binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/BindingDOMDataTreeChangeServiceAdapter.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 org.opendaylight.mdsal.binding.api.ClusteredDataTreeChangeListener;
  12 import org.opendaylight.mdsal.binding.api.DataTreeChangeListener;
  13 import org.opendaylight.mdsal.binding.api.DataTreeChangeService;
  14 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  15 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeService;
  16 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  17 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  18 import org.opendaylight.yangtools.yang.binding.DataObject;
  19 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  20
  21 /**
  22  * Adapter exposing Binding {@link DataTreeChangeService} and wrapping
  23  * {@link DOMDataTreeChangeService} and is responsible for translation
  24  * and instantiation of {@link BindingDOMDataTreeChangeListenerAdapter}
  25  * adapters.
  26  *
  27  * <p>
  28  * Each registered {@link DataTreeChangeListener} is wrapped using
  29  * adapter and registered directly to DOM service.
  30  */
  31 final class BindingDOMDataTreeChangeServiceAdapter implements DataTreeChangeService {
  32
  33     private final BindingToNormalizedNodeCodec codec;
  34     private final DOMDataTreeChangeService dataTreeChangeService;
  35
  36     private BindingDOMDataTreeChangeServiceAdapter(final BindingToNormalizedNodeCodec codec,
  37             final DOMDataTreeChangeService dataTreeChangeService) {
  38         this.codec = Preconditions.checkNotNull(codec);
  39         this.dataTreeChangeService = Preconditions.checkNotNull(dataTreeChangeService);
  40     }
  41
  42     static DataTreeChangeService create(final BindingToNormalizedNodeCodec codec,
  43             final DOMDataTreeChangeService dataTreeChangeService) {
  44         return new BindingDOMDataTreeChangeServiceAdapter(codec, dataTreeChangeService);
  45     }
  46
  47     @Override
  48     public <T extends DataObject, L extends DataTreeChangeListener<T>> ListenerRegistration<L>
  49             registerDataTreeChangeListener(final DataTreeIdentifier<T> treeId, final L listener) {
  50         final DOMDataTreeIdentifier domIdentifier = toDomTreeIdentifier(treeId);
  51
  52         @SuppressWarnings({ "rawtypes", "unchecked" })
  53         final BindingDOMDataTreeChangeListenerAdapter<T> domListener =
  54                 listener instanceof ClusteredDataTreeChangeListener
  55                         ? new BindingClusteredDOMDataTreeChangeListenerAdapter<>(
  56                                 codec, (ClusteredDataTreeChangeListener) listener, treeId.getDatastoreType())
  57                         : new BindingDOMDataTreeChangeListenerAdapter<>(codec, listener, treeId.getDatastoreType());
  58
  59         final ListenerRegistration<BindingDOMDataTreeChangeListenerAdapter<T>> domReg =
  60                 dataTreeChangeService.registerDataTreeChangeListener(domIdentifier, domListener);
  61         return new BindingDataTreeChangeListenerRegistration<>(listener, domReg);
  62     }
  63
  64     private DOMDataTreeIdentifier toDomTreeIdentifier(final DataTreeIdentifier<?> treeId) {
  65         final YangInstanceIdentifier domPath = codec.toYangInstanceIdentifierBlocking(treeId.getRootIdentifier());
  66         return new DOMDataTreeIdentifier(treeId.getDatastoreType(), domPath);
  67     }
  68 }