Package org.apache.druid.query.filter.vector

Class ObjectVectorValueMatcher

java.lang.Object

org.apache.druid.query.filter.vector.ObjectVectorValueMatcher

All Implemented Interfaces:

VectorValueMatcherFactory

public class ObjectVectorValueMatcher
extends Object
implements VectorValueMatcherFactory

Generic object matcher on top of a VectorObjectSelector. String object selectors specifically should use StringObjectVectorValueMatcher instead. Note that this matcher currently will always behave as a nil matcher when used with a string matcher, since there is not enough machinery in place to allow custom comparison of string values against arbitrary array or complex types. In other words, how do we compare a string value from a selector filter against an array or a sketch? The short answer is we can't right now. Perhaps complex type serde could be extended to provide a string matcher to handle the complex type case? For array types, we might consider creating a different filter (which would also be an option for complex 'selectors'), or extending selector to support arrays of values.

Field Summary

Fields

Modifier and Type	Field	Description
protected final VectorObjectSelector	selector

Constructor Summary

Constructors

Constructor	Description
ObjectVectorValueMatcher(VectorObjectSelector selector)

Method Summary

Modifier and Type	Method	Description
VectorValueMatcher	makeMatcher(Object matchValue, ColumnType matchValueType)	Specialized value matcher for equality used by EqualityFilter.
VectorValueMatcher	makeMatcher(String value)	Specialized value matcher for string equality used by SelectorDimFilter
VectorValueMatcher	makeMatcher(DruidPredicateFactory predicateFactory)

Methods inherited from class java.lang.Object

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

Field Details

selector

protected final VectorObjectSelector selector

Constructor Details

ObjectVectorValueMatcher

public ObjectVectorValueMatcher(VectorObjectSelector selector)

Method Details

makeMatcher

public VectorValueMatcher makeMatcher(@Nullable
 String value)

Description copied from interface: VectorValueMatcherFactory

Specialized value matcher for string equality used by SelectorDimFilter

Specified by:

makeMatcher in interface VectorValueMatcherFactory

makeMatcher

public VectorValueMatcher makeMatcher(Object matchValue,
 ColumnType matchValueType)

Description copied from interface: VectorValueMatcherFactory

Specialized value matcher for equality used by EqualityFilter. The matchValue parameter must be the appropriate Java type for the matchValueType ColumnType. Implementors can use this information to coerce the match value to the native type of the values to match against as necessary.

Specified by:

makeMatcher in interface VectorValueMatcherFactory

makeMatcher

public VectorValueMatcher makeMatcher(DruidPredicateFactory predicateFactory)

Specified by:

makeMatcher in interface VectorValueMatcherFactory