The subject of properly handling cut, copy and paste is underdocumented in modern material on the NetBeans Platform and I am not aware of any clear and concise examples that show how to handle all aspects of these common actions. Anyone who can improve these shortcomings would be doing a great service for the NetBeans Platform developer community.

The Nodes API documentation provides some guidance, while chapter 14 of NetBeans: The Definitive Guide goes into greater detail. Although some parts of NetBeans: The Definitive Guide are now outdated, the portions related to the Nodes API are likely still relevant.