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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.write.DataValidationFailedException;
import io.fd.honeycomb.translate.write.Validator;
import io.fd.honeycomb.translate.write.WriteContext;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.Policy;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
final class PolicyValidator implements Validator<Policy> {
@Override
public void validateWrite(@Nonnull final InstanceIdentifier<Policy> id, @Nonnull final Policy dataAfter,
@Nonnull final WriteContext writeContext)
throws DataValidationFailedException.CreateValidationFailedException {
try {
validatePolicy(id, dataAfter);
} catch (RuntimeException e) {
throw new DataValidationFailedException.CreateValidationFailedException(id, dataAfter, e);
}
}
private void validatePolicy(final InstanceIdentifier<Policy> id, final Policy policy) {
// 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 (policy.getNat64Prefixes() != null) {
final int prefixCount = policy.getNat64Prefixes().size();
checkArgument(prefixCount <= 1, "Only single nat64-prefix is supported, but %s given", prefixCount);
}
}
}
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