Java Code Examples for java.lang.ref.WeakReference

public ImageContainer doDisplay(View v, final String uri, BitmapDisplayConfig displayConfig, LoadingListener loadingListener) {
    	if (displayConfig == null) {
            displayConfig = mDisplayConfig;
        }
        final WeakReference<View> ref = new WeakReference<View>(v);
        final BitmapDisplayConfig curDisplayConfig = displayConfig;
        return doDisplay(ref.get(), uri, curDisplayConfig, new ImageListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
//                showImg(ref.get(), null, curDisplayConfig, false, false);
                mDisplayer.loadFailDisplay(ref.get(), curDisplayConfig);
            }

            @Override
            public void onResponse(ImageContainer response, boolean isImmediate) {
                if (response.getBitmap() == null) {
                    mDisplayer.loadDefaultDisplay(ref.get(), curDisplayConfig);
                } else {
                    curDisplayConfig.isImmediate = isImmediate;
                    mDisplayer.loadCompletedisplay(ref.get(), response.getBitmap(), curDisplayConfig);
                }
            }
        }, loadingListener);
    }
 

/**
 * Returns a <I>Channel</I> that generates connections to the
 * endpoint <I>ep</I>. A Channel is an object that creates and
 * manages connections of a particular type to some particular
 * address space.
 * @param ep the endpoint to which connections will be generated.
 * @return the channel or null if the transport cannot
 * generate connections to this endpoint
 */
public TCPChannel getChannel(Endpoint ep) {
    TCPChannel ch = null;
    if (ep instanceof TCPEndpoint) {
        synchronized (channelTable) {
            Reference<TCPChannel> ref = channelTable.get(ep);
            if (ref != null) {
                ch = ref.get();
            }
            if (ch == null) {
                TCPEndpoint tcpEndpoint = (TCPEndpoint) ep;
                ch = new TCPChannel(this, tcpEndpoint);
                channelTable.put(tcpEndpoint,
                                 new WeakReference<TCPChannel>(ch));
            }
        }
    }
    return ch;
}
 

@Override
public synchronized void Transform(SurfaceData src, SurfaceData dst,
                                   Composite comp, Region clip,
                                   AffineTransform at, int hint, int srcx,
                                   int srcy, int dstx, int dsty, int width,
                                   int height){
    Blit convertsrc = Blit.getFromCache(src.getSurfaceType(),
                                        CompositeType.SrcNoEa,
                                        SurfaceType.IntArgbPre);
    // use cached intermediate surface, if available
    final SurfaceData cachedSrc = srcTmp != null ? srcTmp.get() : null;
    // convert source to IntArgbPre
    src = convertFrom(convertsrc, src, srcx, srcy, width, height, cachedSrc,
                      BufferedImage.TYPE_INT_ARGB_PRE);

    // transform IntArgbPre intermediate surface to OpenGL surface
    performop.Transform(src, dst, comp, clip, at, hint, 0, 0, dstx, dsty,
                        width, height);

    if (src != cachedSrc) {
        // cache the intermediate surface
        srcTmp = new WeakReference<>(src);
    }
}
 

@SuppressWarnings({"rawtypes", "unchecked"})
private void setOwnedWindowsAlwaysOnTop(boolean alwaysOnTop) {
    WeakReference<Window>[] ownedWindowArray;
    synchronized (ownedWindowList) {
        ownedWindowArray = new WeakReference[ownedWindowList.size()];
        ownedWindowList.copyInto(ownedWindowArray);
    }

    for (WeakReference<Window> ref : ownedWindowArray) {
        Window window = ref.get();
        if (window != null) {
            try {
                window.setAlwaysOnTop(alwaysOnTop);
            } catch (SecurityException ignore) {
            }
        }
    }
}
 

