@EverythingIsNonnullByDefault

Package org.apache.druid.segment

Interface Summary

Interface	Description
BaseDoubleColumnValueSelector	Double value selecting polymorphic "part" of the ColumnValueSelector interface.
BaseFloatColumnValueSelector	Float value selecting polymorphic "part" of the ColumnValueSelector interface.
BaseLongColumnValueSelector	Long value selecting polymorphic "part" of the ColumnValueSelector interface.
BaseNullableColumnValueSelector	Null value checking polymorphic "part" of the ColumnValueSelector interface for primitive values.
BaseObjectColumnValueSelector<T>	Object value selecting polymorphic "part" of the ColumnValueSelector interface.
ColumnSelector
ColumnSelectorFactory	Factory class for MetricSelectors
ColumnValueSelector<T>	Base type for interfaces that manage column value selection, e.g.
Cursor	Cursor is an interface for iteration over a range of data points, used during query execution.
CursorFactory
DimensionHandler<EncodedType extends Comparable<EncodedType>,EncodedKeyComponentType,ActualType extends Comparable<ActualType>>	Processing related interface A DimensionHandler is an object that encapsulates indexing, column merging/building, and querying operations for a given dimension type (e.g., dict-encoded String, Long).
DimensionIndexer<EncodedType extends Comparable<EncodedType>,EncodedKeyComponentType,ActualType extends Comparable<ActualType>>	Processing related interface A DimensionIndexer is a per-dimension stateful object that encapsulates type-specific operations and data structures used during the in-memory ingestion process (i.e., work done by IncrementalIndex).
DimensionMerger	Processing related interface A DimensionMerger is a per-dimension stateful object that encapsulates type-specific operations and data structures used during the segment merging process (i.e., work done by IndexMerger).
DimensionMergerV9	Processing related interface DimensionMerger subclass to be used with IndexMergerV9.
DimensionSelector
DoubleColumnSelector	This interface is convenient for implementation of "double-sourcing" ColumnValueSelectors, it provides default implementations for all ColumnValueSelector's methods except BaseDoubleColumnValueSelector.getDouble().
FloatColumnSelector	This interface is convenient for implementation of "float-sourcing" ColumnValueSelectors, it provides default implementations for all ColumnValueSelector's methods except BaseFloatColumnValueSelector.getFloat().
GenericColumnSerializer<T>	GenericColumnSerializer can be implemented in custom aggregator extensions that would like to take full control of column serialization.
IdLookup	"Mixin" for DimensionSelector.
IndexableAdapter	An adapter to an index
IndexMerger
IndexMerger.IndexSeeker
LongColumnSelector	This interface is convenient for implementation of "long-sourcing" ColumnValueSelectors, it provides default implementations for all ColumnValueSelector's methods except BaseLongColumnValueSelector.getLong().
ProgressIndicator
QueryableIndex	Direct interface to memory mapped segments.
RowIterator	Extension of TimeAndDimsIterator, specialized for RowPointer instead of TimeAndDimsPointer.
Segment	The difference between this class and DataSegment is that DataSegment contains the segment metadata only, while this class represents the actual body of segment data, queryable.
StorageAdapter
StringDimensionMergerV9.IndexSeeker
TimeAndDimsIterator	TimeAndDimsIterator (in conjunction with TimeAndDimsPointer) is an Iterator-like abstraction, designed for allocation-free transformation, merging, combining and iteration over a stream of data points.
TransformableRowIterator	TransformableRowIterator tightens RowIterator.getPointer() contract, that allows to transform iterated rows without allocations on each iterations, and reuse the mechanics of the underlying iterator.
VirtualColumn	Virtual columns are "views" created over a ColumnSelectorFactory.

