While ModelMapper will attempt to match every destination property to a source property, there will occasionally be destination properties that it cannot find matches for. To verify that all destination properties are matched, call the validate method:


If validation fails, a ValidationException will be thrown with a helpful message describing any destination properties that are unmatched.

Handling Validation Errors

To resolve a validation error resulting from an unmatched destination, you have two options:

  • Create a mapping that maps or ignores any unmatched properties
  • Adjust configuration to try and match any unmatched properties

Alternatively, it may be acceptable to do nothing, in which case any unmatched destination properties will simply be skipped during the mapping process.