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.YangInstanceIdentifier;
  11 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  12 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  13 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  14 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  15 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  16 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeFactory;
  17 import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
  18 import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
  19 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNodeFactory;
  20 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version;
  21 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  22 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeBuilder;
  23 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  24
  25 /**
  26  * A factory for creating in-memory data trees.
  27  */
  28 public final class InMemoryDataTreeFactory implements DataTreeFactory {
  29     private static final InMemoryDataTreeFactory INSTANCE = new InMemoryDataTreeFactory();
  30     private final NormalizedNode<?, ?> rootContainer = ImmutableNodes.containerNode(SchemaContext.NAME);
  31
  32     private InMemoryDataTreeFactory() {
  33         // Never instantiated externally
  34     }
  35
  36     @Deprecated
  37     @Override
  38     public TipProducingDataTree create() {
  39         return create(TreeType.OPERATIONAL);
  40     }
  41
  42     @Override
  43     public TipProducingDataTree create(final TreeType treeType) {
  44         return new InMemoryDataTree(TreeNodeFactory.createTreeNode(rootContainer, Version.initial()),
  45             treeType, YangInstanceIdentifier.EMPTY, null);
  46     }
  47
  48     @Override
  49     public TipProducingDataTree create(final TreeType treeType, final YangInstanceIdentifier rootPath) {
  50         final NormalizedNode<?, ?> root;
  51         final PathArgument arg = rootPath.getLastPathArgument();
  52         if (arg instanceof NodeIdentifier) {
  53             root = rootContainer;
  54         } else if (arg instanceof NodeIdentifierWithPredicates) {
  55             final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> b = ImmutableNodes.mapEntryBuilder();
  56             b.withNodeIdentifier((NodeIdentifierWithPredicates) arg);
  57             root = b.build();
  58         } else {
  59             // FIXME: implement augmentations and leaf-lists
  60             throw new IllegalArgumentException("Unsupported root node " + arg);
  61         }
  62
  63         return new InMemoryDataTree(TreeNodeFactory.createTreeNode(root, Version.initial()), treeType, rootPath, null);
  64     }
  65
  66     /**
  67      * Get an instance of this factory. This method cannot fail.
  68      *
  69      * @return Data tree factory instance.
  70      */
  71     public static InMemoryDataTreeFactory getInstance() {
  72         return INSTANCE;
  73     }
  74 }