1 /*

     2  * Copyright (c) 2016, 2018, 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 }