Package org.jboss.marshalling

Class SimpleDataInput

  • All Implemented Interfaces:
    java.io.Closeable, java.io.DataInput, java.lang.AutoCloseable, ByteInput
    Direct Known Subclasses:
    AbstractObjectInput
    public class SimpleDataInput
extends ByteInputStream
implements java.io.DataInput
    A simple base implementation of DataInput which wraps a ByteInput. This implementation maintains an internal buffer.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected byte[] buffer
      The internal buffer.
      protected int limit
      The buffer limit.
      protected int position
      The buffer position.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int available()
      Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream.
      void close()
      private static java.io.EOFException eofOnRead()  
      protected void finish()
      Finish reading from the current input.
      int read()
      Reads the next byte of data from the input stream.
      int read​(byte[] b)
      Read some bytes from the input stream into the given array.
      int read​(byte[] b, int off, int len)
      Read some bytes from the input stream into the given array.
      boolean readBoolean()
      byte readByte()
      char readChar()
      double readDouble()
      float readFloat()
      void readFully​(byte[] b)
      void readFully​(byte[] b, int off, int len)
      int readInt()
      protected int readIntDirect()
      Read an int value.
      java.lang.String readLine()
      long readLong()  
      protected long readLongDirect()
      short readShort()
      int readUnsignedByte()
      protected int readUnsignedByteDirect()
      Read an unsigned byte directly.
      int readUnsignedShort()
      java.lang.String readUTF()
      long skip​(long n)
      Skips over and discards up to n bytes of data from this input stream.
      int skipBytes​(int n)
      protected void start​(ByteInput byteInput)
      Start reading from the given input.

      • Methods inherited from class java.io.InputStream

        mark, markSupported, nullInputStream, readAllBytes, readNBytes, readNBytes, reset, transferTo

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • buffer

        protected final byte[] buffer
        The internal buffer.

      • position

        protected int position
        The buffer position.

      • limit

        protected int limit
        The buffer limit.

    • Constructor Detail

      • SimpleDataInput

        public SimpleDataInput​(int bufferSize)
        Construct a new instance which wraps nothing.
        Parameters:
        bufferSize - the internal buffer size to use

      • SimpleDataInput

        public SimpleDataInput​(int bufferSize,
                       ByteInput byteInput)
        Construct a new instance.
        Parameters:
        bufferSize - the internal buffer size to use
        byteInput - the byte input to initially wrap

      • SimpleDataInput

        public SimpleDataInput​(ByteInput byteInput)
        Construct a new instance. A default buffer size is used.
        Parameters:
        byteInput - the byte input to initially wrap

    • Method Detail

      • read

        public int read()
         throws java.io.IOException
        Reads the next byte of data from the input stream. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.
        Specified by:
        read in interface ByteInput
        Overrides:
        read in class ByteInputStream
        Returns:
        the next byte, or -1 if the end of stream has been reached
        Throws:
        java.io.IOException - if an error occurs

      • read

        public int read​(byte[] b)
         throws java.io.IOException
        Read some bytes from the input stream into the given array. Returns the number of bytes actually read (possibly zero), or -1 if the end of stream has been reached.
        Specified by:
        read in interface ByteInput
        Overrides:
        read in class ByteInputStream
        Parameters:
        b - the destination array
        Returns:
        the number of bytes read (possibly zero), or -1 if the end of stream has been reached
        Throws:
        java.io.IOException - if an error occurs

      • read

        public int read​(byte[] b,
                int off,
                int len)
         throws java.io.IOException
        Read some bytes from the input stream into the given array. Returns the number of bytes actually read (possibly zero), or -1 if the end of stream has been reached.
        Specified by:
        read in interface ByteInput
        Overrides:
        read in class ByteInputStream
        Parameters:
        b - the destination array
        off - the offset into the array into which data should be read
        len - the number of bytes to attempt to fill in the destination array
        Returns:
        the number of bytes read (possibly zero), or -1 if the end of stream has been reached
        Throws:
        java.io.IOException - if an error occurs

