/**
* Transform values in the collection from Strings to Objects, using {@link
* com.atlassian.jira.issue.search.LuceneFieldSorter#getValueFromLuceneField(String)}
*
* @param values A Collection of Strings, obtained from the Lucene Index
* @param mapper A statsMapper used to convert to objects
* @return a collection of transformed objects, never null
*/
private static Collection transformAndRemoveInvaid(Collection values, StatisticsMapper mapper) {
Collection output = new ArrayList();
for (final Object value1 : values) {
String key = (String) value1;
final Object value;
if (key != null) {
value = mapper.getValueFromLuceneField(key);
} else {
value = null;
}
// only valid values should be added to the map
if (mapper.isValidValue(value)) {
output.add(value);
}
}
return output;
}
