1 files changed, 80 insertions, 0 deletions
diff --git a/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/VppNodeWriter.java b/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/VppNodeWriter.java
new file mode 100644
index 000000000..c513e8cd7
--- /dev/null
+++ b/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/VppNodeWriter.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2017 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.vpp.classifier.write;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import io.fd.hc2vpp.common.translate.util.FutureJVppCustomizer;
+import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
+import io.fd.hc2vpp.vpp.classifier.context.VppClassifierContextManager;
+import io.fd.honeycomb.translate.MappingContext;
+import io.fd.honeycomb.translate.read.ReadFailedException;
+import io.fd.honeycomb.translate.write.WriteFailedException;
+import io.fd.vpp.jvpp.VppBaseCallException;
+import io.fd.vpp.jvpp.core.dto.GetNextIndex;
+import io.fd.vpp.jvpp.core.dto.GetNextIndexReply;
+import io.fd.vpp.jvpp.core.future.FutureJVppCore;
+import java.util.concurrent.CompletionStage;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.VppNode;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.vpp.classifier.ClassifyTable;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+abstract class VppNodeWriter extends FutureJVppCustomizer implements JvppReplyConsumer {
+
+    protected VppNodeWriter(@Nonnull final FutureJVppCore futureJvpp) {
+        super(futureJvpp);
+    }
+
+    protected int getNodeIndex(@Nonnull final VppNode node, @Nonnull final ClassifyTable classifyTable,
+                               @Nonnull final VppClassifierContextManager vppClassifierContextManager,
+                               @Nonnull final MappingContext ctx, @Nonnull final InstanceIdentifier<?> id)
+            throws VppBaseCallException, WriteFailedException {
+        if (node.getPacketHandlingAction() != null) {
+            return node.getPacketHandlingAction().getIntValue();
+        } else {
+            return nodeNameToIndex(classifyTable, node.getVppNodeName().getValue(), vppClassifierContextManager, ctx,
+                    id);
+        }
+    }
+
+    private int nodeNameToIndex(@Nonnull final ClassifyTable classifyTable, @Nonnull final String nextNodeName,
+                                @Nonnull final VppClassifierContextManager vppClassifierContextManager,
+                                @Nonnull final MappingContext ctx, @Nonnull final InstanceIdentifier<?> id)
+            throws WriteFailedException {
+        checkArgument(classifyTable != null && classifyTable.getClassifierNode() != null,
+                "to use relative node names, table classifier node needs to be provided");
+        final GetNextIndex request = new GetNextIndex();
+        request.nodeName = classifyTable.getClassifierNode().getValue().getBytes();
+        request.nextName = nextNodeName.getBytes();
+        final CompletionStage<GetNextIndexReply> getNextIndexCompletionStage =
+                getFutureJVpp().getNextIndex(request);
+
+        final GetNextIndexReply reply;
+        try {
+            reply = getReplyForRead(getNextIndexCompletionStage.toCompletableFuture(), id);
+
+            // vpp does not provide relative node index to node name conversion (https://jira.fd.io/browse/VPP-219)
+            // as a workaround we need to add mapping to vpp-classfier-context
+            vppClassifierContextManager.addNodeName(classifyTable.getName(), reply.nextIndex, nextNodeName, ctx);
+        } catch (ReadFailedException e) {
+            throw new WriteFailedException(id, String.format("Failed to get node index for %s relative to %s",
+                    nextNodeName, classifyTable.getClassifierNode()), e);
+        }
+        return reply.nextIndex;
+    }
+}