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/*
 * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.mdsal.binding.dom.adapter;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ClassToInstanceMap;
import com.google.common.collect.ImmutableSet;
import java.util.Set;
import org.opendaylight.mdsal.binding.api.RpcService;
import org.opendaylight.mdsal.binding.dom.adapter.BindingDOMAdapterBuilder.Factory;
import org.opendaylight.mdsal.dom.api.DOMRpcService;
import org.opendaylight.mdsal.dom.api.DOMService;
import org.opendaylight.yangtools.binding.Rpc;
import org.opendaylight.yangtools.binding.reflect.BindingReflections;

@VisibleForTesting
public final class BindingDOMRpcServiceAdapter
        extends AbstractBindingLoadingAdapter, RpcAdapter> implements RpcService {
    static final Factory BUILDER_FACTORY = Builder::new;

    public BindingDOMRpcServiceAdapter(final AdapterContext adapterContext, final DOMRpcService domService) {
        super(adapterContext, domService);
    }

    @Override
    public > T getRpc(final Class rpcInterface) {
        return rpcInterface.cast(getAdapter(requireNonNull(rpcInterface)).facade());
    }

    @Override
    RpcAdapter loadAdapter(final Class key) {
        checkArgument(BindingReflections.isBindingClass(key));
        checkArgument(key.isInterface(), "Supplied RPC service type must be interface.");
        if (Rpc.class.isAssignableFrom(key)) {
            return new RpcAdapter(adapterContext(), getDelegate(), key.asSubclass(Rpc.class));
        } else {
            throw new IllegalStateException("Unhandled key " + key);
        }
    }

    private static final class Builder extends BindingDOMAdapterBuilder {
        Builder(final AdapterContext adapterContext) {
            super(adapterContext);
        }

        @Override
        public Set>> getRequiredDelegates() {
            return ImmutableSet.of(DOMRpcService.class);
        }

        @Override
        protected RpcService createInstance(final ClassToInstanceMap> delegates) {
            return new BindingDOMRpcServiceAdapter(adapterContext(), delegates.getInstance(DOMRpcService.class));
        }
    }
}