package org.simantics.modeling.ui.diagram.monitor;

import org.simantics.common.format.Formatter;
import org.simantics.databoard.Bindings;
import org.simantics.db.ReadGraph;
import org.simantics.db.common.utils.Logger;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.variable.Variable;
import org.simantics.db.layer0.variable.Variables;
import org.simantics.scl.runtime.function.FunctionImpl4;

public class DefaultFormattedVariableLabel extends FunctionImpl4 {

	@Override
	public Object apply(Object p0, Object p1, Object p2, Object p3) {
		
		try {

			ReadGraph graph = (ReadGraph)p0;
			Variable root = (Variable)p1;
			Formatter formatter = (Formatter)p2;
			String rvi = (String)p3;
			
			Variable var = root.browse(graph, rvi);
			
			Object value = var.getPossiblePropertyValue(graph, Variables.CONVERTED_VALUE, Bindings.STRING);
			if(value == null) {
				value = var.getValue(graph);
			}
			
			return formatter.format(value);
			
		} catch (DatabaseException e) {
			Logger.defaultLogError(e);
			return null;
		}
			
	}

}