rootvector2 opened a new pull request, #403:
URL: https://github.com/apache/commons-beanutils/pull/403

   Port of #401 to the `1.X` branch.
   
   `DecimalLocaleConverter.parse` builds a `DecimalFormat` but never enables 
`setParseBigDecimal`, so `DecimalFormat.parse` returns a clamped `Long` (when 
the value fits in long) or a lossy `Double` (out of long range). 
`BigIntegerLocaleConverter` and `BigDecimalLocaleConverter` then derive their 
result from that `Number`, so a value past `long`/`double` range comes back 
silently wrong: `9999999999999999999` becomes `9223372036854775807` for 
`BigInteger` and `1.0E+19` for `BigDecimal`. The non-locale 
`BigIntegerConverter`/`BigDecimalConverter` avoid this by parsing the string 
directly.
   
   Added a protected `isParseBigDecimal()` hook (default `false`) on 
`DecimalLocaleConverter` and pass it to `formatter.setParseBigDecimal(...)`; 
only `BigIntegerLocaleConverter` and `BigDecimalLocaleConverter` override it to 
`true`, so `DecimalFormat` returns a lossless `BigDecimal` for them while the 
narrowing `Byte`/`Short`/`Integer`/`Long`/`Float`/`Double` converters keep the 
`Long`/`Double` path. `BigIntegerLocaleConverter` converts the `BigDecimal` via 
`toBigInteger()`.
   
   Added regression tests to `BigIntegerLocaleConverterTest` and 
`BigDecimalLocaleConverterTest`; both fail without the runtime change 
(`9223372036854775807` and `1.0E+19` respectively).
   
   `mvn test -Dtest='*LocaleConverterTest'` is green (106 tests). The only 
failure in a full `mvn` run is 
`LocaleBeanificationTest.testContextClassloaderIndependence`, a pre-existing 
flake unrelated to this change (it fails the same way on a clean `1.X` 
checkout).
   
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