Implement kubevirt floating IP's class, codec, watcher and APIs

Change-Id: I2111902e86083add8a00af62557fac1e98b7e7fc
diff --git a/apps/kubevirt-networking/app/src/test/java/org/onosproject/kubevirtnetworking/codec/KubevirtFloatingIpJsonMatcher.java b/apps/kubevirt-networking/app/src/test/java/org/onosproject/kubevirtnetworking/codec/KubevirtFloatingIpJsonMatcher.java
new file mode 100644
index 0000000..0bcfa0a
--- /dev/null
+++ b/apps/kubevirt-networking/app/src/test/java/org/onosproject/kubevirtnetworking/codec/KubevirtFloatingIpJsonMatcher.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2021-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.kubevirtnetworking.codec;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import org.hamcrest.Description;
+import org.hamcrest.TypeSafeDiagnosingMatcher;
+import org.onosproject.kubevirtnetworking.api.KubevirtFloatingIp;
+
+/**
+ * Hamcrest matcher for kubevirt router interface.
+ */
+public final class KubevirtFloatingIpJsonMatcher extends TypeSafeDiagnosingMatcher<JsonNode> {
+
+    private final KubevirtFloatingIp floatingIp;
+    private static final String ID = "id";
+    private static final String ROUTER_NAME = "routerName";
+    private static final String POD_NAME = "podName";
+    private static final String FLOATING_IP = "floatingIp";
+    private static final String FIXED_IP = "fixedIp";
+
+    private KubevirtFloatingIpJsonMatcher(KubevirtFloatingIp floatingIp) {
+        this.floatingIp = floatingIp;
+    }
+
+    @Override
+    protected boolean matchesSafely(JsonNode jsonNode, Description description) {
+
+        // check ID
+        String jsonId = jsonNode.get(ID).asText();
+        String id = floatingIp.id();
+        if (!jsonId.equals(id)) {
+            description.appendText("ID was " + jsonId);
+            return false;
+        }
+
+        // check router name
+        String jsonRouterName = jsonNode.get(ROUTER_NAME).asText();
+        String routerName = floatingIp.routerName();
+        if (!jsonRouterName.equals(routerName)) {
+            description.appendText("Router name was " + jsonRouterName);
+            return false;
+        }
+
+        // check floating IP
+        String jsonFip = jsonNode.get(FLOATING_IP).asText();
+        String fip = floatingIp.floatingIp().toString();
+        if (!jsonFip.equals(fip)) {
+            description.appendText("Floating IP was " + jsonFip);
+            return false;
+        }
+
+        // check POD name
+        JsonNode jsonPodName = jsonNode.get(POD_NAME);
+        if (jsonPodName != null) {
+            if (!floatingIp.podName().equals(jsonPodName.asText())) {
+                description.appendText("POD name was " + jsonPodName);
+                return false;
+            }
+        }
+
+        // check fixed IP
+        JsonNode jsonFixedIp = jsonNode.get(FIXED_IP);
+        if (jsonFixedIp != null) {
+            if (!floatingIp.fixedIp().toString().equals(jsonFixedIp.asText())) {
+                description.appendText("Fixed IP was " + jsonFixedIp);
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    @Override
+    public void describeTo(Description description) {
+        description.appendText(floatingIp.toString());
+    }
+
+    /**
+     * Factory to allocate a kubevirt floating IP matcher.
+     *
+     * @param fip kubevirt floating IP object we are looking for
+     * @return matcher
+     */
+    public static KubevirtFloatingIpJsonMatcher matchesKubevirtFloatingIp(KubevirtFloatingIp fip) {
+        return new KubevirtFloatingIpJsonMatcher(fip);
+    }
+}