protected Converter getConverter()

in tobago-core/src/main/java/org/apache/myfaces/tobago/internal/renderkit/renderer/DateRenderer.java [215:309]
91 lines of code
29 McCabe index (conditional complexity)

  protected Converter getConverter(FacesContext facesContext, T component, Object value) {
    final Converter converter = component.getConverter();
    if (converter != null) {
      // todo: should we warn here, if the type is not "text"?
      return converter;
    } else {
      Class<?> estimatedType = estimateValueType(facesContext, component);
      if (estimatedType == null) {
        // todo: log debug instead of warn
        LOG.warn("Can't estimate type (clientId='{}')!", component.getClientId(facesContext));
        return null;
      } else if (estimatedType.isAssignableFrom(String.class)) {
        // todo: log debug instead of warn
        LOG.warn("No converter for java.lang.String");
        return null;
      } else {
        final DateTimeConverter dateTimeConverter = (DateTimeConverter)
            facesContext.getApplication().createConverter("jakarta.faces.DateTime");
        if (estimatedType.isAssignableFrom(LocalDateTime.class)) {
          dateTimeConverter.setType("localDateTime");
          final Double step = component.getStep();
          if (step == null || step >= 60) {
            dateTimeConverter.setPattern(DateType.PATTERN_DATETIME_LOCAL);
          } else if (step >= 1) {
            dateTimeConverter.setPattern(DateType.PATTERN_DATETIME_LOCAL_SECONDS);
          } else {
            dateTimeConverter.setPattern(DateType.PATTERN_DATETIME_LOCAL_MILLIS);
          }
        } else if (estimatedType.isAssignableFrom(LocalDate.class)) {
          dateTimeConverter.setType("localDate");
          dateTimeConverter.setPattern(DateType.PATTERN_DATE);
        } else if (estimatedType.isAssignableFrom(LocalTime.class)) {
          dateTimeConverter.setType("localTime");
          final Double step = component.getStep();
          if (step == null || step >= 60) {
            dateTimeConverter.setPattern(DateType.PATTERN_TIME);
          } else if (step >= 1) {
            dateTimeConverter.setPattern(DateType.PATTERN_TIME_SECONDS);
          } else {
            dateTimeConverter.setPattern(DateType.PATTERN_TIME_MILLIS);
          }
        } else if (estimatedType.isAssignableFrom(ZonedDateTime.class)) {
          dateTimeConverter.setType("zonedDateTime");
          final Double step = component.getStep();
          if (step == null || step >= 60) {
            dateTimeConverter.setPattern(DateType.PATTERN_DATETIME_LOCAL);
          } else if (step >= 1) {
            dateTimeConverter.setPattern(DateType.PATTERN_DATETIME_LOCAL_SECONDS);
          } else {
            dateTimeConverter.setPattern(DateType.PATTERN_DATETIME_LOCAL_MILLIS);
          }
        } else if (estimatedType.isAssignableFrom(Long.class)) {
          dateTimeConverter.setType("date");
          dateTimeConverter.setPattern(DateType.PATTERN_DATE);
        } else if (estimatedType.isAssignableFrom(Date.class)) {
          dateTimeConverter.setType("date");
          final DateType type = component.getType();
          if (DateType.DATETIME_LOCAL.equals(type)) {
            final Double step = component.getStep();
            if (step == null || step >= 60) {
              dateTimeConverter.setPattern(DateType.PATTERN_DATETIME_LOCAL);
            } else if (step >= 1) {
              dateTimeConverter.setPattern(DateType.PATTERN_DATETIME_LOCAL_SECONDS);
            } else {
              dateTimeConverter.setPattern(DateType.PATTERN_DATETIME_LOCAL_MILLIS);
            }
          } else if (DateType.TIME.equals(type)) {
            final Double step = component.getStep();
            if (step == null || step >= 60) {
              dateTimeConverter.setPattern(DateType.PATTERN_TIME);
            } else if (step >= 1) {
              dateTimeConverter.setPattern(DateType.PATTERN_TIME_SECONDS);
            } else {
              dateTimeConverter.setPattern(DateType.PATTERN_TIME_MILLIS);
            }
          } else {
            dateTimeConverter.setPattern(DateType.PATTERN_DATE);
          }
        } else if (estimatedType.isAssignableFrom(Number.class)) {
          LOG.error("date");
          dateTimeConverter.setType("date");
          dateTimeConverter.setPattern(DateType.PATTERN_DATE);
        } else {
          LOG.warn("Type might not be supported (type='{}' clientId='{}')!",
              estimatedType.getName(), component.getClientId(facesContext));
          throw new RuntimeException();
        }
        if (LOG.isDebugEnabled()) {
          LOG.debug("type='{}' pattern='{}'", dateTimeConverter.getType(), dateTimeConverter.getPattern());
        }

        return dateTimeConverter;
      }
    }
  }