--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/src/share/classes/jdk/jfr/consumer/EventParser.java	2019-01-29 10:59:04.667581523 +0800
@@ -0,0 +1,72 @@
+/*
+ * 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.consumer;
+
+import static jdk.jfr.internal.EventInstrumentation.FIELD_DURATION;
+
+import java.io.IOException;
+import java.util.List;
+
+import jdk.jfr.EventType;
+import jdk.jfr.ValueDescriptor;
+import jdk.jfr.internal.consumer.RecordingInput;
+
+/**
+ * Parses an event and returns a {@link RecordedEvent}.
+ *
+ */
+final class EventParser extends Parser {
+    private final Parser[] parsers;
+    private final EventType eventType;
+    private final TimeConverter timeConverter;
+    private final boolean hasDuration;
+    private final List<ValueDescriptor> valueDescriptors;
+
+    EventParser(TimeConverter timeConverter, EventType type, Parser[] parsers) {
+        this.timeConverter = timeConverter;
+        this.parsers = parsers;
+        this.eventType = type;
+        this.hasDuration = type.getField(FIELD_DURATION) != null;
+        this.valueDescriptors = type.getFields();
+    }
+
+    @Override
+    public Object parse(RecordingInput input) throws IOException {
+        Object[] values = new Object[parsers.length];
+        for (int i = 0; i < parsers.length; i++) {
+            values[i] = parsers[i].parse(input);
+        }
+        Long startTicks = (Long) values[0];
+        long startTime = timeConverter.convertTimestamp(startTicks);
+        if (hasDuration) {
+            long durationTicks = (Long) values[1];
+            long endTime = timeConverter.convertTimestamp(startTicks + durationTicks);
+            return new RecordedEvent(eventType, valueDescriptors, values, startTime, endTime, timeConverter);
+        } else {
+            return new RecordedEvent(eventType, valueDescriptors, values, startTime, startTime, timeConverter);
+        }
+    }
+}