Examples of java.util.IdentityHashMap$IdentityHashMapEntry

java.util.IdentityHashMap
IdentityHashMap is a variant on HashMap which tests equality by reference instead of equality by value. Basically, keys and values are compared for equality by checking if their references are equal rather than by calling the "equals" function.
Note: This class intentionally violates the general contract of {@code Map}'s on comparing objects by their {@code equals} method.
IdentityHashMap uses open addressing (linear probing in particular) for collision resolution. This is different from HashMap which uses Chaining.
Like HashMap, IdentityHashMap is not thread safe, so access by multiple threads must be synchronized by an external mechanism such as Collections.synchronizedMap. @since 1.4


  /**
   * Returns a new non-threadsafe context map.
   */
  public static Map newContext() {
    return new IdentityHashMap();
  }

View Full Code Here

        }
        else if (source == destination) {
            return;
        }
        else {
            this.localIdentityMap.set(new IdentityHashMap());
            this.doMerge(source, destination);
        }
    }

View Full Code Here

        }
    }
    
    private void cascadeMerge(Object source, Object destination) {
        // We are traversing the source object graph, and we'll have to put in an identity map the source object.
        IdentityHashMap localIdentityMap = (IdentityHashMap) DefaultIdMerger.localIdentityMap.get();
        if (! localIdentityMap.containsKey(source)) {
            localIdentityMap.put(source, new Integer(1));
            this.doCascadeMerge(source, destination);
        }
    }

View Full Code Here

    public DefaultPrevalentSystem() {
        this.merger.setPrevalenceInfo(this.prevalenceInfo);
    }
    
    public Object save(Object newEntity) {
        this.localIdentityMap.set(new IdentityHashMap());
        this.internalSave(newEntity);
        return newEntity;
    }

View Full Code Here

    public Object update(Object entity) {
        Object id = null;
        try {
            id = this.prevalenceInfo.getIdResolutionStrategy().resolveId(entity).get(entity);
            if (id != null) {
                this.localIdentityMap.set(new IdentityHashMap());
                this.internalUpdate(entity, id);
                return entity;
            } else {
                throw new PrevaylerUnsavedObjectException("Cannot update unsaved object!");
            }

View Full Code Here

            Map entityMap = this.lookupMap(newEntity.getClass());
            // Assign id:
            id = this.prevalenceInfo.getIdGenerationStrategy().generateId();
            this.prevalenceInfo.getIdResolutionStrategy().resolveId(newEntity).set(newEntity, id);
            // Add the entity to the thread local identity map, for tracking its traversal (an entity once traversed must not be tarversed again):
            IdentityHashMap localIdentityMap = (IdentityHashMap) DefaultPrevalentSystem.localIdentityMap.get();
            localIdentityMap.put(newEntity, new Integer(1));
            // Add the new entity to the system:
            entityMap.put(id, newEntity);
            // Self cascade persistence (needed for updating pointers to already persisted entities):
            this.doCascadePersistence(newEntity, newEntity);
            // Return the new, updated and saved, entity:

View Full Code Here

        //  Get the identity map by the entity class:
        Map entityMap = this.lookupMap(updatedEntity.getClass());
        // Look for the entity in the map and update it (if found):
        Object currentEntity = entityMap.get(id);
        if ((currentEntity != null) && (currentEntity.getClass().equals(updatedEntity.getClass()))) {
            IdentityHashMap localIdentityMap = (IdentityHashMap) DefaultPrevalentSystem.localIdentityMap.get();
            // If the object has still not been reached:
            if (localIdentityMap.get(currentEntity) == null) {
                // Add the actual entity to the thread local identity map, for tracking its traversal (an entity once traversed must not be tarversed again):
                localIdentityMap.put(currentEntity, new Integer(1));
                // Copy new into actual and do cascade persistence:
                this.doCascadePersistence(updatedEntity, currentEntity);
            }
            // Return the updated (original) entity:
            return currentEntity;

View Full Code Here

   * @generated
   */
  public static ENamedElement getElement(IAdaptable hint) {
    Object type = hint.getAdapter(IElementType.class);
    if (elements == null) {
      elements = new IdentityHashMap();


      elements.put(Container_1000, OntoUML.OntoUMLPackage.eINSTANCE
          .getContainer());


      elements.put(Category_2001, OntoUML.OntoUMLPackage.eINSTANCE

View Full Code Here


  /**
   * Create an IdentitySet with default sizing.
   */
  public IdentitySet() {
    this.map = new IdentityHashMap();
  }

View Full Code Here

   * Create an IdentitySet with the given sizing.
   *
   * @param sizing The sizing of the set to create.
   */
  public IdentitySet(int sizing) {
    this.map = new IdentityHashMap( sizing );
  }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of java.util.IdentityHashMap$IdentityHashMapEntry

ariba.ui.aribaweb.util.AWJarWalker

com.alibaba.citrus.hessian.io.HessianOutput

com.alibaba.dubbo.common.utils.PojoUtils

com.alibaba.fastjson.parser.deserializer.DefaultObjectDeserializer

com.alibaba.fastjson.parser.deserializer.MapDeserializer

com.alibaba.json.bvt.parser.deser.ConcurrentHashMapDeserializerTest

com.alibaba.otter.shared.common.utils.sizeof.ObjectProfiler

com.bubble.serializer.SerializationContext

com.caucho.burlap.io.BurlapOutput

com.caucho.hessian.io.HessianOutput

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.