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 package org.openide.util.lookup;

 import java.lang.ref.WeakReference;

 import java.util.*;

 import junit.framework.*;

 import org.netbeans.junit.*;

 import org.openide.util.Lookup;

 /** To simulate issue 42244.

  */

 @SuppressWarnings("unchecked") // XXX ought to be corrected, just a lot of them

 public class SimpleProxyLookupIssue42244Test extends AbstractLookupBaseHid implements AbstractLookupBaseHid.Impl {

     public SimpleProxyLookupIssue42244Test (java.lang.String testName) {

         super(testName, null);

     }

     public static Test suite() {

         // return new SimpleProxyLookupIssue42244Test("testGarbageCollect");

         return new NbTestSuite(SimpleProxyLookupIssue42244Test.class);

     }

     /** Creates an lookup for given lookup. This class just returns 

      * the object passed in, but subclasses can be different.

      * @param lookup in lookup

      * @return a lookup to use

      */

     public Lookup createLookup (final Lookup lookup) {

         class C implements Lookup.Provider {

             public Lookup getLookup () {

                 return lookup;

             }

         }

         return Lookups.proxy (new C ());

     }

     public Lookup createInstancesLookup (InstanceContent ic) {

         return new KeepResultsProxyLookup (new AbstractLookup (ic));

     }

     public void clearCaches () {

         KeepResultsProxyLookup k = (KeepResultsProxyLookup)this.instanceLookup;

         ArrayList toGC = new ArrayList ();

         Iterator it = k.allQueries.iterator ();

         while (it.hasNext ()) {

             Lookup.Result r = (Lookup.Result)it.next ();

             toGC.add (new WeakReference (r));

         }

         k.allQueries = null;

         it = toGC.iterator ();

         while (it.hasNext ()) {

             WeakReference r = (WeakReference)it.next ();

             assertGC ("Trying to release all results from memory", r);

         }

     }

     class KeepResultsProxyLookup extends ProxyLookup {

         private ArrayList allQueries = new ArrayList ();

         private ThreadLocal in = new ThreadLocal ();

         public KeepResultsProxyLookup (Lookup delegate) {

             super (new Lookup[] { delegate });

         }

         @Override

         protected void beforeLookup (org.openide.util.Lookup.Template template) {

             super.beforeLookup (template);

             if (allQueries != null && in.get () == null) {

                 in.set (this);

                 Lookup.Result res = lookup (template);

                 allQueries.add (res);

                 in.set (null);

             }

         }

     }

 }