[235197][api] Unusable wizard after cancelling on first page

rse/plugins/org.eclipse.rse.ui/UI/org/eclipse/rse/ui/wizards/newconnection/RSEMainNewConnectionWizard.java

@@ -17,6 +17,7 @@
  * Martin Oberhuber (Wind River) - [175262] IHost.getSystemType() should return IRSESystemType
  * Martin Oberhuber (Wind River) - [177523] Unify singleton getter methods
  * Uwe Stieber (Wind River) - [189426] System File/Folder Dialogs - New Connection Not Added to Drop Down
+ * Martin Oberhuber (Wind River) - [235197][api] Unusable wizard after cancelling on first page
  *******************************************************************************/
 
 package org.eclipse.rse.ui.wizards.newconnection;
@@ -66,6 +67,7 @@ public class RSEMainNewConnectionWizard extends Wizard implements INewWizard, IS
 	// @see #setConnectionContext(IHost)
 	private IHost connectionContext;
 
+	private RSENewConnectionWizardRegistry wizardRegistry;
 	private IWizard selectedWizard;
 	private IRSESystemType selectedSystemType;
 	private boolean selectedWizardCanFinishEarly;
@@ -92,9 +94,10 @@ public class RSEMainNewConnectionWizard extends Wizard implements INewWizard, IS
 		if (settings.getSection(sectionName) == null) settings.addNewSection(sectionName);
 		setDialogSettings(settings.getSection(sectionName));
 
+		wizardRegistry = new RSENewConnectionWizardRegistry();
 		selectedContext = null;
 		selectedWizard = null;
-		mainPage = new RSENewConnectionWizardSelectionPage();
+		mainPage = new RSENewConnectionWizardSelectionPage(wizardRegistry);
 		initializedWizards.clear();
 		selectionChangedListener.clear();
 	}
@@ -286,7 +289,9 @@ public class RSEMainNewConnectionWizard extends Wizard implements INewWizard, IS
 		if (selectedWizard instanceof ISelectionChangedListener) removeSelectionChangedListener((ISelectionChangedListener)selectedWizard);
 
 		// Check if a wizard is registered for the selected system type
-		IRSENewConnectionWizardDescriptor descriptor = getSelection() != null ? RSENewConnectionWizardRegistry.getInstance().getWizardForSelection((IStructuredSelection)getSelection()) : null;
+		IRSENewConnectionWizardDescriptor descriptor = getSelection() != null ? 
+			wizardRegistry.getWizardForSelection((IStructuredSelection) getSelection())
+			: null;
 		if (descriptor != null) {
 			selectedWizard = descriptor.getWizard();
 			selectedWizardCanFinishEarly = descriptor.canFinishEarly();

rse/plugins/org.eclipse.rse.ui/UI/org/eclipse/rse/ui/wizards/newconnection/RSENewConnectionWizardRegistry.java

@@ -10,6 +10,7 @@
  * Javier Montalvo Orus (Symbian) - [174992] default wizard hides special ones
  * David McKnight (IBM) - [216252] MessageFormat.format -> NLS.bind
  * Martin Oberhuber (Wind River) - [235148] get rid of dead code for caching
+ * Martin Oberhuber (Wind River) - [235197][api] Unusable wizard after cancelling on first page
  *******************************************************************************/
 package org.eclipse.rse.ui.wizards.newconnection;
 
@@ -27,8 +28,14 @@ import org.eclipse.rse.ui.wizards.registries.RSEAbstractWizardRegistry;
 /**
  * RSE New connection wizard registry implementation.
  *
+ * Gives access to the new connection wizards contributed by users, by looking
+ * up and creating wizard instances based on search criteria like system type or
+ * wizard id. Clients should create a new wizard registry instance for each UI
+ * "session" using the registry. For instance, an invocation of the new
+ * connection wizard (which delegates to sub-wizards) should always create a new
+ * registry instance.
+ *
  * @noextend This class is not intended to be subclassed by clients.
- * @noinstantiate This class is not intended to be instantiated by clients.
  */
 public class RSENewConnectionWizardRegistry extends RSEAbstractWizardRegistry {
 
@@ -40,7 +47,16 @@ public class RSENewConnectionWizardRegistry extends RSEAbstractWizardRegistry {
 	}
 
 	/**
-	 * Return the parser instance.
+	 * Return the global new connection wizard registry instance. Note that
+	 * using a global registry is problematic because sub-wizard state (and thus
+	 * wizard instances) should not be re-used between separate invocations of a
+	 * wizard by the user.
+	 *
+	 * @deprecated Instantiate a wizard registry yourself using
+	 *             {@link #RSENewConnectionWizardRegistry()} in order to control
+	 *             the lifetime of your wizard registry. Lifetime should be
+	 *             limited to the time a wizard is active. Each new wizard
+	 *             invocation should create a new wizard registry.
 	 */
 	public static RSENewConnectionWizardRegistry getInstance() {
 		return LazyInstanceHolder.instance;
@@ -48,8 +64,10 @@ public class RSENewConnectionWizardRegistry extends RSEAbstractWizardRegistry {
 
