1 files changed, 72 insertions, 0 deletions
diff --git a/nat/nat2vpp/src/main/java/io/fd/honeycomb/nat/read/ifc/AbstractInterfaceNatCustomizer.java b/nat/nat2vpp/src/main/java/io/fd/honeycomb/nat/read/ifc/AbstractInterfaceNatCustomizer.java
new file mode 100644
index 000000000..441218a3f
--- /dev/null
+++ b/nat/nat2vpp/src/main/java/io/fd/honeycomb/nat/read/ifc/AbstractInterfaceNatCustomizer.java
@@ -0,0 +1,72 @@
+/*
+ * 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.nat.read.ifc;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.translate.read.ReadContext;
+import io.fd.honeycomb.translate.read.ReadFailedException;
+import io.fd.honeycomb.translate.spi.read.InitializingReaderCustomizer;
+import io.fd.honeycomb.translate.util.read.cache.DumpCacheManager;
+import io.fd.honeycomb.translate.vpp.util.NamingContext;
+import io.fd.vpp.jvpp.snat.dto.SnatInterfaceDetails;
+import io.fd.vpp.jvpp.snat.dto.SnatInterfaceDetailsReplyDump;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface;
+import org.opendaylight.yangtools.concepts.Builder;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+
+abstract class AbstractInterfaceNatCustomizer<C extends DataObject, B extends Builder<C>>
+        implements InitializingReaderCustomizer<C, B> {
+
+    private final DumpCacheManager<SnatInterfaceDetailsReplyDump, Void> dumpMgr;
+    private final NamingContext ifcContext;
+
+    AbstractInterfaceNatCustomizer(@Nonnull final DumpCacheManager<SnatInterfaceDetailsReplyDump, Void> dumpMgr,
+                                   @Nonnull final NamingContext ifcContext) {
+        this.dumpMgr = dumpMgr;
+        this.ifcContext = ifcContext;
+    }
+
+    @Override
+    public void readCurrentAttributes(@Nonnull final InstanceIdentifier<C> id,
+                                      @Nonnull final B builder,
+                                      @Nonnull final ReadContext ctx) throws ReadFailedException {
+        final String ifcName = id.firstKeyOf(Interface.class).getName();
+        getLog().debug("Reading NAT features on interface: {}", ifcName);
+        final int index = ifcContext.getIndex(ifcName, ctx.getMappingContext());
+
+        // Cache dump for each interface under the same key since this is all ifc dump
+        final Optional<SnatInterfaceDetailsReplyDump> dump =
+                dumpMgr.getDump(id, getClass().getName(), ctx.getModificationCache(), null);
+
+        // Find entries for current ifc and if is marked as inside set the builder to return presence container
+        dump.or(new SnatInterfaceDetailsReplyDump()).snatInterfaceDetails.stream()
+                .filter(snatIfcDetail -> snatIfcDetail.swIfIndex == index)
+                .filter(this::isExpectedNatType)
+                .findFirst()
+                .ifPresent(snatIfcDetail -> setBuilderPresence(builder));
+        // Not setting data, just marking the builder to propagate empty container to indicate presence
+    }
+
+    protected abstract Logger getLog();
+
+    abstract void setBuilderPresence(@Nonnull final B builder);
+
+    abstract boolean isExpectedNatType(final SnatInterfaceDetails snatInterfaceDetails);
+}