org.apache.druid.segment.nested

Class NestedDataComplexColumn

java.lang.Object

org.apache.druid.segment.nested.NestedDataComplexColumn

All Implemented Interfaces:

Closeable, AutoCloseable, BaseColumn, ComplexColumn

Direct Known Subclasses:

CompressedNestedDataComplexColumn

public abstract class NestedDataComplexColumn
extends Object
implements ComplexColumn

Describes the basic shape for any 'nested data' (StructuredData) ComplexColumn implementation along with basic facilities for caching any columns created and methods for retrieving selectors for nested literal field columns.

Constructor Summary

Constructors

Constructor and Description
NestedDataComplexColumn()

Method Summary

Modifier and Type	Method and Description
static NestedDataComplexColumn	fromColumnSelector(ColumnSelector columnSelector, String columnName)
Class<?>	getClazz()
abstract ColumnHolder	getColumnHolder(List<NestedPathPart> path)
abstract ColumnIndexSupplier	getColumnIndexSupplier(List<NestedPathPart> path) Make a ColumnIndexSupplier for a nested literal field column associated with this nested complex column located at the 'path' represented as a sequence of NestedPathPart.
abstract Set<ColumnType>	getColumnTypes(List<NestedPathPart> path)
abstract List<List<NestedPathPart>>	getNestedFields()
String	getTypeName()
abstract boolean	isNumeric(List<NestedPathPart> path)
abstract ColumnValueSelector<?>	makeColumnValueSelector(List<NestedPathPart> path, ReadableOffset readableOffset) Make a ColumnValueSelector for a nested literal field column associated with this nested complex column specified by a sequence of NestedPathPart.
abstract DimensionSelector	makeDimensionSelector(List<NestedPathPart> path, ReadableOffset readableOffset, ExtractionFn fn) Make a DimensionSelector for a nested literal field column associated with this nested complex column specified by a sequence of NestedPathPart.
abstract SingleValueDimensionVectorSelector	makeSingleValueDimensionVectorSelector(List<NestedPathPart> path, ReadableVectorOffset readableOffset) Make a SingleValueDimensionVectorSelector for a nested literal field column associated with this nested complex column specified by a sequence of NestedPathPart.
abstract VectorObjectSelector	makeVectorObjectSelector(List<NestedPathPart> path, ReadableVectorOffset readableOffset) Make a VectorObjectSelector for a nested literal field column associated with this nested complex column located at the 'path' represented as a sequence of NestedPathPart.
abstract VectorValueSelector	makeVectorValueSelector(List<NestedPathPart> path, ReadableVectorOffset readableOffset) Make a VectorValueSelector for a nested literal field column associated with this nested complex column located at the 'path' represented as a sequence of NestedPathPart.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.druid.segment.column.ComplexColumn

close, getLength, getRowValue, makeColumnValueSelector, makeVectorObjectSelector

Methods inherited from interface org.apache.druid.segment.column.BaseColumn

makeVectorValueSelector

Constructor Detail

NestedDataComplexColumn

public NestedDataComplexColumn()

Method Detail

fromColumnSelector

@Nullable
public static NestedDataComplexColumn fromColumnSelector(ColumnSelector columnSelector,
                                                                   String columnName)

makeDimensionSelector

public abstract DimensionSelector makeDimensionSelector(List<NestedPathPart> path,
                                                        ReadableOffset readableOffset,
                                                        ExtractionFn fn)

Make a DimensionSelector for a nested literal field column associated with this nested complex column specified by a sequence of NestedPathPart.

makeColumnValueSelector

public abstract ColumnValueSelector<?> makeColumnValueSelector(List<NestedPathPart> path,
                                                               ReadableOffset readableOffset)

Make a ColumnValueSelector for a nested literal field column associated with this nested complex column specified by a sequence of NestedPathPart.

makeSingleValueDimensionVectorSelector

public abstract SingleValueDimensionVectorSelector makeSingleValueDimensionVectorSelector(List<NestedPathPart> path,
                                                                                          ReadableVectorOffset readableOffset)

Make a SingleValueDimensionVectorSelector for a nested literal field column associated with this nested complex column specified by a sequence of NestedPathPart.

makeVectorObjectSelector

public abstract VectorObjectSelector makeVectorObjectSelector(List<NestedPathPart> path,
                                                              ReadableVectorOffset readableOffset)

Make a VectorObjectSelector for a nested literal field column associated with this nested complex column located at the 'path' represented as a sequence of NestedPathPart.

makeVectorValueSelector

public abstract VectorValueSelector makeVectorValueSelector(List<NestedPathPart> path,
                                                            ReadableVectorOffset readableOffset)

Make a VectorValueSelector for a nested literal field column associated with this nested complex column located at the 'path' represented as a sequence of NestedPathPart.

getNestedFields

public abstract List<List<NestedPathPart>> getNestedFields()

getColumnTypes

@Nullable
public abstract Set<ColumnType> getColumnTypes(List<NestedPathPart> path)

getColumnHolder

@Nullable
public abstract ColumnHolder getColumnHolder(List<NestedPathPart> path)

getColumnIndexSupplier

@Nullable
public abstract ColumnIndexSupplier getColumnIndexSupplier(List<NestedPathPart> path)

Make a ColumnIndexSupplier for a nested literal field column associated with this nested complex column located at the 'path' represented as a sequence of NestedPathPart.

isNumeric

public abstract boolean isNumeric(List<NestedPathPart> path)

getClazz

public Class<?> getClazz()

Specified by:

getClazz in interface ComplexColumn

Returns:

Class of objects returned on calls to ComplexColumn.getRowValue(int) .

getTypeName

public String getTypeName()

Specified by:

getTypeName in interface ComplexColumn

Returns:

Typename associated with this column.