BigDecimalConverter is not precise
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Key: WICKET-1344
URL: https://issues.apache.org/jira/browse/WICKET-1344
Project: Wicket
Issue Type: Improvement
Components: wicket
Affects Versions: 1.3.1
Reporter: Andri Saar
Priority: Minor
Attachments: BigDecimalConverter.patch
Currently, if we use the BigDecimalConverter class, it converts the values by
first letting the NumberFormat to parse the value into a Double, which the
BigDecimalConverter class in turn turns into a BigDecimal.
Unfortunately such an implementation loses precision, for example if we enter
"123.45" in a form, it can be converted to "123.45000000000001" or
"123.44999999999999999" thanks to the conversion to a Double.
Fixing the issue is rather simple: check if the NumberFormat you get is a
DecimalFormat, and if yes, simply call format.setParseBigDecimal(true) and the
NumberFormat will interpret the values correctly.
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