# convertValueIfNecessary method

1. @protected

Object? convertValueIfNecessary(

1. Object? value,
2. Class target,
3. Class? source

)

Convert a given `value` into the specified `targetType` if necessary.

This method uses a ConversionService to handle type conversions. If no conversion service is explicitly set, it falls back to DefaultConversionService.getSharedInstance.

If the `targetType` is `null`, the value is simply cast to `T`.

### Parameters

- `value`: The input object to convert.
- `targetType`: The desired target type.
- `source`: An optional Class describing the source type (used for conversion context).

### Example

    final result = convertValueIfNecessary<int>('42', Class<int>(null, 'dart'));
    print(result); // 42

Converts a value to the target type if necessary using the conversion service.

This method is used during property population to ensure values are of the correct type for the target field or parameter.

@param value The value to convert @param target The target type @param source The source type (optional) @return The converted value, or the original value if no conversion needed

## Implementation

    @protected
    Object? convertValueIfNecessary(Object? value, Class target, Class? source) {
      if (value == null) {
        return null;
      }

      if (target.isInstance(value)) {
        return value;
      }

      // Use conversion service if available
      ConversionService? conversionService = getConversionService();
      if (conversionService.canConvert(source, target)) {
        return conversionService.convertTo(value, target, source);
      }

      return value;
    }