Do not crash on null plugin IDs and icons paths and improve logging

Issue-Ref: 3939
Issue-Url: https://af3-developer.fortiss.org/issues/3939Signed-off-by: Simon Barner <barner@fortiss.org>

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/.ratings

@@ -8,7 +8,7 @@ FXEditorBase.java 40caf638c7b4c02da5aece0d9d58883bce630e76 GREEN
 IListPropertySection.java 8bb00fe7959583e794ff9437b7a77404c9a9e70f GREEN
 LWFXEFEditorBase.java f6b160b700a0287021402b5702beb2bfdce3dc2e GREEN
 ModelEditorBindingBase.java b9b1a1c5a48a6e677d1f57ad55a6126d9703c4b5 GREEN
-ModelElementHandlerBase.java d97a0762c39792721b7002fd2d7fb2f06bcecdcd YELLOW
+ModelElementHandlerBase.java 5352e6f3e62430bbfabaf4a82b450ca58db1786e YELLOW
 MultiEObjectActionBase.java 9e237d8ea640c4194e4877af4a9cfce88698e543 GREEN
 NamedCommentedModelElementHandlerBase.java 681b98b50b362f01abb7a36f108f4f11b9e51829 GREEN
 PropertySectionBase.java 20fb1daea544123ea941743aafeb9ac59daf5356 GREEN

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/ModelElementHandlerBase.java

@@ -18,6 +18,7 @@ package org.fortiss.tooling.kernel.ui.extension.base;
 import static java.util.Collections.emptyList;
 import static org.eclipse.jface.resource.ResourceLocator.imageDescriptorFromBundle;
 import static org.fortiss.tooling.common.ui.javafx.util.GraphicUtils.getFXImageFromURI;
+import static org.fortiss.tooling.kernel.utils.LoggingUtils.warning;
 import static org.fortiss.tooling.kernel.utils.ResourceUtils.getResourceURI;
 
 import java.util.HashMap;
@@ -29,6 +30,7 @@ import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.viewers.DecorationOverlayIcon;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Point;
+import org.fortiss.tooling.kernel.ui.ToolingKernelUIActivator;
 import org.fortiss.tooling.kernel.ui.extension.IModelElementHandler;
 
 import javafx.scene.Node;
@@ -67,7 +69,19 @@ public abstract class ModelElementHandlerBase<T extends EObject>
 	/** The default implementation forwards the request by ignoring the model element. */
 	@Override
 	public ImageDescriptor getIconImageDescriptor(T element) {
-		return imageDescriptorFromBundle(getPluginId(), getIconPath(element)).orElse(null);
+		String pluginId = getPluginId();
+		String iconPath = getIconPath(element);
+		if(pluginId == null || iconPath == null) {
+			String elementTypeName =
+					element != null ? element.getClass().getCanonicalName() : "<null>";
+			String pluginIdName = pluginId != null ? pluginId : "<null>";
+			String iconPathName = iconPath != null ? iconPath : "<null>";
+			warning(ToolingKernelUIActivator.getDefault(),
+					"Failed to load icon for " + elementTypeName + ". Plugin ID: " + pluginIdName +
+							", icon path: " + iconPathName);
+			return null;
+		}
+		return imageDescriptorFromBundle(pluginId, iconPath).orElse(null);
 	}
 
 	/** {@inheritDoc} */
@@ -99,8 +113,22 @@ public abstract class ModelElementHandlerBase<T extends EObject>
 	/** {@inheritDoc} */
 	@Override
 	public Node getFXIcon(T element) {
-		String uri = getResourceURI(getPluginId(), getIconPath(element));
+		String uri;
+		String pluginId = getPluginId();
+		String iconPath = getIconPath(element);
+		try {
+			uri = getResourceURI(pluginId, iconPath);
+		} catch(Exception e) {
+			uri = null;
+		}
 		if(uri == null) {
+			String elementTypeName =
+					element != null ? element.getClass().getCanonicalName() : "<null>";
+			String pluginIdName = pluginId != null ? pluginId : "<null>";
+			String iconPathName = iconPath != null ? iconPath : "<null>";
+			warning(ToolingKernelUIActivator.getDefault(),
+					"Failed to load FX icon for " + elementTypeName + ". Plugin ID: " +
+							pluginIdName + ", icon path: " + iconPathName);
 			return null;
 		}
 		javafx.scene.image.Image img = getFXImageFromURI(uri);