WebConversionService Class — spring-boot Architecture

Source Code

core/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/format/WebConversionService.java lines 42–101

public class WebConversionService extends DefaultFormattingConversionService {

	private static final boolean JSR_354_PRESENT = ClassUtils.isPresent("javax.money.MonetaryAmount",
			WebConversionService.class.getClassLoader());

	/**
	 * Create a new WebConversionService that configures formatters with the provided
	 * date, time, and date-time formats, or registers the default if no custom format is
	 * provided.
	 * @param dateTimeFormatters the formatters to use for date, time, and date-time
	 * formatting
	 * @since 2.3.0
	 */
	public WebConversionService(DateTimeFormatters dateTimeFormatters) {
		super(false);
		if (dateTimeFormatters.isCustomized()) {
			addFormatters(dateTimeFormatters);
		}
		else {
			addDefaultFormatters(this);
		}
	}

	private void addFormatters(DateTimeFormatters dateTimeFormatters) {
		addFormatterForFieldAnnotation(new NumberFormatAnnotationFormatterFactory());
		if (JSR_354_PRESENT) {
			addFormatter(new CurrencyUnitFormatter());
			addFormatter(new MonetaryAmountFormatter());
			addFormatterForFieldAnnotation(new Jsr354NumberFormatAnnotationFormatterFactory());
		}
		registerJsr310(dateTimeFormatters);
		registerJavaDate(dateTimeFormatters);
	}

	private void registerJsr310(DateTimeFormatters dateTimeFormatters) {
		DateTimeFormatterRegistrar dateTime = new DateTimeFormatterRegistrar();
		configure(dateTimeFormatters::getDateFormatter, dateTime::setDateFormatter);
		configure(dateTimeFormatters::getTimeFormatter, dateTime::setTimeFormatter);
		configure(dateTimeFormatters::getDateTimeFormatter, dateTime::setDateTimeFormatter);
		dateTime.registerFormatters(this);
	}

	private void configure(Supplier<@Nullable DateTimeFormatter> supplier, Consumer<DateTimeFormatter> consumer) {
		DateTimeFormatter formatter = supplier.get();
		if (formatter != null) {
			consumer.accept(formatter);
		}
	}

	private void registerJavaDate(DateTimeFormatters dateTimeFormatters) {
		DateFormatterRegistrar dateFormatterRegistrar = new DateFormatterRegistrar();
		String datePattern = dateTimeFormatters.getDatePattern();
		if (datePattern != null) {
			DateFormatter dateFormatter = new DateFormatter(datePattern);
			dateFormatterRegistrar.setFormatter(dateFormatter);
		}
		dateFormatterRegistrar.registerFormatters(this);
	}

}