Package com.adobe.internal.io

Class NonCachedRandomAccessFileByteReader

java.lang.Object

com.adobe.internal.io.NonCachedRandomAccessFileByteReader

All Implemented Interfaces:

ByteReader

public class NonCachedRandomAccessFileByteReader
extends Object

A ByteReader that wraps a RandomAccessFile. No buffering is provided so all file access is direct - this is slower than buffering.

Field Summary

Fields inherited from interface com.adobe.internal.io.ByteReader

EOF

Constructor Summary

Constructors

Constructor	Description
NonCachedRandomAccessFileByteReader(RandomAccessFile file)	This class implements a ByteReader in which the bytes are read from a RandomAccessFile.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes this ByteReader and releases any system resources associated with this stream.
long	length()	Returns the number of total bytes in the repository that are visible through this API.
int	read(long position)	Read a single byte from the underlying bytes at the given position.
int	read(long position, byte[] b, int offset, int length)	Transfers bytes from the underlying repository into the given destination array.

Methods inherited from class java.lang.Object

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

Constructor Detail

NonCachedRandomAccessFileByteReader

public NonCachedRandomAccessFileByteReader(RandomAccessFile file)
                                    throws IOException

This class implements a ByteReader in which the bytes are read from a RandomAccessFile.

Parameters:

file - the file to wrap with the ByteReader

Throws:

IOException

Method Detail

read

public int read(long position)
         throws IOException

Description copied from interface: ByteReader

Read a single byte from the underlying bytes at the given position.

Specified by:

read in interface ByteReader

Parameters:

position - the position to read the byte from.

Returns:

the byte at the postion or EOF if the position is outside of the legal range.

Throws:

IOException - if an error occurs during the read operation

See Also:

ByteReader.read(long)

read

public int read(long position,
                byte[] b,
                int offset,
                int length)
         throws IOException

Description copied from interface: ByteReader

Transfers bytes from the underlying repository into the given destination array. Copy up to length bytes from the repository starting at the postion given into the given array starting at the given offset.

Specified by:

read in interface ByteReader

Parameters:

position - the position to read the byte from.

b - the array to write the bytes into.

offset - the offset in the array at which the first byte is written.

length - the maximum number of bytes to write into the array.

Returns:

the number of bytes actually written to the array.

Throws:

IOException - if an error occurs during the read operation

See Also:

ByteReader.read(long, byte[], int, int)

length

public long length()
            throws IOException

Description copied from interface: ByteReader

Returns the number of total bytes in the repository that are visible through this API.

Specified by:

length in interface ByteReader

Returns:

the number of bytes in the repository.

Throws:

IOException - if an error occurs while trying to determine the length

See Also:

ByteReader.length()

close

public void close()
           throws IOException

Description copied from interface: ByteReader

Closes this ByteReader and releases any system resources associated with this stream.

Specified by:

close in interface ByteReader

Throws:

IOException - if an error occurs while trying to close

See Also:

ByteReader.close()