Upcast object?

[Mathias Nilsson]

Hi!

I need help with the following. I have class that sits as a template for a connector.

 
public class Template{
   private Template parent;
   private List<Template> templates;
}
 

A template can have a parent and a list of childs. This builds some sort of a tree. Now I have a class that extends the Template to add support for
users etc. How can I get a root template and make it a superclass? I can't get this to work.

[Mathias Nilsson]

Ok I think I solved it

 
@Transactional
	public Chain startChain( Chain chain, Template template ){
		
		/**
		 * This should throw an exception
		 */
		if( ! template.isRoot() ) return null;
		
		chain.getConnectors().clear();
		
		Connector c = new Connector();
		c.setChain(chain);
		c.setUser( chain.getUser() );
		getConnector(template,c);
		chain.addConnector( c );
		chain = getConnectorDAO().save( chain );

		return chain;
	}
	
	
	@Transactional
	private void getConnector( Template template, Connector connector ){
		connector.setName( template.getName() );
		connector.setSortOrder( template.getSortOrder() );
		connector.setWorkingDays( template.getWorkingDays() );
		List<Template> templates = template.getTemplates();
		for( Template t : templates ){
			Connector c = new Connector();
			c.setName( t.getName() );
			c.setChain( connector.getChain() );
			connector.addTemplate( c );
			if(!t.getTemplates().isEmpty()){
				getConnector(t,c);
			}
		}
	}
 

[Steve Luke]

Can you be more descriptive of what you want? I don't quite understand the problem you are having. Perhaps if you show the code that you would like to run but doesn't work we can show how to make it work.

[Campbell Ritchie]

That looks too complicated for us beginners. Moving.