Example usage for java.util WeakHashMap WeakHashMap

Introduction

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

Prototype

public WeakHashMap()

Source Link

Document

Constructs a new, empty WeakHashMap with the default initial capacity (16) and load factor (0.75).

Usage

From source file:WeakHashSet.java

/** 
 * Constructs a new empty WeakHashSet with default values passed the the backing
 * store.//from w  ww . ja  va  2  s. c  o m
 *
 * @see java.util.WeakHashMap#WeakHashMap()
 */
public WeakHashSet() {
    backingStore = new WeakHashMap();
}

From source file:org.xchain.framework.scanner.ScannerLifecycle.java

public ScannerLifecycle() {
    protocolMap.put("file", new FileProtocolScanner());
    protocolMap.put("jar", new JarProtocolScanner());

    // define the vfszip, vfsfile, and vfsmemory protocols if the jboss virtual file system classes are on the classpath.
    if (isVfsDefined()) {
        protocolMap.put("vfszip", new VfsProtocolScanner());
        protocolMap.put("vfsfile", new VfsProtocolScanner());
        protocolMap.put("vfsmemory", new VfsProtocolScanner());
    }/*w  w w  . j  a  v a2 s.  com*/
    if (isZipDefined()) {
        protocolMap.put("zip", new ZipProtocolScanner());
    }
    if (isBundleDefined()) {
        protocolMap.put("bundle", new BundleProtocolScanner());
        protocolMap.put("bundleresource", new BundleProtocolScanner());
    }

    if (MEMOIZE_SCAN_NODE) {
        cache = Collections.synchronizedMap(new WeakHashMap<ClassLoader, Map<RootUrlLocator, ScanNode>>());
    }
}

From source file:org.xflatdb.xflat.db.ConvertingTable.java

ConvertingTable(Class<T> type, String name) {
    super(name);//from ww w. ja  va2  s .  co  m

    this.tableType = type;

    this.accessor = IdAccessor.forClass(type);
    if (!this.accessor.hasId()) {
        //we need to keep a reference to the ID in a weak cache
        idMap = Collections.synchronizedMap(new WeakHashMap<T, String>());
    } else {
        idMap = null;
    }

}

From source file:org.omnaest.utils.structure.map.decorator.CaseinsensitiveMapDecorator.java

/**
 * @see CaseinsensitiveMapDecorator//from  w w w  .  ja  v a  2  s.c o m
 * @param map
 * @param useCacheForKeys
 */
public CaseinsensitiveMapDecorator(Map<String, V> map, boolean useCacheForKeys) {
    super(map);
    this.sourceKeyToTargetKeyTranslationMap = useCacheForKeys
            ? MapUtils.lockedByReentrantLock(new WeakHashMap<String, String>())
            : null;
}

From source file:org.apache.ambari.server.orm.dao.ConfigGroupHostMappingDAO.java

private void populateCache() {

    if (!cacheLoaded) {
        gl.writeLock().lock();/*from   w w w .ja  v  a2  s . c  o  m*/
        try {
            if (configGroupHostMappingByHost == null) {
                configGroupHostMappingByHost = new WeakHashMap<String, Set<ConfigGroupHostMapping>>();

                TypedQuery<ConfigGroupHostMappingEntity> query = entityManagerProvider.get().createQuery(
                        "SELECT entity FROM ConfigGroupHostMappingEntity entity",
                        ConfigGroupHostMappingEntity.class);

                List<ConfigGroupHostMappingEntity> configGroupHostMappingEntities = daoUtils.selectList(query);

                for (ConfigGroupHostMappingEntity configGroupHostMappingEntity : configGroupHostMappingEntities) {

                    Set<ConfigGroupHostMapping> setByHost = configGroupHostMappingByHost
                            .get((configGroupHostMappingEntity.getHostname()));

                    if (setByHost == null) {
                        setByHost = new HashSet<ConfigGroupHostMapping>();
                        configGroupHostMappingByHost.put(configGroupHostMappingEntity.getHostname(), setByHost);
                    }

                    ConfigGroupHostMapping configGroupHostMapping = buildConfigGroupHostMapping(
                            configGroupHostMappingEntity);
                    setByHost.add(configGroupHostMapping);
                }
            }
        } finally {
            gl.writeLock().unlock();
        }

        cacheLoaded = true;

