jurt/test/com/sun/star/uno/WeakReference_Test.java

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  30
  31 package com.sun.star.uno;
  32
  33 import complexlib.ComplexTestCase;
  34 import java.util.ArrayList;
  35 import java.util.Iterator;
  36 import util.WaitUnreachable;
  37
  38 public final class WeakReference_Test extends ComplexTestCase {
  39     public String getTestObjectName() {
  40         return getClass().getName();
  41     }
  42
  43     public String[] getTestMethodNames() {
  44         return new String[] { "test" };
  45     }
  46
  47     public void test() {
  48         Object o = new MockWeak();
  49         WeakReference r1 = new WeakReference(o);
  50         WeakReference r2 = new WeakReference(r1);
  51         assure("", r1.get() == o);
  52         assure("", r2.get() == o);
  53         WaitUnreachable u = new WaitUnreachable(o);
  54         o = null;
  55         u.waitUnreachable();
  56         assure("a3", r1.get() == null);
  57         assure("a4", r2.get() == null);
  58     }
  59
  60     private static final class MockWeak implements XWeak {
  61         public XAdapter queryAdapter() {
  62             return adapter;
  63         }
  64
  65         protected void finalize() {
  66             adapter.dispose();
  67         }
  68
  69         private static final class Adapter implements XAdapter {
  70             public Adapter(Object obj) {
  71                 ref = new java.lang.ref.WeakReference(obj);
  72             }
  73
  74             public Object queryAdapted() {
  75                 return ref.get();
  76             }
  77
  78             public void addReference(XReference ref) {
  79                 synchronized (this) {
  80                     if (listeners != null) {
  81                         listeners.add(ref);
  82                         return;
  83                     }
  84                 }
  85                 ref.dispose();
  86             }
  87
  88             public synchronized void removeReference(XReference ref) {
  89                 if (listeners != null) {
  90                     listeners.remove(ref);
  91                 }
  92             }
  93
  94             public void dispose() {
  95                 ArrayList l;
  96                 synchronized (this){
  97                     l = listeners;
  98                     listeners = null;
  99                 }
 100                 if (l != null) {
 101                     java.lang.RuntimeException ex = null;
 102                     for (Iterator i = l.iterator(); i.hasNext();) {
 103                         try {
 104                             ((XReference) i.next()).dispose();
 105                         } catch (java.lang.RuntimeException e) {
 106                             ex = e;
 107                         }
 108                     }
 109                     if (ex != null) {
 110                         throw ex;
 111                     }
 112                 }
 113             }
 114
 115             private final java.lang.ref.WeakReference ref;
 116             private ArrayList listeners = new ArrayList();
 117         }
 118
 119         private final Adapter adapter = new Adapter(this);
 120     }
 121 }