Bug in apache beanutils – BeanUtils.copyProperties – unintended null to 0 conversion for Wrapper classes

BeanUtils.copyProperties(dest,source);

In the above code if the dest has null values for ‘Long’ fields, and source has null values too, during copying of properties, it dumps the value ‘ new Long(0)’ into the dest bean. This has serious issues when that bean is used to persist the values in database as null is different from 0.

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