opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/tree/data/InMemoryDataTreeFactory.java

   1 package org.opendaylight.controller.md.sal.dom.store.impl.tree.data;
   2
   3 import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataTreeFactory;
   4 import org.opendaylight.controller.md.sal.dom.store.impl.tree.spi.TreeNodeFactory;
   5 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.NodeIdentifier;
   6 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
   7 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
   8 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
   9
  10 import com.google.common.primitives.UnsignedLong;
  11
  12 /**
  13  * A factory for creating in-memory data trees.
  14  */
  15 public final class InMemoryDataTreeFactory implements DataTreeFactory {
  16     private static final InMemoryDataTreeFactory INSTANCE = new InMemoryDataTreeFactory();
  17
  18     private InMemoryDataTreeFactory() {
  19         // Never instantiated externally
  20     }
  21
  22     @Override
  23     public InMemoryDataTree create() {
  24         final NodeIdentifier root = new NodeIdentifier(SchemaContext.NAME);
  25         final NormalizedNode<?, ?> data = Builders.containerBuilder().withNodeIdentifier(root).build();
  26
  27         return new InMemoryDataTree(TreeNodeFactory.createTreeNode(data, UnsignedLong.ZERO), null);
  28     }
  29
  30     /**
  31      * Get an instance of this factory. This method cannot fail.
  32      *
  33      * @return Data tree factory instance.
  34      */
  35     public static final InMemoryDataTreeFactory getInstance() {
  36         return INSTANCE;
  37     }
  38 }