Module org.snmp4j

Class BEROutputStream

  • All Implemented Interfaces:
    Closeable, Flushable, AutoCloseable

    public class BEROutputStream
    extends OutputStream
    The BEROutputStream class wraps a ByteBuffer to support BER encoding. The backing buffer can be accessed directly to optimize performance and memory usage.
    Version:
    1.0
    Author:
    Frank Fock
    • Constructor Detail

      • BEROutputStream

        public BEROutputStream()
        Creates a BER output stream without a backing buffer set. In order to be able to write anything to the stream, setBuffer(ByteBuffer buffer) has to be called before. Otherwise a NullPointerException will be thrown when calling one of the write operations.
      • BEROutputStream

        public BEROutputStream​(ByteBuffer buffer)
        Create a BEROutputStream that uses the supplied buffer as backing buffer.
        Parameters:
        buffer - a ByteBuffer whose limit and capacity must be greater or equal that the length of the encoded BER stream.
    • Method Detail

      • rewind

        public ByteBuffer rewind()
        Rewinds backing buffer and returns it. In contrast to the backing buffer's rewind method, this method sets the position of the buffer to the first byte of this output stream rather than to the first byte of the underlying byte array!
        Returns:
        the ByteBuffer backing this output stream with its current position set to the begin of the output stream.
      • getBuffer

        public ByteBuffer getBuffer()
        Gets the backing buffer.
        Returns:
        the ByteBuffer backing this output stream.
      • setBuffer

        public void setBuffer​(ByteBuffer buffer)
        Sets the backing buffer to the supplied one and sets the offset used by rewind() to the buffers current position.
        Parameters:
        buffer - a ByteBuffer whose limit and capacity must be greater or equal that the length of the encoded BER stream.
      • setFilledBuffer

        public void setFilledBuffer​(ByteBuffer buffer)
        Sets the backing buffer and sets the current position of the stream to the buffers limit (end).
        Parameters:
        buffer - a ByteBuffer whose limit and capacity must be greater or equal that the length of the encoded BER stream.