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 Details

    • SmartColumnFactory

      public SmartColumnFactory(CachedColumnFactory bulkColumnFactory)
      Constructor.
      Parameters:
      bulkColumnFactory - column factory that does the work of storing varying columns
  • Method Details

    • 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