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

Package org.apache.commons.collections.map

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

org.apache.commons.collections.map.ReferenceMap
A MapEntry implementation for the map.
If getKey() or getValue() returns null, it means the mapping is stale and should be removed.


        /**
         * Create a new instance of this class.
         */
        public ShareableNodesCache() {
            cache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.HARD);
        }

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         *
         * @param id node id
         * @return node or <code>null</code>
         */
        public AbstractNodeData retrieveFirst(NodeId id) {
            ReferenceMap map = (ReferenceMap) cache.get(id);
            if (map != null) {
                Iterator<AbstractNodeData> iter = map.values().iterator();
                try {
                    while (iter.hasNext()) {
                        AbstractNodeData data = iter.next();
                        if (data != null) {
                            return data;

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         * @param id node id
         * @param parentId parent id
         * @return node or <code>null</code>
         */
        public AbstractNodeData retrieve(NodeId id, NodeId parentId) {
            ReferenceMap map = (ReferenceMap) cache.get(id);
            if (map != null) {
                return (AbstractNodeData) map.get(parentId);
            }
            return null;
        }

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         *
         * @param data data to cache
         */
        public void cache(AbstractNodeData data) {
            NodeId id = data.getNodeState().getNodeId();
            ReferenceMap map = (ReferenceMap) cache.get(id);
            if (map == null) {
                map = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.WEAK);
                cache.put(id, map);
            }
            Object old = map.put(data.getPrimaryParentId(), data);
            if (old != null) {
                log.warn("overwriting cached item: " + old);
            }
        }

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         * Evict some node from the cache.
         *
         * @param data data to evict
         */
        public void evict(AbstractNodeData data) {
            ReferenceMap map = (ReferenceMap) cache.get(data.getId());
            if (map != null) {
                map.remove(data.getPrimaryParentId());
            }
        }

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    public NodeTypeManagerImpl(SessionContext context) {
        this.context = context;


        // setup caches with soft references to node type
        // & item definition instances
        ntCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);
        pdCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);
        ndCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);


        NodeTypeRegistry registry = context.getNodeTypeRegistry();


        rootNodeDef = new NodeDefinitionImpl(
                registry.getRootNodeDef(), this, context);

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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( AbstractReferenceMap.HARD, AbstractReferenceMap.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();
      if ( tracing ) LOG.trace("Starting deserialization of [" + count + "] proxiesByKey entries");
      rtn.proxiesByKey = new ReferenceMap( AbstractReferenceMap.HARD, AbstractReferenceMap.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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        this.nsReg = nsReg;
        this.ntReg.addListener(this);


        // setup caches with soft references to node type
        // & item definition instances
        ntCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);
        pdCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);
        ndCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);


        rootNodeDef = new NodeDefinitionImpl(ntReg.getRootNodeDef(), this,
                nsResolver);
        ndCache.put(rootNodeDef.unwrap().getId(), rootNodeDef);
    }

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        this.session = session;
        this.rootNodeDef = rootNodeDef;
        this.rootNodeId = rootNodeId;


        // setup item cache with weak references to items
        itemCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.WEAK);
        itemStateProvider.addListener(this);
    }

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