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
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SmartColumnFactory
public SmartColumnFactory(CachedColumnFactory bulkColumnFactory)
- Constructor.
- Parameters:
bulkColumnFactory
- column factory that does the work of
storing varying columns
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 storednrow
- number of elements to be stored;
if a value <0 is supplied,
an indeterminate number will be stored
- Returns:
- storage object
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