opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/LazyDataTreeModification.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.md.sal.binding.impl;
   9
  10 import java.util.ArrayList;
  11 import java.util.Collection;
  12 import java.util.List;
  13 import java.util.Map.Entry;
  14 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  15 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  16 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  18 import org.opendaylight.yangtools.binding.data.codec.api.BindingCodecTreeNode;
  19 import org.opendaylight.yangtools.yang.binding.DataObject;
  20 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  21 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  22
  23 /**
  24  * Lazily translated {@link DataTreeModification} based on {@link DataTreeCandidate}.
  25  *
  26  * {@link DataTreeModification} represents Data tree change event,
  27  * but whole tree is not translated or resolved eagerly, but only child nodes
  28  * which are directly accessed by user of data object modification.
  29  *
  30  */
  31 class LazyDataTreeModification<T extends DataObject> implements DataTreeModification<T> {
  32
  33     private final DataTreeIdentifier<T> path;
  34     private final DataObjectModification<T> rootNode;
  35
  36     LazyDataTreeModification(final LogicalDatastoreType datastoreType, final InstanceIdentifier<T> path, final BindingCodecTreeNode<T> codec, final DataTreeCandidate domChange) {
  37         this.path = new DataTreeIdentifier<>(datastoreType, path);
  38         this.rootNode = LazyDataObjectModification.create(codec, domChange.getRootNode());
  39     }
  40
  41     @Override
  42     public DataObjectModification<T> getRootNode() {
  43         return rootNode;
  44     }
  45
  46     @Override
  47     public DataTreeIdentifier<T> getRootPath() {
  48         return path;
  49     }
  50
  51     @SuppressWarnings({"unchecked", "rawtypes"})
  52     static <T extends DataObject> DataTreeModification<T> create(final BindingToNormalizedNodeCodec codec, final DataTreeCandidate domChange,
  53             final LogicalDatastoreType datastoreType) {
  54         final Entry<InstanceIdentifier<?>, BindingCodecTreeNode<?>> codecCtx =
  55                 codec.getSubtreeCodec(domChange.getRootPath());
  56         return (DataTreeModification<T>) new LazyDataTreeModification(datastoreType, codecCtx.getKey(), codecCtx.getValue(), domChange);
  57     }
  58
  59     static <T extends DataObject> Collection<DataTreeModification<T>> from(final BindingToNormalizedNodeCodec codec,
  60             final Collection<DataTreeCandidate> domChanges, final LogicalDatastoreType datastoreType) {
  61         final List<DataTreeModification<T>> result = new ArrayList<>(domChanges.size());
  62         for (final DataTreeCandidate domChange : domChanges) {
  63             result.add(LazyDataTreeModification.<T>create(codec, domChange, datastoreType));
  64         }
  65         return result;
  66     }
  67
  68 }