Class Summary

Class	Description
AbstractDimensionSelector	An abstract class that provides an implementation of AbstractDimensionSelector.getObject().
AbstractIndex
AbstractSegment
BaseProgressIndicator
BaseSingleValueDimensionSelector
BitmapOffset
Capabilities
Capabilities.CapabilitiesBuilder
ColumnSelectorBitmapIndexSelector
CompressedPools
ConstantDimensionSelector
ConstantExprEvalSelector
DimensionHandlerUtils
DimensionSelector.NullDimensionSelectorHolder	This class not a public API.
DimensionSelectorUtils
DoubleColumnSerializer
DoubleColumnSerializerV2	Column Serializer for double column.
DoubleDimensionHandler
DoubleDimensionIndexer
DoubleDimensionMergerV9
DoubleWrappingDimensionSelector
FilteredOffset
FloatColumnSerializer
FloatColumnSerializerV2	Column Serializer for float column.
FloatDimensionHandler
FloatDimensionIndexer
FloatDimensionMergerV9
FloatWrappingDimensionSelector
ForwardingRowIterator	Implementation of TransformableRowIterator that just delegates all methods to some baseIterator (adapter pattern).
IncrementalIndexSegment
IndexIO
IndexIO.DefaultIndexIOHandler
IndexMerger.DictionaryMergeIterator
IndexMerger.IndexSeekerWithConversion	Get old dictId from new dictId, and only support access in order
IndexMergerV9
IndexSpec	IndexSpec defines segment storage format options to be used at indexing time, such as bitmap type, and column compression formats.
IntIteratorUtils
IntListUtils
LongColumnSerializer	Unsafe for concurrent use from multiple threads.
LongColumnSerializerV2	Column Serializer for long column.
LongDimensionHandler
LongDimensionIndexer
LongDimensionMergerV9
LongWrappingDimensionSelector
Metadata
MetricHolder
MMappedIndex
NilColumnValueSelector	Represents "absent" column.
NumericDimensionMergerV9	Common base of LongDimensionMergerV9, DoubleDimensionMergerV9 and FloatDimensionMergerV9.
ObjectColumnSelector<T>	This class is convenient for implementation of "object-sourcing" ColumnValueSelectors, it provides default implementations for all ColumnValueSelector's methods except BaseObjectColumnValueSelector.getObject() and BaseObjectColumnValueSelector.classOfObject().
QueryableIndexIndexableAdapter
QueryableIndexSegment
QueryableIndexStorageAdapter
QueryableIndexStorageAdapter.AscendingTimestampCheckingOffset
QueryableIndexStorageAdapter.DescendingTimestampCheckingOffset
QueryableIndexStorageAdapter.TimestampCheckingOffset
ReferenceCountingSegment	ReferenceCountingSegment allows to call ReferenceCountingSegment.close() before some other "users", which called ReferenceCountingSegment.increment(), has not called ReferenceCountingSegment.decrement() yet, and the wrapped Segment won't be actually closed until that.
RowFilteringIndexAdapter
RowNumCounter	Could be used as a simple "row number supplier" for RowPointer implementations.
RowPointer	Extension of TimeAndDimsPointer, that keeps "row number" of the current data point in some collection of data points, that actually makes this data point to be called "row", and the collection, thus, "collection of rows".
SimpleAscendingOffset
SimpleDescendingOffset
SimpleQueryableIndex
SingleScanTimeDimensionSelector	A special DimensionSelector for projected time columns - it assumes time values are scanned once and values are grouped together (i.e.
StringDimensionHandler
StringDimensionIndexer
StringDimensionMergerV9
StringDimensionMergerV9.ConvertingBitmapValues
StringDimensionMergerV9.IndexSeekerWithConversion	Get old dictId from new dictId, and only support access in order
StringDimensionMergerV9.IndexSeekerWithoutConversion
TimeAndDimsPointer	TimeAndDimsPointer is used in conjunction with TimeAndDimsIterator, it's an _immutable_ object that points to different logical data points, as TimeAndDimsIterator.moveToNext() is called.
VirtualColumns	Class allowing lookup and usage of virtual columns.

Enum Summary

Enum	Description
MetricHolder.MetricType

Exception Summary

Exception	Description
SegmentMissingException
SegmentValidationException