public void updateSource()

in taverna-dataflow-activity-ui/src/main/java/org/apache/taverna/workbench/file/importworkflow/gui/ImportWorkflowWizard.java [1097:1217]
120 lines of code
27 McCabe index (conditional complexity)

		public void updateSource() {
			ButtonModel selection = sourceSelection.getSelection();
			Workflow chosenDataflow = null;
			if (selection == null) {
				chosenDataflow = null;
			} else if (selection.equals(radioNew.getModel())) {
				WorkflowBundle workflowBundle = new WorkflowBundle();
				workflowBundle.setMainWorkflow(new Workflow());
				workflowBundle.getMainWorkflow().setName(fileManager.getDefaultWorkflowName());
				workflowBundle.setMainProfile(new Profile());
				scufl2Tools.setParents(workflowBundle);
				chosenDataflow = workflowBundle.getMainWorkflow();
			} else if (selection.equals(radioFile.getModel())) {
				final String filePath = fieldFile.getText();
				try {
					DataflowInfo opened = fileManager
							.openDataflowSilently(null, new File(filePath));
					if (checkInterrupted()) {
						return;
					}
					chosenDataflow = opened.getDataflow().getMainWorkflow();
				} catch (final OpenException e1) {
					if (!background && !shownWarning) {
						shownWarning = true;
						logger.warn("Could not open workflow for merging: " + filePath, e1);
						SwingUtilities.invokeLater(new Runnable() {
							public void run() {
								radioFile.requestFocus();
								JOptionPane.showMessageDialog(parentComponent,
										"An error occured while trying to open " + filePath + "\n"
												+ e1.getMessage(), "Could not open workflow",
										JOptionPane.WARNING_MESSAGE);
								setVisible(true);
							}
						});
					}
				}
			} else if (selection.equals(radioUrl.getModel())) {
				final String url = fieldUrl.getText();
				try {
					DataflowInfo opened = fileManager.openDataflowSilently(null, new URL(url));
					if (checkInterrupted()) {
						return;
					}
					chosenDataflow = opened.getDataflow().getMainWorkflow();
				} catch (final OpenException e1) {
					if (!background && !shownWarning) {
						logger.warn("Could not open source workflow: " + url, e1);
						shownWarning = true;
						SwingUtilities.invokeLater(new Runnable() {
							public void run() {
								fieldUrl.requestFocus();
								JOptionPane.showMessageDialog(
										parentComponent,
										"An error occured while trying to open " + url + "\n"
												+ e1.getMessage(), "Could not open workflow",
										JOptionPane.WARNING_MESSAGE);
								setVisible(true);
							}
						});

					}
					if (checkInterrupted()) {
						return;
					}
				} catch (final MalformedURLException e1) {
					if (!background && !shownWarning) {
						logger.warn("Invalid workflow URL: " + url, e1);
						shownWarning = true;
						SwingUtilities.invokeLater(new Runnable() {
							public void run() {
								fieldUrl.requestFocus();
								JOptionPane.showMessageDialog(
										parentComponent,
										"The workflow location " + url + " is invalid\n"
												+ e1.getLocalizedMessage(), "Invalid URL",
										JOptionPane.ERROR_MESSAGE);
								setVisible(true);
							}
						});
					}
					if (checkInterrupted()) {
						return;
					}
				}
			} else if (selection.equals(radioOpened.getModel())) {
				DataflowSelection chosen = (DataflowSelection) chooseDataflow.getSelectedItem();
				chosenDataflow = chosen.getDataflow().getMainWorkflow();
			} else if (selection.equals(radioCustomSource.getModel())) {
				chosenDataflow = customSourceDataFlow.getMainWorkflow();
			} else {
				logger.error("Unknown selection " + selection);
			}
			if (checkInterrupted()) {
				return;
			}
			if (chosenDataflow != ImportWorkflowWizard.this.sourceWorkflow) {
				Profile chosenProfile = null;
				if (chosenDataflow != null) {
					chosenProfile = chosenDataflow.getParent().getMainProfile();
				}
				updateWorkflowGraphic(previewSource, chosenDataflow, chosenProfile);
				if (checkInterrupted()) {
					return;
				}
				ImportWorkflowWizard.this.sourceWorkflow = chosenDataflow;
			}
			if (chosenDataflow == null) {
				if (!background && !shownWarning) {
					shownWarning = true;
					SwingUtilities.invokeLater(new Runnable() {
						public void run() {
							JOptionPane.showMessageDialog(parentComponent,
									"You need to choose a workflow for merging",
									"No workflow chosen", JOptionPane.ERROR_MESSAGE);
							setVisible(true);
						}
					});
				}
			}
		}