2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.controller.md.sal.binding.spi;
11 import com.google.common.base.Preconditions;
12 import com.google.common.collect.ClassToInstanceMap;
13 import com.google.common.collect.ImmutableClassToInstanceMap;
14 import com.google.common.collect.MutableClassToInstanceMap;
16 import org.opendaylight.yangtools.concepts.Builder;
18 public abstract class AdapterBuilder<T,D> implements Builder<T> {
20 private final ClassToInstanceMap<D> delegates = MutableClassToInstanceMap.create();
22 public abstract Set<? extends Class<? extends D>> getRequiredDelegates();
24 protected abstract T createInstance(ClassToInstanceMap<D> delegates);
26 private void checkAllRequiredServices() {
27 for(final Class<? extends D> type : getRequiredDelegates()) {
28 Preconditions.checkState(delegates.get(type) != null, "Requires service %s is not defined.",type);
32 public final <V extends D>void addDelegate(final Class<V> type,final D impl) {
33 delegates.put(type,impl);
37 public final T build() {
38 checkAllRequiredServices();
39 return createInstance(ImmutableClassToInstanceMap.<D,D>copyOf(delegates));