Package uk.ac.starlink.ttools.plot2.data
Class SmartColumnFactory
- java.lang.Object
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- uk.ac.starlink.ttools.plot2.data.SmartColumnFactory
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- All Implemented Interfaces:
CachedColumnFactory
public class SmartColumnFactory extends java.lang.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
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Constructor Summary
Constructors Constructor Description SmartColumnFactory(CachedColumnFactory bulkColumnFactory)
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description CachedColumn
createColumn(StorageType type, long nrow)
Creates a data storage object capable of storing a vector of a given type.
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Constructor Detail
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SmartColumnFactory
public SmartColumnFactory(CachedColumnFactory bulkColumnFactory)
Constructor.- Parameters:
bulkColumnFactory
- column factory that does the work of storing varying columns
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Method Detail
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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 interfaceCachedColumnFactory
- Parameters:
type
- data type of elements to be storednrow
- maximum number of elements to be stored; if a value <0 is supplied, an indeterminate number is permitted- Returns:
- storage object
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