--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/gc/arguments/GCTypes.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+import java.lang.management.GarbageCollectorMXBean;
+import java.lang.management.ManagementFactory;
+import java.util.Arrays;
+import java.util.Objects;
+
+/**
+ * Helper class with enum representation of GC types.
+ */
+public final class GCTypes {
+
+    private static <T extends GCType> T getCurrentGCType(Class<T> type) {
+        return ManagementFactory.getGarbageCollectorMXBeans().stream()
+                .map(bean -> getGCTypeByName(type, bean.getName()))
+                .filter(Objects::nonNull)
+                .findFirst()
+                .orElse(null);
+    }
+
+    private static <T extends GCType> T getGCTypeByName(Class<T> type, String name) {
+        return Arrays.stream(type.getEnumConstants())
+                .filter(e -> e.getGCName().equals(name))
+                .findFirst()
+                .orElse(null);
+    }
+
+    private static <T extends GCType> GarbageCollectorMXBean getGCBeanByType(Class<T> type) {
+        return ManagementFactory.getGarbageCollectorMXBeans().stream()
+                .filter(bean -> Arrays.stream(type.getEnumConstants())
+                        .filter(enumName -> enumName.getGCName().equals(bean.getName()))
+                        .findFirst()
+                        .isPresent()
+                )
+                .findFirst()
+                .orElse(null);
+    }
+
+    /**
+     * Helper interface used by GCTypes static methods
+     * to get gcTypeName field of *GCType classes.
+     */
+    private interface GCType {
+
+        String getGCName();
+    }
+
+    public static enum YoungGCType implements GCType {
+        DefNew("Copy"),
+        ParNew("ParNew"),
+        PSNew("PS Scavenge"),
+        G1("G1 Young Generation");
+
+        @Override
+        public String getGCName() {
+            return gcTypeName;
+        }
+        private final String gcTypeName;
+
+        private YoungGCType(String name) {
+            gcTypeName = name;
+        }
+
+        public static YoungGCType getYoungGCType() {
+            return GCTypes.getCurrentGCType(YoungGCType.class);
+        }
+
+        public static GarbageCollectorMXBean getYoungGCBean() {
+            return GCTypes.getGCBeanByType(YoungGCType.class);
+        }
+    }
+
+    public static enum OldGCType implements GCType {
+        Serial("MarkSweepCompact"),
+        CMS("ConcurrentMarkSweep"),
+        PSOld("PS MarkSweep"),
+        G1("G1 Old Generation");
+
+        private final String gcTypeName;
+
+        private OldGCType(String name) {
+            gcTypeName = name;
+        }
+
+        public static OldGCType getOldGCType() {
+            return GCTypes.getCurrentGCType(OldGCType.class);
+        }
+
+        @Override
+        public String getGCName() {
+            return gcTypeName;
+        }
+    }
+}