Error Handling

OurApplication/OurAlgorithm.java

@@ -4,6 +4,7 @@ import graph.*;
 import logging.Algorithm;
 import logging.LogElementList;
 
+import javax.swing.*;
 import java.util.Objects;
 
 
@@ -46,28 +47,47 @@ public class OurAlgorithm extends Algorithm {
 	 */
 	public LogElementList<OurLogElement> run() {
 
-		this.setCurrentGraph(((OurParameterArea) this.getParameterArea()).getSelectedGraph());
+		try{
+			this.setCurrentGraph(((OurParameterArea) this.getParameterArea()).getSelectedGraph());
 
-		MarkedVertex<VertexMarking> start = null;
-		for (MarkedVertex<VertexMarking> i : this.currentGraph.getAllVertexes()) {
-			if (Objects.equals(i.getName(), "Start")) {
-				start = i;
+			MarkedVertex<VertexMarking> start = null;
+			for (MarkedVertex<VertexMarking> i : this.currentGraph.getAllVertexes()) {
+				if (Objects.equals(i.getName(), "Start")) {
+					start = i;
+				}
 			}
-		}
 
-		MarkedVertex<VertexMarking> end = null;
-		for (MarkedVertex<VertexMarking> i : this.currentGraph.getAllVertexes()) {
-			if (Objects.equals(i.getName(), "Ende")) {
-				end = i;
+			MarkedVertex<VertexMarking> end = null;
+			for (MarkedVertex<VertexMarking> i : this.currentGraph.getAllVertexes()) {
+				if (Objects.equals(i.getName(), "Ende")) {
+					end = i;
+				}
 			}
-		}
 
-		if (this.methodButtons.getSelectedMethod()) {
-			this.currentGraph.getShortestPathDijkstra(start, end);
-		} else {
-			this.currentGraph.getShortestPathAStar(start, end);
+			if (this.methodButtons.getSelectedMethod()) {
+				this.currentGraph.getShortestPathDijkstra(start, end);
+			} else {
+				this.currentGraph.getShortestPathAStar(start, end);
+			}
+		//Fehlerbehandlung
+		}catch(Throwable e){
+			JFrame info = new JFrame();
+			JPanel contentpane = new JPanel();
+			info.setContentPane(contentpane);
+			JOptionPane.showMessageDialog(
+					contentpane,
+					"Bitte geben SIe einen gültige Graphen an. Hilfestellung für das Erstellen von Knoten und Kanten:\n" +
+							"Knoten: Name;X-Coordinate;Y-Coordinate\nKanten: StartKnoten;Endknoten;Gewichtung\n" +
+							"Hinweis: ein Koten benötigt den Namen 'Startknoten', ein anderer 'Endknoten'\n" +
+							"(Festlegen der Start und Endknoten für die Algorithmen)",
+					"Eingabefehler",
+					JOptionPane.INFORMATION_MESSAGE,
+					null
+			);
+			LogElementList<OurLogElement> emptyLogList = new LogElementList<>();
+				emptyLogList.add(new OurLogElement());
+			return emptyLogList;
 		}
-
 		return this.currentGraph.getLogList();
 	}
 

OurApplication/OurDrawArea.java

@@ -47,14 +47,16 @@ public class OurDrawArea extends DrawArea {
 		// Get the current log element from the log list
 		OurLogElement logElement = (OurLogElement) logList.get();
 
-		// Draw the graph associated with the log element
-		logElement.getGraph().draw(g);
+		// Draw the graph associated with the log element, if available
+		if (logElement.getGraph() != null) {
+			logElement.getGraph().draw(g);
 
-		// Draw markings on edges
-		for (Edge screenEdge : logElement.getGraph().getEdges()) {
-			g.drawString(screenEdge.getMarking(),
-					(screenEdge.getSource().getXpos() + screenEdge.getDestination().getXpos()) / 2,
-					(screenEdge.getSource().getYpos() + screenEdge.getDestination().getYpos()) / 2);
+			// Draw markings on edges
+			for (Edge screenEdge : logElement.getGraph().getEdges()) {
+				g.drawString(screenEdge.getMarking(),
+						(screenEdge.getSource().getXpos() + screenEdge.getDestination().getXpos()) / 2,
+						(screenEdge.getSource().getYpos() + screenEdge.getDestination().getYpos()) / 2);
+			}
 		}
 	}
 

