ResultSetAccumulator

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface ResultSetAccumulator<T>
```
A ResultSetAccumulator repeatedly combines rows from the given ResultSet to produce a single result. jdbi will advance the ResultSet between each method invocation, so don't call ResultSet.next() please.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`T`	`apply(T previous, java.sql.ResultSet rs, StatementContext ctx)`	Extract a single row from the result set, and combine it with the accumulator to produce a result.

- Method Detail
  - apply
```
T apply(T previous,
        java.sql.ResultSet rs,
        StatementContext ctx)
 throws java.sql.SQLException
```
    Extract a single row from the result set, and combine it with the accumulator to produce a result.
    
    Parameters:
    
    previous - the previous object
    
    rs - the ResultSet, please do not advance it
    
    ctx - the statement context
    
    Returns:
    
    the accumulated value
    
    Throws:
    
    java.sql.SQLException - in the face of grave danger