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.DataTreeChangeListener;
  12 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeService;
  13 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  14 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeService;
  15 import org.opendaylight.controller.md.sal.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 /**
  22  *
  23  * Adapter exposing Binding {@link DataTreeChangeService} and wrapping
  24  * {@link DOMDataTreeChangeService} and is responsible for translation
  25  * and instantiation of {@link BindingDOMDataTreeChangeListenerAdapter}
  26  * adapters.
  27  *
  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> registerDataTreeChangeListener(
  49             final DataTreeIdentifier<T> treeId, final L listener) {
  50         final DOMDataTreeIdentifier domIdentifier = toDomTreeIdentifier(treeId);
  51         final BindingDOMDataTreeChangeListenerAdapter<T> domListener = new BindingDOMDataTreeChangeListenerAdapter<>(codec,listener, treeId.getDatastoreType());
  52         final ListenerRegistration<BindingDOMDataTreeChangeListenerAdapter<T>> domReg = dataTreeChangeService.registerDataTreeChangeListener(domIdentifier, domListener);
  53         return new BindingDataTreeChangeListenerRegistration<>(listener,domReg);
  54     }
  55
  56     private DOMDataTreeIdentifier toDomTreeIdentifier(final DataTreeIdentifier<?> treeId) {
  57         final YangInstanceIdentifier domPath = codec.toYangInstanceIdentifierBlocking(treeId.getRootIdentifier());
  58         return new DOMDataTreeIdentifier(treeId.getDatastoreType(), domPath);
  59     }
  60 }