Example usage for java.lang.ref SoftReference SoftReference

Introduction

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

Prototype

public SoftReference(T referent)

Source Link

Document

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

Usage

From source file:com.gdo.sql.slot.SQLSlot.java

@Override
protected StencilIterator<StclContext, PStcl> getStencilsList(StclContext stclContext,
        StencilCondition<StclContext, PStcl> cond, PSlot<StclContext, PStcl> self) {

    // should be initialized before used
    if (!initialize(stclContext, self)) {
        String msg = logWarn(stclContext, "Cannot initialize slot %s", self);
        return StencilUtils.<StclContext, PStcl>iterator(Result.error(msg));
    }/*from  w  ww  .  j  a  v a  2 s .c  om*/

    // if the list was already created for the same stencil context and
    // without any condition
    //synchronized (this) {
    //    if ((_stencil_context_uid == stclContext.getId() || _read_only) && _stencil_context_map != null) {
    //        return StencilUtils.<StclContext, PStcl> iterator(stclContext, _stencil_context_map.get().clone(), cond, self);
    //    }
    //}

    // creates the stencil list
    SQLCursor cursor = getCursor(stclContext, self);
    List<IKey> keys = getKeys(stclContext, cond, self);
    List<PStcl> stencils = new Vector<PStcl>(keys.size());
    for (IKey key : keys) {
        PStcl stencil = new PStcl(stclContext, self, key, cursor);
        stencils.add(stencil);
    }

    // returns the iterator (save for optimization on complete list)
    StencilIterator<StclContext, PStcl> map = new ListIterator<StclContext, PStcl>(stencils);
    if (cond == null) {
        _stencil_context_uid = stclContext.getId();
        _stencil_context_map = new SoftReference<>(map);
    }
    return map;
}

From source file:net.sourceforge.fenixedu.domain.Degree.java

private static void loadCache() {
    synchronized (degrees) {
        degrees.clear();/*from  www.j  a  v  a  2 s.com*/
        for (final Degree degree : Degree.readNotEmptyDegrees()) {
            degrees.put(degree.getSigla().toLowerCase(), new SoftReference<Degree>(degree));
        }
    }
}

From source file:net.sourceforge.fenixedu.domain.Degree.java

private static void updateCache(final Degree degree, final String newLowerCaseSigla) {
    final String currentLowerCaseSigla = degree.getSigla() != null ? degree.getSigla().toLowerCase()
            : StringUtils.EMPTY;/*ww w  .j  a  va2  s  .  c  om*/
    synchronized (degrees) {
        degrees.remove(currentLowerCaseSigla);
        degrees.put(newLowerCaseSigla, new SoftReference<Degree>(degree));
    }
}

From source file:org.apache.sysml.runtime.controlprogram.caching.CacheableData.java

/**
 * Creates a new cache soft reference to the currently
 * referenced cache block.  // ww  w.  j  a  v a  2 s  .  c  om
 */
protected void createCache() {
    _cache = new SoftReference<T>(_data);
}

From source file:com.android.contacts.common.ContactPhotoManager.java

/**
 * If necessary, decodes bytes stored in the holder to Bitmap.  As long as the
 * bitmap is held either by {@link #mBitmapCache} or by a soft reference in
 * the holder, it will not be necessary to decode the bitmap.
 *///from ww w  .j  ava 2 s  .  c  om
private static void inflateBitmap(BitmapHolder holder, int requestedExtent) {
    final int sampleSize = BitmapUtil.findOptimalSampleSize(holder.originalSmallerExtent, requestedExtent);
    byte[] bytes = holder.bytes;
    if (bytes == null || bytes.length == 0) {
        return;
    }

    if (sampleSize == holder.decodedSampleSize) {
        // Check the soft reference.  If will be retained if the bitmap is also
        // in the LRU cache, so we don't need to check the LRU cache explicitly.
        if (holder.bitmapRef != null) {
            holder.bitmap = holder.bitmapRef.get();
            if (holder.bitmap != null) {
                return;
            }
        }
    }

    try {
        Bitmap bitmap = BitmapUtil.decodeBitmapFromBytes(bytes, sampleSize);

        // TODO: As a temporary workaround while framework support is being added to
        // clip non-square bitmaps into a perfect circle, manually crop the bitmap into
        // into a square if it will be displayed as a thumbnail so that it can be cropped
        // into a circle.
        final int height = bitmap.getHeight();
        final int width = bitmap.getWidth();

