Java tutorial
/******************************************************************************* * Copyright (c) 2010 Freescale Semiconductor. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Serge Beauchamp (Freescale Semiconductor) - initial API and implementation *******************************************************************************/ package com.freescale.deadlockpreventer.agent; import java.io.File; import java.io.IOException; import java.net.URL; import java.util.ArrayList; import java.util.Enumeration; import java.util.Iterator; import java.util.regex.Pattern; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.FileLocator; import org.eclipse.core.runtime.IConfigurationElement; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Platform; import org.eclipse.core.runtime.Status; import org.eclipse.core.runtime.preferences.InstanceScope; import org.eclipse.jface.dialogs.IInputValidator; import org.eclipse.jface.dialogs.InputDialog; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.StyledText; import org.eclipse.swt.dnd.Clipboard; import org.eclipse.swt.dnd.TextTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.events.KeyAdapter; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Link; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.TabFolder; import org.eclipse.swt.widgets.TabItem; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.part.ViewPart; import org.eclipse.ui.progress.UIJob; import org.osgi.framework.Bundle; import com.freescale.deadlockpreventer.IConflictListener; import com.freescale.deadlockpreventer.NetworkServer; import com.freescale.deadlockpreventer.NetworkServer.Session; import com.freescale.deadlockpreventer.QueryService; import com.freescale.deadlockpreventer.ReportService; import com.freescale.deadlockpreventer.Settings; public class LauncherView extends ViewPart implements IAgent { private static final String CONTRIBUTOR_TAB_SELECTION = "contributor_tab_selection"; public static final String ID = "com.freescale.deadlockpreventer.agent.launcherView"; private TreeViewer viewer; private Button terminate; private Button throwsException; private Button interactive; private StyledText outputText; private ArrayList<InstrumentedProcess> processes = new ArrayList<InstrumentedProcess>(); private Button logAndContinue; private Button displayWarning; public String getPref(String key, String defaultValue) { return InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).get(key, defaultValue); } public String getViewID() { return ID; } public void setPref(String key, String value) { InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).put(key, value); } public void output(String string) { if (!outputText.isDisposed()) outputText.append(string); } public void resetOutput() { outputText.setText(""); processes.clear(); viewer.refresh(); } File deadlockPreventerJarPath = null; File javaassistJarPath = null; public IProcess createProcess(String label) { NetworkServer server = Activator.getDefault().getServer(); String reportKey = server.createNewSessionKey(ReportService.ID); final InstrumentedProcess process = new InstrumentedProcess(this, getUniqueLabel(label)); ReportService service = new ReportService() { public void handle(Session session) { super.handle(session); if (!processes.contains(process)) { processes.add(process); refreshViewerInMainThread(); } } }; service.setListener(process); server.registerSevice(reportKey, service); String queryKey = server.createNewSessionKey(QueryService.ID); process.setQueryService(new QueryService()); server.registerSevice(queryKey, process.getQueryService()); process.setReportKey(reportKey); process.setQueryKey(queryKey); return process; } protected void refreshViewerInMainThread() { UIJob job = new UIJob("") { public IStatus runInUIThread(IProgressMonitor monitor) { viewer.refresh(); return Status.OK_STATUS; } }; job.schedule(); } private String getUniqueLabel(String label) { String newLabel = label; int count = 1; while (!isProcessNameUnique(newLabel)) { newLabel = label + " (" + count++ + ")"; } return newLabel; } private boolean isProcessNameUnique(String newLabel) { for (InstrumentedProcess process : processes) { if (process.getLabel().equals(newLabel)) return false; } return true; } public String getVMArg(IProcess process, int vmArgAgent) { if (deadlockPreventerJarPath == null) { Bundle bundle = Platform.getBundle("com.freescale.deadlockpreventer.wrapper"); @SuppressWarnings("rawtypes") Enumeration e = bundle.findEntries("/", "com.freescale.deadlockpreventer.jar", false); if (!e.hasMoreElements()) return null; String installPath; try { installPath = FileLocator.toFileURL(((URL) e.nextElement())).getFile(); if (Platform.getOS().equals(Platform.OS_WIN32)) { if (installPath.startsWith("/")) installPath = installPath.substring(1); } deadlockPreventerJarPath = new File(installPath); } catch (IOException e1) { } } if (javaassistJarPath == null) { Bundle bundle = Platform.getBundle("javassist.wrapper"); @SuppressWarnings("rawtypes") Enumeration e = bundle.findEntries("/", "javassist.jar", false); if (!e.hasMoreElements()) return null; String installPath; try { installPath = FileLocator.toFileURL(((URL) e.nextElement())).getFile(); if (Platform.getOS().equals(Platform.OS_WIN32)) { if (installPath.startsWith("/")) installPath = installPath.substring(1); } javaassistJarPath = new File(installPath); } catch (IOException e1) { } } switch (vmArgAgent) { case VM_ADDITIONAL_ARGUMENTS: String exception = InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).get(PREF_EXCEPTION_THROWS, null); if (exception != null) return "-Dcom.freescale.deadlockpreventer.throwingClass=" + exception; return null; case VM_ARG_AGENT: return "-javaagent:\"" + deadlockPreventerJarPath.getAbsolutePath() + "\""; case VM_ARG_BOOT_CLASSPATH: return "-Xbootclasspath/a:\"" + deadlockPreventerJarPath.getAbsolutePath() + "\";\"" + javaassistJarPath.getAbsolutePath() + "\""; case VM_ARG_BOOT_SERVER_PORT: { NetworkServer server = Activator.getDefault().getServer(); InstrumentedProcess instrumentedProcess = (InstrumentedProcess) process; return "-D" + Settings.REPORT_SERVICE + "=localhost:" + server.getListeningPort() + ":" + instrumentedProcess.getReportKey() + " -D" + Settings.QUERY_SERVICE + "=localhost:" + server.getListeningPort() + ":" + instrumentedProcess.getQueryKey(); } } return null; } class ViewContentProvider implements IStructuredContentProvider, ITreeContentProvider { public void inputChanged(Viewer v, Object oldInput, Object newInput) { } public void dispose() { } public Object[] getElements(Object parent) { return getChildren(parent); } public Object getParent(Object child) { if (child instanceof Conflict) return ((Conflict) child).process; if (child instanceof InstrumentedProcess) return processes; return null; } public Object[] getChildren(Object parent) { if (parent instanceof InstrumentedProcess) return ((InstrumentedProcess) parent).getDisplayedConflicts(); if (parent instanceof ArrayList) return ((ArrayList<?>) parent).toArray(); return new Object[0]; } public boolean hasChildren(Object parent) { if (parent instanceof ArrayList) return ((ArrayList<?>) parent).size() > 0; if (parent instanceof InstrumentedProcess) return ((InstrumentedProcess) parent).getDisplayedConflicts().length > 0; return false; } } class ViewLabelProvider extends LabelProvider { public String getText(Object obj) { return obj.toString(); } public Image getImage(Object obj) { if (obj instanceof Conflict) { String imageKey = ((Conflict) obj).isError() ? ISharedImages.IMG_OBJS_ERROR_TSK : ISharedImages.IMG_OBJS_WARN_TSK; return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey); } if (obj instanceof InstrumentedProcess) return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJ_ELEMENT); return null; } } /** * This is a callback that will allow us to create the viewer and initialize * it. */ public void createPartControl(Composite parent) { Composite borderComposite = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(1, false); borderComposite.setLayout(layout); final TabFolder folder = new TabFolder(borderComposite, SWT.NONE); folder.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); IConfigurationElement[] config = Platform.getExtensionRegistry() .getConfigurationElementsFor("com.freescale.deadlockpreventer.agent.Configurator"); for (IConfigurationElement e : config) { try { Object o = e.createExecutableExtension("class"); if (o instanceof IConfigurator) { IConfigurator configurator = (IConfigurator) o; configurator.initialize(this); TabItem tab = new TabItem(folder, SWT.NONE); tab.setText(configurator.getName()); Composite tabComposite = new Composite(folder, SWT.NONE); configurator.createPartControl(tabComposite); tab.setControl(tabComposite); } } catch (CoreException e1) { e1.printStackTrace(); } } String selectedTab = getPref(CONTRIBUTOR_TAB_SELECTION, folder.getItem(0).getText()); TabItem[] items = folder.getItems(); for (int i = 0; i < items.length; i++) { if (items[i].getText().equals(selectedTab)) { folder.setSelection(i); break; } } folder.