org.apache.druid.segment.filter

Class JavaScriptFilter

java.lang.Object

org.apache.druid.segment.filter.JavaScriptFilter

All Implemented Interfaces:

Filter

public class JavaScriptFilter
extends Object
implements Filter

Constructor Summary

Constructors

Constructor and Description
JavaScriptFilter(String dimension, JavaScriptDimFilter.JavaScriptPredicateFactory predicate, FilterTuning filterTuning)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
BitmapColumnIndex	getBitmapColumnIndex(ColumnIndexSelector selector) Returns a BitmapColumnIndex if this filter supports using a bitmap index for filtering for the given input ColumnIndexSelector.
Set<String>	getRequiredColumns() Set of columns used by a filter.
int	hashCode()
ValueMatcher	makeMatcher(ColumnSelectorFactory factory) Get a ValueMatcher that applies this filter to row values.
boolean	supportsSelectivityEstimation(ColumnSelector columnSelector, ColumnIndexSelector indexSelector) Indicates whether this filter supports selectivity estimation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.query.filter.Filter

canVectorizeMatcher, estimateSelectivity, makeVectorMatcher, rewriteRequiredColumns, supportsRequiredColumnRewrite

Constructor Detail

JavaScriptFilter

public JavaScriptFilter(String dimension,
                        JavaScriptDimFilter.JavaScriptPredicateFactory predicate,
                        FilterTuning filterTuning)

Method Detail

getBitmapColumnIndex

@Nullable
public BitmapColumnIndex getBitmapColumnIndex(ColumnIndexSelector selector)

Description copied from interface: Filter

Returns a BitmapColumnIndex if this filter supports using a bitmap index for filtering for the given input ColumnIndexSelector. The BitmapColumnIndex can be used to compute into a bitmap indicating rows that match this filter result BitmapColumnIndex.computeBitmapResult(BitmapResultFactory), or examine details about the index prior to computing it, via BitmapColumnIndex.getIndexCapabilities().

Specified by:

getBitmapColumnIndex in interface Filter

Parameters:

selector - Object used to create BitmapColumnIndex

Returns:

BitmapColumnIndex that can build ImmutableBitmap of matched row numbers

makeMatcher

public ValueMatcher makeMatcher(ColumnSelectorFactory factory)

Description copied from interface: Filter

Get a ValueMatcher that applies this filter to row values.

Specified by:

makeMatcher in interface Filter

Parameters:

factory - Object used to create ValueMatchers

Returns:

ValueMatcher that applies this filter to row values.

supportsSelectivityEstimation

public boolean supportsSelectivityEstimation(ColumnSelector columnSelector,
                                             ColumnIndexSelector indexSelector)

Description copied from interface: Filter

Indicates whether this filter supports selectivity estimation. A filter supports selectivity estimation if it supports bitmap index and the dimension which the filter evaluates does not have multi values.

Specified by:

supportsSelectivityEstimation in interface Filter

Parameters:

columnSelector - Object to check the dimension has multi values.

indexSelector - Object used to retrieve bitmap indexes

Returns:

true if this Filter supports selectivity estimation, false otherwise.

getRequiredColumns

public Set<String> getRequiredColumns()

Description copied from interface: Filter

Set of columns used by a filter.

Specified by:

getRequiredColumns in interface Filter

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object