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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.data;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.util.concurrent.CheckedFuture;
import com.google.common.util.concurrent.Futures;
import io.fd.honeycomb.v3po.impl.trans.VppReader;
import java.util.Map;
import javax.annotation.Nonnull;
import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* ReadableVppDataTree implementation for operational data.
*/
public final class VppOperationalDataTree implements ReadableVppDataTree {
private static final Logger LOG = LoggerFactory.getLogger(VppOperationalDataTree.class);
private final BindingNormalizedNodeSerializer serializer;
private final VppReader reader;
/**
* Creates operational data tree instance.
*
* @param serializer service for serialization between Java Binding Data representation and NormalizedNode
* representation.
* @param reader service for translation between Vpp and Java Binding Data.
*/
public VppOperationalDataTree(@Nonnull BindingNormalizedNodeSerializer serializer,
@Nonnull VppReader reader) {
this.serializer = Preconditions.checkNotNull(serializer, "serializer should not be null");
this.reader = Preconditions.checkNotNull(reader, "reader should not be null");
}
@Override
public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(
final YangInstanceIdentifier yangInstanceIdentifier) {
// TODO What if the path is ROOT/empty?
final InstanceIdentifier<?> path = serializer.fromYangInstanceIdentifier(yangInstanceIdentifier);
LOG.debug("VppOperationalDataProxy.read(), path={}", path);
final DataObject dataObject = reader.read(path); // FIXME we need to expect a list of dataObjects here
return Futures.immediateCheckedFuture(toNormalizedNode(path, dataObject));
}
private Optional<NormalizedNode<?, ?>> toNormalizedNode(final InstanceIdentifier path,
final DataObject dataObject) {
LOG.trace("VppOperationalDataProxy.toNormalizedNode(), path={}, path={}", path, dataObject);
final Map.Entry<YangInstanceIdentifier, NormalizedNode<?, ?>> entry =
serializer.toNormalizedNode(path, dataObject);
final NormalizedNode<?, ?> value = entry.getValue();
LOG.trace("VppOperationalDataProxy.toNormalizedNode(), value={}", value);
final Optional<NormalizedNode<?, ?>> optional = Optional.<NormalizedNode<?, ?>>fromNullable(value);
LOG.trace("VppOperationalDataProxy.toNormalizedNode(), optional={}", optional);
return optional;
}
}
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