Add Kubevirt Port and Instance classes with CURD interfaces

Change-Id: I1afbba8a04bc1872cc1c086f2e3a15620533d517
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtPort.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtPort.java
new file mode 100644
index 0000000..049a336
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtPort.java
@@ -0,0 +1,169 @@
+/*
+ * 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.api;
+
+import com.google.common.base.MoreObjects;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+/**
+ * Default implementation of kubernetes port.
+ */
+public final class DefaultKubevirtPort implements KubevirtPort {
+
+    private static final String NOT_NULL_MSG = "Port % cannot be null";
+
+    private final MacAddress macAddress;
+    private final IpAddress ipAddress;
+    private final DeviceId deviceId;
+    private final PortNumber portNumber;
+
+    /**
+     * Default constructor.
+     *
+     * @param macAddress        MAC address
+     * @param ipAddress         IP address
+     * @param deviceId          device identifier
+     * @param portNumber        port number
+     */
+    public DefaultKubevirtPort(MacAddress macAddress, IpAddress ipAddress,
+                               DeviceId deviceId, PortNumber portNumber) {
+        this.macAddress = macAddress;
+        this.ipAddress = ipAddress;
+        this.deviceId = deviceId;
+        this.portNumber = portNumber;
+    }
+
+    @Override
+    public MacAddress macAddress() {
+        return macAddress;
+    }
+
+    @Override
+    public IpAddress ipAddress() {
+        return ipAddress;
+    }
+
+    @Override
+    public DeviceId deviceId() {
+        return deviceId;
+    }
+
+    @Override
+    public PortNumber portNumber() {
+        return portNumber;
+    }
+
+    @Override
+    public KubevirtPort updatePortNumber(PortNumber portNumber) {
+        return null;
+    }
+
+    @Override
+    public KubevirtPort updateDeviceId(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        DefaultKubevirtPort that = (DefaultKubevirtPort) o;
+        return macAddress.equals(that.macAddress) && ipAddress.equals(that.ipAddress) &&
+                deviceId.equals(that.deviceId) && portNumber.equals(that.portNumber);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(macAddress, ipAddress, deviceId, portNumber);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this)
+                .add("macAddress", macAddress)
+                .add("ipAddress", ipAddress)
+                .add("deviceId", deviceId)
+                .add("portNumber", portNumber)
+                .toString();
+    }
+
+    /**
+     * Returns new builder instance.
+     *
+     * @return kubevirt port builder
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Default builder implementation.
+     */
+    public static final class Builder implements KubevirtPort.Builder {
+
+        private MacAddress macAddress;
+        private IpAddress ipAddress;
+        private DeviceId deviceId;
+        private PortNumber portNumber;
+
+        // private constructor not intended to use from external
+        private Builder() {
+        }
+
+        @Override
+        public KubevirtPort build() {
+            checkArgument(macAddress != null, NOT_NULL_MSG, "macAddress");
+            checkArgument(ipAddress != null, NOT_NULL_MSG, "ipAddress");
+
+            return new DefaultKubevirtPort(macAddress, ipAddress, deviceId, portNumber);
+        }
+
+        @Override
+        public Builder macAddress(MacAddress macAddress) {
+            this.macAddress = macAddress;
+            return this;
+        }
+
+        @Override
+        public Builder ipAddress(IpAddress ipAddress) {
+            this.ipAddress = ipAddress;
+            return this;
+        }
+
+        @Override
+        public Builder deviceId(DeviceId deviceId) {
+            this.deviceId = deviceId;
+            return this;
+        }
+
+        @Override
+        public Builder portNumber(PortNumber portNumber) {
+            this.portNumber = portNumber;
+            return this;
+        }
+    }
+}