yang/yang-data-impl/src/main/java/org/opendaylight/yangtools/yang/data/impl/schema/tree/InMemoryDataTreeFactory.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.yangtools.yang.data.impl.schema.tree;
   9
  10 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  11 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeFactory;
  12 import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
  13 import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
  14 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNodeFactory;
  15 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version;
  16 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  17 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  18
  19 /**
  20  * A factory for creating in-memory data trees.
  21  */
  22 public final class InMemoryDataTreeFactory implements DataTreeFactory {
  23     private static final InMemoryDataTreeFactory INSTANCE = new InMemoryDataTreeFactory();
  24     private final NormalizedNode<?, ?> root = ImmutableNodes.containerNode(SchemaContext.NAME);
  25
  26     private InMemoryDataTreeFactory() {
  27         // Never instantiated externally
  28     }
  29
  30     @Override
  31     public TipProducingDataTree create() {
  32         return create(TreeType.OPERATIONAL);
  33     }
  34
  35     @Override
  36     public TipProducingDataTree create(TreeType treeType) {
  37         return new InMemoryDataTree(TreeNodeFactory.createTreeNode(root, Version.initial()), treeType, null);
  38     }
  39
  40     /**
  41      * Get an instance of this factory. This method cannot fail.
  42      *
  43      * @return Data tree factory instance.
  44      */
  45     public static InMemoryDataTreeFactory getInstance() {
  46         return INSTANCE;
  47     }
  48 }