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From Sébastien Brisard (JIRA) <j...@apache.org>
Subject [jira] [Created] (MATH-875) Deprecate RealVector.sparseIterator() and FieldVector.sparseIterator()
Date Mon, 08 Oct 2012 05:38:02 GMT
Sébastien Brisard created MATH-875:
--------------------------------------

             Summary: Deprecate RealVector.sparseIterator() and FieldVector.sparseIterator()
                 Key: MATH-875
                 URL: https://issues.apache.org/jira/browse/MATH-875
             Project: Commons Math
          Issue Type: Improvement
    Affects Versions: 3.1, 4.0
            Reporter: Sébastien Brisard
            Priority: Minor


Following MATH-870, {{RealVector.sparseIterator()}} and {{FieldVector.sparseIterator()}} have
become useless. Their interface was confusing. Indeed, the Javadoc states

{quote}
Specialized implementations may choose to not iterate over all dimensions, either because
those values are unset, or are equal to defaultValue(), or are small enough to be ignored
for the purposes of iteration.
{quote}

The reference to {{defaultValue()}} (which does *not* exist) suggests that the interface offers
the flexibility to chose the value which is not stored in the sparse implementation. On the
other hand, "small enough to be ignored" suggests that this default value is zero.

In version 3.1, this method will be deprecated, to be removed in 4.0.

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