Hi there,
I'm migrating an application from Lucene 4.7.0 to Lucene 6.0.1.
I'm facing a problem with this piece of code :
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public List<Object> getDistinctValues(IndexReader reader, EventField field)
throws IOException {
List<Object> values = new ArrayList<Object>();
Fields fields = MultiFields.getFields(reader);
if (fields == null) return values;
Terms terms = fields.terms(field.name());
if (terms == null) return values;
TermsEnum iterator = terms.iterator();
Class<? extends Object> type = field.getJavaType();
BytesRef value = iterator.next();
while (value != null) {
if (type == Long.class) {
values.add(LegacyNumericUtils.prefixCodedToLong(value));
} else if (type == Integer.class) {
values.add(LegacyNumericUtils.prefixCodedToInt(value));
} else if (type == Boolean.class) {
values.add(LegacyNumericUtils.prefixCodedToInt(value) == 1 ? TRUE :
FALSE);
} else if (type == Date.class) {
values.add(new Date(LegacyNumericUtils.prefixCodedToLong(value)));
} else if (type == String.class) {
values.add(value.utf8ToString());
} else {
log.warn("getDistinctValues: ignoring field " + field + " of type "
+ type);
}
value = iterator.next();
}
return values;
}
The aim of this method is to get all terms present in a field directly in the
correct java type. I'm seeing just now that NumericUtils is an internal class,
so I should not have used it.
For now, I can use LegacyNumericUtils, but that's a very temporary solution.
What is the best approach to achieve my goal ?
Thanks in advance for any help.
Ludovic
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