binding2/mdsal-binding2-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/javav2/dom/adapter/impl/data/tree/BindingDOMDataTreeListenerAdapter.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies s.r.o. 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.javav2.dom.adapter.impl.data.tree;
   9
  10 import com.google.common.annotations.Beta;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.collect.Maps;
  13 import java.util.ArrayList;
  14 import java.util.Collection;
  15 import java.util.List;
  16 import java.util.Map;
  17 import java.util.Map.Entry;
  18 import javax.annotation.Nonnull;
  19 import org.opendaylight.mdsal.binding.javav2.api.DataTreeIdentifier;
  20 import org.opendaylight.mdsal.binding.javav2.api.DataTreeListener;
  21 import org.opendaylight.mdsal.binding.javav2.api.DataTreeListeningException;
  22 import org.opendaylight.mdsal.binding.javav2.api.DataTreeModification;
  23 import org.opendaylight.mdsal.binding.javav2.dom.codec.impl.BindingToNormalizedNodeCodec;
  24 import org.opendaylight.mdsal.binding.javav2.dom.codec.modification.LazyDataTreeModification;
  25 import org.opendaylight.mdsal.binding.javav2.spec.base.InstanceIdentifier;
  26 import org.opendaylight.mdsal.binding.javav2.spec.base.TreeNode;
  27 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  28 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  29 import org.opendaylight.mdsal.dom.api.DOMDataTreeListener;
  30 import org.opendaylight.mdsal.dom.api.DOMDataTreeListeningException;
  31 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  32 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  33
  34 /**
  35  * Data tree listener adapter.
  36  */
  37 @Beta
  38 public class BindingDOMDataTreeListenerAdapter implements DOMDataTreeListener {
  39
  40     private final DataTreeListener delegate;
  41     private final BindingToNormalizedNodeCodec codec;
  42     private final LogicalDatastoreType store;
  43
  44     public BindingDOMDataTreeListenerAdapter(final DataTreeListener delegate,
  45             final BindingToNormalizedNodeCodec codec, final LogicalDatastoreType store) {
  46         this.delegate = Preconditions.checkNotNull(delegate, "delegate");
  47         this.codec = Preconditions.checkNotNull(codec, "codec");
  48         this.store = Preconditions.checkNotNull(store, "store");
  49     }
  50
  51     @Override
  52     public void onDataTreeChanged(@Nonnull final Collection<DataTreeCandidate> domChanges,
  53             @Nonnull final Map<DOMDataTreeIdentifier, NormalizedNode<?, ?>> domSubtrees) {
  54
  55         final Collection<DataTreeModification<?>> changes = toBinding(domChanges);
  56         final Map<DataTreeIdentifier<?>, TreeNode> subtrees = toBinding(domSubtrees);
  57
  58         delegate.onDataTreeChanged(changes, subtrees);
  59     }
  60
  61     private Map<DataTreeIdentifier<?>, TreeNode>
  62             toBinding(final Map<DOMDataTreeIdentifier, NormalizedNode<?, ?>> domSubtrees) {
  63         // FIXME: Introduce lazy translating map
  64         final Map<DataTreeIdentifier<?>, TreeNode> ret = Maps.newHashMapWithExpectedSize(domSubtrees.size());
  65         for (final Entry<DOMDataTreeIdentifier, NormalizedNode<?, ?>> domEntry : domSubtrees.entrySet()) {
  66             final Entry<InstanceIdentifier<?>, TreeNode> bindingEntry =
  67                     codec.fromNormalizedNode(domEntry.getKey().getRootIdentifier(), domEntry.getValue());
  68             ret.put(DataTreeIdentifier.create(store, bindingEntry.getKey()), bindingEntry.getValue());
  69         }
  70         return ret;
  71     }
  72
  73     @SuppressWarnings("unchecked")
  74     private Collection<DataTreeModification<?>> toBinding(final Collection<DataTreeCandidate> domChanges) {
  75         return Collection.class.cast(LazyDataTreeModification.from(codec, domChanges, store));
  76     }
  77
  78     @Override
  79     public void onDataTreeFailed(@Nonnull final Collection<DOMDataTreeListeningException> causes) {
  80         final List<DataTreeListeningException> bindingCauses = new ArrayList<>(causes.size());
  81         for (final DOMDataTreeListeningException cause : causes) {
  82             bindingCauses.add(mapException(cause));
  83         }
  84
  85         delegate.onDataTreeFailed(bindingCauses);
  86     }
  87
  88     private static DataTreeListeningException mapException(final DOMDataTreeListeningException cause) {
  89         // FIXME: Extend logic
  90         return new DataTreeListeningException(cause.getMessage(), cause);
  91     }
  92 }
  93