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 static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.annotations.Beta;
  13 import com.google.common.collect.Maps;
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.List;
  17 import java.util.Map;
  18 import java.util.Map.Entry;
  19 import javax.annotation.Nonnull;
  20 import org.opendaylight.mdsal.binding.javav2.api.DataTreeIdentifier;
  21 import org.opendaylight.mdsal.binding.javav2.api.DataTreeListener;
  22 import org.opendaylight.mdsal.binding.javav2.api.DataTreeListeningException;
  23 import org.opendaylight.mdsal.binding.javav2.api.DataTreeModification;
  24 import org.opendaylight.mdsal.binding.javav2.dom.codec.impl.BindingToNormalizedNodeCodec;
  25 import org.opendaylight.mdsal.binding.javav2.dom.codec.modification.LazyDataTreeModification;
  26 import org.opendaylight.mdsal.binding.javav2.spec.base.InstanceIdentifier;
  27 import org.opendaylight.mdsal.binding.javav2.spec.base.TreeNode;
  28 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  29 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  30 import org.opendaylight.mdsal.dom.api.DOMDataTreeListener;
  31 import org.opendaylight.mdsal.dom.api.DOMDataTreeListeningException;
  32 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  33 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  34
  35 /**
  36  * Data tree listener adapter.
  37  */
  38 @Beta
  39 public class BindingDOMDataTreeListenerAdapter implements DOMDataTreeListener {
  40
  41     private final DataTreeListener delegate;
  42     private final BindingToNormalizedNodeCodec codec;
  43     private final LogicalDatastoreType store;
  44
  45     public BindingDOMDataTreeListenerAdapter(final DataTreeListener delegate,
  46             final BindingToNormalizedNodeCodec codec, final LogicalDatastoreType store) {
  47         this.delegate = requireNonNull(delegate, "delegate");
  48         this.codec = requireNonNull(codec, "codec");
  49         this.store = requireNonNull(store, "store");
  50     }
  51
  52     @Override
  53     public void onDataTreeChanged(@Nonnull final Collection<DataTreeCandidate> domChanges,
  54             @Nonnull final Map<DOMDataTreeIdentifier, NormalizedNode<?, ?>> domSubtrees) {
  55
  56         final Collection<DataTreeModification<?>> changes = toBinding(domChanges);
  57         final Map<DataTreeIdentifier<?>, TreeNode> subtrees = toBinding(domSubtrees);
  58
  59         delegate.onDataTreeChanged(changes, subtrees);
  60     }
  61
  62     private Map<DataTreeIdentifier<?>, TreeNode>
  63             toBinding(final Map<DOMDataTreeIdentifier, NormalizedNode<?, ?>> domSubtrees) {
  64         // FIXME: Introduce lazy translating map
  65         final Map<DataTreeIdentifier<?>, TreeNode> ret = Maps.newHashMapWithExpectedSize(domSubtrees.size());
  66         for (final Entry<DOMDataTreeIdentifier, NormalizedNode<?, ?>> domEntry : domSubtrees.entrySet()) {
  67             final Entry<InstanceIdentifier<?>, TreeNode> bindingEntry =
  68                     codec.fromNormalizedNode(domEntry.getKey().getRootIdentifier(), domEntry.getValue());
  69             ret.put(DataTreeIdentifier.create(store, bindingEntry.getKey()), bindingEntry.getValue());
  70         }
  71         return ret;
  72     }
  73
  74     @SuppressWarnings("unchecked")
  75     private Collection<DataTreeModification<?>> toBinding(final Collection<DataTreeCandidate> domChanges) {
  76         return Collection.class.cast(LazyDataTreeModification.from(codec, domChanges, store));
  77     }
  78
  79     @Override
  80     public void onDataTreeFailed(@Nonnull final Collection<DOMDataTreeListeningException> causes) {
  81         final List<DataTreeListeningException> bindingCauses = new ArrayList<>(causes.size());
  82         for (final DOMDataTreeListeningException cause : causes) {
  83             bindingCauses.add(mapException(cause));
  84         }
  85
  86         delegate.onDataTreeFailed(bindingCauses);
  87     }
  88
  89     private static DataTreeListeningException mapException(final DOMDataTreeListeningException cause) {
  90         // FIXME: Extend logic
  91         return new DataTreeListeningException(cause.getMessage(), cause);
  92     }
  93 }
  94