[MATH-1205] AbstractStorelessUnivariateStatistic should not extend AbstractUnivariateStatistic

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.1
• Fix Version/s: 4.0
• Assignee: Unassigned
• Reporter: Thomas Neidhart
• Created: 20/Feb/15 12:44
• Updated: 13/Apr/15 20:17
• Resolved: 13/Apr/15 20:17

Description

For a storeless statistic it is wrong to extend AbstractUnivariateStatistic as various fields and methods are inherited that do not make sense in case of a storeless statistic.

This means a user can accidentially use a storeless statistic in a wrong way:

        Mean mean = new Mean();
        
        mean.increment(1);
        mean.increment(2);
        
        mean.setData(new double[] { 1, 2, 3});
        
        System.out.println(mean.getResult());
        System.out.println(mean.evaluate());

will output

1.5
2.0