 	/**
 	 * Constructor.
+	 *
+	 * @since org.eclipse.rse.ui 3.0
 	 */
-	protected RSENewConnectionWizardRegistry() {
+	public RSENewConnectionWizardRegistry() {
 		super();
 	}
 

rse/plugins/org.eclipse.rse.ui/UI/org/eclipse/rse/ui/wizards/newconnection/RSENewConnectionWizardSelectionPage.java

@@ -9,6 +9,7 @@
  * Uwe Stieber (Wind River) - initial API and implementation.
  * Martin Oberhuber (Wind River) - [186779] Fix IRSESystemType.getAdapter()
  * Uwe Stieber      (Wind River) - [209193] RSE new connection wizard shows empty categories if typing something into the filter
+ * Martin Oberhuber (Wind River) - [235197][api] Unusable wizard after cancelling on first page
  *******************************************************************************/
 
 package org.eclipse.rse.ui.wizards.newconnection;
@@ -73,6 +74,7 @@ public class RSENewConnectionWizardSelectionPage extends WizardPage {
 
 	private IRSESystemType[] restrictedSystemTypes;
 
+	private RSENewConnectionWizardRegistry wizardRegistry;
 	private FilteredTree filteredTree;
 	private PatternFilter filteredTreeFilter;
 	private ViewerFilter filteredTreeWizardStateFilter;
@@ -138,11 +140,24 @@ public class RSENewConnectionWizardSelectionPage extends WizardPage {
 
  	/**
 	 * Constructor.
+     * @since org.eclipse.rse.ui 3.0
 	 */
-	public RSENewConnectionWizardSelectionPage() {
+	public RSENewConnectionWizardSelectionPage(RSENewConnectionWizardRegistry wizardRegistry) {
 		super("RSENewConnectionWizardSelectionPage"); //$NON-NLS-1$
 		setTitle(getDefaultTitle());
 		setDescription(getDefaultDescription());
+		this.wizardRegistry = wizardRegistry;
+	}
+
+	/**
+	 * Constructor.
+	 *
+	 * @deprecated Use
+	 *             {@link #RSENewConnectionWizardSelectionPage(RSENewConnectionWizardRegistry)}
+	 *             to control the lifetime of the wizard registry
+	 */
+	public RSENewConnectionWizardSelectionPage() {
+		this(RSENewConnectionWizardRegistry.getInstance());
 	}
 
 	/**
@@ -235,7 +250,7 @@ public class RSENewConnectionWizardSelectionPage extends WizardPage {
 			}
 		});
 
-		filteredTreeDataManager = new RSENewConnectionWizardSelectionTreeDataManager();
+		filteredTreeDataManager = new RSENewConnectionWizardSelectionTreeDataManager(wizardRegistry);
 		treeViewer.setInput(filteredTreeDataManager);
 
 		// apply the standard dialog font
@@ -338,7 +353,7 @@ public class RSENewConnectionWizardSelectionPage extends WizardPage {
 				for (int i = 0; i < expandedCategories.length; i++) {
 					String categoryId = expandedCategories[i];
 					if (categoryId != null && !"".equals(categoryId.trim())) { //$NON-NLS-1$
-						IRSEWizardRegistryElement registryElement = RSENewConnectionWizardRegistry.getInstance().findElementById(categoryId);
+						IRSEWizardRegistryElement registryElement = wizardRegistry.findElementById(categoryId);
 						if (registryElement instanceof IRSEWizardCategory) {
 							RSEWizardSelectionTreeElement treeElement = filteredTreeDataManager.getTreeElementForCategory((IRSEWizardCategory)registryElement);
 							if (treeElement != null) expanded.add(treeElement);

rse/plugins/org.eclipse.rse.ui/UI/org/eclipse/rse/ui/wizards/newconnection/RSENewConnectionWizardSelectionTreeDataManager.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2007 Wind River Systems, Inc. and others.
+ * Copyright (c) 2007, 2008 Wind River Systems, Inc. and others.
  * 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
@@ -8,6 +8,7 @@
  * Contributors:
  * Uwe Stieber (Wind River) - initial API and implementation.
  * Martin Oberhuber (Wind River) - [177523] Unify singleton getter methods
+ * Martin Oberhuber (Wind River) - [235197][api] Unusable wizard after cancelling on first page
  *******************************************************************************/
 package org.eclipse.rse.ui.wizards.newconnection;
 
@@ -37,9 +38,21 @@ public class RSENewConnectionWizardSelectionTreeDataManager extends RSEAbstractW
 