/**
 * Returns the ChromeActivity that called the share intent picker.
 */
private ChromeActivity getTriggeringActivity() {
    int triggeringTaskId =
            IntentUtils.safeGetIntExtra(getIntent(), ShareHelper.EXTRA_TASK_ID, 0);
    List<WeakReference<Activity>> activities = ApplicationStatus.getRunningActivities();
    ChromeActivity triggeringActivity = null;
    for (int i = 0; i < activities.size(); i++) {
        Activity activity = activities.get(i).get();
        if (activity == null) continue;

        if (activity.getTaskId() == triggeringTaskId && activity instanceof ChromeActivity) {
            return (ChromeActivity) activity;
        }
    }
    return null;
}
 

@SuppressWarnings("unchecked")
public void handle(Callback[] callbacks)
    throws IOException, UnsupportedCallbackException {
    for (int i = 0; i < callbacks.length; i++) {
        if (callbacks[i] instanceof DelegationCallback) {
            DelegationCallback callback = (DelegationCallback) callbacks[i];
            Message message = callback.getCurrentMessage();
            
            if (message != null 
                && message.get(PhaseInterceptorChain.PREVIOUS_MESSAGE) != null) {
                WeakReference<SoapMessage> wr = 
                    (WeakReference<SoapMessage>)
                        message.get(PhaseInterceptorChain.PREVIOUS_MESSAGE);
                SoapMessage previousSoapMessage = wr.get();
                Element token = getTokenFromMessage(previousSoapMessage);
                if (token != null) {
                    callback.setToken(token);
                }
            }
            
        } else {
            throw new UnsupportedCallbackException(callbacks[i], "Unrecognized Callback");
        }
    }
}
 

private void activityStop(WeakReference<Activity> activity) {
    if (activity != null) {
        Context context = activity.get();
        if (context != null) {
            // 热图部分逻辑不能在子线程执行
            if (AgentProcess.getInstance().getConfig().isAutoHeatMap()) {
                checkLayoutListener(activity, false);
            }

            // 单队列线程执行
            AThreadPool.asyncMiddlePriorityExecutor(new Runnable() {
                @Override
                public void run() {
                    try {
                        // 调用AppEnd
                        appEnd();
                    }catch (Throwable ignore) {
                        ExceptionUtil.exceptionThrow(ignore);
                    }
                }
            });
        }
    }
}
 

static synchronized void putCachedRaster(ColorModel cm, Raster ras) {
    if (cached != null) {
        Raster cras = (Raster) cached.get();
        if (cras != null) {
            int cw = cras.getWidth();
            int ch = cras.getHeight();
            int iw = ras.getWidth();
            int ih = ras.getHeight();
            if (cw >= iw && ch >= ih) {
                return;
            }
            if (cw * ch >= iw * ih) {
                return;
            }
        }
    }
    cachedModel = cm;
    cached = new WeakReference<>(ras);
}
 

public RaygunErrorMessage(Throwable throwable) {
    if (throwable == null) {
        return;
    }

    this.throwable = new WeakReference<Throwable>(throwable);
    message = throwable.getClass().getSimpleName();
    String throwableMessage = throwable.getMessage();
    if (throwableMessage != null) {
        message = message.concat(": ").concat(throwableMessage);
    }
    className = throwable.getClass().getCanonicalName();

    if (throwable.getCause() != null) {
        innerError = new RaygunErrorMessage(throwable.getCause());
    }

    StackTraceElement[] ste = throwable.getStackTrace();
    stackTrace = new RaygunErrorStackTraceLineMessage[ste.length];

    for (int i = 0; i < ste.length; i++) {
        stackTrace[i] = new RaygunErrorStackTraceLineMessage(ste[i]);
    }
}
 

@TargetApi(24)
static void install(String externalResourceFile) {
    try {
        AssetManager newAssetManager = createAssetManager(externalResourceFile);

        // Find the singleton instance of ResourcesManager
        Class<?> clazz = Class.forName("android.app.ResourcesManager");
        Method mGetInstance = clazz.getDeclaredMethod("getInstance");
        mGetInstance.setAccessible(true);
        Object resourcesManager = mGetInstance.invoke(null);

