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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.cayenne.graph;
/**
* 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
*/
public interface GraphChangeHandler {
/**
* Notifies implementing object that a node was assigned a new id.
*/
void nodeIdChanged(Object nodeId, Object newId);
/**
* Notifies implementing object that a new node was created in the graph.
*/
void nodeCreated(Object nodeId);
/**
* Notifies implementing object that a node was removed from the graph.
*/
void nodeRemoved(Object nodeId);
/**
* Notifies implementing object that a node's property was modified.
*/
void nodePropertyChanged(
Object nodeId,
String property,
Object oldValue,
Object newValue);
/**
* Notifies implementing object that a new arc was created between two nodes.
*/
void arcCreated(Object nodeId, Object targetNodeId, Object arcId);
/**
* Notifies implementing object that an arc between two nodes was deleted.
*/
void arcDeleted(Object nodeId, Object targetNodeId, Object arcId);
}