io.druid.segment.virtual

Class SingleStringInputCachingExpressionColumnValueSelector

java.lang.Object

io.druid.segment.virtual.SingleStringInputCachingExpressionColumnValueSelector

All Implemented Interfaces:

HotLoopCallee, BaseDoubleColumnValueSelector, BaseFloatColumnValueSelector, BaseLongColumnValueSelector, BaseObjectColumnValueSelector<ExprEval>, ColumnValueSelector<ExprEval>

public class SingleStringInputCachingExpressionColumnValueSelector
extends Object
implements ColumnValueSelector<ExprEval>

Like ExpressionColumnValueSelector, but caches results for the first CACHE_SIZE dictionary IDs of a string column. Must only be used on selectors with dictionaries.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SingleStringInputCachingExpressionColumnValueSelector.LruEvalCache

Constructor Summary

Constructors

Constructor and Description
SingleStringInputCachingExpressionColumnValueSelector(DimensionSelector selector, Expr expression)

Method Summary

Modifier and Type	Method and Description
Class<ExprEval>	classOfObject()
double	getDouble()
float	getFloat()
long	getLong()
ExprEval	getObject()
void	inspectRuntimeShape(RuntimeShapeInspector inspector) Implementations of this method should call inspector.visit() with all fields of this class, which meet two conditions: 1.

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleStringInputCachingExpressionColumnValueSelector

public SingleStringInputCachingExpressionColumnValueSelector(DimensionSelector selector,
                                                             Expr expression)

Method Detail

inspectRuntimeShape

public void inspectRuntimeShape(RuntimeShapeInspector inspector)

Description copied from interface: HotLoopCallee

Implementations of this method should call inspector.visit() with all fields of this class, which meet two conditions: 1. They are used in methods of this class, annotated with CalledFromHotLoop 2. They are either: a. Nullable objects b. Instances of HotLoopCallee c. Objects, which don't always have a specific class in runtime. For example, a field of type Set could be HashSet or TreeSet in runtime, depending on how this instance (the instance on which inspectRuntimeShape() is called) is configured. d. ByteBuffer or similar objects, where byte order matters e. boolean flags, affecting branch taking f. Arrays of objects, meeting any of conditions a-e.

Specified by:

inspectRuntimeShape in interface HotLoopCallee

getDouble

public double getDouble()

Specified by:

getDouble in interface BaseDoubleColumnValueSelector

getFloat

public float getFloat()

Specified by:

getFloat in interface BaseFloatColumnValueSelector

getLong

public long getLong()

Specified by:

getLong in interface BaseLongColumnValueSelector

getObject

@Nullable
public ExprEval getObject()

Specified by:

getObject in interface BaseObjectColumnValueSelector<ExprEval>

classOfObject

public Class<ExprEval> classOfObject()

Specified by:

classOfObject in interface BaseObjectColumnValueSelector<ExprEval>