/*

 * Copyright (c) 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.internal.settings;

import java.util.Objects;

import java.util.Set;

import jdk.jfr.BooleanFlag;

import jdk.jfr.Description;

import jdk.jfr.Label;

import jdk.jfr.MetadataDefinition;

import jdk.jfr.Name;

import jdk.jfr.internal.Control;

import jdk.jfr.internal.PlatformEventType;

import jdk.jfr.internal.Type;

import jdk.jfr.internal.Utils;

@MetadataDefinition

@Label("Cutoff")

@Description("Limit running time of event")

@Name(Type.SETTINGS_PREFIX + "Cutoff")

@BooleanFlag

public final class CutoffSetting extends Control {

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

    private String value = "0 ns";

    private final PlatformEventType eventType;

    public CutoffSetting(PlatformEventType eventType, String defaultValue) {

       super(defaultValue);

       this.eventType = Objects.requireNonNull(eventType);

    }

    @Override

    public String combine(Set<String> values) {

        long max = 0;

        String text = "0 ns";

        for (String value : values) {

            long l = parseValue(value);

            if (l > max) {

                text = value;

                max = l;

            }

        }

        return text;

    }

    @Override

    public void setValue(String value) {

        long l = parseValue(value);

        this.value = value;

        eventType.setCutoff(l);

    }

    private long parseValue(String value) {

        return isInfinity(value) ? Long.MAX_VALUE : Utils.parseTimespan(value);

    }

    @Override

    public String getValue() {

        return value;

    }

    public static boolean isType(long typeId) {

        return CutoffSetting.typeId == typeId;

    }

    private static boolean isInfinity(String s) {

        return s.equals("infinity");

    }

    public static long parseValueSafe(String value) {

        if (value == null) {

            return 0L;

        }

        try {

            return isInfinity(value) ? Long.MAX_VALUE : Utils.parseTimespan(value);

        } catch (NumberFormatException nfe) {

            return 0L;

        }

    }

}