[jira] [Work logged] (NUMBERS-90) DoublePrecisionContext

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NUMBERS-90?focusedWorklogId=187462&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-187462 ]

ASF GitHub Bot logged work on NUMBERS-90:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 20/Jan/19 02:31
            Start Date: 20/Jan/19 02:31
    Worklog Time Spent: 10m 
      Work Description: darkma773r commented on pull request #28: NUMBERS-90: adding DoublePrecisionContext and FloatPrecisionContext
URL: https://github.com/apache/commons-numbers/pull/28
 
 
   Adding DoublePrecisionContext and FloatPrecisionContext abstract classes along with simple epsilon-based implementations. I also created a package named "precision" for these and moved the "Precision" utility class there as well.
   
   These changes are required for GEOMETRY-11.
 
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Issue Time Tracking
-------------------

            Worklog Id:     (was: 187462)
            Time Spent: 10m
    Remaining Estimate: 0h

> DoublePrecisionContext
> ----------------------
>
>                 Key: NUMBERS-90
>                 URL: https://issues.apache.org/jira/browse/NUMBERS-90
>             Project: Commons Numbers
>          Issue Type: New Feature
>            Reporter: Matt Juntunen
>            Priority: Blocker
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> We should add a new class to commons-numbers-core that encapsulates configurable strategies for comparing doubles. This is required for GEOMETRY-11. Here is what I'm picturing:
> {code:java}
> // abstract class for the general concept of comparisons
> public abstract class DoublePrecisionContext implements Comparator<Double> {
>     public abstract boolean equals(double a, double b);
>     public int compare(double a, double b) { /* ... */ }
>     public int compare(Double a, Double b) { /* ... */ }
> }
> // ...
> // concrete class implementing a specific strategy
> public class EpsilonUlpDoublePrecisionContext extends DoublePrecisionContext {
>     public EpsilonUlpDoublePrecisionContext(double eps, double maxUlps) { /* ... */ }
>     @Override
>     public boolean equals(double a, double b) { /* ... */ }
> } 
> {code}



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