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:ch.entwine.weblounge.common.impl.content.movie.LazyMovieResourceImpl.java

/**
 * Loads the audio visual header only.//from   ww  w.ja  v  a2s  .c om
 */
protected void loadAudioVisualHeader() {
    try {

        // Get a hold of the audio visual reader
        MovieResourceReader reader = (readerRef != null) ? readerRef.get() : null;
        if (reader == null) {
            reader = new MovieResourceReader();
            readerRef = new WeakReference<MovieResourceReader>(reader);
        }

        // If no separate header was given, then we need to load the whole thing
        // instead.
        if (headerXml == null) {
            loadAudioVisual();
            return;
        }

        // Load the audio visual header
        audioVisual = reader.readHeader(IOUtils.toInputStream(headerXml, "utf-8"), uri.getSite());
        isHeaderLoaded = true;
        if (isHeaderLoaded && isBodyLoaded)
            cleanupAfterLoading();
        else
            headerXml = null;

    } catch (Throwable e) {
        logger.error("Failed to lazy-load header of {}", uri);
        throw new IllegalStateException(e);
    }
}

From source file:com.berniesanders.fieldthebern.views.MapScreenView.java

private void injectSelf(Context context) {
    //This is a hack to safely get a reference to the activity.
    //Flow is internally already passing around the references in a private Map<Path,Context>
    //So we use a little hacky reflection tool to steal the activity ref
    //but hold it in a weak ref
    //TODO: we could probably change this to a "controller"
    PathContext pathContext = (PathContext) context;
    Map<Path, Context> contextMap = new HashMap<>();
    try {/*w w  w  . ja  v a2 s  . co  m*/
        contextMap = (Map<Path, Context>) FieldUtils.readDeclaredField(context, "contexts", true);
    } catch (IllegalAccessException e) {
        Timber.e(e, "error reading path contexts...");
        e.printStackTrace();
    }

    for (Context ctx : contextMap.values()) {
        if (ctx instanceof Activity) {
            Timber.v("We found an activity!");
            activityWeakReference = new WeakReference<>((Activity) ctx);
        }
    }

    DaggerService.<MapScreen.Component>getDaggerComponent(context, DaggerService.DAGGER_SERVICE).inject(this);
}

From source file:com.puppycrawl.tools.checkstyle.filters.SuppressionCommentFilter.java

/**
 * Set the FileContents for this filter.
 * @param fileContents the FileContents for this filter.
 *///w w  w .j  a  va  2  s  .  com
public void setFileContents(FileContents fileContents) {
    fileContentsReference = new WeakReference<>(fileContents);
}

From source file:co.com.parsoniisolutions.custombottomsheetbehavior.lib.behaviors.BackdropBottomSheetBehavior.java

/**
 * Look into the CoordiantorLayout for the {@link BottomSheetBehaviorGoogleMapsLike}
 * @param coordinatorLayout with app:layout_behavior= {@link BottomSheetBehaviorGoogleMapsLike}
 *//*w  ww. ja v a2  s .c  o  m*/
private void getBottomSheetBehavior(@NonNull CoordinatorLayout coordinatorLayout) {

    for (int i = 0; i < coordinatorLayout.getChildCount(); i++) {
        View child = coordinatorLayout.getChildAt(i);

        if (child instanceof NestedScrollingParent) {

            try {
                BottomSheetBehaviorGoogleMapsLike temp = BottomSheetBehaviorGoogleMapsLike.from(child);
                mBottomSheetBehaviorRef = new WeakReference<>(temp);
                break;
            } catch (IllegalArgumentException e) {
            }
        }
    }
}

From source file:ch.entwine.weblounge.common.impl.content.page.LazyPageImpl.java

/**
 * Loads the page header only.//ww  w .j  a  v  a 2s . c  o  m
 */
protected void loadPageHeader() {
    try {

        // Get a hold of the page reader
        PageReader reader = (readerRef != null) ? readerRef.get() : null;
        if (reader == null) {
            reader = new PageReader();
            readerRef = new WeakReference<PageReader>(reader);
        }

        // If no separate header was given, then we need to load the whole thing
        // instead.
        if (headerXml == null) {
            loadPage();
            return;
        }

        // Load the page header
        page = reader.readHeader(IOUtils.toInputStream(headerXml, "utf-8"), uri.getSite());
        isHeaderLoaded = true;
        if (isHeaderLoaded && isBodyLoaded)
            cleanupAfterLoading();
        else
            headerXml = null;

    } catch (Throwable e) {
        logger.error("Failed to lazy-load header of {}", uri);
        throw new IllegalStateException(e);
    }
}

From source file:com.google.blockly.model.BlockFactory.java

/**
 * Creates a block of the specified type using one of the master blocks known to this factory.
 * If the prototypeName is not one of the known block types null will be returned instead.
 *
 * @param prototypeName The name of the block type to create.
 * @param uuid The id of the block if loaded from XML; null otherwise.
 *
 * @return A new block of that type or null.
 *///from w  ww.java2 s  .  c  o m
public Block obtainBlock(String prototypeName, @Nullable String uuid) {
    // First search for any existing instance
    Block block;
    if (uuid != null) {
        WeakReference<Block> ref = mBlockRefs.get(uuid);
        if (ref != null) {
            block = ref.get();
            if (block != null) {
                throw new IllegalArgumentException(
                        "Block with given UUID \"" + uuid + "\" already exists. Duplicate UUIDs not allowed.");
            }
        }
    }

