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