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.DataTreeConfiguration;
  19 import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
  20 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNodeFactory;
  21 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version;
  22 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  23 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeBuilder;
  24 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  25
  26 /**
  27  * A factory for creating in-memory data trees.
  28  */
  29 public final class InMemoryDataTreeFactory implements DataTreeFactory {
  30     private static final InMemoryDataTreeFactory INSTANCE = new InMemoryDataTreeFactory();
  31     private final NormalizedNode<?, ?> rootContainer = ImmutableNodes.containerNode(SchemaContext.NAME);
  32
  33     private InMemoryDataTreeFactory() {
  34         // Never instantiated externally
  35     }
  36
  37     @Override
  38     public TipProducingDataTree create(final TreeType treeType) {
  39         return new InMemoryDataTree(TreeNodeFactory.createTreeNode(rootContainer, Version.initial()),
  40             treeType, YangInstanceIdentifier.EMPTY, null);
  41     }
  42
  43     @Override
  44     public TipProducingDataTree create(final DataTreeConfiguration treeConfig) {
  45         return new InMemoryDataTree(TreeNodeFactory.createTreeNode(rootContainer, Version.initial()),
  46                 treeConfig, YangInstanceIdentifier.EMPTY, null);
  47     }
  48
  49     @Override
  50     public TipProducingDataTree create(final TreeType treeType, final YangInstanceIdentifier rootPath) {
  51         if (rootPath.isEmpty()) {
  52             return create(treeType);
  53         }
  54         final NormalizedNode<?, ?> root;
  55         final PathArgument arg = rootPath.getLastPathArgument();
  56         if (arg instanceof NodeIdentifier) {
  57             root = rootContainer;
  58         } else if (arg instanceof NodeIdentifierWithPredicates) {
  59             final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> b = ImmutableNodes.mapEntryBuilder();
  60             b.withNodeIdentifier((NodeIdentifierWithPredicates) arg);
  61             root = b.build();
  62         } else {
  63
  64             // FIXME: implement augmentations and leaf-lists
  65             throw new IllegalArgumentException("Unsupported root node " + arg);
  66         }
  67
  68         return new InMemoryDataTree(TreeNodeFactory.createTreeNode(root, Version.initial()), treeType, rootPath, null);
  69     }
  70
  71     /**
  72      * Get an instance of this factory. This method cannot fail.
  73      *
  74      * @return Data tree factory instance.
  75      */
  76     public static InMemoryDataTreeFactory getInstance() {
  77         return INSTANCE;
  78     }
  79 }