Bug 570811 - ClassCastException during
DebugUITools.findToggleLaunchForConfig in RCP debug implementation

Change-Id: I711b0f0dc769c1691b3fd7604bc639b175b4d326
diff --git a/org.eclipse.debug.ui/ui/org/eclipse/debug/ui/DebugUITools.java b/org.eclipse.debug.ui/ui/org/eclipse/debug/ui/DebugUITools.java
index f24c1c9..f5e1e6f 100644
--- a/org.eclipse.debug.ui/ui/org/eclipse/debug/ui/DebugUITools.java
+++ b/org.eclipse.debug.ui/ui/org/eclipse/debug/ui/DebugUITools.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2018 IBM Corporation and others.
+ * Copyright (c) 2000, 2021 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -28,6 +28,7 @@
 import org.eclipse.core.commands.operations.ObjectUndoContext;
 import org.eclipse.core.resources.IMarker;
 import org.eclipse.core.resources.IResource;
+import org.eclipse.core.runtime.Adapters;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.core.runtime.IConfigurationElement;
@@ -868,7 +869,7 @@
 								TreePath[] treePath = selection.getPaths();
 								if (treePath != null && treePath.length == 1) {
 									Object lastSegmentObj = treePath[0].getLastSegment();
-									IResource selectedResource = ((IAdaptable) lastSegmentObj).getAdapter(IResource.class);
+									IResource selectedResource = Adapters.adapt(lastSegmentObj, IResource.class);
 									if (selectedResource!= null && selectedResource.equals(configResource[0])) {
 										return isShiftTerminateLaunch(key);
 									}