opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ModifiedDataTreeCandidateNode.java

   1 /*
   2  * Copyright (c) 2015 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.controller.cluster.datastore;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Preconditions;
  12 import java.util.Collection;
  13 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  14 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  15 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  16 import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
  17
  18 /**
  19  * A deserialized {@link DataTreeCandidateNode} which represents a modification in
  20  * one of its children.
  21  */
  22 abstract class ModifiedDataTreeCandidateNode extends AbstractDataTreeCandidateNode {
  23     private final Collection<DataTreeCandidateNode> children;
  24
  25     private ModifiedDataTreeCandidateNode(final Collection<DataTreeCandidateNode> children) {
  26         super(ModificationType.SUBTREE_MODIFIED);
  27         this.children = Preconditions.checkNotNull(children);
  28     }
  29
  30     static DataTreeCandidateNode create(final Collection<DataTreeCandidateNode> children) {
  31         return new ModifiedDataTreeCandidateNode(children) {
  32             @Override
  33             public PathArgument getIdentifier() {
  34                 throw new UnsupportedOperationException("Root node does not have an identifier");
  35             }
  36         };
  37     }
  38
  39     static DataTreeCandidateNode create(final PathArgument identifier, final Collection<DataTreeCandidateNode> children) {
  40         return new ModifiedDataTreeCandidateNode(children) {
  41             @Override
  42             public final PathArgument getIdentifier() {
  43                 return identifier;
  44             }
  45         };
  46     }
  47
  48     @Override
  49     public final Optional<NormalizedNode<?, ?>> getDataAfter() {
  50         throw new UnsupportedOperationException("After-image not available after serialization");
  51     }
  52
  53     @Override
  54     public final Collection<DataTreeCandidateNode> getChildNodes() {
  55         return children;
  56     }
  57 }