Package com.itextpdf.text.io
Class RAFRandomAccessSource
java.lang.Object
com.itextpdf.text.io.RAFRandomAccessSource
- All Implemented Interfaces:
RandomAccessSource
A RandomAccessSource that uses a
RandomAccessFile
as it's source
Note: Unlike most of the RandomAccessSource implementations, this class is not thread safe-
Field Summary
FieldsModifier and TypeFieldDescriptionprivate final long
The length of the underling RAF.private final RandomAccessFile
The source -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
close()
Closes the underlying RandomAccessFileint
get
(long position) Gets a byte at the specified positionint
get
(long position, byte[] bytes, int off, int len) Gets an array at the specified position.long
length()
Note: the length is determined when theRAFRandomAccessSource
is constructed.
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Field Details
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raf
The source -
length
private final long lengthThe length of the underling RAF. Note that the length is cached at construction time to avoid the possibility of IOExceptions when reading the length.
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Constructor Details
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RAFRandomAccessSource
Creates this object- Parameters:
raf
- the source for this RandomAccessSource- Throws:
IOException
- if the RAF can't be read
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Method Details
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get
Gets a byte at the specified position- Specified by:
get
in interfaceRandomAccessSource
- Returns:
- the byte, or -1 if EOF is reached
- Throws:
IOException
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get
Gets an array at the specified position. If the number of bytes requested cannot be read, the bytes that can be read will be placed in bytes and the number actually read will be returned.- Specified by:
get
in interfaceRandomAccessSource
- Parameters:
position
- the position in the RandomAccessSource to read frombytes
- output bufferoff
- offset into the output buffer where results will be placedlen
- the number of bytes to read- Returns:
- the number of bytes actually read, or -1 if the file is at EOF
- Throws:
IOException
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length
public long length()Note: the length is determined when theRAFRandomAccessSource
is constructed. If the file length changes after construction, that change will not be reflected in this call.- Specified by:
length
in interfaceRandomAccessSource
- Returns:
- the length of this source
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close
Closes the underlying RandomAccessFile- Specified by:
close
in interfaceRandomAccessSource
- Throws:
IOException
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