Examples of org.apache.commons.collections.map.ReferenceMap

Package org.apache.commons.collections.map

Examples of org.apache.commons.collections.map.ReferenceMap

org.apache.commons.collections.map.ReferenceMap
sun.com/j2se/1.4/docs/api/java/util/WeakHashMap.html"> WeakHashMap. However, you can also specify hard keys and weak values, or any other combination. The default constructor uses hard keys and soft values, providing a memory-sensitive cache.
This map is similar to {@link org.apache.commons.collections.map.ReferenceIdentityMap ReferenceIdentityMap}. It differs in that keys and values in this class are compared using equals().
This {@link Map} implementation does not allow null elements.Attempting to add a null key or value to the map will raise a NullPointerException.
This implementation is not synchronized. You can use {@link java.util.Collections#synchronizedMap} to provide synchronized access to a ReferenceMap. Remember that synchronization will not stop the garbage collecter removing entries.
All the available iterators can be reset back to the start by casting to ResettableIterator and calling reset().
NOTE: As from Commons Collections 3.1 this map extends AbstractReferenceMap (previously it extended AbstractMap). As a result, the implementation is now extensible and provides a MapIterator. @see java.lang.ref.Reference @since Commons Collections 3.0 (previously in main package v2.1) @version $Revision: 1.13 $ $Date: 2004/04/27 21:35:23 $ @author Paul Jack @author Stephen Colebourne

  private Map<String, IResourceBase>       resources;


  @SuppressWarnings("unchecked")
  private ResourceManager() {
    // resources = new HashMap<String, IResource>();
    resources = new ReferenceMap(AbstractReferenceMap.SOFT,
        AbstractReferenceMap.SOFT, true);
    random = new SecureRandom();
  }

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     * 
     * @since 3.0
     * @return a map with hard referenced keys and weak referenced values.
     */
    static Map<Object, Persistent> createObjectMap() {
        return new ReferenceMap(AbstractReferenceMap.HARD, AbstractReferenceMap.WEAK);
    }

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            if (_oldSerializedViews == null && context != null)
            {
                String cacheMode = getCacheOldViewsInSessionMode(context); 
                if (CACHE_OLD_VIEWS_IN_SESSION_MODE_WEAK.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.WEAK, AbstractReferenceMap.WEAK, true);
                }
                else if (CACHE_OLD_VIEWS_IN_SESSION_MODE_SOFT_WEAK.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.SOFT, AbstractReferenceMap.WEAK, true);
                }
                else if (CACHE_OLD_VIEWS_IN_SESSION_MODE_SOFT.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.SOFT, AbstractReferenceMap.SOFT, true);
                }
                else if (CACHE_OLD_VIEWS_IN_SESSION_MODE_HARD_SOFT.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.HARD, AbstractReferenceMap.SOFT);
                }
            }
            
            return _oldSerializedViews;
        }

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            if (_oldSerializedViews == null && context != null)
            {
                String cacheMode = getCacheOldViewsInSessionMode(context); 
                if (CACHE_OLD_VIEWS_IN_SESSION_MODE_WEAK.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.WEAK, AbstractReferenceMap.WEAK, true);
                }
                else if (CACHE_OLD_VIEWS_IN_SESSION_MODE_SOFT_WEAK.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.SOFT, AbstractReferenceMap.WEAK, true);
                }
                else if (CACHE_OLD_VIEWS_IN_SESSION_MODE_SOFT.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.SOFT, AbstractReferenceMap.SOFT, true);
                }
                else if (CACHE_OLD_VIEWS_IN_SESSION_MODE_HARD_SOFT.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.HARD, AbstractReferenceMap.SOFT);
                }
            }
            
