Examples of java.lang.ref.WeakReference

java.lang.ref.WeakReference
Weak reference objects, which do not prevent their referents from being made finalizable, finalized, and then reclaimed. Weak references are most often used to implement canonicalizing mappings.
Suppose that the garbage collector determines at a certain point in time that an object is weakly reachable. At that time it will atomically clear all weak references to that object and all weak references to any other weakly-reachable objects from which that object is reachable through a chain of strong and soft references. At the same time it will declare all of the formerly weakly-reachable objects to be finalizable. At the same time or at some later time it will enqueue those newly-cleared weak references that are registered with reference queues. @version 1.19, 11/17/05 @author Mark Reinhold @since 1.2

     * <p> The <code>eventManager</code> and <code>properties</code>
     * helper fields are initialized by this constructor; no other
     * non-private fields are set.
     */
    public PlanarImage() {
        this.weakThis = new WeakReference(this);


        // Create an event manager.
        eventManager = new PropertyChangeSupportJAI(this);


        // Copy the properties by reference.

View Full Code Here


        boolean result = false;
        if(sink instanceof PlanarImage) {
      result = sinks.add(((PlanarImage)sink).weakThis);
        } else {
            result = sinks.add(new WeakReference(sink));
        }


        return result;
    }

View Full Code Here

                  int tileX,
                  int tileY,
                  Raster tile,
                  Object tileCacheMetric) {


        this.owner = new WeakReference(owner);
        this.tile  = tile;
        this.tileX = tileX;
        this.tileY = tileY;


        this.tileCacheMetric = tileCacheMetric;  // may be null

View Full Code Here

            setEnabled(undo.isEnabled());
        }
        else {
            setEnabled(false);
        }
        docRef = new WeakReference(doc);
    }

View Full Code Here

                setEnabled(newUndo.isEnabled());
            }
            else {
                setEnabled(false);
            }
            docRef = new WeakReference(newDoc);
        }
    }

View Full Code Here

        }


        if (m_tileReaper != null) {
            // TODO: do we need this?
            synchronized ( this ) {
                WeakReference weakKey = null;


                Set keySet = m_imageMap.keySet();
                Iterator it = keySet.iterator();
                while (it.hasNext()) {
                    WeakReference ref = (WeakReference) it.next();


                    if (ref.get() == owner) {
                        weakKey = ref;
                        break;
                    }
                }


                // weakKey = (WeakReference) m_weakRefMap.get(owner);


                if (weakKey == null) {
                    weakKey = new WeakReference( owner, m_tileReaper.getRefQ() );
                    // m_weakRefMap.put(owner, weakKey);
                }


                Set hashKeys = (HashSet) m_imageMap.get(weakKey);

View Full Code Here

         */
        TileReaper( LCTileCache tileCache ) {
            super("TileReaper");
            setDaemon( true );
            m_refQ = new ReferenceQueue();
            m_tileCacheRef = new WeakReference( tileCache );
        }

View Full Code Here

                  int tileX,
                  int tileY,
                  Raster tile,
                  Object tileCacheMetric) {


        this.owner = new WeakReference(owner);
        this.tile  = tile;
        this.tileX = tileX;
        this.tileY = tileY;


        this.tileCacheMetric = tileCacheMetric;  // may be null

View Full Code Here

     * Notify listeners that the set of Document files associated with the
     * given image File has changed.
     */
    private static void notifyListeners(File imageFile) {
        for (Iterator i=Listeners.iterator(); i.hasNext(); ) {
            WeakReference ref = (WeakReference) i.next();
            DocumentDatabaseListener listener =
                (DocumentDatabaseListener) ref.get();
            if (listener != null) {
                listener.docFilesChanged(imageFile);
            }
            else {
                i.remove();

View Full Code Here

        super(
            new CodeSource(
                RevisionAsJarURL.create(bundle),
                (Certificate[]) certificates),
            null, null, null);
        m_felix = new WeakReference(felix);
        m_bundle = new WeakReference(bundle);
        m_revision = new WeakReference(bundle.adapt(BundleRevisionImpl.class));
        m_hashCode = bundle.hashCode();
        m_toString = "[" + bundle + "]";
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of java.lang.ref.WeakReference

ae.java.awt.KeyboardFocusManager

ae.java.awt.TexturePaintContext

ae.sun.font.Type1Font

ae.sun.java2d.Disposer

ae.sun.java2d.pipe.AlphaPaintPipe

bench.rmi.BenchServerImpl

bsh.classpath.BshClassPath

claypool.server.FileMonitor

com.lightcrafts.app.menu.RevertMenuItem

com.lightcrafts.mediax.jai.PlanarImage

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.