Example usage for java.util WeakHashMap get

Introduction

In this page you can find the example usage for java.util WeakHashMap get.

Prototype

public V get(Object key) 

Source Link

Document

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

Usage

From source file:Main.java

public static void main(String[] args) {
    WeakHashMap<String, String> weakHashMap = new WeakHashMap<String, String>();

    weakHashMap.put("1", "first");
    weakHashMap.put("2", "two");
    weakHashMap.put("3", "from java2s.com");

    // check existence of value for key 2
    System.out.println("Checking value for key 2");
    System.out.println(weakHashMap.get("2"));
}

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From source file:com.benefit.buy.library.http.query.callback.BitmapAjaxCallback.java

@Override
public final void callback(String url, Bitmap bm, AjaxStatus status) {
    ImageView firstView = v.get();
    WeakHashMap<ImageView, BitmapAjaxCallback> ivs = queueMap.remove(url);
    //check if view queue already contains first view 
    if ((ivs == null) || !ivs.containsKey(firstView)) {
        checkCb(this, url, firstView, bm, status);
    }//from   w w w. j  a va2s.  co  m
    if (ivs != null) {
        Set<ImageView> set = ivs.keySet();
        for (ImageView view : set) {
            BitmapAjaxCallback cb = ivs.get(view);
            cb.status = status;
            checkCb(cb, url, view, bm, status);
        }
    }
}

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From source file:com.appbase.androidquery.callback.BitmapAjaxCallback.java

@Override
public final void callback(String url, Bitmap bm, AjaxStatus status) {

    ImageView firstView = v.get();
    WeakHashMap<ImageView, BitmapAjaxCallback> ivs = queueMap.remove(url);

    //check if view queue already contains first view 
    if (ivs == null || !ivs.containsKey(firstView)) {
        checkCb(this, url, firstView, bm, status);
    }//from  w  ww  . j  av  a  2 s  .  c  om

    if (ivs != null) {

        Set<ImageView> set = ivs.keySet();

        for (ImageView view : set) {
            BitmapAjaxCallback cb = ivs.get(view);
            cb.status = status;
            checkCb(cb, url, view, bm, status);
        }

    }

}

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From source file:org.cellprofiler.preferences.CellProfilerPreferences.java

/**
 * Lookup or create a CellProfilerPreferences node for a given path.
 * @param delegate//from   www.j a va  2  s .  co m
 * @param map
 * @return
 */
static private CellProfilerPreferences retrieveNode(String path,
        WeakHashMap<String, CellProfilerPreferences> map) {
    synchronized (map) {
        CellProfilerPreferences result = map.get(path);
        if (result == null) {
            CellProfilerPreferences root = map.get("/");
            final Preferences delegate = root.delegate.node(path);
            final int lastSlash = path.lastIndexOf("/");
            CellProfilerPreferences parent = null;
            if (lastSlash == 0) {
                parent = root;
            } else {
                parent = retrieveNode(path.substring(0, lastSlash), map);
            }
            result = new CellProfilerPreferences(parent, delegate, map);
            map.put(path, result);
        }
        return result;
    }
}

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From source file:org.compass.gps.device.hibernate.embedded.CompassEventListener.java

private CompassHolder getCompassHolder(Configuration cfg) {
    WeakHashMap<Configuration, CompassHolder> contextMap = contexts.get();
    if (contextMap == null) {
        contextMap = new WeakHashMap<Configuration, CompassHolder>(2);
        contexts.set(contextMap);/*from w w w  . ja va2 s. c om*/
    }
    CompassHolder compassHolder = contextMap.get(cfg);
    if (compassHolder == null) {
        compassHolder = initCompassHolder(cfg);
        if (compassHolder != null) {
            if (log.isDebugEnabled()) {
                log.debug("Regsitering new Compass Holder [" + compassHolder + "]");
            }
            contextMap.put(cfg, compassHolder);
        }
    }
    return compassHolder;
}

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From source file:org.eclipse.wb.internal.core.utils.reflect.ReflectionUtils.java

private static IsSuccessorResult isSuccessorOf_checkCache(Class<?> clazz, String requiredClass) {
    WeakHashMap<Class<?>, IsSuccessorResult> classes = m_isSuccessorOfCache.get(requiredClass);
    if (classes != null) {
        return classes.get(clazz);
    }//from w  ww  .  j  a va2 s . c  o  m
    return IsSuccessorResult.UNKNOWN;
}

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