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