        // The smaller dimension of a scaled bitmap can range from anywhere from 0 to just
        // below twice the length of a thumbnail image due to the way we calculate the optimal
        // sample size.
        if (height != width && Math.min(height, width) <= mThumbnailSize * 2) {
            final int dimension = Math.min(height, width);
            bitmap = ThumbnailUtils.extractThumbnail(bitmap, dimension, dimension);
        }
        // make bitmap mutable and draw size onto it
        if (DEBUG_SIZES) {
            Bitmap original = bitmap;
            bitmap = bitmap.copy(bitmap.getConfig(), true);
            original.recycle();
            Canvas canvas = new Canvas(bitmap);
            Paint paint = new Paint();
            paint.setTextSize(16);
            paint.setColor(Color.BLUE);
            paint.setStyle(Style.FILL);
            canvas.drawRect(0.0f, 0.0f, 50.0f, 20.0f, paint);
            paint.setColor(Color.WHITE);
            paint.setAntiAlias(true);
            canvas.drawText(bitmap.getWidth() + "/" + sampleSize, 0, 15, paint);
        }

        holder.decodedSampleSize = sampleSize;
        holder.bitmap = bitmap;
        holder.bitmapRef = new SoftReference<Bitmap>(bitmap);
        if (DEBUG) {
            Log.d(TAG, "inflateBitmap " + btk(bytes.length) + " -> " + bitmap.getWidth() + "x"
                    + bitmap.getHeight() + ", " + btk(bitmap.getByteCount()));
        }
    } catch (OutOfMemoryError e) {
        // Do nothing - the photo will appear to be missing
    }
}

From source file:com.android.contacts.common.ContactPhotoManager.java

@Override
public void cacheBitmap(Uri photoUri, Bitmap bitmap, byte[] photoBytes) {
    final int smallerExtent = Math.min(bitmap.getWidth(), bitmap.getHeight());
    // We can pretend here that the extent of the photo was the size that we originally
    // requested/*w  ww.j  av a 2 s . c o m*/
    Request request = Request.createFromUri(photoUri, smallerExtent, false /* darkTheme */,
            false /* isCircular */ , DEFAULT_AVATAR);
    BitmapHolder holder = new BitmapHolder(photoBytes, smallerExtent);
    holder.bitmapRef = new SoftReference<Bitmap>(bitmap);
    mBitmapHolderCache.put(request.getKey(), holder);
    mBitmapHolderCacheAllUnfresh = false;
    mBitmapCache.put(request.getKey(), bitmap);
}

From source file:com.ibm.bi.dml.runtime.controlprogram.caching.MatrixObject.java

/**
 * 
 */
private void createCache() {
    _cache = new SoftReference<MatrixBlock>(_data);
}

From source file:edu.ku.brc.specify.tasks.QueryTask.java

/**
 * Constructs tableTree and tableTreeHash members.
 *///from w  w  w.  ja v a2 s  . c  o m
protected void bldTableTrees() {
    if (tableTree == null || tableTree.get() == null || needToRebuildTableTree()) {
        tableTreeHash = null;
        tableTree = new SoftReference<TableTree>(readTables());
    }
    if (tableTreeHash == null || tableTreeHash.get() == null || needToRebuildTableTree()) {
        tableTreeHash = new SoftReference<Hashtable<String, TableTree>>(buildTableTreeHash(tableTree.get()));
    }
    configurationHasChanged.set(false);
}

From source file:edu.ku.brc.ui.UIRegistry.java

/**
 * Reads in the disciplines file (is loaded when the class is loaded).
 * @return Reads in the disciplines file (is loaded when the class is loaded).
 *//*from  w  w  w  . jav a  2s .co  m*/
public static BufferedImage getGlassPaneBufferedImage(final int width, final int height) {
    BufferedImage bufImg = null;

    if (glassPaneBufferedImageSR != null) {
        bufImg = glassPaneBufferedImageSR.get();
    }

    if (bufImg != null) {
        if (bufImg.getWidth() != width && bufImg.getHeight() != height) {
            bufImg = null;
        }
    }

    if (bufImg == null) {
        glassPaneBufferedImageSR = new SoftReference<BufferedImage>(
                new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB));
    }

    return glassPaneBufferedImageSR.get();
}