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https://issues.apache.org/jira/browse/SOLR-2027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12976792#action_12976792
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Sascha Szott commented on SOLR-2027:
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At least a notice should be added to the Javadoc method description since it
seems to be uncommon to respond with null in case of an empty facet field.
> SolrJ FacetField should never return null from getValues()
> ----------------------------------------------------------
>
> Key: SOLR-2027
> URL: https://issues.apache.org/jira/browse/SOLR-2027
> Project: Solr
> Issue Type: Improvement
> Components: clients - java
> Affects Versions: 1.4.1
> Reporter: David Smiley
> Priority: Minor
>
> In some circumstances, FacetField.getValues() will return null. I'd like for
> my iteration code to simply be:
> {code:java}
> for (c : ff.getValues() {
> // ...
> }
> {code}
> However this will throw an NPE if I don't wrap this in either a null check or
> this check: ff.getValueCount() > 0
> I propose that getValues() return a Collections.EMPTY_LIST if the internal
> value is null.
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