        // Iterate over all known Resources objects
        Field mResourceReferences = clazz.getDeclaredField("mResourceReferences");
        mResourceReferences.setAccessible(true);
        @SuppressWarnings("unchecked")
        Collection<WeakReference<Resources>> references =
                (Collection<WeakReference<Resources>>) mResourceReferences.get(resourcesManager);

        setAssetManager(references, newAssetManager);
    } catch (IllegalAccessException | NoSuchFieldException | NoSuchMethodException |
            ClassNotFoundException | InvocationTargetException | InstantiationException e) {
        throw new IllegalStateException(e);
    }
}
 

LoginTask(Context context,
          String login, String password, Boolean privacy,
          String capVal, String capTime, String capSig) {
    mContext = new WeakReference<>(context);
    this.login = login;
    this.password = password;
    this.privacy = privacy;
    this.capVal = capVal;
    this.capTime = capTime;
    this.capSig = capSig;
    dialog = new MaterialDialog.Builder(mContext.get())
            .progress(true, 0)
            .cancelable(false)
            .content(R.string.performing_login)
            .build();
}
 

public static void startWithPaths(Fragment fragment, ArrayList<String> paths, String puzzleSaveDirPath, String puzzleSaveNamePrefix, int requestCode, boolean replaceCustom, @NonNull ImageEngine imageEngine) {
    if (null != toClass) {
        toClass.clear();
        toClass = null;
    }
    if (Setting.imageEngine != imageEngine) {
        Setting.imageEngine = imageEngine;
    }
    Intent intent = new Intent(fragment.getActivity(), PuzzleActivity.class);
    intent.putExtra(Key.PUZZLE_FILE_IS_PHOTO, false);
    intent.putStringArrayListExtra(Key.PUZZLE_FILES, paths);
    intent.putExtra(Key.PUZZLE_SAVE_DIR, puzzleSaveDirPath);
    intent.putExtra(Key.PUZZLE_SAVE_NAME_PREFIX, puzzleSaveNamePrefix);
    if (replaceCustom) {
        toClass = new WeakReference<Class<? extends Activity>>(fragment.getActivity().getClass());
    }
    fragment.startActivityForResult(intent, requestCode);
}
 

/**
 * Took this cacheRaster code from GradientPaint. It appears to recycle
 * rasters for use by any other instance, as long as they are sufficiently
 * large.
 */
private static synchronized void putCachedRaster(ColorModel cm,
                                                 Raster ras)
{
    if (cached != null) {
        Raster cras = (Raster) cached.get();
        if (cras != null) {
            int cw = cras.getWidth();
            int ch = cras.getHeight();
            int iw = ras.getWidth();
            int ih = ras.getHeight();
            if (cw >= iw && ch >= ih) {
                return;
            }
            if (cw * ch >= iw * ih) {
                return;
            }
        }
    }
    cachedModel = cm;
    cached = new WeakReference<Raster>(ras);
}
 

/** Get WsdlModeler for particular WSDL
 */
public WsdlModeler getWsdlModeler(URL wsdlUrl) {
    WsdlModeler modeler = null;
    synchronized (modelers) {
        modeler = getFromCache(wsdlUrl);
        if (modeler!=null) {
            return modeler;
        }
        modeler = new WsdlModeler(wsdlUrl);
        modelers.put(wsdlUrl, new WeakReference<WsdlModeler>(modeler));
    }
    return modeler;
}
 

@Override
public void removePluginJarChangeListener(final PluginJarChangeListener listener) {
    WeakReference<PluginJarChangeListener> referenceOfListenerToBeRemoved = IterableUtils.find(pluginJarChangeListeners, listenerWeakReference -> {
        PluginJarChangeListener registeredListener = listenerWeakReference.get();
        return registeredListener != null && registeredListener == listener;
    });
    pluginJarChangeListeners.remove(referenceOfListenerToBeRemoved);
    removeClearedWeakReferences();
}
 

private static Window[] getWindows(AppContext appContext) {
    synchronized (Window.class) {
        Window realCopy[];
        @SuppressWarnings("unchecked")
        Vector<WeakReference<Window>> windowList =
            (Vector<WeakReference<Window>>)appContext.get(Window.class);
        if (windowList != null) {
            int fullSize = windowList.size();
            int realSize = 0;
            Window fullCopy[] = new Window[fullSize];
            for (int i = 0; i < fullSize; i++) {
                Window w = windowList.get(i).get();
                if (w != null) {
                    fullCopy[realSize++] = w;
                }
            }
            if (fullSize != realSize) {
                realCopy = Arrays.copyOf(fullCopy, realSize);
            } else {
                realCopy = fullCopy;
            }
        } else {
            realCopy = new Window[0];
        }
        return realCopy;
    }
}
 

