Review

5

org/apache/lucene/search/FieldCacheImpl$AutoCache.java

createValue(IndexReader, Entry)

class FieldCacheImpl.AutoCache {
    protected Object createValue(IndexReader reader, Entry entryKey)
        throws IOException {
      String field = StringHelper.intern((String) entryKey.field);
      TermEnum enumerator = reader.terms (new Term (field));
      try {
        Term term = enumerator.term();
        if (term == null) {
          throw new RuntimeException ("no terms in field " + field + " - cannot determine type");
        }
        Object ret = null;
        if (term.field() == field) {
          String termtext = term.text().trim();

          try {
            Integer.parseInt (termtext);
            ret = wrapper.getInts (reader, field);
          } catch (NumberFormatException nfe1) {
            try {
              Long.parseLong(termtext);
              ret = wrapper.getLongs (reader, field);
            } catch (NumberFormatException nfe2) {
              try {
                Float.parseFloat (termtext);
                ret = wrapper.getFloats (reader, field);
              } catch (NumberFormatException nfe3) {
                ret = wrapper.getStringIndex (reader, field);
              }
            }
          }          
        } else {
          throw new RuntimeException ("field \"" + field + "\" does not appear to be indexed");
        }
        return ret;
      } finally {
        enumerator.close();
      }
    }
}