Package org.apache.druid.segment.virtual

Class NestedFieldVirtualColumn.RawFieldVectorObjectSelector

java.lang.Object

org.apache.druid.segment.virtual.NestedFieldVirtualColumn.RawFieldVectorObjectSelector

All Implemented Interfaces:

VectorObjectSelector, VectorSizeInspector, VectorValueSelector

Enclosing class:

NestedFieldVirtualColumn

public static final class NestedFieldVirtualColumn.RawFieldVectorObjectSelector
extends Object
implements VectorObjectSelector, VectorValueSelector

Process the "raw" data to extract vectors of values with NestedPathFinder.find(Object, List), returning a value matching an expected type.

Constructor Summary

Constructors

Constructor	Description
RawFieldVectorObjectSelector(VectorObjectSelector baseSelector, List<NestedPathPart> parts, ColumnType expectedType)

Method Summary

Modifier and Type	Method	Description
int	getCurrentVectorSize()	Returns the current vector size for this cursor.
double[]	getDoubleVector()	Get the current vector, casting to doubles as necessary.
float[]	getFloatVector()	Get the current vector, casting to floats as necessary.
long[]	getLongVector()	Get the current vector, casting to longs as necessary.
int	getMaxVectorSize()	Returns the maximum vector size for this cursor.
boolean[]	getNullVector()	Gets a vector of booleans signifying which rows are null and which are not (true for null).
Object[]	getObjectVector()	Get the current vector.

Methods inherited from class java.lang.Object

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

Constructor Details

RawFieldVectorObjectSelector

public RawFieldVectorObjectSelector(VectorObjectSelector baseSelector,
 List<NestedPathPart> parts,
 @Nullable
 ColumnType expectedType)

Method Details

getObjectVector

public Object[] getObjectVector()

Description copied from interface: VectorObjectSelector

Get the current vector. The type of objects in the array depends on the type of the selector. Callers can determine this by calling VectorColumnSelectorFactory.getColumnCapabilities(String) if creating selectors directly. Alternatively, callers using VectorColumnProcessorFactory will receive capabilities as part of the callback to VectorColumnProcessorFactory.makeObjectProcessor(ColumnCapabilities, VectorObjectSelector). String selectors, where type is ColumnType.STRING, must use objects compatible with the spec of DimensionSelector.rowToObject(IndexedInts, DimensionDictionarySelector). Array selectors, where TypeSignature.isArray(), must use Object[]. The array may contain null elements, and the array itself may also be null. Complex selectors may use any type of object. No other type of selector is possible. Vector object selectors are only used for strings, arrays, and complex types.

Specified by:

getObjectVector in interface VectorObjectSelector

getLongVector

public long[] getLongVector()

Description copied from interface: VectorValueSelector

Get the current vector, casting to longs as necessary. The array will be reused, so it is not a good idea to retain a reference to it.

Specified by:

getLongVector in interface VectorValueSelector

getFloatVector

public float[] getFloatVector()

Description copied from interface: VectorValueSelector

Get the current vector, casting to floats as necessary. The array will be reused, so it is not a good idea to retain a reference to it.

Specified by:

getFloatVector in interface VectorValueSelector

getDoubleVector

public double[] getDoubleVector()

Description copied from interface: VectorValueSelector

Get the current vector, casting to doubles as necessary. The array will be reused, so it is not a good idea to retain a reference to it.

Specified by:

getDoubleVector in interface VectorValueSelector

getNullVector

public boolean[] getNullVector()

Description copied from interface: VectorValueSelector

Gets a vector of booleans signifying which rows are null and which are not (true for null). Returns null if it is known that there are no nulls in the vector, possibly because the column is non-nullable.

Specified by:

getNullVector in interface VectorValueSelector

getMaxVectorSize

public int getMaxVectorSize()

Description copied from interface: VectorSizeInspector

Returns the maximum vector size for this cursor. It will not change for the lifetime of this cursor, and is generally used to allocate scratch arrays for later processing. Will always be greater than zero.

Specified by:

getMaxVectorSize in interface VectorSizeInspector

getCurrentVectorSize

public int getCurrentVectorSize()

Description copied from interface: VectorSizeInspector

Returns the current vector size for this cursor. Will never be larger than the max size returned by VectorSizeInspector.getMaxVectorSize().

Specified by:

getCurrentVectorSize in interface VectorSizeInspector