GraphVisitor (OpenJPA Parent POM 4.0.0 API)

```
public interface GraphVisitor
```
A helper interface that allows third parties to be notified of graph events during graph traversals

Since:

1.0.0

Author:

Steve Kim

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`edgeVisited(Edge edge)`	may visit the node twice (both sides)
`void`	`nodeSeen(java.lang.Object node)`	May not be called.
`void`	`nodeVisited(java.lang.Object node)`	will only be called once per node

- Method Detail
  - nodeSeen
```
void nodeSeen(java.lang.Object node)
```
    May not be called. The meaning of this method is dependent on the traversal being used. See each appropriate graph walker for details.
  - nodeVisited
```
void nodeVisited(java.lang.Object node)
```
    will only be called once per node
  - edgeVisited
```
void edgeVisited(Edge edge)
```
    may visit the node twice (both sides)