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1
19
20 package org.netbeans.modules.j2ee.metadata;
21
22 import java.beans.PropertyChangeEvent  ;
23 import java.beans.PropertyChangeListener ;
24 import java.beans.PropertyChangeSupport ;
25 import java.lang.ref.WeakReference ;
26 import java.net.URL ;
27 import java.util.ArrayList ;
28 import java.util.Arrays ;
29 import java.util.HashSet ;
30 import java.util.List ;
31 import java.util.Set ;
32 import org.netbeans.junit.NbTestCase;
33 import org.netbeans.modules.j2ee.metadata.*;
34 import org.netbeans.spi.java.classpath.ClassPathImplementation;
35 import org.netbeans.spi.java.classpath.PathResourceImplementation;
36 import org.netbeans.spi.java.classpath.support.ClassPathSupport;
37
38
42 public class WeakProxyClassPathImplementationTest extends NbTestCase {
43
44 public WeakProxyClassPathImplementationTest(String testName) {
45 super(testName);
46 }
47
48 public void testWeakProxyClassPathImplementation() throws Exception {
49 class PCL implements PropertyChangeListener {
50
51 private int changeCount;
52
53 public void propertyChange(PropertyChangeEvent event) {
54 changeCount++;
55 }
56
57 private boolean testChangeAndReset() {
58 boolean result = changeCount > 0;
59 changeCount = 0;
60 return result;
61 }
62 }
63
64 URL url11 = new URL ("file:///foo/bar11/");
65 URL url12 = new URL ("file:///foo/bar12/");
66 URL url2 = new URL ("file:///foo/bar2/");
67 URL url3 = new URL ("file:///foo/bar3/");
68
69 ClassPathImpl classPath1 = new ClassPathImpl(new URL [] { url11 });
70 ClassPathImpl classPath2 = new ClassPathImpl(new URL [] { url2 });
71 ClassPathImpl classPath3 = new ClassPathImpl(new URL [] { url3 });
72
73 WeakProxyClassPathImplementation proxyClassPath = new WeakProxyClassPathImplementation(new ClassPathImplementation[] { classPath1, classPath2, classPath3 });
74 PCL pcl = new PCL();
75 proxyClassPath.addPropertyChangeListener(pcl);
76
77 assertResources(proxyClassPath.getResources(), new URL [] { url11, url2, url3 });
78
79
81 classPath1.setResources(new URL [] { url11, url12 });
82
83 assertTrue(pcl.testChangeAndReset());
84 assertResources(proxyClassPath.getResources(), new URL [] { url11, url12, url2, url3 });
85
86
88 WeakReference <ClassPathImpl> classPath2Ref = new WeakReference <ClassPathImpl>(classPath2);
89 classPath2 = null;
90 assertGC("Should be able to gc classpath2", classPath2Ref);
91 assertTrue(pcl.testChangeAndReset());
92 assertResources(proxyClassPath.getResources(), new URL [] { url11, url12, url3 });
93
94
96 classPath3.setResources(new URL [] { });
97
98 assertTrue(pcl.testChangeAndReset());
99 assertResources(proxyClassPath.getResources(), new URL [] { url11, url12 });
100
101 WeakReference <ClassPathImpl> classPath1Ref = new WeakReference <ClassPathImpl>(classPath1);
102 WeakReference <ClassPathImpl> classPath3Ref = new WeakReference <ClassPathImpl>(classPath3);
103 classPath1 = null;
104 classPath3 = null;
105 assertGC("Should be able to gc classpath1", classPath1Ref);
106 assertGC("Should be able to gc classpath3", classPath3Ref);
107 assertResources(proxyClassPath.getResources(), new URL [0]);
108 }
109
110 private static void assertResources(List <PathResourceImplementation> expected, URL [] actual) {
111 Set <URL > expectedSet = new HashSet <URL >();
112 for (PathResourceImplementation resource: expected) {
113 expectedSet.add(resource.getRoots()[0]);
116 }
117 Set <URL > actualSet = new HashSet <URL >(Arrays.asList(actual));
118 assertEquals(expectedSet, actualSet);
119 }
120
121 private static final class ClassPathImpl implements ClassPathImplementation {
122
123 private final PropertyChangeSupport propChangeSupport = new PropertyChangeSupport (this);
124
125 private List <PathResourceImplementation> resources;
126
127 public ClassPathImpl(URL [] urls) {
128 setResources(urls);
129 }
130
131 public void addPropertyChangeListener(PropertyChangeListener listener) {
132 propChangeSupport.addPropertyChangeListener(listener);
133 }
134
135 public void removePropertyChangeListener(PropertyChangeListener listener) {
136 propChangeSupport.removePropertyChangeListener(listener);
137 }
138
139 public List <PathResourceImplementation> getResources() {
140 return resources;
141 }
142
143 public void setResources(URL [] urls) {
144 List <PathResourceImplementation> newResources = new ArrayList <PathResourceImplementation>();
145 for (URL url : urls) {
146 newResources.add(ClassPathSupport.createResource(url));
147 }
148 resources = newResources;
149 propChangeSupport.firePropertyChange(ClassPathImplementation.PROP_RESOURCES, null, null);
150 }
151 }
152 }
153 |
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