[ONOS-6170] Implement codec for MappingInstruction primitives
Change-Id: Ib372de863e6d730c55326ef3450d6f79478592b5
diff --git a/apps/mappingmanagement/web/src/main/java/org/onosproject/mapping/web/codec/EncodeMappingInstructionCodecHelper.java b/apps/mappingmanagement/web/src/main/java/org/onosproject/mapping/web/codec/EncodeMappingInstructionCodecHelper.java
new file mode 100644
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+++ b/apps/mappingmanagement/web/src/main/java/org/onosproject/mapping/web/codec/EncodeMappingInstructionCodecHelper.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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 org.onosproject.mapping.web.codec;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.mapping.instructions.MappingInstruction;
+import org.onosproject.mapping.instructions.MulticastMappingInstruction;
+import org.onosproject.mapping.instructions.UnicastMappingInstruction;
+import org.slf4j.Logger;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * JSON encoding of MappingInstructions.
+ */
+public final class EncodeMappingInstructionCodecHelper {
+ protected static final Logger log = getLogger(EncodeMappingInstructionCodecHelper.class);
+ private final MappingInstruction instruction;
+ private final CodecContext context;
+
+ /**
+ * Creates a mapping instruction object encoder.
+ *
+ * @param instruction mapping instruction to encode
+ * @param context codec context for the encoding
+ */
+ public EncodeMappingInstructionCodecHelper(MappingInstruction instruction,
+ CodecContext context) {
+ this.instruction = instruction;
+ this.context = context;
+ }
+
+ /**
+ * Encodes an unicast mapping instruction.
+ *
+ * @param result json node that the mapping instruction
+ * attributes are added to
+ */
+ private void encodeUnicast(ObjectNode result) {
+ UnicastMappingInstruction unicastInstruction =
+ (UnicastMappingInstruction) instruction;
+ result.put(MappingInstructionCodec.SUBTYPE, unicastInstruction.subtype().name());
+
+ switch (unicastInstruction.subtype()) {
+ case WEIGHT:
+ UnicastMappingInstruction.WeightMappingInstruction wmi =
+ (UnicastMappingInstruction.WeightMappingInstruction)
+ unicastInstruction;
+ result.put(MappingInstructionCodec.UNICAST_WEIGHT, wmi.weight());
+ break;
+ case PRIORITY:
+ UnicastMappingInstruction.PriorityMappingInstruction pmi =
+ (UnicastMappingInstruction.PriorityMappingInstruction)
+ unicastInstruction;
+ result.put(MappingInstructionCodec.UNICAST_PRIORITY, pmi.priority());
+ break;
+ default:
+ log.info("Cannot convert unicast subtype of {}",
+ unicastInstruction.subtype());
+ }
+ }
+
+ /**
+ * Encodes a multicast mapping instruction.
+ *
+ * @param result json node that the mapping instruction
+ * attributes are added to
+ */
+ private void encodeMulticast(ObjectNode result) {
+ MulticastMappingInstruction multicastMappingInstruction =
+ (MulticastMappingInstruction) instruction;
+ result.put(MappingInstructionCodec.SUBTYPE, multicastMappingInstruction.subtype().name());
+
+ switch (multicastMappingInstruction.subtype()) {
+ case WEIGHT:
+ MulticastMappingInstruction.WeightMappingInstruction wmi =
+ (MulticastMappingInstruction.WeightMappingInstruction)
+ multicastMappingInstruction;
+ result.put(MappingInstructionCodec.MULTICAST_WEIGHT, wmi.weight());
+ break;
+ case PRIORITY:
+ MulticastMappingInstruction.PriorityMappingInstruction pmi =
+ (MulticastMappingInstruction.PriorityMappingInstruction)
+ multicastMappingInstruction;
+ result.put(MappingInstructionCodec.MULTICAST_PRIORITY, pmi.priority());
+ break;
+ default:
+ log.info("Cannot convert multicast subtype of {}",
+ multicastMappingInstruction.subtype());
+ }
+ }
+
+ /**
+ * Encodes the given mapping instruction into JSON.
+ *
+ * @return JSON object node representing the mapping instruction.
+ */
+ public ObjectNode encode() {
+ final ObjectNode result = context.mapper().createObjectNode()
+ .put(MappingInstructionCodec.TYPE, instruction.type().toString());
+
+ switch (instruction.type()) {
+ case UNICAST:
+ encodeUnicast(result);
+ break;
+ case MULTICAST:
+ encodeMulticast(result);
+ break;
+ default:
+ log.info("Cannot convert mapping instruction type of {}", instruction.type());
+ break;
+ }
+ return result;
+ }
+}