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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.fd.honeycomb.v3po.impl.trans.w.util;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.collect.Iterables;
import io.fd.honeycomb.v3po.impl.trans.util.VppRWUtils;
import io.fd.honeycomb.v3po.impl.trans.w.VppWriter;
import io.fd.honeycomb.v3po.impl.trans.w.WriteContext;
import java.util.List;
import java.util.Map;
import javax.annotation.Nonnull;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Simple reader registry able to perform and aggregated read (ROOT read) on top of all
* provided readers. Also able to delegate a specific read to one of the delegate readers.
*
* This could serve as a utility to hold & hide all available readers in upper layers.
*/
public final class DelegatingWriterRegistry implements VppWriter<DataObject> {
private final Map<Class<? extends DataObject>, VppWriter<? extends DataObject>> rootReaders;
/**
* Create new {@link DelegatingWriterRegistry}
*
* @param rootReaders List of delegate readers
*/
public DelegatingWriterRegistry(@Nonnull final List<VppWriter<? extends DataObject>> rootReaders) {
this.rootReaders = VppRWUtils.uniqueLinkedIndex(checkNotNull(rootReaders), VppRWUtils.MANAGER_CLASS_FUNCTION);
}
/**
* @throws UnsupportedOperationException This getter is not supported for reader registry since it does not manage a
* specific node type
*/
@Nonnull
@Override
public InstanceIdentifier<DataObject> getManagedDataObjectType() {
throw new UnsupportedOperationException("Root registry has no type");
}
@Override
public void update(@Nonnull final InstanceIdentifier<? extends DataObject> id,
@Nonnull final List<? extends DataObject> dataBefore,
@Nonnull final List<? extends DataObject> dataAfter,
@Nonnull final WriteContext ctx) {
final InstanceIdentifier.PathArgument first = checkNotNull(
Iterables.getFirst(id.getPathArguments(), null), "Empty id");
final VppWriter<? extends DataObject> vppWriter = rootReaders.get(first.getType());
checkNotNull(vppWriter,
"Unable to write %s. Missing writer. Current writers for: %s", id, rootReaders.keySet());
vppWriter.update(id, dataBefore, dataAfter, ctx);
}
}
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