    // Existing instance not found.  Constructing a new one.
    if (!mBlockTemplates.containsKey(prototypeName)) {
        Log.w(TAG, "Block " + prototypeName + " not found.");
        return null;
    }
    Block.Builder builder = new Block.Builder(mBlockTemplates.get(prototypeName));
    if (uuid != null) {
        builder.setUuid(uuid);
    }
    block = builder.build();
    mBlockRefs.put(block.getId(), new WeakReference<Block>(block));
    return block;
}

From source file:ch.entwine.weblounge.common.impl.content.page.PageReader.java

/**
 * This method is called when a <code>Page</code> object is instantiated.
 * /*from w w  w. j  a va  2s  .  c o m*/
 * @param is
 *          the xml input stream
 * @param site
 *          the page's site
 * @throws ParserConfigurationException
 *           if the SAX parser setup failed
 * @throws IOException
 *           if reading the input stream fails
 * @throws SAXException
 *           if an error occurs while parsing
 */
public PageImpl readHeader(InputStream is, Site site)
        throws SAXException, IOException, ParserConfigurationException {
    if (page == null) {
        page = new PageImpl(new PageURIImpl(site, "/"));
    }
    readHeader = true;
    readBody = false;
    SAXParser parser = parserRef.get();
    if (parser == null) {
        parser = parserFactory.newSAXParser();
        parserRef = new WeakReference<SAXParser>(parser);
    }
    parser.parse(is, this);
    return page;
}

From source file:com.gh.bmd.jrt.android.v4.core.DefaultObjectContextRoutineBuilder.java

/**
 * Constructor./*from w  w w.j ava2  s .c  o m*/
 *
 * @param context     the routine context.
 * @param targetClass the target object class.
 * @throws java.lang.NullPointerException if any of the parameter is null.
 */
@SuppressWarnings("ConstantConditions")
private DefaultObjectContextRoutineBuilder(@Nonnull final Object context, @Nonnull final Class<?> targetClass) {

    if (context == null) {

        throw new NullPointerException("the routine context must not be null");
    }

    mContext = new WeakReference<Object>(context);
    mTargetClass = targetClass;
    final HashSet<String> bindingSet = new HashSet<String>();

    for (final Method method : targetClass.getMethods()) {

        final Bind annotation = method.getAnnotation(Bind.class);

        if (annotation != null) {

            final String name = annotation.value();

            if (bindingSet.contains(name)) {

                throw new IllegalArgumentException(
                        "the name '" + name + "' has already been used to identify a different" + " method");
            }

            bindingSet.add(name);
        }
    }
}

From source file:edu.unc.lib.dl.cdr.services.model.FailedEnhancementMap.java

/**
 * Retrieves the FailedEnhancementEntry matching pid and service name, either from the cache or from disk.
 * //from w  ww .jav a 2s.  c  om
 * @param pid
 * @param serviceName
 * @return
 */
public synchronized FailedEnhancementEntry get(String pid, String serviceName) {
    Map<String, WeakReference<FailedEnhancementEntry>> cache = this.pidToService.get(pid);
    // Either the enhancement hasn't failed or the map is out of sync, lets be optimistic and say its not there
    if (cache == null)
        return null;
    WeakReference<FailedEnhancementEntry> entryRef = cache.get(serviceName);
    if (entryRef != null && entryRef.get() != null)
        return entryRef.get();

    // Entry isn't in the cache, retrieve it from the file system
    FailedEnhancementEntry entry;
    try {
        entry = this.deserializeFailure(pid, serviceName);
    } catch (IOException e) {
        return null;
    }
    entryRef = new WeakReference<FailedEnhancementEntry>(entry);
    cache.put(serviceName, entryRef);

    this.serviceToPID.get(serviceName).put(pid, entryRef);
    return entry;
}

From source file:ch.entwine.weblounge.common.impl.content.AbstractResourceReaderImpl.java

/**
 * This method is called to read the head section of a resource.
 * //from   w w  w. j av  a 2  s  .co  m
 * @param is
 *          the xml input stream
 * @param site
 *          the site
 * @throws ParserConfigurationException
 *           if the SAX parser setup failed
 * @throws IOException
 *           if reading the input stream fails
 * @throws SAXException
 *           if an error occurs while parsing
 */
public T readHeader(InputStream is, Site site) throws SAXException, IOException, ParserConfigurationException {
    if (resource == null) {
        resource = createResource(site);
    }
    readHeader = true;
    readBody = false;
    SAXParser parser = parserRef.get();
    if (parser == null) {
        parser = parserFactory.newSAXParser();
        parserRef = new WeakReference<SAXParser>(parser);
    }
    parser.parse(is, this);
    return resource;
}