org.apache.cayenne.graph
Interface GraphChangeHandler

All Known Subinterfaces:
GraphManager
All Known Implementing Classes:
ChildDiffLoader, GraphMap, ObjectStore

public interface GraphChangeHandler

Defines callback API that can be used by object graph nodes to notify of their state changes. Graph nodes can be any objects as long as each node supports a notion of a unique id within the graph and each directional arc has a unique identifier within its source node.

Since:
1.2

Method Summary
 void arcCreated(Object nodeId, Object targetNodeId, Object arcId)
          Notifies implementing object that a new arc was created between two nodes.
 void arcDeleted(Object nodeId, Object targetNodeId, Object arcId)
          Notifies implementing object that an arc between two nodes was deleted.
 void nodeCreated(Object nodeId)
          Notifies implementing object that a new node was created in the graph.
 void nodeIdChanged(Object nodeId, Object newId)
          Notifies implementing object that a node was assigned a new id.
 void nodePropertyChanged(Object nodeId, String property, Object oldValue, Object newValue)
          Notifies implementing object that a node's property was modified.
 void nodeRemoved(Object nodeId)
          Notifies implementing object that a node was removed from the graph.
 

Method Detail

nodeIdChanged

void nodeIdChanged(Object nodeId,
                   Object newId)
Notifies implementing object that a node was assigned a new id.


nodeCreated

void nodeCreated(Object nodeId)
Notifies implementing object that a new node was created in the graph.


nodeRemoved

void nodeRemoved(Object nodeId)
Notifies implementing object that a node was removed from the graph.


nodePropertyChanged

void nodePropertyChanged(Object nodeId,
                         String property,
                         Object oldValue,
                         Object newValue)
Notifies implementing object that a node's property was modified.


arcCreated

void arcCreated(Object nodeId,
                Object targetNodeId,
                Object arcId)
Notifies implementing object that a new arc was created between two nodes.


arcDeleted

void arcDeleted(Object nodeId,
                Object targetNodeId,
                Object arcId)
Notifies implementing object that an arc between two nodes was deleted.



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