Chief Delphi - network tables and arrays

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network tables and arrays

have a labview robot, want to write to it's network tables from a java app on driver station. That works great, but now I want to write an array of numbers.

If I write a array of numbers to the network table from labview, Java sees it as an Object[] containing Doubles. If I try to construct the same using

networkTable.putValue ("array", new Object[] { double1, double2 } );

I get an IllegalArgumentType: Invalid Type exception.

Is what I am attempting doable?

Re: network tables and arrays

Here's the method that's throwing the exception (from edu.wpi.first.wpilibj.networktables2.NetworkTableN ode):

Code:

        public void putValue(String name, Object value) throws IllegalArgumentException{

            if(value instanceof Double){

                    putValue(name, DefaultEntryTypes.DOUBLE, value);

            } else if (value instanceof String){

                    putValue(name, DefaultEntryTypes.STRING, value);

            } else if(value instanceof Boolean){

                    putValue(name, DefaultEntryTypes.BOOLEAN, value);

            } else if(value instanceof ComplexData){

                    putValue(name, ((ComplexData)value).getType(), value);

            } else if(value==null) {

                throw new NullPointerException("Cannot put a null value into networktables");

            } else {

                throw new IllegalArgumentException("Invalid Type");

            }

        }

NetworkTables can only contain Doubles, Strings, Booleans, and ComplexData. ComplexData is implemented by ArrayData, which is extended by BooleanArray, StringArray, and NumberArray. I think you want to use NumberArray, and as far as I can tell, you'd use it like this:

Code:

NumberArray outputArray = new NumberArray();

outputArray.add(double1);

outputArray.add(double2);

networkTable.putValue("array",outputArray);

Re: network tables and arrays

That worked. Thanks!