[SONA] OpenstackSwitching : network() and subnet()

- Added subnet information to OpenstackNetwork class
- Added a new interface, subnet() to return the subnet information.

Change-Id: Ib46455b297909275ba36659efaee2320a111a65e

@@ -15,6 +15,8 @@
  */
 package org.onosproject.openstackswitching;
 
+import java.util.Collection;
+
 import static com.google.common.base.Preconditions.checkNotNull;
 
 
@@ -28,6 +30,7 @@ public final class OpenstackNetwork {
     private String segmentId;
     private String id;
     private NetworkType networkType;
+    private Collection<OpenstackSubnet> subnets;
 
     public enum NetworkType {
         /**
@@ -49,12 +52,13 @@ public final class OpenstackNetwork {
     }
 
     private OpenstackNetwork(String name, String tenantId, String id, String sid,
-                             NetworkType type) {
+                             NetworkType type, Collection<OpenstackSubnet> subnets) {
         this.name = checkNotNull(name);
         this.tenantId = checkNotNull(tenantId);
         this.segmentId = checkNotNull(sid);
         this.id = checkNotNull(id);
         this.networkType = type;
+        this.subnets = subnets;
     }
 
     public String name() {
@@ -77,6 +81,10 @@ public final class OpenstackNetwork {
         return this.networkType;
     }
 
+    public Collection<OpenstackSubnet> subnets() {
+        return this.subnets;
+    }
+
     @Override
     protected Object clone() throws CloneNotSupportedException {
        return super.clone();
@@ -88,6 +96,7 @@ public final class OpenstackNetwork {
         private String id;
         private String sid;
         private NetworkType networkType;
+        private Collection<OpenstackSubnet> subnets;
 
         public Builder name(String name) {
             this.name = name;
@@ -119,9 +128,14 @@ public final class OpenstackNetwork {
             return this;
         }
 
-        public OpenstackNetwork build() {
-            return new OpenstackNetwork(name, tenantId, id, sid, networkType);
+        public Builder subnets(Collection<OpenstackSubnet> subnets) {
+            this.subnets = subnets;
+
+            return this;
         }
 
+        public OpenstackNetwork build() {
+            return new OpenstackNetwork(name, tenantId, id, sid, networkType, subnets);
+        }
     }
 }

@@ -86,8 +86,16 @@ public interface OpenstackSwitchingService {
      * Returns network information list for the network ID given.
      *
      * @param networkId Network ID
-     * @return network information list
+     * @return network information list, or null if not present
      */
     OpenstackNetwork network(String networkId);
 
+
+    /**
+     * Returns subnet information for the subnet ID give.
+     *
+     * @param subnetId Subnet ID
+     * @return subnet information, or null if not present
+     */
+    OpenstackSubnet subnet(String subnetId);
 }

@@ -210,10 +210,41 @@ public class OpenstackSwitchingManager implements OpenstackSwitchingService {
 
     @Override
     public OpenstackNetwork network(String networkId) {
-        Collection<OpenstackNetwork> networks = restHandler.getNetworks();
-        return networks.stream()
-                .filter(n -> n.id().equals(networkId))
-                .findFirst().orElse(null);
+        try {
+            Collection<OpenstackSubnet> subnets = restHandler.getSubnets().stream()
+                    .filter(s -> s.networkId().equals(networkId))
+                    .collect(Collectors.toList());
+
+            Collection<OpenstackNetwork> networks = restHandler.getNetworks();
+            OpenstackNetwork openstackNetwork = networks.stream()
+                    .filter(n -> n.id().equals(networkId))
+                    .findFirst().get();
+
+            return OpenstackNetwork.builder()
+                    .id(openstackNetwork.id())
+                    .name(openstackNetwork.name())
+                    .networkType(openstackNetwork.networkType())
+                    .segmentId(openstackNetwork.segmentId())
+                    .tenantId(openstackNetwork.tenantId())
+                    .subnets(subnets)
+                    .build();
+        } catch (NoSuchElementException e) {
+            log.warn("There is no network infor for net ID {}", networkId);
+            return null;
+        }
+    }
+
+    @Override
+    public OpenstackSubnet subnet(String subnetId) {
+        Collection<OpenstackSubnet> subnets = restHandler.getSubnets();
+        try {
+            return subnets.stream()
+                    .filter(s -> s.id().equals(subnetId))
+                    .findFirst().get();
+        } catch (NoSuchElementException e) {
+            log.warn("There is no subnet info for subnet ID {}", subnetId);
+            return null;
+        }
     }
 
     private void processDeviceAdded(Device device) {