[OLINGO-1545] OData V4: Scientific notation value of Edm.Double cannot be processed

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: (Java) V4 4.8.0
• Component/s: odata4-server
• Assignee: Unassigned
• Reporter: Ramya Vasanth
• Created: 17/Sep/21 05:03
• Updated: 17/Sep/21 05:10
• Resolved: 17/Sep/21 05:10

Description

As per 

    https://en.wikipedia.org/wiki/Double-precision_floating-point_format#IEEE_754_double-precision_binary_floating-point_format:_binary64

If a decimal string with at most 15 significant digits is converted to IEEE 754 double-precision representation, and then converted back to a decimal string with the same number of digits, the final result should match the original string*.* If an IEEE 754 double-precision number is converted to a decimal string with at least 17 significant digits, and then converted back to double-precision representation, the final result must match the original number.

The string 5.9999999999999998e-01 parsed back to Double is equal to 0.6.

These validations often fail and POST requests having payloads with values like as 0.5, 0.6, 1.1 will get converted to 5e-1, 5.99999e-1...

The line causing the isue is in Edm.Single and Edm.Double classes

      if (result.isInfinite() || BigDecimal.valueOf(result).compareTo(bigDecimalValue) != 0) {...