ObjectVectorValueMatcher (druid-processing 28.0.1 API)

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 VectorObjectSelector selector

Constructor Summary

Constructors
Constructor Description

ObjectVectorValueMatcher(VectorObjectSelector selector)

Method Summary

All Methods Instance Methods Concrete Methods
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 Detail
  - selector
```
protected final VectorObjectSelector selector
```
- Constructor Detail
  - ObjectVectorValueMatcher
```
public ObjectVectorValueMatcher(VectorObjectSelector selector)
```
- Method Detail
  - 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