datarecord
Class DataRecord

java.lang.Object
  datarecord.DataRecord

public class DataRecord
extends java.lang.Object

For simplicity, all DataSource and DataSink classes use a single representation for data records in their buffers.
This is it.
A DataRecord is a byte[] plus two scalars: the total number of bytes actually stored in that array, plus the current offset (i.e., the offset to the first byte not already handed out, if a DataSource, or the first not yet written, if a DataSink. Note that the instance variables are all public. This makes it easier to call various Java API methods that read/write things like files and network connections. (Not to mention it avoids having to write a slew of trivial getter/setter functions.)

Version:

$Id: DataRecord.java,v 1.4 2010/01/05 07:59:07 zahorjan Exp $

Field Summary

int	capacity The size of the byte[] called data.
byte[]	data The data
int	length The number of unconsumed bytes of user data remaining in the buffer.
(package private) java.lang.Integer	mapKey An instance variable of what would normally be a local variable.
int	offset An offset into the record.

Constructor Summary

DataRecord(int size)
Create the record and initialize to empty.

Method Summary

(package private) void

reInit() A method to initialize the portions of the DataRecord that may have changed if it has previously been used.

Methods inherited from class java.lang.Object

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

Field Detail

data

public byte[] data

The data

capacity

public int capacity

The size of the byte[] called data.

length

public int length

The number of unconsumed bytes of user data remaining in the buffer.

offset

public int offset

An offset into the record. For read(), the next byte to read. For write()... not used for write().

mapKey

java.lang.Integer mapKey

An instance variable of what would normally be a local variable. Done for the use of DataRecordManager, to achieve blazing speed...

Constructor Detail

DataRecord

DataRecord(int size)

Create the record and initialize to empty. Package scope. (Should be called only by DataRecordManager object.)

Method Detail

reInit

void reInit()

A method to initialize the portions of the DataRecord that may have changed if it has previously been used.