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { TabItem item = folder.getItem(folder.getSelectionIndex()); setPref(CONTRIBUTOR_TAB_SELECTION, item.getText()); } }); createSettingsPart(borderComposite); createResultPart(borderComposite); } private void createResultPart(Composite borderComposite) { TabFolder folder = new TabFolder(borderComposite, SWT.NONE); folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); TabItem conflictTab = new TabItem(folder, SWT.NONE); conflictTab.setText("Conflicts"); Composite conflicts = new Composite(folder, SWT.NONE); conflicts.setLayout(new GridLayout(3, false)); createConflictsPart(conflicts); conflictTab.setControl(conflicts); TabItem outputTab = new TabItem(folder, SWT.NONE); outputTab.setText("Output"); Composite output = new Composite(folder, SWT.NONE); output.setLayout(new GridLayout(1, false)); createOutputPart(output); outputTab.setControl(output); } private void createConflictsPart(Composite conflicts) { viewer = new TreeViewer(conflicts, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL); GridData layoutData = new GridData(SWT.FILL, SWT.FILL, true, true); layoutData.horizontalSpan = 3; viewer.getControl().setLayoutData(layoutData); viewer.setContentProvider(new ViewContentProvider()); viewer.setLabelProvider(new ViewLabelProvider()); viewer.getControl().setLayoutData(layoutData); viewer.addDoubleClickListener(new IDoubleClickListener() { @Override public void doubleClick(DoubleClickEvent event) { Object element = getSelection().getFirstElement(); if (element != null) { if (element instanceof Conflict) showInEditor((Conflict) element); if (element instanceof InstrumentedProcess) ((InstrumentedProcess) element).displayStatistics(); } } }); viewer.getControl().addKeyListener(new KeyAdapter() { @Override public void keyReleased(KeyEvent e) { if (e.keyCode == SWT.DEL) { Iterator<?> it = getSelection().iterator(); while (it.hasNext()) { Object obj = it.next(); if (obj instanceof Conflict) ((Conflict) obj).remove(); if (obj instanceof InstrumentedProcess) processes.remove(obj); } viewer.refresh(); } } }); final Menu menu = new Menu(conflicts.getShell(), SWT.POP_UP); viewer.getControl().setMenu(menu); MenuItem menuItem = new MenuItem(menu, SWT.PUSH); menuItem.setText("Statistics..."); menu.addListener(SWT.Show, new Listener() { public void handleEvent(Event event) { boolean isAProcess = selectionIsAProcess(); for (MenuItem item : menu.getItems()) item.setEnabled(isAProcess); } private boolean selectionIsAProcess() { Iterator<?> it = getSelection().iterator(); while (it.hasNext()) { Object obj = it.next(); if (!(obj instanceof InstrumentedProcess)) return false; } return true; } }); menuItem.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { displayStatistics(); } }); menuItem = new MenuItem(menu, SWT.PUSH); menuItem.setText("Download Global Lock State..."); menuItem.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { downloadGlobalLockState(); } }); displayWarning = new Button(conflicts, SWT.CHECK); displayWarning.setText("Display warnings"); displayWarning.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); displayWarning.setSelection(Boolean.parseBoolean(InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID) .get(PREF_DISPLAY_WARNINGS, Boolean.toString(false)))); displayWarning.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).put(PREF_DISPLAY_WARNINGS, Boolean.toString(displayWarning.getSelection())); viewer.refresh(); } }); Button editFilters = new Button(conflicts, SWT.PUSH); editFilters.setText("Filters..."); editFilters.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); editFilters.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { String filtersString = InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).get(PREF_DISPLAY_FILTERS, defaultFilters); InputDialog dlg = new InputDialog(getSite().getShell(), "Conflict filters", "Conflicts matching the following list of regular expressions separated by semi-colons (;) will not be displayed:", filtersString, new FilterValidator()); if (dlg.open() == Window.OK) InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).put(PREF_DISPLAY_FILTERS, dlg.getValue()); viewer.refresh(); } }); Button copyToClipBoard = new Button(conflicts, SWT.PUSH); copyToClipBoard.setText("Copy to clipboard"); copyToClipBoard.