binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/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.mdsal.binding.dom.adapter;
   9
  10 import com.google.common.base.Preconditions;
  11 import java.util.ArrayList;
  12 import java.util.Collection;
  13 import java.util.List;
  14 import java.util.Map.Entry;
  15 import org.opendaylight.mdsal.binding.api.DataObjectModification;
  16 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  17 import org.opendaylight.mdsal.binding.api.DataTreeModification;
  18 import org.opendaylight.mdsal.binding.dom.codec.api.BindingCodecTreeNode;
  19 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  20 import org.opendaylight.mdsal.dom.api.DOMDataTreeCandidate;
  21 import org.opendaylight.yangtools.yang.binding.DataObject;
  22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  23 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  24
  25 /**
  26  * Lazily translated {@link DataTreeModification} based on {@link DataTreeCandidate}.
  27  *
  28  * <p>
  29  * {@link DataTreeModification} represents Data tree change event,
  30  * but whole tree is not translated or resolved eagerly, but only child nodes
  31  * which are directly accessed by user of data object modification.
  32  *
  33  */
  34 class LazyDataTreeModification<T extends DataObject> implements DataTreeModification<T> {
  35
  36     private final DataTreeIdentifier<T> path;
  37     private final DataObjectModification<T> rootNode;
  38
  39     LazyDataTreeModification(DataTreeIdentifier<T> path, final DataObjectModification<T> modification) {
  40         this.path = Preconditions.checkNotNull(path);
  41         this.rootNode = Preconditions.checkNotNull(modification);
  42     }
  43
  44     @Override
  45     public DataObjectModification<T> getRootNode() {
  46         return rootNode;
  47     }
  48
  49     @Override
  50     public DataTreeIdentifier<T> getRootPath() {
  51         return path;
  52     }
  53
  54     @SuppressWarnings({"unchecked", "rawtypes"})
  55     static <T extends DataObject> DataTreeModification<T> create(final BindingToNormalizedNodeCodec codec,
  56             final DataTreeCandidate domChange, final LogicalDatastoreType datastoreType) {
  57         final Entry<InstanceIdentifier<?>, BindingCodecTreeNode<?>> codecCtx =
  58                 codec.getSubtreeCodec(domChange.getRootPath());
  59         final DataTreeIdentifier<?> path = DataTreeIdentifier.create(datastoreType, codecCtx.getKey());
  60         final DataObjectModification<?> modification =
  61                 LazyDataObjectModification.create(codecCtx.getValue(), domChange.getRootNode());
  62         return new LazyDataTreeModification(path, modification);
  63     }
  64
  65     @SuppressWarnings({"unchecked", "rawtypes"})
  66     static <T extends DataObject> DataTreeModification<T> create(BindingToNormalizedNodeCodec codec,
  67             DOMDataTreeCandidate candidate) {
  68         final Entry<InstanceIdentifier<?>, BindingCodecTreeNode<?>> codecCtx =
  69                 codec.getSubtreeCodec(candidate.getRootPath().getRootIdentifier());
  70         final DataTreeIdentifier<?> path =
  71                 DataTreeIdentifier.create(candidate.getRootPath().getDatastoreType(), codecCtx.getKey());
  72         final DataObjectModification<?> modification =
  73                 LazyDataObjectModification.create(codecCtx.getValue(), candidate.getRootNode());
  74         return new LazyDataTreeModification(path, modification);
  75     }
  76
  77     static <T extends DataObject> Collection<DataTreeModification<T>> from(final BindingToNormalizedNodeCodec codec,
  78             final Collection<DataTreeCandidate> domChanges, final LogicalDatastoreType datastoreType) {
  79         final List<DataTreeModification<T>> result = new ArrayList<>(domChanges.size());
  80         for (final DataTreeCandidate domChange : domChanges) {
  81             result.add(LazyDataTreeModification.create(codec, domChange, datastoreType));
  82         }
  83         return result;
  84     }
  85
  86 }