Examples of com.sun.sgs.app.DataManager.createReference()

com.sun.sgs.app.DataManager.createReference()
Creates a managed reference to an object, storing the object in the data manager if it is transient. Applications should use managed references when a managed object refers to another managed object, either directly or indirectly through non-managed objects. @param < T> the type of the object @param object the object @return the managed reference @throws IllegalArgumentException if object does notimplement both {@link ManagedObject} and {@link Serializable} @throws ObjectNotFoundException if the object has been removed @throws TransactionException if the operation failed because of aproblem with the current transaction


  // lastly, fill the directory with the references
  int pos = 0;
  for (ScalableHashMap leaf : leaves) {
      int nextPos = pos + entriesPerLeaf;
      Arrays.fill(nodeDirectory, pos, nextPos, dm.createReference(leaf));
      pos = nextPos;
  }


  /* Make sure the leaves have the minimum required depth. */
  for (ScalableHashMap leaf : leaves) {

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  setDirectoryNode();
  size = 0;


  // create the references to the new children
        ManagedReference<ScalableHashMap<K, V>> leftChildRef =
                dataManager.createReference(leftChild);
        ManagedReference<ScalableHashMap<K, V>> rightChildRef =
                dataManager.createReference(rightChild);


  if (leftLeafRef != null) {
            ScalableHashMap<K, V> leftLeaf = leftLeafRef.get();

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  // create the references to the new children
        ManagedReference<ScalableHashMap<K, V>> leftChildRef =
                dataManager.createReference(leftChild);
        ManagedReference<ScalableHashMap<K, V>> rightChildRef =
                dataManager.createReference(rightChild);


  if (leftLeafRef != null) {
            ScalableHashMap<K, V> leftLeaf = leftLeafRef.get();
      leftLeaf.rightLeafRef = leftChildRef;
      leftChild.leftLeafRef = leftLeafRef;

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      depth % maxDirBits == 0 ||
      depth == minDepth) {


      // this leaf node will become a directory node
            ManagedReference<ScalableHashMap<K, V>> thisRef =
    dataManager.createReference(this);
      rightChild.parentRef = thisRef;
      leftChild.parentRef = thisRef;


      setDirectoryNode();
      nodeDirectory = new ManagedReference[1 << getNodeDirBits()];

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  dm.markForUpdate(this);


  // update the new children nodes to point to this directory node as
  // their parent
        ManagedReference<ScalableHashMap<K, V>> thisRef =
      dm.createReference(this);
  rightChildRef.get().parentRef = thisRef;
  leftChildRef.get().parentRef = thisRef;


  // how many bits in the prefix are significant for looking up the
  // old leaf

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      // single KeyValuePair
      if (!(k instanceof ManagedObject) &&
    !(v instanceof ManagedObject))
      {
    setKeyValuePair();
    keyOrPairRef = dm.createReference(
        new ManagedSerializable<Object>(
                        new KeyValuePair<K, V>(k, v)));
      } else {
    // For the key and value, if each is already a ManagedObject,
    // then we obtain a ManagedReference to the object itself,

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    // For the key and value, if each is already a ManagedObject,
    // then we obtain a ManagedReference to the object itself,
    // otherwise, we need to wrap it in a ManagedSerializable and
    // get a ManagedReference to that
    setKeyWrapped(!(k instanceof ManagedObject));
    keyOrPairRef = dm.createReference(
        isKeyWrapped() ? new ManagedSerializable<Object>(k) : k);
    setValueWrapped(!(v instanceof ManagedObject));
    valueRef = dm.createReference(
        isValueWrapped() ? new ManagedSerializable<V>(v) : v);
      }

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    // get a ManagedReference to that
    setKeyWrapped(!(k instanceof ManagedObject));
    keyOrPairRef = dm.createReference(
        isKeyWrapped() ? new ManagedSerializable<Object>(k) : k);
    setValueWrapped(!(v instanceof ManagedObject));
    valueRef = dm.createReference(
        isValueWrapped() ? new ManagedSerializable<V>(v) : v);
      }
  }


  /** Returns whether the key and value are stored as a pair. */

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        setKeyWrapped(true);
    } else if (isValueWrapped()) {
        dm.removeObject(valueRef.get());
        setValueWrapped(false);
    }
    valueRef = dm.createReference(newValue);
      } else if (isKeyValuePair()) {
                ManagedSerializable<KeyValuePair<K, V>> msPair =
        uncheckedCast(keyOrPairRef.get());
    msPair.get().setValue(newValue);
      } else if (isKeyWrapped()) {

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    setKeyValuePair();
      } else if (isValueWrapped()) {
    ManagedSerializable<V> ms = uncheckedCast(valueRef.get());
    ms.set(newValue);
      } else {
    valueRef = dm.createReference(
        new ManagedSerializable<V>(newValue));
    setValueWrapped(true);
      }
  }

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