@Override
public void removeDimensionConfigListener(DimensionConfigListener l) {
	Iterator<WeakReference<DimensionConfigListener>> it = listeners.iterator();
	while (it.hasNext()) {
		DimensionConfigListener listener = it.next().get();
		if (listener == null || listener == l) {
			it.remove();
		}
	}
}
 

private void addToWindowList() {
    synchronized (Window.class) {
        @SuppressWarnings("unchecked")
        Vector<WeakReference<Window>> windowList = (Vector<WeakReference<Window>>)appContext.get(Window.class);
        if (windowList == null) {
            windowList = new Vector<WeakReference<Window>>();
            appContext.put(Window.class, windowList);
        }
        windowList.add(weakThis);
    }
}
 

static <T extends ID> T getObjCObjectFor(final JObjCRuntime runtime, final long objPtr){
    if (objPtr == 0) return null;

    final WeakReference cachedObj = objectCache.get().get(objPtr);
    if(cachedObj != null && cachedObj.get() != null) return (T) cachedObj.get();

    final long clsPtr = NSClass.getClass(objPtr);

    final T newObj = (T) (runtime.subclassing.isUserClass(clsPtr) ?
            Subclassing.getJObjectFromIVar(objPtr)
            : createNewObjCObjectFor(runtime, objPtr, clsPtr));

    objectCache.get().put(objPtr, new WeakReference(newObj));
    return newObj;
}
 

WindowsPathWithAttributes(WindowsFileSystem fs,
                          WindowsPathType type,
                          String root,
                          String path,
                          BasicFileAttributes attrs)
{
    super(fs, type, root, path);
    ref = new WeakReference<BasicFileAttributes>(attrs);
}
 

private void applyChildren(final Object[] ch, RefreshingInfo refreshInfo, boolean doSetObject) {
    //System.err.println(this.hashCode()+" applyChildren("+refreshSubNodes+")");
    //System.err.println("applyChildren("+Arrays.toString(ch)+", "+doSetObject+")");
    int i, k = ch.length; 
    for (i = 0; i < k; i++) {
        if (ch [i] == null) {
            throw new NullPointerException("Null child at index "+i+", parent: "+object+", model: "+model+"\nAll children are: "+Arrays.toString(ch));
        }
        if (doSetObject) {
            WeakReference<TreeModelNode> wr;
            synchronized (objectToNode) {
                wr = objectToNode.get(ch [i]);
            }
            if (wr == null) continue;
            TreeModelNode tmn = wr.get ();
            if (tmn == null) continue;
            if (refreshInfo == null || refreshInfo.isRefreshSubNodes(ch[i])) {
                tmn.setObject (ch [i]);
            } else {
                tmn.setObjectNoRefresh(ch[i]);
            }
        }
    }
    setKeys (ch);

    SwingUtilities.invokeLater (new Runnable () {
        public void run () {
            int i, k = ch.length;
            for (i = 0; i < k; i++)
                expandIfSetToExpanded(ch[i]);
        }
    });
}
 

public MyFansAdapter(BitBaseFragment fragment,
                     Context context,
                     TitleCountVO header,
                     List<MyFansListResp.AttentionInfoBean> attentionInfoBeans,
                     MyFansAttentionClickListener listener,
                     boolean isNeedHeader) {
    super(context, header, attentionInfoBeans, isNeedHeader);
    this.mListener = listener;
    this.mFragment = new WeakReference<>(fragment);
}
 

public static void releaseOther(QSVideoView qs) {
    for (WeakReference<QSVideoView> w : videos) {
        QSVideoView q = w.get();
        if (q != null & q != qs)
            q.release();
    }
}
 

private Report getReport(boolean create) {
    Report report = reportReference == null ? null : reportReference.get();
    if (report == null && create) {
        report = new Report();
        reportReference = new WeakReference<Report>(report);
    }
    return report;
}
 

