MonitorGraph (Apache Jena)

java.lang.Object
- org.apache.jena.graph.impl.WrappedGraph
- - org.apache.jena.util.MonitorGraph

All Implemented Interfaces:

Graph, GraphWithPerform
```
public class MonitorGraph
extends WrappedGraph
```
Graph wrapper which provides normal access to an underlying graph but also maintains a snapshot of the triples it was last known to contain. A snapshot action causes the set of changes between this and the previous snapshot to be calculated and the cache updated. The snapshot process will also fire change notification.

Field Summary
- Fields inherited from interface org.apache.jena.graph.Graph
  emptyGraph

Constructor Summary

Constructors
Constructor Description

MonitorGraph(Graph g)
Constructor, wrap the given graph with a state monitor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`snapshot(java.util.List<Triple> additions, java.util.List<Triple> deletions)`	Compute the differences between the current monitored graph and the last snapshot.

Methods inherited from class org.apache.jena.graph.impl.WrappedGraph
add, clear, close, contains, contains, delete, dependsOn, find, find, getCapabilities, getEventManager, getPrefixMapping, getTransactionHandler, getWrapped, isClosed, isEmpty, isIsomorphicWith, performAdd, performDelete, remove, size

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

Methods inherited from interface org.apache.jena.graph.Graph
add, delete, find, stream, stream

- Constructor Detail
  - MonitorGraph
```
public MonitorGraph(Graph g)
```
    Constructor, wrap the given graph with a state monitor
- Method Detail
  - snapshot
```
public void snapshot(java.util.List<Triple> additions,
                     java.util.List<Triple> deletions)
```
    Compute the differences between the current monitored graph and the last snapshot. The changes will also be forwarded to any listeners. Then take a new snapshot.
    
    Parameters:
    
    additions - a place in which the set of newly added triples should be noted, can be null
    
    deletions - a place in which the set of newly deleted triples should be noted, can be null