1 package org.apache.maven.surefire.booter;
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22 import java.net.URL;
23 import java.net.URLClassLoader;
24 import java.util.HashSet;
25 import java.util.Set;
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30 public class IsolatedClassLoader
31 extends URLClassLoader
32 {
33 private final ClassLoader parent = ClassLoader.getSystemClassLoader();
34
35 private final Set<URL> urls = new HashSet<URL>();
36
37 private final String roleName;
38
39 private boolean childDelegation = true;
40
41 private static final URL[] EMPTY_URL_ARRAY = new URL[0];
42
43 public IsolatedClassLoader( ClassLoader parent, boolean childDelegation, String roleName )
44 {
45 super( EMPTY_URL_ARRAY, parent );
46
47 this.childDelegation = childDelegation;
48
49 this.roleName = roleName;
50 }
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56 @Deprecated
57 public void addURL( URL url )
58 {
59
60
61 if ( !urls.contains( url ) )
62 {
63 super.addURL( url );
64 urls.add( url );
65 }
66 }
67
68 public synchronized Class loadClass( String name )
69 throws ClassNotFoundException
70 {
71 if ( childDelegation )
72 {
73 Class<?> c = findLoadedClass( name );
74
75 if ( c == null )
76 {
77 try
78 {
79 c = findClass( name );
80 }
81 catch ( ClassNotFoundException e )
82 {
83 if ( parent == null )
84 {
85 throw e;
86 }
87 else
88 {
89 c = parent.loadClass( name );
90 }
91 }
92 }
93
94 return c;
95 }
96 else
97 {
98 return super.loadClass( name );
99 }
100 }
101
102 public String toString()
103 {
104 return "IsolatedClassLoader{roleName='" + roleName + "'}";
105 }
106 }