org.apache.druid.segment.vector

Interface ReadableVectorInspector

All Superinterfaces:

VectorSizeInspector

All Known Subinterfaces:

ReadableVectorOffset, VectorOffset

All Known Implementing Classes:

BitmapVectorOffset, FilteredVectorOffset, NoFilterVectorOffset

public interface ReadableVectorInspector
extends VectorSizeInspector

Vector inspector that can supply a unique identifier of the vector to use with caching in addition to sizing information

Field Summary

Fields

Modifier and Type	Field and Description
static int	NULL_ID A marker value that will never be returned by "getId".

Method Summary

Modifier and Type	Method and Description
int	getId() Returns an integer that uniquely identifies the current vector.

Methods inherited from interface org.apache.druid.segment.vector.VectorSizeInspector

getCurrentVectorSize, getMaxVectorSize

Field Detail

NULL_ID

static final int NULL_ID

A marker value that will never be returned by "getId".

See Also:

Constant Field Values

Method Detail

getId

int getId()

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.