opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/persisted/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.persisted;
   9
  10 import com.google.common.base.Preconditions;
  11 import java.util.Collection;
  12 import java.util.Optional;
  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 ModificationType type,
  26             final Collection<DataTreeCandidateNode> children) {
  27         super(type);
  28         this.children = Preconditions.checkNotNull(children);
  29     }
  30
  31     static DataTreeCandidateNode create(final ModificationType type, final Collection<DataTreeCandidateNode> children) {
  32         return new ModifiedDataTreeCandidateNode(type, children) {
  33             @Override
  34             public PathArgument getIdentifier() {
  35                 throw new UnsupportedOperationException("Root node does not have an identifier");
  36             }
  37         };
  38     }
  39
  40     static DataTreeCandidateNode create(final PathArgument identifier, final ModificationType type,
  41             final Collection<DataTreeCandidateNode> children) {
  42         return new ModifiedDataTreeCandidateNode(type, children) {
  43             @Override
  44             public PathArgument getIdentifier() {
  45                 return identifier;
  46             }
  47         };
  48     }
  49
  50     @Override
  51     public final Optional<NormalizedNode<?, ?>> getDataAfter() {
  52         throw new UnsupportedOperationException("After-image not available after serialization");
  53     }
  54
  55     @Override
  56     public final Collection<DataTreeCandidateNode> getChildNodes() {
  57         return children;
  58     }
  59 }