Example usage for java.lang.ref WeakReference WeakReference

Introduction

In this page you can find the example usage for java.lang.ref WeakReference WeakReference.

Prototype

public WeakReference(T referent)

Source Link

Document

Creates a new weak reference that refers to the given object.

Usage

From source file:com.creativtrendz.folio.ui.FolioWebViewScroll.java

public void setListener(final Activity activity, final Listener listener, final int requestCodeFilePicker) {
    if (activity != null) {
        mActivity = new WeakReference<>(activity);
    } else {/*from   w  ww .  ja  va2s.co m*/
        mActivity = null;
    }

    setListener(listener, requestCodeFilePicker);
}

From source file:br.com.anteros.social.instagram.AnterosInstagramSession.java

public void setActivity(Activity activity) {
    this.activity = new WeakReference<>(activity);
}

From source file:com.am.pagergradienttab.view.PagerGradientTabStrip.java

void updateAdapter(PagerAdapter oldAdapter, PagerAdapter newAdapter) {
    if (oldAdapter != null) {
        oldAdapter.unregisterDataSetObserver(mPageListener);
        mWatchingAdapter = null;/*from w  ww .  ja v a 2s  .  c om*/
    }
    tabs.clear();
    if (newAdapter != null) {
        newAdapter.registerDataSetObserver(mPageListener);
        mWatchingAdapter = new WeakReference<PagerAdapter>(newAdapter);
        mLastKnownPosition = mPager.getCurrentItem();
        currectPager = mLastKnownPosition;
        nextPager = mLastKnownPosition;
        for (int i = 0; i < newAdapter.getCount(); i++) {
            tabs.add(newAdapter.getPageTitle(i).toString());
        }
    }
    if (mPager != null) {
        requestLayout();
    }

}

From source file:gridool.dht.btree.Paged.java

/**
 * getPage returns the page specified by pageNum.
 *///  www  . j a va2s.  c o m
protected final Page getPage(long pageNum) throws IndexException {
    Page p = null;
    // if not check if it's already loaded in the page cache
    Reference<Page> ref = _pages.get(pageNum); // Check if required page is in the volatile cache
    if (ref != null) {
        p = ref.get();
    }
    if (p == null) {
        // if still not found we need to create it and add it to the page cache.
        p = new Page(pageNum);
        try {
            p.read(); // Load the page from disk if necessary
        } catch (IOException e) {
            throw new IndexException(e);
        }
        _pages.put(pageNum, new WeakReference<Page>(p));
    }
    return p;
}

From source file:com.android.launcher2.AsyncTaskCallback.java

public T get() {
    WeakReference<T> reference = mThreadLocal.get();
    T obj;//  w w w .j av a 2  s . c om
    if (reference == null) {
        obj = initialValue();
        mThreadLocal.set(new WeakReference<T>(obj));
        return obj;
    } else {
        obj = reference.get();
        if (obj == null) {
            obj = initialValue();
            mThreadLocal.set(new WeakReference<T>(obj));
        }
        return obj;
    }
}

From source file:android.support.design.widget.SheetBehavior.java

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    // First let the parent lay it out
    if (mState != STATE_DRAGGING && mState != STATE_SETTLING) {
        parent.onLayoutChild(child, layoutDirection);
    }//  www.  java 2  s  .  co m
    if (mSlideHelper == null) {
        mSlideHelper = createSlideHelper(mSlideModel);
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }

    // Offset the bottom sheet
    mSlideHelper.onLayoutChild(child);
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}

From source file:de.unwesen.web.DownloadCache.java

/***************************************************************************
 * Implementation/*from w  w  w .jav  a 2 s .  c  o m*/
 **/
// The cachePrevix parameter specifies a directory name under which cache
// content is stored.
public DownloadCache(Context context, String cachePrefix, Tunables tunables) {
    if (null == context || null == tunables) {
        Log.e(LTAG, "DownloadCache instanciated without context or tunables.");
        throw new IllegalArgumentException("DownloadCache instanciated without " + "context or tunables.");
    }
    mContext = new WeakReference<Context>(context);
    mTunables = tunables;
    mCachePrefix = cachePrefix;
    if (null == mCachePrefix) {
        // Simple default for the cache prefix.
        mCachePrefix = "cache";
    }

    mFetcher = new Fetcher();
    mFetcher.start();

    mLRUThread = new LRUThread();
    mLRUThread.start();
}

From source file:com.creativtrendz.folio.ui.FolioWebViewScroll.java

public void setListener(final Fragment fragment, final Listener listener, final int requestCodeFilePicker) {
    if (fragment != null) {
        mFragment = new WeakReference<>(fragment);
    } else {/*w w  w .  j  a v a 2 s  . c  o  m*/
        mFragment = null;
    }

    setListener(listener, requestCodeFilePicker);
}

From source file:net.sf.maltcms.chromaui.charts.overlay.Peak1DHeatmapOverlay.java

/**
 *
 * @return/*from  w  w w .j a  va  2 s  .co  m*/
 */
@Override
public Node createNodeDelegate() {
    Logger.getLogger(getClass().getName()).warning("Creating node delegate");
    Node node = null;
    if (nodeReference == null) {
        node = Charts.overlayNode(this);
        nodeReference = new WeakReference<>(node);
    } else {
        node = nodeReference.get();
        if (node == null) {
            node = Charts.overlayNode(this);
            nodeReference = new WeakReference<>(node);
        }
    }
    return node;
}

From source file:org.modelmapper.internal.util.TypeResolver.java

private static Map<TypeVariable<?>, Type> getTypeVariableMap(final Class<?> targetType) {
    Reference<Map<TypeVariable<?>, Type>> ref = typeVariableCache.get(targetType);
    Map<TypeVariable<?>, Type> map = ref != null ? ref.get() : null;

    if (map == null) {
        map = new HashMap<TypeVariable<?>, Type>();

        // Populate interfaces
        buildTypeVariableMap(targetType.getGenericInterfaces(), map);

        // Populate super classes and interfaces
        Type genericType = targetType.getGenericSuperclass();
        Class<?> type = targetType.getSuperclass();
        while (type != null && !Object.class.equals(type)) {
            if (genericType instanceof ParameterizedType)
                buildTypeVariableMap((ParameterizedType) genericType, map);
            buildTypeVariableMap(type.getGenericInterfaces(), map);

            genericType = type.getGenericSuperclass();
            type = type.getSuperclass();
        }/*w w  w. j  av a  2  s  .co m*/

        // Populate enclosing classes
        type = targetType;
        while (type.isMemberClass()) {
            genericType = type.getGenericSuperclass();
            if (genericType instanceof ParameterizedType)
                buildTypeVariableMap((ParameterizedType) genericType, map);

            type = type.getEnclosingClass();
        }

        typeVariableCache.put(targetType, new WeakReference<Map<TypeVariable<?>, Type>>(map));
    }

    return map;
}