dom/mdsal-dom-inmemory-datastore/src/main/java/org/opendaylight/mdsal/dom/store/inmemory/ShardDataModificationFactoryBuilder.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
   9 package org.opendaylight.mdsal.dom.store.inmemory;
  10
  11 import com.google.common.base.Preconditions;
  12 import java.util.HashMap;
  13 import java.util.Iterator;
  14 import java.util.Map;
  15 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  16 import org.opendaylight.mdsal.dom.spi.shard.ForeignShardModificationContext;
  17 import org.opendaylight.mdsal.dom.spi.shard.ModificationContextNodeBuilder;
  18 import org.opendaylight.mdsal.dom.spi.shard.WriteableSubshardBoundaryNode;
  19 import org.opendaylight.yangtools.concepts.Builder;
  20 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  22
  23 public abstract class ShardDataModificationFactoryBuilder<T> extends ModificationContextNodeBuilder
  24         implements Builder<T> {
  25     protected final DOMDataTreeIdentifier root;
  26     protected final Map<DOMDataTreeIdentifier, ForeignShardModificationContext> childShards = new HashMap<>();
  27
  28     public ShardDataModificationFactoryBuilder(final DOMDataTreeIdentifier root) {
  29         this.root = Preconditions.checkNotNull(root);
  30     }
  31
  32     public void addSubshard(final ForeignShardModificationContext value) {
  33         WriteableSubshardBoundaryNode leafNode = WriteableSubshardBoundaryNode.from(value);
  34         putNode(value.getIdentifier().getRootIdentifier(), leafNode);
  35     }
  36
  37     public void addSubshard(final DOMDataTreeIdentifier prefix, final ForeignShardModificationContext value) {
  38         childShards.put(prefix, value);
  39     }
  40
  41     private void putNode(final YangInstanceIdentifier key, final WriteableSubshardBoundaryNode subshardNode) {
  42         final Iterator<PathArgument> toBoundary = toRelative(key).getPathArguments().iterator();
  43         if (toBoundary.hasNext()) {
  44             ModificationContextNodeBuilder current = this;
  45             while (true) {
  46                 final PathArgument nextArg = toBoundary.next();
  47                 if (!toBoundary.hasNext()) {
  48                     current.addBoundary(nextArg, subshardNode);
  49                     break;
  50                 }
  51
  52                 current = current.getInterior(nextArg);
  53             }
  54         }
  55     }
  56
  57     private YangInstanceIdentifier toRelative(final YangInstanceIdentifier key) {
  58         return key.relativeTo(root.getRootIdentifier()).get();
  59     }
  60
  61     public abstract T build();
  62 }