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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.cayenne.graph</a></div>
<h2 title="Interface GraphChangeHandler" class="title">Interface GraphChangeHandler</h2>
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<dt>All Known Subinterfaces:</dt>
<dd><code><a href="GraphManager.html" title="interface in org.apache.cayenne.graph">GraphManager</a></code></dd>
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<dd><code><a href="ChildDiffLoader.html" title="class in org.apache.cayenne.graph">ChildDiffLoader</a></code>, <code><a href="../DataChannelSyncCallbackAction.html" title="class in org.apache.cayenne">DataChannelSyncCallbackAction</a></code>, <code><a href="GraphMap.html" title="class in org.apache.cayenne.graph">GraphMap</a></code>, <code><a href="../access/NoSyncObjectStore.html" title="class in org.apache.cayenne.access">NoSyncObjectStore</a></code>, <code><a href="../access/ObjectStore.html" title="class in org.apache.cayenne.access">ObjectStore</a></code></dd>
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<pre>public interface <span class="typeNameLabel">GraphChangeHandler</span></pre>
<div class="block">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.</div>
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<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.2</dd>
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<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#arcCreated(java.lang.Object,java.lang.Object,org.apache.cayenne.graph.ArcId)">arcCreated</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;targetNodeId,
<a href="ArcId.html" title="class in org.apache.cayenne.graph">ArcId</a>&nbsp;arcId)</code></th>
<td class="colLast">
<div class="block">Notifies implementing object that a new arc was created between two nodes.</div>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#arcDeleted(java.lang.Object,java.lang.Object,org.apache.cayenne.graph.ArcId)">arcDeleted</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;targetNodeId,
<a href="ArcId.html" title="class in org.apache.cayenne.graph">ArcId</a>&nbsp;arcId)</code></th>
<td class="colLast">
<div class="block">Notifies implementing object that an arc between two nodes was deleted.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#nodeCreated(java.lang.Object)">nodeCreated</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId)</code></th>
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<div class="block">Notifies implementing object that a new node was created in the graph.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#nodeIdChanged(java.lang.Object,java.lang.Object)">nodeIdChanged</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;newId)</code></th>
<td class="colLast">
<div class="block">Notifies implementing object that a node was assigned a new id.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#nodePropertyChanged(java.lang.Object,java.lang.String,java.lang.Object,java.lang.Object)">nodePropertyChanged</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;property,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;oldValue,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;newValue)</code></th>
<td class="colLast">
<div class="block">Notifies implementing object that a node's property was modified.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#nodeRemoved(java.lang.Object)">nodeRemoved</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId)</code></th>
<td class="colLast">
<div class="block">Notifies implementing object that a node was removed from the graph.</div>
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<pre class="methodSignature">void&nbsp;nodeIdChanged&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;newId)</pre>
<div class="block">Notifies implementing object that a node was assigned a new id.</div>
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<pre class="methodSignature">void&nbsp;nodeCreated&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId)</pre>
<div class="block">Notifies implementing object that a new node was created in the graph.</div>
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<pre class="methodSignature">void&nbsp;nodeRemoved&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId)</pre>
<div class="block">Notifies implementing object that a node was removed from the graph.</div>
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<pre class="methodSignature">void&nbsp;nodePropertyChanged&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;property,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;oldValue,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;newValue)</pre>
<div class="block">Notifies implementing object that a node's property was modified.</div>
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<pre class="methodSignature">void&nbsp;arcCreated&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;targetNodeId,
<a href="ArcId.html" title="class in org.apache.cayenne.graph">ArcId</a>&nbsp;arcId)</pre>
<div class="block">Notifies implementing object that a new arc was created between two nodes.</div>
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<pre class="methodSignature">void&nbsp;arcDeleted&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;nodeId,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;targetNodeId,
<a href="ArcId.html" title="class in org.apache.cayenne.graph">ArcId</a>&nbsp;arcId)</pre>
<div class="block">Notifies implementing object that an arc between two nodes was deleted.</div>
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