binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/osgi/AbstractAdaptedService.java

   1 /*
   2  * Copyright (c) 2020 PANTHEON.tech, s.r.o. 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.osgi;
   9
  10 import static com.google.common.base.Verify.verifyNotNull;
  11 import static java.util.Objects.requireNonNull;
  12
  13 import java.util.Map;
  14 import org.eclipse.jdt.annotation.NonNull;
  15 import org.eclipse.jdt.annotation.Nullable;
  16 import org.opendaylight.mdsal.binding.api.BindingService;
  17 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19
  20 abstract class AbstractAdaptedService<B extends BindingService> {
  21     private static final Logger LOG = LoggerFactory.getLogger(AbstractAdaptedService.class);
  22     static final @NonNull String DELEGATE =
  23             "org.opendaylight.mdsal.binding.dom.adapter.osgi.AbstractAdaptedService.DELEGATE";
  24
  25     private final Class<B> bindingService;
  26
  27     private @Nullable B delegate;
  28
  29     AbstractAdaptedService(final Class<B> bindingService) {
  30         this.bindingService = requireNonNull(bindingService);
  31     }
  32
  33     final void start(final Map<String, ?> properties) {
  34         delegate = bindingService.cast(verifyNotNull(properties.get(DELEGATE)));
  35         LOG.info("Binding/DOM adapter for {} activated", bindingService.getSimpleName());
  36     }
  37
  38     final void stop(final int reason) {
  39         delegate = null;
  40         LOG.info("Binding/DOM adapter for {} deactivated (reason {})", bindingService.getSimpleName(), reason);
  41     }
  42
  43     final @NonNull B delegate() {
  44         return verifyNotNull(delegate);
  45     }
  46 }