    }

}

From source file:org.grouplens.grapht.InjectionContainer.java

private InjectionContainer(CachePolicy dft, LifecycleManager mgr) {
    defaultCachePolicy = dft;/*from   w ww. ja  v a2s.c o  m*/
    providerCache = new WeakHashMap<DAGNode<Component, Dependency>, Instantiator>();
    manager = mgr;
}

From source file:com.emc.ecs.sync.filter.GladinetMappingFilter.java

public GladinetMappingFilter() {
    dirCache = Collections.synchronizedMap(new WeakHashMap<String, String>());
    idCache = Collections.synchronizedMap(new WeakHashMap<String, ObjectId>());
    random = new Random();
    baseDir = "";
}

From source file:org.kepler.gui.ViewManager.java

/**
 * Constructor.//from  ww  w.  ja  v a  2  s.c  o  m
 */
public ViewManager() {
    _viewPanes = new Vector<ViewPane>();
    _viewAreas = new WeakHashMap<TableauFrame, JPanel>();
    _viewComboBoxes = new WeakHashMap<TableauFrame, JComboBox>();
}

From source file:org.nabucco.alfresco.enhScriptEnv.common.script.batch.DefaultFacadeFactory.java

/**
 * {@inheritDoc}/*  w w  w.ja va  2s. co  m*/
 */
@Override
public Scriptable toFacadedObject(final Scriptable obj, final Scriptable referenceScope,
        final String accessName) {
    final Scriptable facadedObject;

    if (obj != null && !(obj instanceof ObjectFacadingDelegator)) {
        final Scriptable threadLocalFacadedObj;
        final Map<Scriptable, WeakReference<Scriptable>> facadeByRealObject = this.facadeByRealObject.get();
        if (facadeByRealObject != null) {
            final WeakReference<Scriptable> threadLocalFacadedObjRef = facadeByRealObject.get(obj);
            threadLocalFacadedObj = threadLocalFacadedObjRef != null ? threadLocalFacadedObjRef.get() : null;
        } else {
            threadLocalFacadedObj = null;
            this.facadeByRealObject.set(new WeakHashMap<Scriptable, WeakReference<Scriptable>>());
        }

        if (threadLocalFacadedObj == null) {
            Map<Scriptable, WeakReference<Scriptable>> facadeByRealObjectAndReferenceScope = this.facadeByRealObjectAndReferenceScope
                    .get(referenceScope);
            if (facadeByRealObjectAndReferenceScope == null) {
                synchronized (this.facadeByRealObjectAndReferenceScope) {
                    facadeByRealObjectAndReferenceScope = this.facadeByRealObjectAndReferenceScope
                            .get(referenceScope);
                    if (facadeByRealObjectAndReferenceScope == null) {
                        facadeByRealObjectAndReferenceScope = new WeakHashMap<Scriptable, WeakReference<Scriptable>>();
                        this.facadeByRealObjectAndReferenceScope.put(referenceScope,
                                facadeByRealObjectAndReferenceScope);
                    }
                }
            }

            WeakReference<Scriptable> globalFacadedObjectRef = facadeByRealObjectAndReferenceScope.get(obj);
            Scriptable globalFacadedObject = globalFacadedObjectRef != null ? globalFacadedObjectRef.get()
                    : null;
            if (globalFacadedObject == null) {
                synchronized (facadeByRealObjectAndReferenceScope) {
                    globalFacadedObjectRef = facadeByRealObjectAndReferenceScope.get(obj);
                    globalFacadedObject = globalFacadedObjectRef != null ? globalFacadedObjectRef.get() : null;
                    if (globalFacadedObject == null) {
                        globalFacadedObject = this.toFacadedObjectImpl(obj, referenceScope, accessName);
                        facadeByRealObjectAndReferenceScope.put(obj,
                                new WeakReference<Scriptable>(globalFacadedObject));
                    }
                }
            }

            facadedObject = globalFacadedObject;

            this.facadeByRealObject.get().put(obj, new WeakReference<Scriptable>(facadedObject));
        } else {
            facadedObject = threadLocalFacadedObj;
        }
    } else {
        facadedObject = obj;
    }

    return facadedObject;
}

From source file:org.jhotdraw.samples.svg.figures.SVGImage.java

protected Object readResolve() throws ObjectStreamException {
    super.readResolve();
    this.scaledImages = new WeakHashMap<Double, BufferedImage>();
    return this;
}