1 /*
   2  * Copyright (c) 2016, 2019, 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;
  27 
  28 import java.lang.annotation.ElementType;
  29 import java.lang.annotation.Retention;
  30 import java.lang.annotation.RetentionPolicy;
  31 import java.lang.annotation.Target;
  32 
  33 /**
  34  * Event field annotation to use on fractions, typically between {@code 0.0}
  35  * and {@code 1.0}, to specify that the value is a percentage.
  36  * <p>
  37  * For example, a field with the value {@code 0.5} annotated by this annotation,
  38  * should be interpreted as {@code 50%} and rendered in a graphical user
  39  * interface with a percentage sign to avoid confusion with {@code 0.005%}.
  40  *
  41  * @since 8
  42  */
  43 @MetadataDefinition
  44 @ContentType
  45 @Label("Percentage")
  46 @Description("Percentage, represented as a number between 0 and 1")
  47 @Retention(RetentionPolicy.RUNTIME)
  48 @Target({ ElementType.FIELD, ElementType.TYPE, ElementType.METHOD})
  49 public @interface Percentage {
  50 }