Package org.apache.druid.segment.virtual

Class ExpressionVectorObjectSelector

java.lang.Object

org.apache.druid.segment.virtual.ExpressionVectorObjectSelector

All Implemented Interfaces:

VectorObjectSelector, VectorSizeInspector

public class ExpressionVectorObjectSelector
extends Object
implements VectorObjectSelector

Constructor Summary

Constructors

Constructor	Description
ExpressionVectorObjectSelector(ExprVectorProcessor<?> processor, Expr.VectorInputBinding bindings)

Method Summary

Modifier and Type	Method	Description
int	getCurrentVectorSize()	Returns the current vector size for this cursor.
int	getMaxVectorSize()	Returns the maximum vector size for this cursor.
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 Detail

ExpressionVectorObjectSelector

public ExpressionVectorObjectSelector(ExprVectorProcessor<?> processor,
                                      Expr.VectorInputBinding bindings)

Method Detail

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

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