--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/graalunit/com.oracle.mxtool.junit/com/oracle/mxtool/junit/MxJUnitRequest.java	Thu Jun 28 17:07:34 2018 -0700
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.mxtool.junit;
+
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+import org.junit.runner.Description;
+import org.junit.runner.Request;
+import org.junit.runner.notification.Failure;
+
+public final class MxJUnitRequest {
+
+    private final Request request;
+
+    final Set<Class<?>> classes;
+    final String methodName;
+
+    final List<Failure> missingClasses;
+
+    private MxJUnitRequest(Request request, Set<Class<?>> classes, String methodName, List<Failure> missingClasses) {
+        this.request = request;
+        this.classes = classes;
+        this.methodName = methodName;
+        this.missingClasses = missingClasses;
+    }
+
+    public Request getRequest() {
+        return request;
+    }
+
+    public static final class BuilderException extends Exception {
+
+        private static final long serialVersionUID = 1L;
+
+        private BuilderException(String msg) {
+            super(msg);
+        }
+    }
+
+    public static class Builder {
+
+        private final Set<Class<?>> classes = new LinkedHashSet<>();
+        private String methodName = null;
+        private final List<Failure> missingClasses = new ArrayList<>();
+
+        protected Class<?> resolveClass(String name) throws ClassNotFoundException {
+            return Class.forName(name, false, Builder.class.getClassLoader());
+        }
+
+        public void addTestSpec(String arg) throws BuilderException {
+            String className;
+            /*
+             * Entries of the form class#method are handled specially. Only one can be specified on
+             * the command line as there's no obvious way to build a runner for multiple ones.
+             */
+            if (methodName != null) {
+                throw new BuilderException("Only a single class and method can be specified: " + arg);
+            } else if (arg.contains("#")) {
+                String[] pair = arg.split("#");
+                if (pair.length != 2) {
+                    throw new BuilderException("Malformed class and method request: " + arg);
+                } else if (!classes.isEmpty()) {
+                    throw new BuilderException("Only a single class and method can be specified: " + arg);
+                } else {
+                    methodName = pair[1];
+                    className = pair[0];
+                }
+            } else {
+                className = arg;
+            }
+            try {
+                Class<?> cls = resolveClass(className);
+                if ((cls.getModifiers() & Modifier.ABSTRACT) == 0) {
+                    classes.add(cls);
+                }
+            } catch (ClassNotFoundException e) {
+                Description description = Description.createSuiteDescription(className);
+                Failure failure = new Failure(description, e);
+                missingClasses.add(failure);
+            }
+        }
+
+        public MxJUnitRequest build() {
+            Request request;
+            if (methodName == null) {
+                request = Request.classes(classes.toArray(new Class<?>[0]));
+            } else {
+                request = Request.method(classes.iterator().next(), methodName);
+            }
+            return new MxJUnitRequest(request, classes, methodName, missingClasses);
+        }
+    }
+}