SolrServer solrServer = getActiveSolrServer();
SolrQuery query = new SolrQuery("*:*");
query.addFilterQuery(entryTypeField + ":" + METADATA_ENTRY);
query.addFilterQuery(broaderField + ":" + ClientUtils.escapeQueryChars(broadTopicId));
query.addField(conceptUriField);
query.addSortField(conceptUriField, SolrQuery.ORDER.asc);
try {
for (SolrDocument result : solrServer.query(query).getResults()) {
narrowerConcepts.add(result.getFirstValue(conceptUriField).toString());
}
} catch (SolrServerException e) {