source: trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/commands/CMDshowMarkovModel.java @ 209

package de.ugoe.cs.eventbench.commands;

import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Shape;
import java.security.InvalidParameterException;
import java.util.List;

import javax.swing.JFrame;

import org.apache.commons.collections15.Transformer;

import de.ugoe.cs.eventbench.data.GlobalDataContainer;
import de.ugoe.cs.eventbench.models.FirstOrderMarkovModel;
import de.ugoe.cs.eventbench.models.FirstOrderMarkovModel.MarkovEdge;
import de.ugoe.cs.util.console.Command;
import de.ugoe.cs.util.console.Console;
import edu.uci.ics.jung.algorithms.layout.Layout;
import edu.uci.ics.jung.algorithms.layout.ISOMLayout;
import edu.uci.ics.jung.graph.Graph;
import edu.uci.ics.jung.visualization.BasicVisualizationServer;
import edu.uci.ics.jung.visualization.decorators.ToStringLabeller;
import edu.uci.ics.jung.visualization.renderers.Renderer.VertexLabel.Position;

/**
 * <p>
 * Command that visualizes first-order Markov models.
 * </p>
 * 
 * @author Steffen Herbold
 * @version 1.0
 */
public class CMDshowMarkovModel implements Command {

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.util.console.Command#help()
         */
        @Override
        public void help() {
                Console.println("Usage: showMarkovModel <modelName> {<showNodeNames>}");
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.util.console.Command#run(java.util.List)
         */
        @Override
        public void run(List<Object> parameters) {
                String modelname;
                boolean showNodeNames = false;
                try {
                        modelname = (String) parameters.get(0);
                        if (parameters.size() == 2) {
                                showNodeNames = Boolean
                                                .parseBoolean((String) parameters.get(1));
                        }
                } catch (Exception e) {
                        throw new InvalidParameterException();
                }

                Object dataObject = GlobalDataContainer.getInstance()
                                .getData(modelname);
                if (dataObject == null) {
                        Console.println("Object " + modelname + " not found in storage.");
                        return;
                }
                if (!(dataObject instanceof FirstOrderMarkovModel)) {
                        Console.println("Object " + modelname
                                        + "not of type FirstOrderMarkovModel.");
                        return;
                }
                FirstOrderMarkovModel mm = (FirstOrderMarkovModel) dataObject;

                Graph<String, MarkovEdge> graph = mm.getGraph();
                Layout<String, MarkovEdge> layout = new ISOMLayout<String, MarkovEdge>(
                                graph);
                layout.setSize(new Dimension(1000, 800)); // sets the initial size
                                                                                                        // of the space
                // The BasicVisualizationServer<V,E> is parameterized by the edge
                // types
                BasicVisualizationServer<String, MarkovEdge> vv = new BasicVisualizationServer<String, MarkovEdge>(
                                layout);
                vv.setPreferredSize(new Dimension(1100, 850)); // Sets the viewing
                                                                                                                // area size

                if (showNodeNames) {
                        final Rectangle rect = new Rectangle(240, 20);

                        Transformer<String, Shape> vertexShapeTransformer = new Transformer<String, Shape>() {
                                public Shape transform(String s) {
                                        return rect;
                                }
                        };
                        vv.getRenderer().getVertexLabelRenderer()
                                        .setPosition(Position.CNTR);
                        vv.getRenderContext().setVertexShapeTransformer(
                                        vertexShapeTransformer);
                        vv.getRenderContext().setVertexLabelTransformer(
                                        new ToStringLabeller<String>());
                }

                vv.getRenderContext().setEdgeLabelTransformer(
                                new ToStringLabeller<MarkovEdge>());

                JFrame frame = new JFrame("Markov Model");
                frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                frame.getContentPane().add(vv);
                frame.pack();
                frame.setVisible(true);
        }
}