Quadcap Embeddable Database

com.quadcap.sql.file.SegmentManager Interface Reference

Inheritance diagram for com.quadcap.sql.file.SegmentManager:

List of all members.

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Detailed Description

Interface to be implemented by segment allocators.

Author:

Stan Bailes

Definition at line 50 of file SegmentManager.java.

Public Member Functions
RandomAccessInputStream	getInputStream (long seg) throws IOException
	Return a new input stream, reading from the region with the specified root segment.
RandomAccessOutputStream	getOutputStream (long seg) throws IOException
	Return a new output stream, writing to the region with the specified root segment.
RandomAccess	getStream (long seg) throws IOException
	Return the random-access region with the specified root segment.
void	freeSegment (long seg) throws IOException
	Destroy the stream with the specified root segment and free up the 7 * storage it was using.
long	putBytes (byte[] buf) throws IOException
	Create a new segment with the specified bytes value and return its reference.
byte[]	getBytes (long seg) throws IOException
	Return the segment as a byte array.
void	updateBytes (long seg, byte[] buf) throws IOException
	Update a segment with new value bytes.

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Member Function Documentation

void com.quadcap.sql.file.SegmentManager.freeSegment (  long  seg  )  throws IOException

Destroy the stream with the specified root segment and free up the 7 * storage it was using. Parameters: segment  the root segment of the region Exceptions: IOException  if the segment number isn't valid, or if another error is detected trying to access the region. Implemented in com.quadcap.sql.file.BlockFile.

byte [] com.quadcap.sql.file.SegmentManager.getBytes (  long  seg  )  throws IOException

Return the segment as a byte array. Parameters: seg  the segment id Returns: the value of the segment's bytes Implemented in com.quadcap.sql.file.BlockFile.

RandomAccessInputStream com.quadcap.sql.file.SegmentManager.getInputStream (  long  seg  )  throws IOException

Return a new input stream, reading from the region with the specified root segment. Parameters: segment  the root segment of the region Returns: an InputStream bound to the region. Exceptions: IOException  if the segment number isn't valid, or if another error is detected trying to access the region. Implemented in com.quadcap.sql.file.BlockFile.

RandomAccessOutputStream com.quadcap.sql.file.SegmentManager.getOutputStream (  long  seg  )  throws IOException

Return a new output stream, writing to the region with the specified root segment. Parameters: segment  the root segment of the region Returns: an OutputStream bound to the region. Exceptions: IOException  if the segment number isn't valid, or if another error is detected trying to access the region. Implemented in com.quadcap.sql.file.BlockFile.

RandomAccess com.quadcap.sql.file.SegmentManager.getStream (  long  seg  )  throws IOException

Return the random-access region with the specified root segment. Implemented in com.quadcap.sql.file.BlockFile.

long com.quadcap.sql.file.SegmentManager.putBytes (  byte[]  buf  )  throws IOException

Create a new segment with the specified bytes value and return its reference. Parameters: buf  the value to write to the new segment Returns: the segment id Implemented in com.quadcap.sql.file.BlockFile.

void com.quadcap.sql.file.SegmentManager.updateBytes (  long  seg, byte[]  buf )  throws IOException

Update a segment with new value bytes. Parameters: buf  the value to write to the segment seg  the segment id Implemented in com.quadcap.sql.file.BlockFile.