      • skip

        public long skip​(long n)
          throws java.io.IOException
        Skips over and discards up to n bytes of data from this input stream. If the end of stream is reached, this method returns 0 in order to be consistent with InputStream.skip(long).
        Specified by:
        skip in interface ByteInput
        Overrides:
        skip in class ByteInputStream
        Parameters:
        n - the number of bytes to attempt to skip
        Returns:
        the number of bytes skipped
        Throws:
        java.io.IOException - if an error occurs

      • available

        public int available()
              throws java.io.IOException
        Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream.
        Specified by:
        available in interface ByteInput
        Overrides:
        available in class ByteInputStream
        Returns:
        the number of bytes
        Throws:
        java.io.IOException - if an error occurs

      • eofOnRead

        private static java.io.EOFException eofOnRead()

      • readFully

        public void readFully​(byte[] b)
               throws java.io.IOException
        Specified by:
        readFully in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readFully

        public void readFully​(byte[] b,
                      int off,
                      int len)
               throws java.io.IOException
        Specified by:
        readFully in interface java.io.DataInput
        Throws:
        java.io.IOException

      • skipBytes

        public int skipBytes​(int n)
              throws java.io.IOException
        Specified by:
        skipBytes in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readBoolean

        public boolean readBoolean()
                    throws java.io.IOException
        Specified by:
        readBoolean in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readByte

        public byte readByte()
              throws java.io.IOException
        Specified by:
        readByte in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readUnsignedByte

        public int readUnsignedByte()
                     throws java.io.IOException
        Specified by:
        readUnsignedByte in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readShort

        public short readShort()
                throws java.io.IOException
        Specified by:
        readShort in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readUnsignedShort

        public int readUnsignedShort()
                      throws java.io.IOException
        Specified by:
        readUnsignedShort in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readUnsignedByteDirect

        protected int readUnsignedByteDirect()
                              throws java.io.IOException
        Read an unsigned byte directly.
        Returns:
        the unsigned byte
        Throws:
        java.io.IOException - if an error occurs

      • readChar

        public char readChar()
              throws java.io.IOException
        Specified by:
        readChar in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readInt

        public int readInt()
            throws java.io.IOException
        Specified by:
        readInt in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readLong

        public long readLong()
              throws java.io.IOException
        Specified by:
        readLong in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readLongDirect

        protected long readLongDirect()
                       throws java.io.IOException
        Throws:
        java.io.IOException

      • readFloat

        public float readFloat()
                throws java.io.IOException
        Specified by:
        readFloat in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readIntDirect

        protected int readIntDirect()
                     throws java.io.IOException
        Read an int value.
        Returns:
        the value
        Throws:
        java.io.IOException - if an error occurs

      • readDouble

        public double readDouble()
                  throws java.io.IOException
        Specified by:
        readDouble in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readLine

        public java.lang.String readLine()
                          throws java.io.IOException
        Specified by:
        readLine in interface java.io.DataInput
        Throws:
        java.io.IOException

      • readUTF

        public java.lang.String readUTF()
                         throws java.io.IOException
        Specified by:
        readUTF in interface java.io.DataInput
        Throws:
        java.io.IOException

      • close

        public void close()
           throws java.io.IOException
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Overrides:
        close in class ByteInputStream
        Throws:
        java.io.IOException

      • start

        protected void start​(ByteInput byteInput)
              throws java.io.IOException
        Start reading from the given input. The internal buffer is discarded.
        Parameters:
        byteInput - the new input from which to read
        Throws:
        java.io.IOException - not thrown by this implementation, but may be overridden to be thrown if a problem occurs

      • finish

        protected void finish()
               throws java.io.IOException
        Finish reading from the current input. The internal buffer is discarded, not flushed.
        Throws:
        java.io.IOException - not thrown by this implementation, but may be overridden to be thrown if a problem occurs