1 /*
   2  * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.consumer;
  27 
  28 import static jdk.jfr.internal.EventInstrumentation.FIELD_DURATION;
  29 
  30 import java.io.IOException;
  31 import java.util.List;
  32 
  33 import jdk.jfr.EventType;
  34 import jdk.jfr.ValueDescriptor;
  35 import jdk.jfr.internal.consumer.RecordingInput;
  36 
  37 /**
  38  * Parses an event and returns a {@link RecordedEvent}.
  39  *
  40  */
  41 final class EventParser extends Parser {
  42     private final Parser[] parsers;
  43     private final EventType eventType;
  44     private final TimeConverter timeConverter;
  45     private final boolean hasDuration;
  46     private final List<ValueDescriptor> valueDescriptors;
  47 
  48     EventParser(TimeConverter timeConverter, EventType type, Parser[] parsers) {
  49         this.timeConverter = timeConverter;
  50         this.parsers = parsers;
  51         this.eventType = type;
  52         this.hasDuration = type.getField(FIELD_DURATION) != null;
  53         this.valueDescriptors = type.getFields();
  54     }
  55 
  56     @Override
  57     public Object parse(RecordingInput input) throws IOException {
  58         Object[] values = new Object[parsers.length];
  59         for (int i = 0; i < parsers.length; i++) {
  60             values[i] = parsers[i].parse(input);
  61         }
  62         Long startTicks = (Long) values[0];
  63         long startTime = timeConverter.convertTimestamp(startTicks);
  64         if (hasDuration) {
  65             long durationTicks = (Long) values[1];
  66             long endTime = timeConverter.convertTimestamp(startTicks + durationTicks);
  67             return new RecordedEvent(eventType, valueDescriptors, values, startTime, endTime, timeConverter);
  68         } else {
  69             return new RecordedEvent(eventType, valueDescriptors, values, startTime, startTime, timeConverter);
  70         }
  71     }
  72 }