Application manages the IP layer topology information - Interfaces

Change-Id: Ie1dea035674ee98583e98a82cca7e33ab0858b92
diff --git a/apps/iptopology-api/src/main/java/org/onosproject/iptopology/api/device/IpDeviceService.java b/apps/iptopology-api/src/main/java/org/onosproject/iptopology/api/device/IpDeviceService.java
new file mode 100644
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+++ b/apps/iptopology-api/src/main/java/org/onosproject/iptopology/api/device/IpDeviceService.java
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+/*
+ * Copyright 2014-2015 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.iptopology.api.device;
+
+import org.onosproject.event.ListenerService;
+import org.onosproject.iptopology.api.DeviceIntf;
+import org.onosproject.iptopology.api.DevicePrefix;
+import org.onosproject.iptopology.api.InterfaceIdentifier;
+import org.onosproject.iptopology.api.IpDevice;
+import org.onosproject.net.DeviceId;
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.Ip6Address;
+
+import java.util.List;
+
+/**
+ * Service for interacting with the inventory of ip devices.
+ */
+public interface IpDeviceService
+    extends ListenerService<IpDeviceEvent, IpDeviceListener> {
+
+    /**
+     * Returns the number of ip devices known to the system.
+     *
+     * @return number of infrastructure devices
+     */
+    int getIpDeviceCount();
+
+    /**
+     * Returns a collection of the currently known ip
+     * devices.
+     *
+     * @return collection of devices
+     */
+    Iterable<IpDevice> getIpDevices();
+
+    /**
+     * Returns a collection of the currently known ip
+     * devices by device type.
+     *
+     * @param type device type
+     * @return collection of devices
+     */
+    Iterable<IpDevice> getIpDevices(IpDevice.Type type);
+
+
+    /**
+     * Returns the ip device with the specified identifier.
+     *
+     * @param deviceId device identifier
+     * @return device or null if one with the given identifier is not known
+     */
+    IpDevice getIpDevice(DeviceId deviceId);
+
+    /**
+     * Returns the list of interfaces associated with the device.
+     *
+     * @param deviceId device identifier
+     * @return list of device interfaces
+     */
+    List<DeviceIntf> getInterfaces(DeviceId deviceId);
+
+    /**
+     * Returns the interface with the specified ipv4 address and hosted by the given device.
+     *
+     * @param deviceId   device identifier
+     * @param ipv4Address ipv4 address
+     * @return device interface
+     */
+    DeviceIntf getInterface(DeviceId deviceId, Ip4Address ipv4Address);
+
+    /**
+     * Returns the interface with the specified ipv6 address and hosted by the given device.
+     *
+     * @param deviceId   device identifier
+     * @param ipv6Address ipv6 address
+     * @return device interface
+     */
+    DeviceIntf getInterface(DeviceId deviceId, Ip6Address ipv6Address);
+
+    /**
+     * Returns the interface with the specified interface id and hosted by the given device.
+     *
+     * @param deviceId   device identifier
+     * @param intfId interface id
+     * @return device interface
+     */
+    DeviceIntf getInterface(DeviceId deviceId, InterfaceIdentifier intfId);
+
+    /**
+     * Returns the list of ip prefix associated with the device.
+     *
+     * @param deviceId device identifier
+     * @return list of device prefixes
+     */
+    List<DevicePrefix> getPrefixes(DeviceId deviceId);
+
+}