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.internal.settings;
  27 
  28 import java.util.Set;
  29 
  30 /**
  31  * Helper class for settings that use boolean numbers
  32  *
  33  */
  34 final class BooleanValue  {
  35     private String value = "false";
  36     private boolean booleanValue;
  37 
  38     private BooleanValue(boolean b) {
  39         booleanValue = b;
  40         value = b ? "true" : "false";
  41     }
  42 
  43     public String union(Set<String> values) {
  44         for (String v : values) {
  45             if ("true".equals(v)) {
  46                 return "true";
  47             }
  48         }
  49         return "false";
  50     }
  51 
  52     public void setValue(String value) {
  53         this.value = value;
  54         this.booleanValue = Boolean.valueOf(value);
  55     }
  56 
  57     public final String getValue() {
  58         return this.value;
  59     }
  60 
  61     public boolean getBoolean() {
  62         return booleanValue;
  63     }
  64 
  65     public static BooleanValue valueOf(String defaultValue) {
  66         if ("true".equals(defaultValue)) {
  67             return new BooleanValue(true);
  68         }
  69         if ("false".equals(defaultValue)) {
  70             return new BooleanValue(false);
  71         }
  72         throw new InternalError("Unknown default value for settings '" + defaultValue + "'");
  73     }
  74 }