Package com.pixelmed.network

Class AssociationOutputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable
    public class AssociationOutputStream
extends java.io.OutputStream

    A specialized java.io.OutputStream which buffers and fragments data which is written to it into PDUs and sends them over the supplied OutputStream which is (presumably) that of the java.net.Socket of an established Association.

    This stream buffers data that is written to it and when it is either flushed or closed or reaches the specified maximum PDU size, writes data (not command) PDU's to the supplied output stream.

    Need to take care with "last fragment" flag ... that cannot be set until close() is called, and if the buffer is empty at that time, a zero length PDU will be sent.

    • Constructor Summary

      Constructors 
      Constructor Description
      AssociationOutputStream​(java.io.OutputStream out, int maxPDUSize, int presentationContextID, int debugLevel)
      Construct a PDU buffering OutputStream on top of another OutputStream

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()
      Sets the last fragment flag and flushes (which sends a zero length PDU if necessary, and pads to an even length, if necessary).
      void flush()
      Do nothing.
      void write​(byte[] b)
      Buffer the supplied data, flushing (actually sending) PDUs when the buffer is filled.
      void write​(byte[] b, int off, int len)
      Buffer the supplied data, flushing (actually sending) PDUs when the buffer is filled.
      void write​(int i)
      Buffer the supplied data, flushing (actually sending) PDUs when the buffer is filled.

      • Methods inherited from class java.io.OutputStream

        nullOutputStream

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • AssociationOutputStream

        public AssociationOutputStream​(java.io.OutputStream out,
                               int maxPDUSize,
                               int presentationContextID,
                               int debugLevel)
                        throws DicomNetworkException
        Construct a PDU buffering OutputStream on top of another OutputStream
        Parameters:
        out - where to send the buffered output
        maxPDUSize - how large to make the buffer (i.e. the PDU) size
        presentationContextID - included in the header of each PDU
        debugLevel - 0 for no debugging, > 0 for increasingly verbose debugging
        Throws:
        DicomNetworkException

    • Method Detail

      • write

        public void write​(int i)
           throws java.io.IOException
        Buffer the supplied data, flushing (actually sending) PDUs when the buffer is filled.
        Specified by:
        write in class java.io.OutputStream
        Parameters:
        i -
        Throws:
        java.io.IOException

      • write

        public void write​(byte[] b)
           throws java.io.IOException
        Buffer the supplied data, flushing (actually sending) PDUs when the buffer is filled.
        Overrides:
        write in class java.io.OutputStream
        Parameters:
        b -
        Throws:
        java.io.IOException

      • write

        public void write​(byte[] b,
                  int off,
                  int len)
           throws java.io.IOException
        Buffer the supplied data, flushing (actually sending) PDUs when the buffer is filled.
        Overrides:
        write in class java.io.OutputStream
        Parameters:
        b -
        off -
        len -
        Throws:
        java.io.IOException

      • close

        public void close()
           throws java.io.IOException
        Sets the last fragment flag and flushes (which sends a zero length PDU if necessary, and pads to an even length, if necessary). Does NOT actually close the underlying stream, since that may well be used for other operations later.
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Overrides:
        close in class java.io.OutputStream
        Throws:
        java.io.IOException

      • flush

        public void flush()
           throws java.io.IOException
        Do nothing.
        Specified by:
        flush in interface java.io.Flushable
        Overrides:
        flush in class java.io.OutputStream
        Throws:
        java.io.IOException