Examples with Indexed io.druid.segment.data.Indexed used on opensource projects

Example 6 with Indexed

use of io.druid.segment.data.Indexed in project druid by druid-io.

the class ColumnSelectorBitmapIndexSelector method getDimensionValues.

@Override
public Indexed<String> getDimensionValues(String dimension) {
    if (isFilterableVirtualColumn(dimension)) {
        // Virtual columns don't have dictionaries or indexes.
        return null;
    }
    final Column columnDesc = index.getColumn(dimension);
    if (columnDesc == null || !columnDesc.getCapabilities().isDictionaryEncoded()) {
        return null;
    }
    final DictionaryEncodedColumn<String> column = columnDesc.getDictionaryEncoding();
    return new Indexed<String>() {

        @Override
        public Class<? extends String> getClazz() {
            return String.class;
        }

        @Override
        public int size() {
            return column.getCardinality();
        }

        @Override
        public String get(int index) {
            return column.lookupName(index);
        }

        @Override
        public int indexOf(String value) {
            return column.lookupId(value);
        }

        @Override
        public Iterator<String> iterator() {
            return IndexedIterable.create(this).iterator();
        }
    };
}