From d5552ceee2c98162b5f7fc6a349e2560ff7ef321 Mon Sep 17 00:00:00 2001
From: Tomasz Zarna
Date: Wed, 30 Oct 2013 12:10:25 +0100
Subject: 419190: ClassCastException when opening query dialog

Call methods on Wizard only if given IWizard is an instance of Wizard,
in other words check type before casting.

Bug: 419190
Change-Id: Ie462e542ecec0d443ab7865d9297e63fa4d9aa93
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=419190
---
 .../eclipse/mylyn/internal/tasks/ui/actions/AddRepositoryAction.java  | 4 +++-
 .../org/eclipse/mylyn/internal/tasks/ui/actions/NewQueryAction.java   | 4 +++-
 .../eclipse/mylyn/internal/tasks/ui/wizards/NewRepositoryWizard.java  | 4 +++-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/actions/AddRepositoryAction.java b/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/actions/AddRepositoryAction.java
index 92e313265..93326e676 100644
--- a/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/actions/AddRepositoryAction.java
+++ b/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/actions/AddRepositoryAction.java
@@ -106,7 +106,9 @@ public class AddRepositoryAction extends Action {
 			if (messageDialog.getReturnCode() == IDialogConstants.YES_ID) {
 				AbstractRepositoryConnectorUi connectorUi = TasksUiPlugin.getConnectorUi(taskRepository.getConnectorKind());
 				IWizard queryWizard = connectorUi.getQueryWizard(taskRepository, null);
-				((Wizard) queryWizard).setForcePreviousAndNextButtons(true);
+				if (queryWizard instanceof Wizard) {
+					((Wizard) queryWizard).setForcePreviousAndNextButtons(true);
+				}
 
 				WizardDialog queryDialog = new WizardDialog(shell, queryWizard);
 				queryDialog.create();
diff --git a/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/actions/NewQueryAction.java b/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/actions/NewQueryAction.java
index adf9faa3e..15d7f740c 100644
--- a/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/actions/NewQueryAction.java
+++ b/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/actions/NewQueryAction.java
@@ -77,7 +77,9 @@ public class NewQueryAction extends Action implements IViewActionDelegate, IExec
 			TaskRepository taskRepository = TasksUiUtil.getSelectedRepository();
 			AbstractRepositoryConnectorUi connectorUi = TasksUiPlugin.getConnectorUi(taskRepository.getConnectorKind());
 			wizard = connectorUi.getQueryWizard(taskRepository, null);
-			((Wizard) wizard).setForcePreviousAndNextButtons(true);
+			if (wizard instanceof Wizard) {
+				((Wizard) wizard).setForcePreviousAndNextButtons(true);
+			}
 			if (connectorUi instanceof LocalRepositoryConnectorUi) {
 				wizard.performFinish();
 				return;
diff --git a/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/wizards/NewRepositoryWizard.java b/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/wizards/NewRepositoryWizard.java
index d25488b18..2c446f24b 100644
--- a/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/wizards/NewRepositoryWizard.java
+++ b/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/internal/tasks/ui/wizards/NewRepositoryWizard.java
@@ -157,7 +157,9 @@ public class NewRepositoryWizard extends Wizard implements INewWizard {
 			if (messageDialog.getReturnCode() == IDialogConstants.YES_ID) {
 				AbstractRepositoryConnectorUi connectorUi = TasksUiPlugin.getConnectorUi(taskRepository.getConnectorKind());
 				final IWizard queryWizard = connectorUi.getQueryWizard(taskRepository, null);
-				((Wizard) queryWizard).setForcePreviousAndNextButtons(true);
+				if (queryWizard instanceof Wizard) {
+					((Wizard) queryWizard).setForcePreviousAndNextButtons(true);
+				}
 
 				// execute delayed to avoid stacking dialogs
 				getShell().getDisplay().asyncExec(new Runnable() {
-- 
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