ExpressionCalculator (Solr 9.0.0 analytics API)

java.lang.Object
- org.apache.solr.analytics.function.ExpressionCalculator

```
public class ExpressionCalculator
extends Object
```
A class used to generate results for a list of AnalyticsExpressions.

Constructor Summary

Constructors
Constructor Description

ExpressionCalculator(Iterable<AnalyticsExpression> expressions)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addResults(Map<String,Object> response)`	Calculate results for the list of `AnalyticsExpression`s and add them to the given response.
`Map<String,Object>`	`getResults()`	Calculate results for the list of `AnalyticsExpression`s.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ExpressionCalculator
```
public ExpressionCalculator(Iterable<AnalyticsExpression> expressions)
```
- Method Detail
  - getResults
```
public Map<String,Object> getResults()
```
    Calculate results for the list of AnalyticsExpressions.
    NOTE: This method can, and is, called multiple times to generate different responses.
    The results are determined by which ReductionCollectionManager.ReductionDataCollection is passed to the ReductionCollectionManager.setData(org.apache.solr.analytics.function.ReductionCollectionManager.ReductionDataCollection) method of the ReductionCollectionManager managing the reduction for the list of AnalyticsExpressions.
    
    Returns:
    
    a NamedList containing the results
  - addResults
```
public void addResults(Map<String,Object> response)
```
    Calculate results for the list of AnalyticsExpressions and add them to the given response.
    NOTE: This method can, and is, called multiple times to generate different responses.
    The results are determined by which ReductionCollectionManager.ReductionDataCollection is passed to the ReductionCollectionManager.setData(org.apache.solr.analytics.function.ReductionCollectionManager.ReductionDataCollection) method of the ReductionCollectionManager managing the reduction for the list of AnalyticsExpressions.
    
    Parameters:
    
    response - the response to add the results map to.