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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * This code is free software; you can redistribute it and/or modify it

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 * 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,

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package jdk.jfr.internal.settings;

import java.util.Objects;

import java.util.Set;

import jdk.jfr.Description;

import jdk.jfr.Label;

import jdk.jfr.MetadataDefinition;

import jdk.jfr.Name;

import jdk.jfr.Timespan;

import jdk.jfr.internal.PlatformEventType;

import jdk.jfr.internal.Control;

import jdk.jfr.internal.Type;

import jdk.jfr.internal.Utils;

@MetadataDefinition

@Label("Threshold")

@Name(Type.SETTINGS_PREFIX + "Threshold")

@Description("Record event with duration above or equal to threshold")

@Timespan

public final class ThresholdSetting extends Control {

    private final static long typeId = Type.getTypeId(ThresholdSetting.class);

    private String value = "0 ns";

    private final PlatformEventType eventType;

    public ThresholdSetting(PlatformEventType eventType, String defaultValue) {

       super(defaultValue);

       this.eventType = Objects.requireNonNull(eventType);

    }

    @Override

    public String combine(Set<String> values) {

        Long min = null;

        String text = null;

        for (String value : values) {

            long l = Utils.parseTimespanWithInfinity(value);

            // always accept first value

            if (min == null) {

                min = l;

                text = value;

            } else {

                if (l < min) {

                    text = value;

                    min = l;

                }

            }

        }

        return text == null ? "0 ns" : text;

    }

    @Override

    public void setValue(String value) {

        long l = Utils.parseTimespanWithInfinity(value);

        this.value = value;

        eventType.setThreshold(l);

    }

    @Override

    public String getValue() {

        return value;

    }

    public static boolean isType(long typeId) {

        return ThresholdSetting.typeId == typeId;

    }

}