dom/mdsal-dom-spi/src/main/java/org/opendaylight/mdsal/dom/spi/shard/WriteableSubshardBoundaryNode.java

   1 /*
   2  * Copyright (c) 2016 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.mdsal.dom.spi.shard;
   9
  10 import com.google.common.annotations.Beta;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.collect.ImmutableMap;
  13 import java.util.Map;
  14 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteCursor;
  15 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  16
  17 /**
  18  * Writable node that is located at a boundary to a subshard.
  19  */
  20 @Beta
  21 public class WriteableSubshardBoundaryNode extends WriteableModificationNode {
  22
  23     private final ForeignShardModificationContext boundary;
  24
  25     WriteableSubshardBoundaryNode(final ForeignShardModificationContext boundary) {
  26         this.boundary = Preconditions.checkNotNull(boundary);
  27     }
  28
  29     public static WriteableSubshardBoundaryNode from(final ForeignShardModificationContext value) {
  30         return new WriteableSubshardBoundaryNode(value);
  31     }
  32
  33     @Override
  34     public PathArgument getIdentifier() {
  35         return boundary.getIdentifier().getRootIdentifier().getLastPathArgument();
  36     }
  37
  38     @Override
  39     public WriteCursorStrategy createOperation(final DOMDataTreeWriteCursor parentCursor) {
  40         return new DelegatingWriteCursorStrategy() {
  41             @Override
  42             public void exit() {
  43                 parentCursor.exit();
  44             }
  45
  46             @Override
  47             protected DelegatingWriteCursorStrategy childStrategy() {
  48                 return new DelegatingWriteCursorStrategy() {
  49                     @Override
  50                     protected DOMDataTreeWriteCursor delegate() {
  51                         return boundary.getCursor();
  52                     }
  53                 };
  54             }
  55
  56             @Override
  57             protected DOMDataTreeWriteCursor delegate() {
  58                 return boundary.getCursor();
  59             }
  60         };
  61     }
  62
  63     @Override
  64     public WriteableModificationNode getChild(final PathArgument node) {
  65         // Another level of nesting should be taken care of by underlying cursor.
  66         return null;
  67     }
  68
  69     @Override
  70     public void markDeleted() {
  71         // FIXME: Should we delete all data or disconnect?
  72     }
  73
  74     @Override
  75     public Map<PathArgument, WriteableModificationNode> getChildrenWithSubshards() {
  76         return ImmutableMap.of();
  77     }
  78 }