1 /*
2  * Copyright (c) 2013, 2018, 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.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 package metaspace.stressHierarchy.common.classloader.tree;
24 
25 import java.util.HashSet;
26 import java.util.Set;
27 
28 import metaspace.stressHierarchy.common.classloader.StressClassloader;
29 
30 /**
31  * Node of tree
32  *
33  */
34 public class Node {
35 
36     private int level;
37 
38     private Set<String> loadedClassesNames;
39 
40     private int number;
41 
42     private Set<Object> objects = new HashSet<Object>();
43 
44     private Node parent = null;
45 
46     private StressClassloader classloader;
47 
Node(int level, int number)48     public Node(int level, int number) {
49         this.level = level;
50         this.number = number;
51     }
52 
cleanup()53     public void cleanup() {
54         loadedClassesNames = getClassLoader().getLoadedClassNames();
55         objects.clear();
56         getClassLoader().getLoadedClasses().clear();
57         classloader = null;
58     }
59 
60     @Override
equals(Object obj)61     public boolean equals(Object obj) {
62         if (obj instanceof Node) {
63             Node other = (Node) obj;
64             return other.getLevel() == level && other.getNumber() == number;
65         } else {
66             return false;
67         }
68     }
69 
getClassLoader()70     StressClassloader getClassLoader() {     //package access level
71         return classloader;
72     }
73 
getLevel()74     public int getLevel() {
75         return level;
76     }
77 
getLoadedClasses()78     public Set<Class<?>> getLoadedClasses() {
79         return getClassLoader() == null ? null : getClassLoader().getLoadedClasses();
80     }
81 
getLoadedClassesNames()82     public Set<String> getLoadedClassesNames() {
83         if (loadedClassesNames != null) {
84             return loadedClassesNames;
85         } else if (getClassLoader() != null) {
86             return getClassLoader().getLoadedClassNames();
87         }
88         return null;
89     }
90 
getNumber()91     public int getNumber() {
92         return number;
93     }
94 
getParent()95     public Node getParent() {
96         return parent;
97     }
98 
99     @Override
hashCode()100     public int hashCode() {
101         return level + number * 999;
102     }
103 
instantiateObjects()104     public void instantiateObjects() throws InstantiationException, IllegalAccessException {
105         for (Class<?> c : getClassLoader().getLoadedClasses()) {
106             if (!c.isInterface()) {
107                 objects.add(c.newInstance());
108             }
109         }
110     }
111 
isRoot()112     public boolean isRoot() {
113         return (parent == null);
114     }
115 
setClassLoader(StressClassloader classLoader)116     public void setClassLoader(StressClassloader classLoader) {
117         classloader = classLoader;
118     }
119 
setParent(Node parent)120     public void setParent(Node parent) {
121         this.parent = parent;
122     }
123 
124     @Override
toString()125     public String toString() {
126         return "Node@level=" + level + "_num=" + number;
127     }
128 
loadClasses()129     public void loadClasses() throws ClassNotFoundException {
130         String className = "package_level" + getLevel() + "_num" + getNumber() + ".Dummy";
131         getClassLoader().loadClass(className);
132     }
133 
134 }
135