Lucene Interval Fields

Store and query intervals in Lucene.

Creating documents

Document doc = new Document();
doc.add(new Field("name", "George Washington", Field.Store.YES, Field.Index.NO));
doc.add(new NumericIntervalField("term", true, 1789, 1793));
doc.add(new NumericIntervalField("term", true, 1793, 1797));
indexWriter.addDocument(doc);

doc = new Document();
doc.add(new Field("name", "John Adams", Field.Store.YES, Field.Index.NO));
doc.add(new NumericIntervalField("term", true, 1797, 1801));
indexWriter.addDocument(doc);

doc = new Document();
doc.add(new Field("name", "Thomas Jefferson", Field.Store.YES, Field.Index.NO));
doc.add(new NumericIntervalField("term", true, 1801, 1805));
doc.add(new NumericIntervalField("term", true, 1805, 1809));
indexWriter.addDocument(doc);

...

Queries

// List all presidents in office in the 1700s.
searcher.search(new NumericIntervalIntersectionQuery("term", 1700, 1799), collector)

// Who was president in 1804?
searcher.search(new InNumericIntervalQuery("term", 1804), collector)

Known limitations

• Only supports long values.