Package org.apache.druid.segment.vector

Class FilteredVectorOffset

java.lang.Object

org.apache.druid.segment.vector.FilteredVectorOffset

All Implemented Interfaces:

ReadableVectorInspector, ReadableVectorOffset, VectorOffset, VectorSizeInspector

public class FilteredVectorOffset
extends Object
implements VectorOffset

Field Summary

Fields inherited from interface org.apache.druid.segment.vector.ReadableVectorInspector

NULL_ID

Method Summary

Modifier and Type	Method	Description
void	advance()	Advances by one batch.
static FilteredVectorOffset	create(VectorOffset baseOffset, VectorColumnSelectorFactory baseColumnSelectorFactory, Filter filter)
int	getCurrentVectorSize()	Returns the current vector size for this cursor.
int	getId()	Returns an integer that uniquely identifies the current vector.
int	getMaxVectorSize()	Returns the maximum vector size for this cursor.
int[]	getOffsets()	If "isContiguous" is false, this method returns a batch of offsets.
int	getStartOffset()	If "isContiguous" is true, this method returns the start offset of the range.
boolean	isContiguous()	Checks if the current batch is a contiguous range or not.
boolean	isDone()	Checks if iteration is "done", meaning the current batch of offsets is empty, and there are no more coming.
void	reset()	Resets the object back to its original state.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static FilteredVectorOffset create(VectorOffset baseOffset,
                                          VectorColumnSelectorFactory baseColumnSelectorFactory,
                                          Filter filter)

getId

public int getId()

Description copied from interface: ReadableVectorInspector

Returns an integer that uniquely identifies the current vector. This is useful for caching: it is safe to assume nothing has changed in the vector so long as the id remains the same.

Specified by:

getId in interface ReadableVectorInspector

advance

public void advance()

Description copied from interface: VectorOffset

Advances by one batch.

Specified by:

advance in interface VectorOffset

isDone

public boolean isDone()

Description copied from interface: VectorOffset

Checks if iteration is "done", meaning the current batch of offsets is empty, and there are no more coming.

Specified by:

isDone in interface VectorOffset

isContiguous

public boolean isContiguous()

Description copied from interface: ReadableVectorOffset

Checks if the current batch is a contiguous range or not. This is only good for one batch at a time, since the same object may return some contiguous batches and some non-contiguous batches. So, callers must check this method each time they want to retrieve the current batch of offsets.

Specified by:

isContiguous in interface ReadableVectorOffset

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

getStartOffset

public int getStartOffset()

Description copied from interface: ReadableVectorOffset

If "isContiguous" is true, this method returns the start offset of the range. The length of the range is given by "getCurrentVectorSize". Throws an exception if "isContiguous" is false.

Specified by:

getStartOffset in interface ReadableVectorOffset

getOffsets

public int[] getOffsets()

Description copied from interface: ReadableVectorOffset

If "isContiguous" is false, this method returns a batch of offsets. The array may be longer than the number of valid offsets, so callers need to check "getCurrentVectorSize" too. Throws an exception if "isContiguous" is true.

Specified by:

getOffsets in interface ReadableVectorOffset

reset

public void reset()

Description copied from interface: VectorOffset

Resets the object back to its original state. Once this is done, iteration can begin anew.

Specified by:

reset in interface VectorOffset