Package jj2000.j2k.io

Class BEBufferedRandomAccessFile

    • Constructor Detail

      • BEBufferedRandomAccessFile

        public BEBufferedRandomAccessFile​(File file,
                                          String mode,
                                          int bufferSize)
                                   throws IOException
        Constructor. Always needs a size for the buffer.
        Parameters:
        file - The file associated with the buffer
        mode - "r" for read, "rw" or "rw+" for read and write mode ("rw+" opens the file for update whereas "rw" removes it before. So the 2 modes are different only if the file already exists).
        bufferSize - The number of bytes to buffer
        Throws:
        IOException - If an I/O error ocurred.
      • BEBufferedRandomAccessFile

        public BEBufferedRandomAccessFile​(File file,
                                          String mode)
                                   throws IOException
        Constructor. Uses the default value for the byte-buffer size (512 bytes).
        Parameters:
        file - The file associated with the buffer
        mode - "r" for read, "rw" or "rw+" for read and write mode ("rw+" opens the file for update whereas "rw" removes it before. So the 2 modes are different only if the file already exists).
        Throws:
        IOException - If an I/O error ocurred.
      • BEBufferedRandomAccessFile

        public BEBufferedRandomAccessFile​(String name,
                                          String mode,
                                          int bufferSize)
                                   throws IOException
        Constructor. Always needs a size for the buffer.
        Parameters:
        name - The name of the file associated with the buffer
        mode - "r" for read, "rw" or "rw+" for read and write mode ("rw+" opens the file for update whereas "rw" removes it before. So the 2 modes are different only if the file already exists).
        bufferSize - The number of bytes to buffer
        Throws:
        IOException - If an I/O error ocurred.
      • BEBufferedRandomAccessFile

        public BEBufferedRandomAccessFile​(String name,
                                          String mode)
                                   throws IOException
        Constructor. Uses the default value for the byte-buffer size (512 bytes).
        Parameters:
        name - The name of the file associated with the buffer
        mode - "r" for read, "rw" or "rw+" for read and write mode ("rw+" opens the file for update whereas "rw" removes it before. So the 2 modes are different only if the file already exists).
        Throws:
        IOException - If an I/O error ocurred.
    • Method Detail

      • writeShort

        public final void writeShort​(int v)
                              throws IOException
        Writes the short value of v (i.e., 16 least significant bits) to the output. Prior to writing, the output should be realigned at the byte level.

        Signed or unsigned data can be written. To write a signed value just pass the short value as an argument. To write unsigned data pass the int value as an argument (it will be automatically casted, and only the 16 least significant bits will be written).

        Specified by:
        writeShort in interface BinaryDataOutput
        Parameters:
        v - The value to write to the output
        Throws:
        IOException - If an I/O error ocurred.
      • writeInt

        public final void writeInt​(int v)
                            throws IOException
        Writes the int value of v (i.e., the 32 bits) to the output. Prior to writing, the output should be realigned at the byte level.
        Specified by:
        writeInt in interface BinaryDataOutput
        Parameters:
        v - The value to write to the output
        Throws:
        IOException - If an I/O error ocurred.
      • writeLong

        public final void writeLong​(long v)
                             throws IOException
        Writes the long value of v (i.e., the 64 bits) to the output. Prior to writing, the output should be realigned at the byte level.
        Specified by:
        writeLong in interface BinaryDataOutput
        Parameters:
        v - The value to write to the output
        Throws:
        IOException - If an I/O error ocurred.
      • writeFloat

        public final void writeFloat​(float v)
                              throws IOException
        Writes the IEEE float value v (i.e., 32 bits) to the output. Prior to writing, the output should be realigned at the byte level.
        Specified by:
        writeFloat in interface BinaryDataOutput
        Parameters:
        v - The value to write to the output
        Throws:
        IOException - If an I/O error ocurred.
      • writeDouble

        public final void writeDouble​(double v)
                               throws IOException
        Writes the IEEE double value v (i.e., 64 bits) to the output. Prior to writing, the output should be realigned at the byte level.
        Specified by:
        writeDouble in interface BinaryDataOutput
        Parameters:
        v - The value to write to the output
        Throws:
        IOException - If an I/O error ocurred.
      • readShort

        public final short readShort()
                              throws IOException,
                                     EOFException
        Reads a signed short (i.e., 16 bit) from the input. Prior to reading, the input should be realigned at the byte level.
        Specified by:
        readShort in interface BinaryDataInput
        Returns:
        The next byte-aligned signed short (16 bit) from the input.
        Throws:
        EOFException - If the end-of file was reached before getting all the necessary data.
        IOException - If an I/O error ocurred.
      • readUnsignedShort

        public final int readUnsignedShort()
                                    throws IOException,
                                           EOFException
        Reads an unsigned short (i.e., 16 bit) from the input. It is returned as an int since Java does not have an unsigned short type. Prior to reading, the input should be realigned at the byte level.
        Specified by:
        readUnsignedShort in interface BinaryDataInput
        Returns:
        The next byte-aligned unsigned short (16 bit) from the input, as an int.
        Throws:
        EOFException - If the end-of file was reached before getting all the necessary data.
        IOException - If an I/O error ocurred.
      • readInt

        public final int readInt()
                          throws IOException,
                                 EOFException
        Reads a signed int (i.e., 32 bit) from the input. Prior to reading, the input should be realigned at the byte level.
        Specified by:
        readInt in interface BinaryDataInput
        Returns:
        The next byte-aligned signed int (32 bit) from the input.
        Throws:
        EOFException - If the end-of file was reached before getting all the necessary data.
        IOException - If an I/O error ocurred.
      • readUnsignedInt

        public final long readUnsignedInt()
                                   throws IOException,
                                          EOFException
        Reads an unsigned int (i.e., 32 bit) from the input. It is returned as a long since Java does not have an unsigned short type. Prior to reading, the input should be realigned at the byte level.
        Specified by:
        readUnsignedInt in interface BinaryDataInput
        Returns:
        The next byte-aligned unsigned int (32 bit) from the input, as a long.
        Throws:
        EOFException - If the end-of file was reached before getting all the necessary data.
        IOException - If an I/O error ocurred.
      • readLong

        public final long readLong()
                            throws IOException,
                                   EOFException
        Reads a signed long (i.e., 64 bit) from the input. Prior to reading, the input should be realigned at the byte level.
        Specified by:
        readLong in interface BinaryDataInput
        Returns:
        The next byte-aligned signed long (64 bit) from the input.
        Throws:
        EOFException - If the end-of file was reached before getting all the necessary data.
        IOException - If an I/O error ocurred.
      • readFloat

        public final float readFloat()
                              throws EOFException,
                                     IOException
        Reads an IEEE single precision (i.e., 32 bit) floating-point number from the input. Prior to reading, the input should be realigned at the byte level.
        Specified by:
        readFloat in interface BinaryDataInput
        Returns:
        The next byte-aligned IEEE float (32 bit) from the input.
        Throws:
        EOFException - If the end-of file was reached before getting all the necessary data.
        IOException - If an I/O error ocurred.
      • readDouble

        public final double readDouble()
                                throws IOException,
                                       EOFException
        Reads an IEEE double precision (i.e., 64 bit) floating-point number from the input. Prior to reading, the input should be realigned at the byte level.
        Specified by:
        readDouble in interface BinaryDataInput
        Returns:
        The next byte-aligned IEEE double (64 bit) from the input.
        Throws:
        EOFException - If the end-of file was reached before getting all the necessary data.
        IOException - If an I/O error ocurred.