@Override
public Object instantiateItem(ViewGroup container, int position) {
  Object item = super.instantiateItem(container, position);
  if (item instanceof Fragment) {
    holder.put(position, new WeakReference<Fragment>((Fragment) item));
  }
  return item;
}
 

/**
 * test for issue #106218
 * @throws java.lang.Exception
 */
@RandomlyFails // OOME in NB-Core-Build #1908
public void testWeakSetIntegrity() throws Exception {
    //CharSequence log = Log.enable(WeakSet.class.getName(), Level.FINE);
    ArrayList<WeakReference<TestObj>> awr = new ArrayList<WeakReference<TestObj>>();
    ExecutorService exec = Executors.newFixedThreadPool(5);
    exec.execute(new GC());
    for (int i = 0; i < 1000; i++) {
        TestObj to = new TestObj("T" + i);
        awr.add(new WeakReference<TestObj>(to));
        Thread.yield();
        for (WeakReference<TestObj> wro : awr) {
            TestObj wroo = wro.get();
            if (wroo != null) {
                synchronized (TestObj.testObjs) {
                    boolean found = false;
                    for (TestObj o : TestObj.testObjs) {
                        if (o == wroo) {
                            found = true;
                        }
                    }
                    if (found != TestObj.testObjs.contains(wroo)) {
                        //System.out.println(log.toString());
                        fail("Inconsistency of iterator chain and hash map");
                    }
                }
            }
        }
    }
    exec.shutdownNow();
}
 

private static Graphics2D addRenderingHints(BufferedImage image) {
    Graphics2D g2d = image.createGraphics();
    g2d.setRenderingHint(
            RenderingHintsKeyExt.KEY_BUFFERED_IMAGE, new WeakReference<BufferedImage>(image));
    g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
    g2d.setRenderingHint(
            RenderingHints.KEY_ALPHA_INTERPOLATION,
            RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
    g2d.setRenderingHint(
            RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
    return g2d;
}
 

@Override
public void recycle() {
    active.clear();
    List<WeakReference<CGImage>> next = new ArrayList<>();
    for (WeakReference<CGImage> item : pool) {
        CGImage cur = item.get();
        if (cur != null) {
            trashCGImageMemory(cur);
            next.add(item);
        }
    }
    pool = next;
}
 

MyOnNavigationItemSelectedListener(ViewPager viewPager, BottomNavigationViewInner bnve, boolean smoothScroll, OnNavigationItemSelectedListener listener) {
    this.viewPagerRef = new WeakReference<>(viewPager);
    this.listener = listener;
    this.smoothScroll = smoothScroll;

    // create items
    Menu menu = bnve.getMenu();
    int size = menu.size();
    items = new SparseIntArray(size);
    for (int i = 0; i < size; i++) {
        int itemId = menu.getItem(i).getItemId();
        items.put(itemId, i);
    }
}
 

public PlaceDownloaderTask(PlaceViewActivity parent) {
	super();
	mParent = new WeakReference<PlaceViewActivity>(parent);

	if (!HAS_NETWORK) {
		mStubBitmap = BitmapFactory.decodeResource(parent.getResources(),
				R.drawable.stub);
		mockLoc1.setLatitude(37.422);
		mockLoc1.setLongitude(-122.084);
		mockLoc2.setLatitude(38.996667);
		mockLoc2.setLongitude(-76.9275);
	}
}
 

public WeakChangeListener(ChangeAware source, ChangeListener listener) {
    if (listener == null) {
        throw new IllegalArgumentException("Cannot wrap a null listener");
    }
    if (source != null) {
        this.sourceRef = new WeakReference<>(source);
    }
    this.listenerRef = new WeakReference<>(listener);
}
 

