source: trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/commands/CMDshowTrie.java

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.CommandHelpers;
import de.ugoe.cs.eventbench.data.GlobalDataContainer;
import de.ugoe.cs.eventbench.models.Trie;
import de.ugoe.cs.eventbench.models.Trie.Edge;
import de.ugoe.cs.eventbench.models.Trie.TrieVertex;
import de.ugoe.cs.eventbench.models.TrieBasedModel;
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.TreeLayout;
import edu.uci.ics.jung.graph.Tree;
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 the {@link Trie} of a {@link TrieBasedModel}.
 * </p>
 * 
 * @author Steffen Herbold
 * @version 1.0
 */
public class CMDshowTrie implements Command {

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

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

                Object dataObject = GlobalDataContainer.getInstance()
                                .getData(modelname);
                if (dataObject == null) {
                        CommandHelpers.objectNotFoundMessage(modelname);
                        return;
                }
                if (!(dataObject instanceof TrieBasedModel)) {
                        CommandHelpers.objectNotType(modelname, "TrieBasedModel");
                }
                TrieBasedModel model = (TrieBasedModel) dataObject;
                Tree<TrieVertex, Edge> graph = model.getTrieGraph();
                Layout<TrieVertex, Edge> layout = new TreeLayout<TrieVertex, Edge>(
                                graph, 60);
                // The BasicVisualizationServer<V,E> is parameterized by the edge
                // types
                BasicVisualizationServer<TrieVertex, Edge> vv = new BasicVisualizationServer<TrieVertex, Edge>(
                                layout);
                vv.setPreferredSize(new Dimension(1100, 850)); // Sets the viewing
                                                                                                                // area size

                final Rectangle rect = new Rectangle(40, 20);

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

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

}