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false)); copyToClipBoard.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { StringBuffer buffer = new StringBuffer(); for (InstrumentedProcess process : processes) { Conflict[] conflicts = process.getDisplayedConflicts(); if (conflicts.length > 0) { for (Conflict conflict : conflicts) { buffer.append(conflict.message + "\n"); } } } Clipboard cb = new Clipboard(Display.getDefault()); TextTransfer textTransfer = TextTransfer.getInstance(); cb.setContents(new Object[] { buffer.toString() }, new Transfer[] { textTransfer }); } }); viewer.setInput(processes); } private IStructuredSelection getSelection() { IStructuredSelection selection = (IStructuredSelection) viewer.getSelection(); if (!selection.isEmpty()) { if (selection instanceof IStructuredSelection) return (IStructuredSelection) selection; } return new StructuredSelection(); } protected void displayStatistics() { Iterator<?> it = getSelection().iterator(); while (it.hasNext()) { Object obj = it.next(); if ((obj instanceof InstrumentedProcess)) ((InstrumentedProcess) obj).displayStatistics(); } } protected void downloadGlobalLockState() { Iterator<?> it = getSelection().iterator(); while (it.hasNext()) { Object obj = it.next(); if ((obj instanceof InstrumentedProcess)) ((InstrumentedProcess) obj).downloadGlobalLockState(); } } static class FilterValidator implements IInputValidator { @Override public String isValid(String newText) { try { String[] filters = newText.split(";"); Pattern[] patterns = new Pattern[filters.length]; for (int i = 0; i < filters.length; i++) { patterns[i] = Pattern.compile(filters[i]); } } catch (Exception e) { return e.toString(); } return null; } } protected void showInEditor(Conflict conflict) { ConflictDialog dialog = new ConflictDialog(getSite().getShell(), conflict); dialog.open(); } protected String defaultFilters = "org\\.eclipse\\.osgi\\..*;"; private Button printToStdout; private boolean passFilters(Conflict conflictItem) { String filtersString = InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).get(PREF_DISPLAY_FILTERS, defaultFilters); String[] filters = filtersString.split(";"); Pattern[] patterns = new Pattern[filters.length]; for (int i = 0; i < filters.length; i++) { patterns[i] = Pattern.compile(filters[i]); } boolean showWarning = displayWarning.getSelection(); if (!showWarning && !conflictItem.isError()) return false; for (Pattern pattern : patterns) { if (pattern.matcher(conflictItem.conflict).matches() || pattern.matcher(conflictItem.precedent).matches()) { return false; } } return true; } protected int handleConflict(Conflict conflictItem) { if (!passFilters(conflictItem)) return IConflictListener.CONTINUE; int flag = 0; if (Boolean.parseBoolean(InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).get(PREF_PRINT_TO_STDOUT, Boolean.toString(false)))) flag |= IConflictListener.LOG_TO_CONSOLE; if (logAndContinue.getSelection()) return flag | IConflictListener.CONTINUE; if (throwsException.getSelection()) return flag | IConflictListener.EXCEPTION; if (terminate.getSelection()) return flag | IConflictListener.ABORT; if (interactive.getSelection()) { final String conflictMessage = conflictItem.message; MessageDialog dialog = new MessageDialog(getSite().getShell(), "Deadlock confict occured", null, "An incorrect synchronization primitive acquisition order has occured.", MessageDialog.QUESTION, new String[] { "Continue", "Throw exception", "Terminate process" }, 0) { protected Control createCustomArea(Composite parent) { parent.setLayout(new GridLayout()); Text text = new Text(parent, SWT.READ_ONLY | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL); text.setText(conflictMessage); text.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_WHITE)); GridData layoutData = new GridData(SWT.FILL, SWT.FILL, true, true); text.setLayoutData(layoutData); return super.createCustomArea(parent); } protected Point getInitialSize() { Point pt = super.getInitialSize(); pt.x = Math.min(pt.x, 600); pt.y = Math.min(pt.y, 600); return pt; } }; int index = dialog.open(); if (index == 1) return flag | IConflictListener.EXCEPTION; if (index == 2) return flag | IConflictListener.ABORT; } return flag | IConflictListener.CONTINUE; } private void createOutputPart(Composite output) { outputText = new StyledText(output, SWT.READ_ONLY | SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL); outputText.