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/*
* Copyright (c) 2018 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.hc2vpp.nat.write;
import static com.google.common.base.Preconditions.checkArgument;
import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.Instance;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.Policy;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.PolicyKey;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
final class PolicyCustomizer implements ListWriterCustomizer<Policy, PolicyKey> {
private static final Logger LOG = LoggerFactory.getLogger(PolicyCustomizer.class);
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Policy> id,
@Nonnull final Policy dataAfter, @Nonnull final WriteContext writeContext)
throws WriteFailedException {
LOG.trace("Writing NAT policy: {}", id);
// HC supports only single NAT policy per NAT instance (VRF)
// To ensure that (and for simplicity), we require policy id = 0.
final Long policyId = id.firstKeyOf(Policy.class).getId();
checkArgument(policyId == 0,
"Only single policy per NAT instance (VRF) is supported (expected id=0, but %s given)", policyId);
if (dataAfter.getNat64Prefixes() != null) {
final int prefixCount = dataAfter.getNat64Prefixes().size();
checkArgument(prefixCount <= 1, "Only single nat64-prefix is supported, but %s given", prefixCount);
}
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Policy> id,
@Nonnull final Policy dataBefore, @Nonnull final WriteContext writeContext)
throws WriteFailedException {
LOG.trace("Deleting NAT policy: {}", id);
}
}
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