OurApplication/OurParameterArea.java

@@ -66,7 +66,7 @@ public class OurParameterArea extends ParameterArea {
 
 		// Input text fields
 		textField1 = new JTextField("A-100-100;Ende-200-200;Start-100-200;D-200-100");
-		textField2 = new JTextField("A-Ende-15;Start-D-10;D-A-3;A-Ende-15;Start-D-10;D-A-3");
+		textField2 = new JTextField("A-Ende-15;Start-D-10;D-A-3");
 		textField1.setPreferredSize(new Dimension(button5.getWidth(), button5.getHeight()));
 		textField2.setPreferredSize(new Dimension(button5.getWidth(), button5.getHeight()));
 
@@ -135,31 +135,49 @@ public class OurParameterArea extends ParameterArea {
 	public DirectedGraph<VertexMarking, EdgeMarking> createGraph(String vertices, String edges) {
 		DirectedGraph<VertexMarking, EdgeMarking> newGraph = new DirectedGraph<>();
 
-		String[] allVertices = vertices.split(";");
-		String[] allEdges = edges.split(";");
+		try{
+			String[] allVertices = vertices.split(";");
+			String[] allEdges = edges.split(";");
 
-		// Create vertices
-		for (String i: allVertices) {
-			String[] current = i.split("-");
-			newGraph.addVertex(new MarkedVertex<>(Integer.parseInt(current[1]), Integer.parseInt(current[2]), current[0], null, Color.BLACK));
-		}
-
-		// Create edges
-		MarkedVertex<VertexMarking> start = null;
-		MarkedVertex<VertexMarking> end = null;
-		for (String i: allEdges) {
-			String[] current = i.split("-");
-			for (MarkedVertex<VertexMarking> j: newGraph.getAllVertexes()) {
-				if (Objects.equals(j.getName(), current[0])) {
-					start = j;
-				}
-				if (Objects.equals(j.getName(), current[1])) {
-					end = j;
-				}
+			// Create vertices
+			for (String i: allVertices) {
+				String[] current = i.split("-");
+				newGraph.addVertex(new MarkedVertex<>(Integer.parseInt(current[1]), Integer.parseInt(current[2]), current[0], null, Color.BLACK));
 			}
-			newGraph.addEdge(new MarkedEdge<>(i, start, end, new EdgeWeightMarking(Integer.parseInt(current[2]))));
+
+			// Create edges
+			MarkedVertex<VertexMarking> start = null;
+			MarkedVertex<VertexMarking> end = null;
+			for (String i: allEdges) {
+				String[] current = i.split("-");
+				for (MarkedVertex<VertexMarking> j: newGraph.getAllVertexes()) {
+					if (Objects.equals(j.getName(), current[0])) {
+						start = j;
+					}
+					if (Objects.equals(j.getName(), current[1])) {
+						end = j;
+					}
+				}
+				newGraph.addEdge(new MarkedEdge<>(i, start, end, new EdgeWeightMarking(Integer.parseInt(current[2]))));
+			}
+		//Fehlerbehandlung
+		}catch(Throwable e){
+			JFrame info = new JFrame();
+			JPanel contentpane = new JPanel();
+			info.setContentPane(contentpane);
+			JOptionPane.showMessageDialog(
+					contentpane,
+					"Fehler bei der Eingabe des Graphen. Beispieleingabe für Knoten und Kanten:\n" +
+							"Knoten: Name;X-Coordinate;Y-Coordinate\nKanten: StartKnoten;Endknoten;Gewichtung\n" +
+							"Hinweis: ein Koten benötigt den Namen 'Startknoten', ein anderer 'Endknoten'\n" +
+							"(Festlegen der Start und Endknoten für die Algorithmen)",
+					"Eingabefehler",
+					JOptionPane.INFORMATION_MESSAGE,
+					null
+			);
 		}
 
+
 		return newGraph;
 	}
 }