org.apache.druid.segment

Interface BaseNullableColumnValueSelector

All Known Subinterfaces:

AggregateCombiner<T>, BaseDoubleColumnValueSelector, BaseFloatColumnValueSelector, BaseLongColumnValueSelector, ColumnValueSelector<T>, DimensionSelector, DoubleColumnSelector, FloatColumnSelector, HistoricalColumnSelector<T>, HistoricalDimensionSelector, LongColumnSelector, SettableColumnValueSelector<T>, SingleValueHistoricalDimensionSelector

All Known Implementing Classes:

AbstractDimensionSelector, BaseExpressionColumnValueSelector, BaseSingleValueDimensionSelector, ConstantDimensionSelector, ConstantExprEvalSelector, ConstantMultiValueDimensionSelector, DoubleAggregateCombiner, DoubleWrappingDimensionSelector, ExpressionColumnValueSelector, ExpressionMultiValueDimensionSelector, FloatWrappingDimensionSelector, HyperLogLogCollectorAggregateCombiner, IncrementalIndexRowHolder, IndexedTableColumnValueSelector, IndexedTableDimensionSelector, LongAggregateCombiner, LongSumAggregateCombiner, LongWrappingDimensionSelector, NestedFieldVirtualColumn.FieldDimensionSelector, NestedFieldVirtualColumn.RawFieldColumnSelector, NestedFieldVirtualColumn.RawFieldLiteralColumnValueSelector, NilColumnValueSelector, NullableNumericAggregateCombiner, ObjectAggregateCombiner, ObjectColumnSelector, PossiblyNullColumnValueSelector, PossiblyNullDimensionSelector, RowBasedExpressionColumnValueSelector, SettableDimensionValueSelector, SettableDoubleColumnValueSelector, SettableFloatColumnValueSelector, SettableLongColumnValueSelector, SettableObjectColumnValueSelector, SettableValueDoubleColumnValueSelector, SettableValueFloatColumnValueSelector, SettableValueLongColumnValueSelector, SingleLongInputCachingExpressionColumnValueSelector, SingleScanTimeDimensionSelector, SingleStringInputCachingExpressionColumnValueSelector, SingleStringInputDeferredEvaluationExpressionDimensionSelector, StringFirstAggregateCombiner, StringLastAggregateCombiner

public interface BaseNullableColumnValueSelector

Null value checking polymorphic "part" of the ColumnValueSelector interface for primitive values.

Method Summary

Modifier and Type	Method and Description
boolean	isNull() Returns true if the primitive long, double, or float value returned by this selector should be treated as null.

Method Detail

isNull

@CalledFromHotLoop
boolean isNull()

Returns true if the primitive long, double, or float value returned by this selector should be treated as null. Users of BaseLongColumnValueSelector.getLong(), BaseDoubleColumnValueSelector.getDouble() and BaseFloatColumnValueSelector.getFloat() must check this method first, or else they may improperly use placeholder values returned by the primitive get methods. Users of BaseObjectColumnValueSelector.getObject() should not call this method. Instead, call "getObject" and check if it is null.