[ODTN] Add read/create/delete ConnectivityService RPC

- RPC: get service interface point
- RPC: get connectivity service list
- RPC: get connectivity service detail
- RPC: create connectivity service
- RPC: delete connectivity service

- Filter method of TAPI resolver for both Node / NEP
- Change condition for sip to odtn-port-type
- Use odtn-port-type in path-computation mock
- Create CEP at topology discovery

- Add sample path calculator
- Add connection-id based path selection

Change-Id: I2f08aacb3dd14b6b3c59a64a349e50abb495f70b
diff --git a/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/tapi/TapiCepRef.java b/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/tapi/TapiCepRef.java
new file mode 100644
index 0000000..15e3ecc
--- /dev/null
+++ b/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/tapi/TapiCepRef.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2018-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.odtn.utils.tapi;
+
+import java.util.Objects;
+import java.util.UUID;
+
+import org.slf4j.Logger;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * TAPI Cep reference class.
+ * <p>
+ * TAPI reference class should be used in ODTN ServiceApplication
+ * in order to make independent ServiceApplication implementation from DCS.
+ */
+public final class TapiCepRef {
+
+    protected final Logger log = getLogger(getClass());
+
+    private final UUID topologyId;
+    private final UUID nodeId;
+    private final UUID nepId;
+    private final UUID cepId;
+
+    private TapiCepRef(String topologyId, String nodeId, String nepId, String cepId) {
+        this.topologyId = UUID.fromString(topologyId);
+        this.nodeId = UUID.fromString(nodeId);
+        this.nepId = UUID.fromString(nepId);
+        this.cepId = UUID.fromString(cepId);
+    }
+
+    public static TapiCepRef create(String topologyId, String nodeId, String nepId, String cepId) {
+        return new TapiCepRef(topologyId, nodeId, nepId, cepId);
+    }
+
+    public static TapiCepRef create(TapiNepRef nepRef, String cepId) {
+        return new TapiCepRef(nepRef.getTopologyId(), nepRef.getNodeId(), nepRef.getNepId(), cepId);
+    }
+
+    public String getTopologyId() {
+        return topologyId.toString();
+    }
+
+    public String getNodeId() {
+        return nodeId.toString();
+    }
+
+    public String getNepId() {
+        return nepId.toString();
+    }
+
+    public String getCepId() {
+        return cepId.toString();
+    }
+
+    public TapiNepRef getNepRef() {
+        return new TapiNepRef(topologyId.toString(), nodeId.toString(), nepId.toString());
+    }
+
+    public String toString() {
+        return toStringHelper(getClass())
+                .add("topologyId", topologyId)
+                .add("nodeId", nodeId)
+                .add("nepId", nepId)
+                .add("cepId", cepId)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof TapiCepRef)) {
+            return false;
+        }
+        TapiCepRef that = (TapiCepRef) o;
+        return Objects.equals(topologyId, that.topologyId) &&
+                Objects.equals(nodeId, that.nodeId) &&
+                Objects.equals(nepId, that.nepId) &&
+                Objects.equals(cepId, that.cepId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(topologyId, nodeId, nepId, cepId);
+    }
+}