### Eclipse Workspace Patch 1.0
#P org.eclipse.jst.j2ee.ui
Index: j2ee_ui/org/eclipse/jst/j2ee/internal/actions/OpenJ2EEResourceAction.java
===================================================================
RCS file: /cvsroot/webtools/jeetools/plugins/org.eclipse.jst.j2ee.ui/j2ee_ui/org/eclipse/jst/j2ee/internal/actions/OpenJ2EEResourceAction.java,v
retrieving revision 1.33
diff -u -r1.33 OpenJ2EEResourceAction.java
--- j2ee_ui/org/eclipse/jst/j2ee/internal/actions/OpenJ2EEResourceAction.java	3 Mar 2008 16:23:29 -0000	1.33
+++ j2ee_ui/org/eclipse/jst/j2ee/internal/actions/OpenJ2EEResourceAction.java	17 Jun 2008 15:14:33 -0000
@@ -45,6 +45,9 @@
 import org.eclipse.jst.j2ee.webservice.wsdd.BeanLink;
 import org.eclipse.jst.j2ee.webservice.wsdd.EJBLink;
 import org.eclipse.jst.j2ee.webservice.wsdd.ServletLink;
+import org.eclipse.jst.javaee.application.Application;
+import org.eclipse.jst.javaee.applicationclient.ApplicationClient;
+import org.eclipse.jst.javaee.ejb.internal.impl.EJBJarImpl;
 import org.eclipse.ui.IEditorDescriptor;
 import org.eclipse.ui.IEditorPart;
 import org.eclipse.ui.IEditorRegistry;
@@ -231,8 +234,19 @@
 			IEditorRegistry registry = PlatformUI.getWorkbench().getEditorRegistry();
 			IFile file = WorkbenchResourceHelper.getFile((EObject)obj);
 			if(file != null) {
-				IContentType contentType = IDE.getContentType(file);
-				currentDescriptor = registry.getDefaultEditor(file.getName(), contentType);
+				/*[235218] if 'obj' is a JavaEE DD file it can only be opened if the file exists
+				 *	if 'obj' is not a DD file, the WorkbenchResourceHelper may still return the DD
+				 *	as the associated file (such as in the case with Beans), thus we must try to get
+				 *	the default editor if 'obj' is not a JavaEE DD file.
+				 */
+				boolean isJavaEEDDFile = isJavaEEDDFile((EObject)obj);
+				if((isJavaEEDDFile && file.exists()) || !isJavaEEDDFile){
+					IContentType contentType = IDE.getContentType(file);
+					currentDescriptor = registry.getDefaultEditor(file.getName(), contentType);
+				} else {
+					currentDescriptor = null;
+					return false;
+				}
 			} else {
 				if (((EObject)obj).eResource() != null) {
 					String name = (new Path(((EObject)obj).eResource().getURI().toString())).lastSegment();
@@ -315,4 +329,11 @@
 		}
 		return null;
 	}
+	
+	//[235218] Determine if the given EObject is a JavaEE DD
+	private boolean isJavaEEDDFile(EObject obj){
+		boolean isDD = obj instanceof EJBJarImpl || obj instanceof org.eclipse.jst.javaee.web.WebApp || 
+				obj instanceof Application || obj instanceof ApplicationClient;
+		return isDD;
+	}
 }