public class FileChannelRandomAccessSource extends Object implements IRandomAccessSource
FileChannel
. The entire channel will be mapped into memory for efficient reads.
Constructor and Description |
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FileChannelRandomAccessSource(FileChannel channel)
Constructs a new FileChannelRandomAccessSource based on the specified FileChannel.
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Modifier and Type | Method and Description |
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void |
close()
Closes this source.
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int |
get(long position)
Gets a byte at the specified position
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int |
get(long position, byte[] bytes, int off, int len)
Read an array of bytes of specified length from the specified position of source to the buffer applying the offset.
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long |
length()
Gets the length of the source
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public FileChannelRandomAccessSource(FileChannel channel) throws IOException
FileChannelRandomAccessSource
based on the specified FileChannel. The entire source channel will be mapped into memory.
channel
- the channel to use as the backing store
IOException
- if the channel cannot be opened or mapped
public void close() throws IOException
close
in interface IRandomAccessSource
IOException
public int get(long position) throws IOException
get
in interface IRandomAccessSource
position
- byte position
IOException
- in case of any reading error.
public int get(long position, byte[] bytes, int off, int len) throws IOException
get
in interface IRandomAccessSource
position
- the position in the RandomAccessSource to read from
bytes
- output buffer
off
- offset into the output buffer where results will be placed
len
- the number of bytes to read
IOException
- in case of any I/O error.
public long length()
length
in interface IRandomAccessSource
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