cant get a new attribute from a node

[yxj0312]

hi, i am doing a plugin with some new features.

First i try to add a new Attribute, which names "Controller"(booleantypen) to the nodes.
here is my code:

Code: Select all

AttributeColumn controllerCol = nodeTable.getColumn("Controller");
            if(controllerCol == null){
                
                nodeTable.addColumn("Controller",AttributeType.BOOLEAN);
                for(Node n : nodes) {
                    n.getNodeData().getAttributes().setValue("Controller", Boolean.TRUE);
                   
                    
                } 
                }  else {
                nodeTable.getColumn("Controller");
                for(Node n : nodes) {
                    n.getNodeData().getAttributes().setValue("Controller", Boolean.TRUE);
                } 

it runs well.

but when i try to find those "Controller" node in another project. it will always return NullPointerException.

Code: Select all

n.getNodeData().getAttributes().getValue("Controller").equals(Boolean.TRUE)

it seems my plugin cant find the new customed attribute from a node.

can somebody help me .

[eduramiba]

Hi,
You are probably some way not setting the "Controller" attribute for some of your nodes.
So these nodes will return null for the property.

This simple worked for me:

Code: Select all

        AttributeController ac = Lookup.getDefault().lookup(AttributeController.class);
        ac.getModel().getNodeTable().addColumn("Controller", AttributeType.BOOLEAN);
        
        for (Node node : graph.getNodes().toArray()) {
            node.getNodeData().getAttributes().setValue("Controller", Boolean.TRUE);
        }
        
        for (Node node : graph.getNodes().toArray()) {
            System.out.println(node.getNodeData().getAttributes().getValue("Controller").equals(Boolean.TRUE));
        }

Eduardo