--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ObjectFactory.java	Wed Oct 30 19:43:52 2019 +0100
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2016, 2019, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 jdk.jfr.internal.consumer;
+
+import jdk.jfr.consumer.RecordedClass;
+import jdk.jfr.consumer.RecordedClassLoader;
+import jdk.jfr.consumer.RecordedFrame;
+import jdk.jfr.consumer.RecordedMethod;
+import jdk.jfr.consumer.RecordedStackTrace;
+import jdk.jfr.consumer.RecordedThread;
+import jdk.jfr.consumer.RecordedThreadGroup;
+import jdk.jfr.internal.Type;
+
+/**
+ * Abstract factory for creating specialized types
+ */
+public abstract class ObjectFactory<T> {
+    private static final JdkJfrConsumer PRIVATE_ACCESS = JdkJfrConsumer.instance();
+
+    private final static String TYPE_PREFIX_VERSION_1 = "com.oracle.jfr.types.";
+    private final static String TYPE_PREFIX_VERSION_2 = Type.TYPES_PREFIX;
+    public final static String STACK_FRAME_VERSION_1 = TYPE_PREFIX_VERSION_1 + "StackFrame";
+    public final static String STACK_FRAME_VERSION_2 = TYPE_PREFIX_VERSION_2 + "StackFrame";
+
+    static ObjectFactory<?> create(Type type, TimeConverter timeConverter) {
+        switch (type.getName()) {
+        case "java.lang.Thread":
+            return createThreadFactory(type, timeConverter);
+        case TYPE_PREFIX_VERSION_1 + "StackFrame":
+        case TYPE_PREFIX_VERSION_2 + "StackFrame":
+            return createFrameFactory(type, timeConverter);
+        case TYPE_PREFIX_VERSION_1 + "Method":
+        case TYPE_PREFIX_VERSION_2 + "Method":
+            return createMethodFactory(type, timeConverter);
+        case TYPE_PREFIX_VERSION_1 + "ThreadGroup":
+        case TYPE_PREFIX_VERSION_2 + "ThreadGroup":
+            return createdThreadGroupFactory(type, timeConverter);
+        case TYPE_PREFIX_VERSION_1 + "StackTrace":
+        case TYPE_PREFIX_VERSION_2 + "StackTrace":
+            return createStackTraceFactory(type, timeConverter);
+        case TYPE_PREFIX_VERSION_1 + "ClassLoader":
+        case TYPE_PREFIX_VERSION_2 + "ClassLoader":
+            return createClassLoaderFactory(type, timeConverter);
+        case "java.lang.Class":
+            return createClassFactory(type, timeConverter);
+        }
+        return null;
+    }
+
+    private static ObjectFactory<RecordedClass> createClassFactory(Type type, TimeConverter timeConverter) {
+        return new ObjectFactory<RecordedClass>(type, timeConverter) {
+            @Override
+            RecordedClass createTyped(ObjectContext objectContext, long id, Object[] values) {
+                return PRIVATE_ACCESS.newRecordedClass(objectContext, id, values);
+            }
+        };
+    }
+
+    private static ObjectFactory<?> createClassLoaderFactory(Type type, TimeConverter timeConverter) {
+        return new ObjectFactory<RecordedClassLoader>(type, timeConverter) {
+            @Override
+            RecordedClassLoader createTyped(ObjectContext objectContext, long id, Object[] values) {
+                return PRIVATE_ACCESS.newRecordedClassLoader(objectContext, id, values);
+            }
+        };
+    }
+
+    private static ObjectFactory<RecordedStackTrace> createStackTraceFactory(Type type, TimeConverter timeConverter) {
+        return new ObjectFactory<RecordedStackTrace>(type, timeConverter) {
+            @Override
+            RecordedStackTrace createTyped(ObjectContext objectContext, long id, Object[] values) {
+                return PRIVATE_ACCESS.newRecordedStackTrace(objectContext, values);
+            }
+        };
+    }
+
+    private static ObjectFactory<RecordedThreadGroup> createdThreadGroupFactory(Type type, TimeConverter timeConverter) {
+        return new ObjectFactory<RecordedThreadGroup>(type, timeConverter) {
+            @Override
+            RecordedThreadGroup createTyped(ObjectContext objectContext, long id, Object[] values) {
+                return PRIVATE_ACCESS.newRecordedThreadGroup(objectContext, values);
+            }
+        };
+    }
+
+    private static ObjectFactory<RecordedMethod> createMethodFactory(Type type, TimeConverter timeConverter) {
+        return new ObjectFactory<RecordedMethod>(type, timeConverter) {
+            @Override
+            RecordedMethod createTyped(ObjectContext objectContext, long id, Object[] values) {
+                return PRIVATE_ACCESS.newRecordedMethod(objectContext, values);
+            }
+        };
+    }
+
+    private static ObjectFactory<RecordedFrame> createFrameFactory(Type type, TimeConverter timeConverter) {
+        return new ObjectFactory<RecordedFrame>(type, timeConverter) {
+            @Override
+            RecordedFrame createTyped(ObjectContext objectContext, long id, Object[] values) {
+                return PRIVATE_ACCESS.newRecordedFrame(objectContext, values);
+            }
+        };
+    }
+
+    private static ObjectFactory<RecordedThread> createThreadFactory(Type type, TimeConverter timeConverter) {
+        return new ObjectFactory<RecordedThread>(type, timeConverter) {
+            @Override
+            RecordedThread createTyped(ObjectContext objectContext, long id, Object[] values) {
+                return PRIVATE_ACCESS.newRecordedThread(objectContext, id, values);
+            }
+        };
+    }
+
+    private final ObjectContext objectContext;
+
+    private ObjectFactory(Type type, TimeConverter timeConverter) {
+        this.objectContext = new ObjectContext(null, type.getFields(), timeConverter);
+    }
+
+    T createObject(long id, Object value) {
+        if (value == null) {
+            return null;
+        }
+        if (value instanceof Object[]) {
+            return createTyped(objectContext, id, (Object[]) value);
+        }
+        throw new InternalError("Object factory must have struct type. Type was " + value.getClass().getName());
+    }
+
+    abstract T createTyped(ObjectContext objectContextm, long id, Object[] values);
+}