Initial import of CFM and SOAM api

Change-Id: Icf5cc2d5fb34b75460e80e8cced0d70265bcd33b
diff --git a/apps/cfm/src/main/java/org/onosproject/soam/web/LmEntryCodec.java b/apps/cfm/src/main/java/org/onosproject/soam/web/LmEntryCodec.java
new file mode 100644
index 0000000..251bcd9
--- /dev/null
+++ b/apps/cfm/src/main/java/org/onosproject/soam/web/LmEntryCodec.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.soam.web;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.incubator.net.l2monitoring.soam.loss.LossMeasurementEntry;
+
+import java.util.Iterator;
+import java.util.Map.Entry;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Encode and decode to/from JSON to LossMeasurementEntry object.
+ */
+public class LmEntryCodec extends JsonCodec<LossMeasurementEntry> {
+
+    @Override
+    public ObjectNode encode(LossMeasurementEntry lm, CodecContext context) {
+        checkNotNull(lm, "LM cannot be null");
+        ObjectNode result = context.mapper().createObjectNode()
+                .put("lmId", lm.lmId().toString());
+
+        if (lm.measuredForwardFlr() != null) {
+            result.put("measuredForwardFlr", lm.measuredForwardFlr().percentValue());
+        }
+        if (lm.measuredBackwardFlr() != null) {
+            result.put("measuredBackwardFlr", lm.measuredBackwardFlr().percentValue());
+        }
+        if (lm.measuredAvailabilityForwardStatus() != null) {
+            result.put("measuredAvailabilityForwardStatus",
+                    lm.measuredAvailabilityForwardStatus().name());
+        }
+        if (lm.measuredAvailabilityBackwardStatus() != null) {
+            result.put("measuredAvailabilityBackwardStatus",
+                    lm.measuredAvailabilityBackwardStatus().name());
+        }
+        if (lm.measuredForwardLastTransitionTime() != null) {
+            result.put("measuredForwardLastTransitionTime",
+                    lm.measuredForwardLastTransitionTime().toString());
+        }
+        if (lm.measuredBackwardLastTransitionTime() != null) {
+            result.put("measuredBackwardLastTransitionTime",
+                    lm.measuredBackwardLastTransitionTime().toString());
+        }
+
+        ObjectNode lmAttrs = new LmCreateCodec().encode(lm, context);
+        Iterator<Entry<String, JsonNode>> elements = lmAttrs.fields();
+        while (elements.hasNext()) {
+            Entry<String, JsonNode> element = elements.next();
+            result.set(element.getKey(), element.getValue());
+        }
+
+        if (lm.measurementCurrent() != null) {
+            result.set("measurementCurrent", new LossMeasurementStatCurrentCodec()
+                    .encode(lm.measurementCurrent(), context));
+        }
+
+        if (lm.measurementHistories() != null) {
+            result.set("measurementHistories", new LossMeasurementStatHistoryCodec()
+                    .encode(lm.measurementHistories(), context));
+        }
+
+        if (lm.availabilityCurrent() != null) {
+            result.set("availabilityCurrent", new LossAvailabilityStatCurrentCodec()
+                    .encode(lm.availabilityCurrent(), context));
+        }
+
+        if (lm.availabilityHistories() != null) {
+            result.set("availabilityHistories", new LossAvailabilityStatHistoryCodec()
+                    .encode(lm.availabilityHistories(), context));
+        }
+
+        return result;
+    }
+
+    @Override
+    public ArrayNode encode(Iterable<LossMeasurementEntry> lmEntities, CodecContext context) {
+        ArrayNode an = context.mapper().createArrayNode();
+        lmEntities.forEach(dm -> an.add(encode(dm, context)));
+        return an;
+    }
+}