increases the read position by the number of the transferred bytes.
    int
    readInt()
    Reads a 4-byte signed integer from this buffer using big-endian byte ordering.
    int
    readUnsignedByte()
    Reads the next unsigned byte from this buffer and increments the read position by 1.
    void
    reset()
    Repositions this buffer to the position at the time ReadableBuffer.mark() was last called on this buffer.
    void
    skipBytes(int length)
    Increments the read position by the given length.
    String
    toString()
     
    void
    touch()
    Note that the current callsite has access to this buffer, or do nothing.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

  • Constructor Details

    • ForwardingReadableBuffer

      protected ForwardingReadableBuffer(ReadableBuffer buf)
      Constructor.
      Parameters:
      buf - the underlying buffer

  • Method Details

    • readableBytes

      public int readableBytes()
      Description copied from interface: ReadableBuffer
      Gets the current number of readable bytes remaining in this buffer.
      Specified by:
      readableBytes in interface ReadableBuffer

    • readUnsignedByte

      public int readUnsignedByte()
      Description copied from interface: ReadableBuffer
      Reads the next unsigned byte from this buffer and increments the read position by 1.
      Specified by:
      readUnsignedByte in interface ReadableBuffer

    • readInt

      public int readInt()
      Description copied from interface: ReadableBuffer
      Reads a 4-byte signed integer from this buffer using big-endian byte ordering. Increments the read position by 4.
      Specified by:
      readInt in interface ReadableBuffer

    • skipBytes

      public void skipBytes(int length)
      Description copied from interface: ReadableBuffer
      Increments the read position by the given length.
      Specified by:
      skipBytes in interface ReadableBuffer

    • readBytes

      public void readBytes(byte[] dest, int destOffset, int length)
      Description copied from interface: ReadableBuffer
      Reads length bytes from this buffer and writes them to the destination array. Increments the read position by length.
      Specified by:
      readBytes in interface ReadableBuffer
      Parameters:
      dest - the destination array to receive the bytes.
      destOffset - the starting offset in the destination array.
      length - the number of bytes to be copied.

    • readBytes

      public void readBytes(ByteBuffer dest)
      Description copied from interface: ReadableBuffer
      Reads from this buffer until the destination's position reaches its limit, and increases the read position by the number of the transferred bytes.
      Specified by:
      readBytes in interface ReadableBuffer
      Parameters:
      dest - the destination buffer to receive the bytes.

    • readBytes

      public void readBytes(OutputStream dest, int length) throws IOException
      Description copied from interface: ReadableBuffer
      Reads length bytes from this buffer and writes them to the destination stream. Increments the read position by length. If the required bytes are not readable, throws IndexOutOfBoundsException.
      Specified by:
      readBytes in interface ReadableBuffer
      Parameters:
      dest - the destination stream to receive the bytes.
      length - the number of bytes to be copied.
      Throws:
      IOException - thrown if any error was encountered while writing to the stream.

    • readBytes

      public ReadableBuffer readBytes(int length)
      Description copied from interface: ReadableBuffer
      Reads length bytes from this buffer and returns a new Buffer containing them. Some implementations may return a Buffer sharing the backing memory with this buffer to prevent copying. However, that means that the returned buffer may keep the (possibly much larger) backing memory in use even after this buffer is closed.
      Specified by:
      readBytes in interface ReadableBuffer
      Parameters:
      length - the number of bytes to contain in returned Buffer.

    • hasArray

      public boolean hasArray()
      Description copied from interface: ReadableBuffer
      Indicates whether or not this buffer exposes a backing array.
      Specified by:
      hasArray in interface ReadableBuffer

    • array

      public byte[] array()
      Description copied from interface: ReadableBuffer
      Gets the backing array for this buffer. This is an optional method, so callers should first check ReadableBuffer.hasArray().
      Specified by:
      array in interface ReadableBuffer

    • arrayOffset

      public int arrayOffset()
      Description copied from interface: ReadableBuffer
      Gets the offset in the backing array of the current read position. This is an optional method, so callers should first check ReadableBuffer.hasArray()
      Specified by:
      arrayOffset in interface ReadableBuffer

    • touch

      public void touch()
      Description copied from interface: ReadableBuffer
      Note that the current callsite has access to this buffer, or do nothing. This is only useful when the buffer has leak detection and intrumentation to record usages before the buffer was leaked. That can make it much easier to track down where the buffer was leaked. If this isn't such a buffer, the method does nothing.
      Specified by:
      touch in interface ReadableBuffer

    • markSupported

      public boolean markSupported()
      Description copied from interface: ReadableBuffer
      Indicates whether or not ReadableBuffer.mark() operation is supported for this buffer.
      Specified by:
      markSupported in interface ReadableBuffer

    • mark

      public void mark()
      Description copied from interface: ReadableBuffer
      Marks the current position in this buffer. A subsequent call to the ReadableBuffer.reset() method repositions this stream at the last marked position so that subsequent reads re-read the same bytes.
      Specified by:
      mark in interface ReadableBuffer

    • reset

      public void reset()
      Description copied from interface: ReadableBuffer
      Repositions this buffer to the position at the time ReadableBuffer.mark() was last called on this buffer.
      Specified by:
      reset in interface ReadableBuffer

    • byteBufferSupported

      public boolean byteBufferSupported()
      Description copied from interface: ReadableBuffer
      Indicates whether or not ReadableBuffer.getByteBuffer() operation is supported for this buffer.
      Specified by:
      byteBufferSupported in interface ReadableBuffer

    • getByteBuffer

      @Nullable public ByteBuffer getByteBuffer()
      Description copied from interface: ReadableBuffer
      Gets a ByteBuffer that contains some bytes of the content next to be read, or null if this buffer has been exhausted. The number of bytes contained in the returned buffer is implementation specific. The position of this buffer is unchanged after calling this method. The returned buffer's content should not be modified, but the position, limit, and mark may be changed. Operations for changing the position, limit, and mark of the returned buffer does not affect the position, limit, and mark of this buffer. Buffers returned by this method have independent position, limit and mark. This is an optional method, so callers should first check ReadableBuffer.byteBufferSupported().
      Specified by:
      getByteBuffer in interface ReadableBuffer

    • close

      public void close()
      Description copied from interface: ReadableBuffer
      Closes this buffer and releases any resources.
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable
      Specified by:
      close in interface ReadableBuffer

    • toString

      public String toString()
      Overrides:
      toString in class Object