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Cayenne Object Persistence Framework
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package org.apache.cayenne.graph;
import org.apache.cayenne.util.Util;
/**
* @since 1.2
* @author Andrus Adamchik
*/
public class NodePropertyChangeOperation extends NodeDiff {
protected String property;
protected Object oldValue;
protected Object newValue;
public NodePropertyChangeOperation(Object nodeId, String property, Object oldValue,
Object newValue) {
super(nodeId);
this.property = property;
this.oldValue = oldValue;
this.newValue = newValue;
}
public NodePropertyChangeOperation(Object nodeId, String property, Object oldValue,
Object newValue, int diffId) {
super(nodeId, diffId);
this.property = property;
this.oldValue = oldValue;
this.newValue = newValue;
}
/**
* Returns true if both old and new value are equal.
*/
public boolean isNoop() {
return Util.nullSafeEquals(oldValue, newValue);
}
public void apply(GraphChangeHandler tracker) {
tracker.nodePropertyChanged(nodeId, property, oldValue, newValue);
}
public void undo(GraphChangeHandler tracker) {
tracker.nodePropertyChanged(nodeId, property, newValue, oldValue);
}
}
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