opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/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.controller.md.sal.binding.impl;
   9
  10 import com.google.common.base.Preconditions;
  11 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  12 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
  13 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeService;
  14 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  15 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeService;
  16 import org.opendaylight.controller.md.sal.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 /**
  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
  53         @SuppressWarnings({ "rawtypes", "unchecked" })
  54         final BindingDOMDataTreeChangeListenerAdapter<T> domListener =
  55                 listener instanceof ClusteredDataTreeChangeListener ?
  56                         new BindingClusteredDOMDataTreeChangeListenerAdapter<>(
  57                                 codec, (ClusteredDataTreeChangeListener) listener, treeId.getDatastoreType()) :
  58                         new BindingDOMDataTreeChangeListenerAdapter<>(codec, listener, treeId.getDatastoreType());
  59
  60         final ListenerRegistration<BindingDOMDataTreeChangeListenerAdapter<T>> domReg =
  61                 dataTreeChangeService.registerDataTreeChangeListener(domIdentifier, domListener);
  62         return new BindingDataTreeChangeListenerRegistration<>(listener,domReg);
  63     }
  64
  65     private DOMDataTreeIdentifier toDomTreeIdentifier(final DataTreeIdentifier<?> treeId) {
  66         final YangInstanceIdentifier domPath = codec.toYangInstanceIdentifierBlocking(treeId.getRootIdentifier());
  67         return new DOMDataTreeIdentifier(treeId.getDatastoreType(), domPath);
  68     }
  69 }