Package org.apache.druid.segment.nested

Interface NestedColumnSelectorFactory

All Known Implementing Classes:

CompressedNestedDataComplexColumn, NestedDataColumnV3, NestedDataColumnV4, NestedDataColumnV5, NestedDataComplexColumn

public interface NestedColumnSelectorFactory

Method Summary

Modifier and Type	Method	Description
ColumnValueSelector<?>	makeColumnValueSelector(List<NestedPathPart> path, ColumnSelectorFactory columnSelectorFactory, ReadableOffset readableOffset)	Make a ColumnValueSelector for a nested column.
DimensionSelector	makeDimensionSelector(List<NestedPathPart> path, ExtractionFn extractionFn, ColumnSelectorFactory columnSelectorFactory, ReadableOffset readableOffset)	Make a DimensionSelector for a nested column.

Method Details

makeDimensionSelector

DimensionSelector makeDimensionSelector(List<NestedPathPart> path,
 @Nullable
 ExtractionFn extractionFn,
 ColumnSelectorFactory columnSelectorFactory,
 @Nullable
 ReadableOffset readableOffset)

Make a DimensionSelector for a nested column.

Parameters:

path - nested path, or empty list to read the root

extractionFn - extraction fn to apply in the selector

columnSelectorFactory - factory for underlying selectors, if needed

readableOffset - offset for the selector, if available

makeColumnValueSelector

ColumnValueSelector<?> makeColumnValueSelector(List<NestedPathPart> path,
 ColumnSelectorFactory columnSelectorFactory,
 @Nullable
 ReadableOffset readableOffset)

Make a ColumnValueSelector for a nested column.

Parameters:

path - nested path, or empty list to read the root. If empty, the selector returns StructuredData

columnSelectorFactory - factory for underlying selectors, if needed

readableOffset - offset for the selector, if available