 	/**
 	 * Constructor.
+     * @since org.eclipse.rse.ui 3.0
+	 */
+	public RSENewConnectionWizardSelectionTreeDataManager(RSENewConnectionWizardRegistry wizardRegistry) {
+		super(wizardRegistry);
+	}
+
+	/**
+	 * Constructor.
+	 *
+	 * @deprecated Use
+	 *             {@link #RSENewConnectionWizardSelectionTreeDataManager(RSENewConnectionWizardRegistry)}
+	 *             to control the lifetime of the wizard registry
 	 */
 	public RSENewConnectionWizardSelectionTreeDataManager() {
-		super();
+		this(RSENewConnectionWizardRegistry.getInstance());
 	}
 
 	/**
@@ -84,7 +97,7 @@ public class RSENewConnectionWizardSelectionTreeDataManager extends RSEAbstractW
 		for (int i = 0; i < systemTypes.length; i++) {
 			IRSESystemType systemType = systemTypes[i];
 			// for the system type, lookup the corresponding wizard descriptor
-			IRSENewConnectionWizardDescriptor descriptor = RSENewConnectionWizardRegistry.getInstance().getWizardForSystemType(systemType);
+			IRSENewConnectionWizardDescriptor descriptor = ((RSENewConnectionWizardRegistry)getWizardRegistry()).getWizardForSystemType(systemType);
 			if (descriptor == null) {
 				// a system type without even the default RSE new connection wizard associated
 				// is bad and should never happen. Drop a warning and skip the system type.
@@ -112,7 +125,7 @@ public class RSENewConnectionWizardSelectionTreeDataManager extends RSEAbstractW
 			}
 
 			// get the category. If failing, the wizard will end up as root element
-			IRSEWizardRegistryElement candidate = RSENewConnectionWizardRegistry.getInstance().findElementById(categoryId);
+			IRSEWizardRegistryElement candidate = getWizardRegistry().findElementById(categoryId);
 			if (!(candidate instanceof IRSEWizardCategory)) {
 				rootElement.add(wizardElement);
 				continue;
@@ -139,7 +152,7 @@ public class RSENewConnectionWizardSelectionTreeDataManager extends RSEAbstractW
 			}
 
 			while (parentCategoryId != null) {
-				candidate = RSENewConnectionWizardRegistry.getInstance().findElementById(parentCategoryId);
+				candidate = getWizardRegistry().findElementById(parentCategoryId);
 				if (!(candidate instanceof IRSEWizardCategory)) {
 					rootElement.add(categoryElement);
 					break;

rse/plugins/org.eclipse.rse.ui/UI/org/eclipse/rse/ui/wizards/registries/RSEAbstractWizardSelectionTreeDataManager.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2007 Wind River Systems, Inc. and others.
+ * Copyright (c) 2007, 2008 Wind River Systems, Inc. and others.
  * 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
@@ -7,6 +7,7 @@
  *
  * Contributors:
  * Uwe Stieber (Wind River) - initial API and implementation.
+ * Martin Oberhuber (Wind River) - [235197][api] Unusable wizard after cancelling on first page
  *******************************************************************************/
 package org.eclipse.rse.ui.wizards.registries;
 
@@ -19,17 +20,43 @@ import java.util.Set;
  */
 public abstract class RSEAbstractWizardSelectionTreeDataManager {
 	private final Set rootElement = new HashSet();
+	private RSEAbstractWizardRegistry wizardRegistry;
 
 	/**
 	 * Constructor.
+     * @since org.eclipse.rse.ui 3.0
 	 */
-	public RSEAbstractWizardSelectionTreeDataManager() {
+	public RSEAbstractWizardSelectionTreeDataManager(RSEAbstractWizardRegistry wizardRegistry) {
+		this.wizardRegistry = wizardRegistry;
 		rootElement.clear();
 
 		// start the initialization of the data tree.
 		initialize(rootElement);
 	}
 
+	/**
+	 * Constructor.
+	 * 
+	 * @deprecated Use
+	 *             {@link #RSEAbstractWizardSelectionTreeDataManager(RSEAbstractWizardRegistry)}
+	 *             to control the lifetime of the wizard registry
+	 */
+	public RSEAbstractWizardSelectionTreeDataManager() {
+		this(null);
+	}
+
+	/**
+	 * Returns the currently active wizard registry, which allows looking up
+	 * wizard instances by various search keys. The wizard registry is valid as
+	 * long as a particular wizard is open.
+	 *
+	 * @return the current wizard registry
+	 * @since org.eclipse.rse.ui 3.0
+	 */
+	protected RSEAbstractWizardRegistry getWizardRegistry() {
+		return wizardRegistry;
+	}
+
 	/**
 	 * Returns the children of this wizard selection tree element.
 	 *