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); } private void createSettingsPart(Composite parent) { Group group = new Group(parent, SWT.NONE); group.setText("Deadlock conflict handling"); GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, false); group.setLayoutData(gridData); GridLayout layout = new GridLayout(1, false); group.setLayout(layout); logAndContinue = new Button(group, SWT.RADIO); logAndContinue.setText("Log and continue"); gridData = new GridData(SWT.LEFT, SWT.CENTER, false, false); logAndContinue.setLayoutData(gridData); logAndContinue.setData(new Integer(1)); interactive = new Button(group, SWT.RADIO); interactive.setText("Interactive"); gridData = new GridData(SWT.LEFT, SWT.CENTER, false, false); interactive.setLayoutData(gridData); interactive.setData(new Integer(0)); Composite exceptionGroup = new Composite(group, SWT.NONE); gridData = new GridData(SWT.FILL, SWT.CENTER, true, false); gridData.verticalIndent = 0; gridData.verticalSpan = 0; gridData.horizontalAlignment = 0; gridData.horizontalIndent = 0; exceptionGroup.setLayoutData(gridData); layout = new GridLayout(2, false); layout.marginBottom = 0; layout.marginHeight = 0; layout.marginLeft = 0; layout.marginRight = 0; layout.marginTop = 0; layout.marginWidth = 0; layout.horizontalSpacing = 0; exceptionGroup.setLayout(layout); throwsException = new Button(exceptionGroup, SWT.RADIO); throwsException.setText("Throw"); gridData = new GridData(SWT.LEFT, SWT.CENTER, false, false); throwsException.setLayoutData(gridData); throwsException.setData(new Integer(2)); Link link = new Link(exceptionGroup, SWT.NONE); link.setText("<a>exception</a>"); link.addListener(SWT.Selection, new Listener() { public void handleEvent(Event event) { String exception = InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).get(PREF_EXCEPTION_THROWS, "com.freescale.deadlockpreventer.OrderingException"); InputDialog dlg = new InputDialog(getSite().getShell(), "Exception thrown", "The following exception will be thrown when a conflict is detected:", exception, new FilterValidator()); if (dlg.open() == Window.OK) InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).put(PREF_EXCEPTION_THROWS, dlg.getValue()); viewer.refresh(); } }); gridData = new GridData(SWT.LEFT, SWT.CENTER, false, false); link.setLayoutData(gridData); terminate = new Button(group, SWT.RADIO); terminate.setText("Terminate process"); gridData = new GridData(SWT.LEFT, SWT.CENTER, false, false); terminate.setLayoutData(gridData); terminate.setData(new Integer(3)); String defaultItem = InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).get(PREF_DEFAULT_HANDLING, Integer.toString(1)); Integer selectedItem = Integer.parseInt(defaultItem); final Button[] radios = { interactive, logAndContinue, throwsException, terminate }; for (int i = 0; i < radios.length; i++) { if (radios[i].getData().equals(selectedItem)) { radios[i].setSelection(true); } radios[i].addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { Integer index = (Integer) e.widget.getData(); InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).put(PREF_DEFAULT_HANDLING, index.toString()); if (e.widget == throwsException) { interactive.setSelection(false); logAndContinue.setSelection(false); terminate.setSelection(false); } else { if (throwsException.getSelection()) throwsException.setSelection(false); } } }); } printToStdout = new Button(group, SWT.CHECK); printToStdout.setText("Print to process standard out"); printToStdout.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); printToStdout.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).put(PREF_PRINT_TO_STDOUT, Boolean.toString(printToStdout.getSelection())); } }); printToStdout.setSelection(Boolean.parseBoolean(InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID) .get(PREF_PRINT_TO_STDOUT, Boolean.toString(false)))); } /** * Passing the focus request to the viewer's control. */ public void setFocus() { viewer.getControl().setFocus(); } public TreeViewer getViewer() { return viewer; } public void setViewer(TreeViewer viewer) { this.viewer = viewer; } public boolean shouldDisplayWarning() { return displayWarning.getSelection(); } public String getDefaultFilters() { return defaultFilters; } }