HC2VPP-379: move NAT validation code out of customizers

Use Validator interface introduced by HONEYCOMB-431:
https://gerrit.fd.io/r/#/c/14022/

Change-Id: I9e4c8d59f299ed7da4a93bbdc70c81f2bea93606
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/nat/nat2vpp/src/main/java/io/fd/hc2vpp/nat/write/Nat64PrefixesValidator.java b/nat/nat2vpp/src/main/java/io/fd/hc2vpp/nat/write/Nat64PrefixesValidator.java
new file mode 100644
index 000000000..3b6dc9553
--- /dev/null
+++ b/nat/nat2vpp/src/main/java/io/fd/hc2vpp/nat/write/Nat64PrefixesValidator.java
@@ -0,0 +1,41 @@
+/*
+ * 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 java.util.List;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.policy.Nat64Prefixes;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.policy.nat64.prefixes.DestinationIpv4Prefix;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+final class Nat64PrefixesValidator implements Validator<Nat64Prefixes> {
+    @Override
+    public void validateWrite(@Nonnull final InstanceIdentifier<Nat64Prefixes> id,
+                              @Nonnull final Nat64Prefixes dataAfter,
+                              @Nonnull final WriteContext writeContext)
+        throws DataValidationFailedException.CreateValidationFailedException {
+        // VPP does not support configuring different nat64-prefixes depending on ipv4 destination prefix:
+        final List<DestinationIpv4Prefix> destinationIpv4PrefixList = dataAfter.getDestinationIpv4Prefix();
+        checkArgument(destinationIpv4PrefixList == null || destinationIpv4PrefixList.isEmpty(),
+            "destination-ipv4-prefix is not supported by VPP");
+    }
+}