1 /*
   2  * Copyright (c) 2016, 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.internal.module;
  27 
  28 /**
  29  * Represents the WARN_IF_RESOLVED reason as per the ModuleResolution attribute.
  30  */
  31 public enum WarnIfResolvedReason {
  32     /**
  33      * No warn reason.
  34      */
  35     NONE(0),
  36 
  37     /**
  38      * Deprecated warn reason.
  39      */
  40     DEPRECATED(ClassFileConstants.WARN_DEPRECATED),
  41 
  42     /**
  43      * Deprecated for removal warn reason.
  44      */
  45     DEPRECATED_FOR_REMOVAL(ClassFileConstants.WARN_DEPRECATED_FOR_REMOVAL),
  46 
  47     /**
  48      * Incubating warn reason.
  49      */
  50     INCUBATING(ClassFileConstants.WARN_INCUBATING);
  51 
  52     private final int classFileConstant;
  53 
  54     WarnIfResolvedReason(int classFileConstant) {
  55         this.classFileConstant = classFileConstant;
  56     }
  57 
  58     public int classFileConstant() {
  59         return classFileConstant;
  60     }
  61 
  62     public static WarnIfResolvedReason fromClassFileFlags(int value) {
  63         value = value & 0x000E;  // warn reason bits only
  64         switch (value) {
  65             case 0:
  66                 return NONE;
  67             case ClassFileConstants.WARN_DEPRECATED:
  68                 return DEPRECATED;
  69             case ClassFileConstants.WARN_DEPRECATED_FOR_REMOVAL:
  70                 return DEPRECATED_FOR_REMOVAL;
  71             case ClassFileConstants.WARN_INCUBATING:
  72                 return INCUBATING;
  73             default :
  74                 throw new InternalError("Unexpected value: " + value);
  75         }
  76     }
  77 }