1 /*
   2  * Copyright (c) 2014, 2015, Dynatrace and/or its affiliates. All rights reserved.
   3  * 
   4  * This file is part of the Lock Contention Tracing Subsystem for the HotSpot
   5  * Virtual Machine, which is developed at Christian Doppler Laboratory on
   6  * Monitoring and Evolution of Very-Large-Scale Software Systems. Please
   7  * contact us at <http://mevss.jku.at/> if you need additional information
   8  * or have any questions.
   9  *
  10  * This code is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License version 2 only, as
  12  * published by the Free Software Foundation.
  13  *
  14  * This code is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17  * version 2 for more details (a copy is included in the LICENSE file that
  18  * accompanied this code).
  19  *
  20  * You should have received a copy of the GNU General Public License version
  21  * 2 along with this work. If not, see <http://www.gnu.org/licenses/>.
  22  *
  23  */ 
  24 package sun.evtracing.processing.statistics.metadata;
  25 
  26 import java.util.Arrays;
  27 import java.util.stream.Collectors;
  28 
  29 import sun.evtracing.parser.metadata.JavaClass;
  30 
  31 public class JavaClassStack {
  32         
  33         public static final JavaClassStack HIDDEN = new JavaClassStack(JavaClass.UNKNOWN) {
  34                 @Override
  35                 public boolean equals(Object obj) {
  36                         return (this == obj);
  37                 }
  38         };
  39         
  40         private final JavaClass[] classes;
  41 
  42         public JavaClassStack(JavaClass... classes) {
  43                 this.classes = classes;
  44         }
  45 
  46         public JavaClass[] classes() {
  47                 return classes;
  48         }
  49 
  50         @Override
  51         public int hashCode() {
  52                 return Arrays.hashCode(classes);
  53         }
  54 
  55         @Override
  56         public boolean equals(Object obj) {
  57                 if (this == obj)
  58                         return true;
  59                 if (obj == null || getClass() != obj.getClass())
  60                         return false;
  61 
  62                 JavaClassStack other = (JavaClassStack) obj;
  63                 return Arrays.equals(classes, other.classes);
  64         }
  65 
  66         @Override
  67         public String toString() {
  68                 return Arrays.stream(classes).map(c -> c.toString()).collect(Collectors.joining(", "));
  69         }
  70 }