Introduced ConverterBuilder which exposes API to register Spring GenericConverters for the use with a store module's CustomConversions. This allows simple registration of such converters using Java 8 lambdas.
ConverterAware converters = ConverterBuilder.reading(String.class, Long.class,
it -> Long.valueOf(it)).andWriting(it -> Object::toString);
The setup can also be done from the reading side which would just need the method invocations inverted. The resulting ConverterAware will expose the registered converters so that they can be easily handed to a CustomConversions instance. Partial creation of either reading or writing converters is possible, too with the returned instance then only exposing one of the two converters.
CustomConversions now considers ConverterAware and treats them appropriately for ConvertiblePair registration as well as during the registration in the ConversionService. Tweaked parameter types in CustomConversions to rather accept a Collection<?> for the converters (previously List<?>). Also, registerConverterIn(…) now takes a ConverterRegistry over a GenericConversionService. Polished Javadoc and non-null assertions.
Original pull request: #209.
a190c082f7