Package org.monte.media.io

Class ByteArrayImageInputStream

  • All Implemented Interfaces:
    Closeable, DataInput, AutoCloseable, ImageInputStream
    public class ByteArrayImageInputStream
extends ImageInputStreamImpl2
    A ByteArrayImageInputStream contains an internal buffer that contains bytes that may be read from the stream. An internal counter keeps track of the next byte to be supplied by the read method.

    Closing a ByteArrayImageInputStream has no effect. The methods in this class can be called after the stream has been closed without generating an IOException.

    Version:
    $Id: ByteArrayImageInputStream.java 348 2015-09-23 17:46:43Z werner $
    Author:
    Werner Randelshofer, Hausmatt 10, CH-6405 Goldau

    • Field Detail

      • buf

        protected byte[] buf
        An array of bytes that was provided by the creator of the stream. Elements buf[0] through buf[count-1] are the only bytes that can ever be read from the stream; element buf[streamPos] is the next byte to be read.

      • count

        protected int count
        The index one greater than the last valid character in the input stream buffer. This value should always be nonnegative and not larger than the length of buf. It is one greater than the position of the last byte within buf that can ever be read from the input stream buffer.

    • Constructor Detail

      • ByteArrayImageInputStream

        public ByteArrayImageInputStream​(byte[] buf)

      • ByteArrayImageInputStream

        public ByteArrayImageInputStream​(byte[] buf,
                                 ByteOrder byteOrder)

      • ByteArrayImageInputStream

        public ByteArrayImageInputStream​(byte[] buf,
                                 int offset,
                                 int length,
                                 ByteOrder byteOrder)

    • Method Detail

      • read

        public int read()
        Reads the next byte of data from this input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned.

        This read method cannot block.

        Specified by:
        read in interface ImageInputStream
        Specified by:
        read in class ImageInputStreamImpl
        Returns:
        the next byte of data, or -1 if the end of the stream has been reached.

      • read

        public int read​(byte[] b,
                int off,
                int len)
        Reads up to len bytes of data into an array of bytes from this input stream. If streamPos equals count, then -1 is returned to indicate end of file. Otherwise, the number k of bytes read is equal to the smaller of len and count-streamPos. If k is positive, then bytes buf[streamPos] through buf[streamPos+k-1] are copied into b[off] through b[off+k-1] in the manner performed by System.arraycopy. The value k is added into streamPos and k is returned.

        This read method cannot block.

        Specified by:
        read in interface ImageInputStream
        Specified by:
        read in class ImageInputStreamImpl
        Parameters:
        b - the buffer into which the data is read.
        off - the start offset in the destination array b
        len - the maximum number of bytes read.
        Returns:
        the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.
        Throws:
        NullPointerException - If b is null.
        IndexOutOfBoundsException - If off is negative, len is negative, or len is greater than b.length - off

      • skip

        public long skip​(long n)
        Skips n bytes of input from this input stream. Fewer bytes might be skipped if the end of the input stream is reached. The actual number k of bytes to be skipped is equal to the smaller of n and count-streamPos. The value k is added into streamPos and k is returned.
        Parameters:
        n - the number of bytes to be skipped.
        Returns:
        the actual number of bytes skipped.

      • available

        public int available()
        Returns the number of remaining bytes that can be read (or skipped over) from this input stream.

        The value returned is count - streamPos, which is the number of bytes remaining to be read from the input buffer.

        Returns:
        the number of remaining bytes that can be read (or skipped over) from this input stream without blocking.