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