            return _oldSerializedViews;
        }

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            if (_oldSerializedViews == null && context != null)
            {
                String cacheMode = getCacheOldViewsInSessionMode(context); 
                if (CACHE_OLD_VIEWS_IN_SESSION_MODE_WEAK.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.WEAK, AbstractReferenceMap.WEAK, true);
                }
                else if (CACHE_OLD_VIEWS_IN_SESSION_MODE_SOFT_WEAK.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.SOFT, AbstractReferenceMap.WEAK, true);
                }
                else if (CACHE_OLD_VIEWS_IN_SESSION_MODE_SOFT.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.SOFT, AbstractReferenceMap.SOFT, true);
                }
                else if (CACHE_OLD_VIEWS_IN_SESSION_MODE_HARD_SOFT.equals(cacheMode))
                {
                    _oldSerializedViews = new ReferenceMap(AbstractReferenceMap.HARD, AbstractReferenceMap.SOFT);
                }
            }
            
            return _oldSerializedViews;
        }

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   throws NamingException
   {
      Context initialContext = new InitialContext(  );
      if ( m_resourceIsPersistent )
      {
         s_resources = new ReferenceMap( ReferenceMap.HARD, ReferenceMap.SOFT, true );
         initCachePolicy( initialContext );
      }
      else
      {
         s_resources = new HashMap(  );

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  public StatefulPersistenceContext(SessionImplementor session) {
    this.session = session;


    entitiesByKey = new HashMap( INIT_COLL_SIZE );
    entitiesByUniqueKey = new HashMap( INIT_COLL_SIZE );
    proxiesByKey = new ReferenceMap( ReferenceMap.HARD, ReferenceMap.WEAK );
    entitySnapshotsByKey = new HashMap( INIT_COLL_SIZE );


    entityEntries = IdentityMap.instantiateSequenced( INIT_COLL_SIZE );
    collectionEntries = IdentityMap.instantiateSequenced( INIT_COLL_SIZE );
    collectionsByKey = new HashMap( INIT_COLL_SIZE );

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        rtn.entitiesByUniqueKey.put( EntityUniqueKey.deserialize( ois, session ), ois.readObject() );
      }


      count = ois.readInt();
      log.trace( "staring deserialization of [" + count + "] proxiesByKey entries" );
      rtn.proxiesByKey = new ReferenceMap( ReferenceMap.HARD, ReferenceMap.WEAK, count < INIT_COLL_SIZE ? INIT_COLL_SIZE : count, .75f );
      for ( int i = 0; i < count; i++ ) {
        EntityKey ek = EntityKey.deserialize( ois, session );
        Object proxy = ois.readObject();
        if ( proxy instanceof HibernateProxy ) {
          ( ( HibernateProxy ) proxy ).getHibernateLazyInitializer().setSession( session );

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  public StatefulPersistenceContext(SessionImplementor session) {
    this.session = session;


    entitiesByKey = new HashMap( INIT_COLL_SIZE );
    entitiesByUniqueKey = new HashMap( INIT_COLL_SIZE );
    proxiesByKey = new ReferenceMap( ReferenceMap.HARD, ReferenceMap.WEAK );
    entitySnapshotsByKey = new HashMap( INIT_COLL_SIZE );


    entityEntries = IdentityMap.instantiateSequenced( INIT_COLL_SIZE );
    collectionEntries = IdentityMap.instantiateSequenced( INIT_COLL_SIZE );
    collectionsByKey = new HashMap( INIT_COLL_SIZE );

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        rtn.entitiesByUniqueKey.put( EntityUniqueKey.deserialize( ois, session ), ois.readObject() );
      }


      count = ois.readInt();
      log.trace( "staring deserialization of [" + count + "] proxiesByKey entries" );
      rtn.proxiesByKey = new ReferenceMap( ReferenceMap.HARD, ReferenceMap.WEAK, count < INIT_COLL_SIZE ? INIT_COLL_SIZE : count, .75f );
      for ( int i = 0; i < count; i++ ) {
        EntityKey ek = EntityKey.deserialize( ois, session );
        Object proxy = ois.readObject();
        if ( proxy instanceof HibernateProxy ) {
          ( ( HibernateProxy ) proxy ).getHibernateLazyInitializer().setSession( session );

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