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 org.opendaylight.mdsal.dom.api.DOMDataTreeChangeService;
  11 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  12
  13 import org.opendaylight.mdsal.binding.api.DataTreeChangeListener;
  14 import org.opendaylight.mdsal.binding.api.DataTreeChangeService;
  15 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  16 import com.google.common.base.Preconditions;
  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 /**
  23  *
  24  * Adapter exposing Binding {@link DataTreeChangeService} and wrapping
  25  * {@link DOMDataTreeChangeService} and is responsible for translation
  26  * and instantiation of {@link BindingDOMDataTreeChangeListenerAdapter}
  27  * adapters.
  28  *
  29  * Each registered {@link DataTreeChangeListener} is wrapped using
  30  * adapter and registered directly to DOM service.
  31  */
  32 final class BindingDOMDataTreeChangeServiceAdapter implements DataTreeChangeService {
  33
  34     private final BindingToNormalizedNodeCodec codec;
  35     private final DOMDataTreeChangeService dataTreeChangeService;
  36
  37     private BindingDOMDataTreeChangeServiceAdapter(final BindingToNormalizedNodeCodec codec,
  38             final DOMDataTreeChangeService dataTreeChangeService) {
  39         this.codec = Preconditions.checkNotNull(codec);
  40         this.dataTreeChangeService = Preconditions.checkNotNull(dataTreeChangeService);
  41     }
  42
  43     static DataTreeChangeService create(final BindingToNormalizedNodeCodec codec,
  44             final DOMDataTreeChangeService dataTreeChangeService) {
  45         return new BindingDOMDataTreeChangeServiceAdapter(codec, dataTreeChangeService);
  46     }
  47
  48     @Override
  49     public <T extends DataObject, L extends DataTreeChangeListener<T>> ListenerRegistration<L> registerDataTreeChangeListener(
  50             final DataTreeIdentifier<T> treeId, final L listener) {
  51         final DOMDataTreeIdentifier domIdentifier = toDomTreeIdentifier(treeId);
  52         final BindingDOMDataTreeChangeListenerAdapter<T> domListener = new BindingDOMDataTreeChangeListenerAdapter<>(codec,listener, treeId.getDatastoreType());
  53         final ListenerRegistration<BindingDOMDataTreeChangeListenerAdapter<T>> domReg = 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 }