RecordAggregator (OpenRefine 4.0-SNAPSHOT API)

All Superinterfaces:

Combiner<T>, Serializable

All Known Implementing Classes:

AllFacetsAggregator, ExpressionValueFacetAggregator, FacetAggregator, NumericFacetAggregator, RowInRecordAggregator, ScatterplotFacetAggregator, StringFacetAggregator, StringValuesFacetAggregator, TextSearchFacet.TextSearchAggregator, TimeRangeFacetAggregator
```
public interface RecordAggregator<T>
extends Combiner<T>
```
Computes a value of type T by aggregation over records in a grid. Most importantly this is used to compute facet statistics.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`T`	`withRecord(T state, Record record)`	Adds statistics obtained from a single record to the aggregation state.

Methods inherited from interface org.openrefine.browsing.facets.Combiner
sum

- Method Detail
  - withRecord
```
T withRecord(T state,
             Record record)
```
    Adds statistics obtained from a single record to the aggregation state. Given that states are expected to be immutable, this returns a new aggregation state object. This function is required to be associative with the combining function: combine(a, withRecord(b, record)) == withRecord(combine(a, b), record)
    
    Parameters:
    
    state - the current aggregation state
    
    record - the record to ingest
    
    Returns:
    
    the aggregation state updated with this row