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     @Override
  37     public TipProducingDataTree create() {
  38         return create(TreeType.OPERATIONAL);
  39     }
  40
  41     @Override
  42     public TipProducingDataTree create(final TreeType treeType) {
  43         return new InMemoryDataTree(TreeNodeFactory.createTreeNode(rootContainer, Version.initial()),
  44             treeType, YangInstanceIdentifier.EMPTY, null);
  45     }
  46
  47     @Override
  48     public TipProducingDataTree create(final TreeType treeType, final YangInstanceIdentifier rootPath) {
  49         final NormalizedNode<?, ?> root;
  50         final PathArgument arg = rootPath.getLastPathArgument();
  51         if (arg instanceof NodeIdentifier) {
  52             root = rootContainer;
  53         } else if (arg instanceof NodeIdentifierWithPredicates) {
  54             final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> b = ImmutableNodes.mapEntryBuilder();
  55             b.withNodeIdentifier((NodeIdentifierWithPredicates) arg);
  56             root = b.build();
  57         } else {
  58             // FIXME: implement augmentations and leaf-lists
  59             throw new IllegalArgumentException("Unsupported root node " + arg);
  60         }
  61
  62         return new InMemoryDataTree(TreeNodeFactory.createTreeNode(root, Version.initial()), treeType, rootPath, null);
  63     }
  64
  65     /**
  66      * Get an instance of this factory. This method cannot fail.
  67      *
  68      * @return Data tree factory instance.
  69      */
  70     public static InMemoryDataTreeFactory getInstance() {
  71         return INSTANCE;
  72     }
  73 }