CameraWifiController(IrisClient irisClient, ModelSource<DeviceModel> modelSource) {
    this.client = irisClient;
    this.source = modelSource;
    this.networks = new ArrayList<>();
    this.callback = new WeakReference<>(null);
    this.availableSecurityTypes = new ArrayList<>();
    this.modelListenerReg = this.source.addModelListener(modelEventListener);
    this.source.load().onSuccess(onDeviceLoadedListener);
}
 

public void removeWeakReferenceTo(T reference) {
	for (Iterator<WeakReference<T>> iterator = iterator(); iterator.hasNext(); ) {
		if (reference == iterator.next().get()) {
			iterator.remove();
		}
	}
}
 

/**
 * @return the natures that were created.
 */
public static List<PythonNature> getInitializedPythonNatures() {
    ArrayList<PythonNature> ret = new ArrayList<PythonNature>();
    synchronized (createdNatures) {
        for (Iterator<WeakReference<PythonNature>> it = createdNatures.iterator(); it.hasNext();) {
            PythonNature pythonNature = it.next().get();
            if (pythonNature == null) {
                it.remove();
            } else if (pythonNature.getProject() != null) {
                ret.add(pythonNature);
            }
        }
    }
    return ret;
}
 

public V getValue(K key) {
    WeakReference<V> wr = super.get(key);
    if (wr != null) {
        return wr.get();
    }
    return null;
}
 

private static void notifyBlocked(BlockInfo blockInfo) {
    Iterator<WeakReference<BlockObserver>> iterator = sBlockObservers.iterator();
    while (iterator.hasNext()) {
        WeakReference<BlockObserver> observerWeakReference = iterator.next();
        BlockObserver observer = observerWeakReference.get();
        if (observer == null) {
            iterator.remove();
        } else {
            observer.onBlock(blockInfo);
        }
    }
}
 

public DevAlertEnabled(Context context, DevAlertConfig config) {
    mConfig = config;
    mErrorQueue = new ArrayDeque<>();
    mWarningQueue = new ArrayDeque<>();
    mIgnoredTags = new HashSet<>(mConfig.getIgnoredTags());
    mCurrentActivity = new WeakReference<>(null);
    loadIgnoreList(context);
}
 

/**
 * Construct instance of AnalyticsBroadcaster that holds a {@link WeakReference} to the context.
 *
 * @param context Context that will be used for broadcasting
 * @param blacklist variable list of URL strings that will be used to blacklist broadcasts.
 */
AnalyticsBroadcaster(@NonNull Context context, boolean enabled, String... blacklist) {
  this.context = new WeakReference<>(context);
  this.enabled = enabled;
  this.blacklist = new ArrayList<>(blacklist.length);
  for (String url : blacklist) {
    try {
      this.blacklist.add(new URL(url));
    } catch (MalformedURLException ignored) {
    }
  }
}
 

void test() throws Exception {
    SwingUtilities.invokeAndWait(new Runnable() {
        public void run() {
            UIDefaults d = new UIDefaults();
            d.put("Label.textForeground", Color.MAGENTA);

            JLabel l = new JLabel();
            ref = new WeakReference<JLabel>(l);
            l.putClientProperty("Nimbus.Overrides", d);

            f = new JFrame();
            f.getContentPane().add(l);
            f.pack();
            f.setVisible(true);
        }
    });
    Thread.sleep(2000);

    SwingUtilities.invokeAndWait(new Runnable() {
        public void run() {
            f.getContentPane().removeAll();
            f.setVisible(false);
            f.dispose();
        }
    });
    Thread.sleep(2000);
}
 

private synchronized Iterable<? extends Reference<ProjectProblemsProvider>> getProviders() {
    if (providers == null) {
        final Collection<Reference<ProjectProblemsProvider>> newProviders = new LinkedHashSet<Reference<ProjectProblemsProvider>>();
        for (ProjectProblemsProvider provider : lkp.lookupAll(ProjectProblemsProvider.class)) {
            provider.addPropertyChangeListener(WeakListeners.propertyChange(this, provider));
            newProviders.add(new WeakReference<ProjectProblemsProvider>(provider));
        }
        providers = newProviders;
    }
    return providers;
}