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 sun.evtracing.parser.metadata.JavaClass;
  28 
  29 public class JavaObjectArrayStack extends JavaObjectStack {
  30 
  31         private final JavaObject[] objects;
  32 
  33         public JavaObjectArrayStack(JavaObject... objects) {
  34                 this.objects = objects;
  35         }
  36 
  37         public JavaObjectArrayStack(int size) {
  38                 this.objects = new JavaObject[size];
  39         }
  40 
  41         @Override
  42         public JavaObject top() {
  43                 JavaObject top = objects[objects.length - 1];
  44                 assert top != null;
  45                 return top;
  46         }
  47 
  48         @Override
  49         public JavaObject[] objects() {
  50                 assert Arrays.stream(objects).allMatch(o -> o != null);
  51                 return objects;
  52         }
  53 
  54         @Override
  55         public void setObject(int number, JavaObject obj) {
  56                 assert number < objects.length;
  57                 assert objects[number] == null;
  58                 objects[number] = obj;
  59         }
  60 
  61         @Override
  62         public JavaClassStack getClassStack() {
  63                 JavaClass[] classes = new JavaClass[objects.length];
  64                 for (int i = 0; i < objects.length; i++) {
  65                         classes[i] = objects[i].clazz();
  66                 }
  67                 return new JavaClassStack(classes);
  68         }
  69 
  70 }