Aggregator (algo 2.3.8 API)

All Known Implementing Classes:

OneHopAggregator
```
public interface Aggregator
```

Field Summary

Fields
Modifier and Type Field Description

static Aggregator NO_AGGREGATION

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`double`	`apply(long sourceNode, long currentNode, double weightAtSource)`	aggregate weight between source and current node

- Field Detail
  - NO_AGGREGATION
```
static final Aggregator NO_AGGREGATION
```
- Method Detail
  - apply
```
double apply(long sourceNode,
             long currentNode,
             double weightAtSource)
```
    aggregate weight between source and current node
    
    Parameters:
    
    sourceNode - source node
    
    currentNode - the current node
    
    weightAtSource - the weight that has been aggregated for the currentNode so far
    
    Returns:
    
    new weight (e.g. weightAtSource + 1.)