com.vertica.sdk.DFSFileReader Class Reference

Collaboration diagram for com.vertica.sdk.DFSFileReader:

Public Member Functions
	DFSFileReader (DFSFile dfsFile)
void	close () throws UdfException, DestroyInvocation
boolean	isOpen ()
void	open () throws UdfException, DestroyInvocation
int	read (ByteBuffer buffer, int size) throws UdfException, DestroyInvocation
long	seek (long offset, int origin) throws UdfException, DestroyInvocation
long	size ()

Member Function Documentation

void com.vertica.sdk.DFSFileReader.close

(

)

throws UdfException, DestroyInvocation

Closes the file opened for reading

Exceptions

UdfException	UDF problem
DestroyInvocation	vertica canceling – do not catch or handle

int com.vertica.sdk.DFSFileReader.read	(	ByteBuffer	buffer,
		int	size
	)		throws UdfException, DestroyInvocation

Reads 'size' of bytes into buffer pointed by 'ptr' from the file opened for reading.

Parameters

buffer	buffer to read into
size	number of bytes to read

Returns

number of bytes actually read, 0 if no bytes were read, indicates the EOF.

Exceptions

UdfException	UDF problem
DestroyInvocation	vertica canceling – do not catch or handle

long com.vertica.sdk.DFSFileReader.seek	(	long	offset,
		int	origin
	)		throws UdfException, DestroyInvocation

Reposition the read file offset.

Parameters

offset	location to seek to
origin	origin from which to seek

Returns

the new file offset.

Exceptions

UdfException	UDF problem
DestroyInvocation	vertica canceling – do not catch or handle