find platform resources for file URI

org.eclipse.emf.util/src/org/eclipse/emf/util/ResourceUtils.java

@@ -1,5 +1,9 @@
 package org.eclipse.emf.util;
 
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.emf.common.util.URI;
@@ -23,9 +27,38 @@ public static IResource convertEResourceToPlatformResource(Resource eResource) {
 	public static IResource findPlatformResource(URI uri) {
 		if (uri.isPlatformResource()) {
 			return ResourcesPlugin.getWorkspace().getRoot().findMember(uri.toPlatformString(true));
-		} else {
-			return null;
+		} else if (uri.isFile()) {
+			java.net.URI fileURI = java.net.URI.create(uri.toString());
+			List<IResource> candidates = findPlatformResources(fileURI);
+			if (!candidates.isEmpty()) {
+				return candidates.get(0);
+			}
 		}
+		return null;
 	}
 
-}
+	/**
+	 * returns a list of (existing) platform resource for the given file uri
+	 * 
+	 * returns an empty list if no such resource exists or if the given URI is not a
+	 * file uri
+	 */
+	public static List<IResource> findPlatformResources(java.net.URI fileURI) {
+		List<IResource> result = new ArrayList<>();
+		File file = new File(fileURI.getRawPath());// remove potential fragment
+		if (file.exists()) {
+			IResource[] candidates = null;
+			if (file.isDirectory()) {
+				candidates = ResourcesPlugin.getWorkspace().getRoot().findContainersForLocationURI(fileURI);
+			} else if (file.isFile()) {
+				candidates = ResourcesPlugin.getWorkspace().getRoot().findFilesForLocationURI(fileURI);
+			}
+			for (IResource candidate : candidates) {
+				if (candidate.exists()) {
+					result.add(candidate);
+				}
+			}
+		}
+		return result;
+	}
+}