/*

 * Copyright (c) 2016, 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.  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

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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);

        }

    }

}