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 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * 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,
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 *
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package jdk.jfr;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

Event field annotation, specifies that a value represents an amount of data (for example, bytes).
Since:
9/**
 * Event field annotation, specifies that a value represents an amount of data (for example, bytes).
 *
 * @since 9
 */
@MetadataDefinition
@ContentType
@Label("Data Amount")
@Description("Amount of data")
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.FIELD, ElementType.TYPE, ElementType.METHOD})
public @interface DataAmount {
    
Unit for bits
/**
     * Unit for bits
     */
    public static final String BITS = "BITS";
    
Unit for bytes
/**
     * Unit for bytes
     */
    public static final String BYTES = "BYTES";

    
Returns the unit for the data amount, by default bytes.
Returns:
the data amount unit, default BYTES, not null/**
     * Returns the unit for the data amount, by default bytes.
     *
     * @return the data amount unit, default {@code BYTES}, not {@code null}
     */
    String value() default BYTES;
}