code: @Override
  	public String getSolrTypeName() {
  
  		Indexed indexedAnnotation = getIndexAnnotation();
  		if (indexedAnnotation != null && StringUtils.hasText(indexedAnnotation.type())) {
  			return indexedAnnotation.type();
  		}
  		return getActualType().getSimpleName().toLowerCase();
  	}
docs: /*
  (non-Javadoc)
  @see org.springframework.data.solr.core.mapping.SolrPersistentProperty#getSolrTypeName()