uk.ac.starlink.ttools.plot2.data

Class SmartColumnFactory

java.lang.Object

uk.ac.starlink.ttools.plot2.data.SmartColumnFactory

All Implemented Interfaces:

CachedColumnFactory

public class SmartColumnFactory
extends Object
implements CachedColumnFactory

CachedColumnFactory implementation that is able to spot non-varying columns and represent them efficiently. It delegates to a supplied CachedColumnFactory instance that actually performs the storage.

Since:

8 Feb 2013

Author:

Mark Taylor

Constructor Summary

Constructors

Constructor and Description
SmartColumnFactory(CachedColumnFactory bulkColumnFactory) Constructor.

Method Summary

Modifier and Type	Method and Description
CachedColumn	createColumn(StorageType type, long nrow) Creates a data storage object capable of storing a vector of a given type.

Methods inherited from class java.lang.Object

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

Constructor Detail

SmartColumnFactory

public SmartColumnFactory(CachedColumnFactory bulkColumnFactory)

Constructor.

Parameters:

bulkColumnFactory - column factory that does the work of storing varying columns

Method Detail

createColumn

public CachedColumn createColumn(StorageType type,
                                 long nrow)

Description copied from interface: CachedColumnFactory

Creates a data storage object capable of storing a vector of a given type. Both fixed and unknown element counts are supported.

Specified by:

createColumn in interface CachedColumnFactory

Parameters:

type - data type of elements to be stored

nrow - maximum number of elements to be stored; if a value <0 is supplied, an indeterminate number is permitted

Returns:

storage object