--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/nsk/share/ReferringObjectSet.java	Mon Apr 30 18:10:24 2018 -0700
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2006, 2018, 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 nsk.share;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+
+/*
+ *  Class create a number of referrers to given object
+ */
+public class ReferringObjectSet
+{
+        private Collection<ReferringObject> referringObjects;
+        private String referenceType;
+
+        public ReferringObjectSet(Object object, int referringCount, String referenceType)
+        {
+                this.referenceType = referenceType;
+                referringObjects = new ArrayList<ReferringObject>(referringCount);
+
+                for(int i = 0; i < referringCount; i++)
+                        referringObjects.add(new ReferringObject(object, referenceType));
+        }
+
+        public void delete(int count)
+        {
+                if((count < 0) || (count > referringObjects.size()))
+                {
+                        throw new TestBug("Invalid 'count' value: " + count + ", size=" + referringObjects.size());
+                }
+
+                Iterator<ReferringObject> iterator = referringObjects.iterator();
+
+                for(int i = 0; i < count; i++)
+                {
+                        ReferringObject referringObject = iterator.next();
+                        referringObject.delete();
+
+                        iterator.remove();
+                }
+        }
+
+        public void deleteAll()
+        {
+                delete(referringObjects.size());
+        }
+
+        public String getReferenceType() {
+            return referenceType;
+        }
+
+        public int getReferrerCount()
+        {
+                return referringObjects.size();
+        }
+}