opendaylight/md-sal/compatibility/sal-compatibility/src/main/java/org/opendaylight/controller/sal/compatibility/NodeMapping.java

   1 /**
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.sal.compatibility;
   9
  10 import com.google.common.annotations.VisibleForTesting;
  11 import com.google.common.base.Objects;
  12 import com.google.common.base.Preconditions;
  13 import java.math.BigInteger;
  14 import java.util.Date;
  15 import java.util.HashSet;
  16 import java.util.List;
  17 import org.opendaylight.controller.sal.common.util.Arguments;
  18 import org.opendaylight.controller.sal.core.AdvertisedBandwidth;
  19 import org.opendaylight.controller.sal.core.Bandwidth;
  20 import org.opendaylight.controller.sal.core.Buffers;
  21 import org.opendaylight.controller.sal.core.Capabilities;
  22 import org.opendaylight.controller.sal.core.Config;
  23 import org.opendaylight.controller.sal.core.ConstructionException;
  24 import org.opendaylight.controller.sal.core.Description;
  25 import org.opendaylight.controller.sal.core.MacAddress;
  26 import org.opendaylight.controller.sal.core.Name;
  27 import org.opendaylight.controller.sal.core.Node.NodeIDType;
  28 import org.opendaylight.controller.sal.core.NodeConnector.NodeConnectorIDType;
  29 import org.opendaylight.controller.sal.core.PeerBandwidth;
  30 import org.opendaylight.controller.sal.core.Property;
  31 import org.opendaylight.controller.sal.core.SupportedBandwidth;
  32 import org.opendaylight.controller.sal.core.Tables;
  33 import org.opendaylight.controller.sal.core.TimeStamp;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FeatureCapability;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNodeConnector;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNodeConnectorUpdated;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNodeUpdated;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowFeatureCapabilityArpMatchIp;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowFeatureCapabilityFlowStats;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowFeatureCapabilityIpReasm;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowFeatureCapabilityPortStats;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowFeatureCapabilityQueueStats;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowFeatureCapabilityStp;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowFeatureCapabilityTableStats;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowNode;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowNodeConnector;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.flow.node.SwitchFeatures;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.PortConfig;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.PortFeatures;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.flow.capable.port.State;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.OutputPortValues;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorId;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorRef;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorUpdated;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeUpdated;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnector;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnectorKey;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
  63 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  64 import org.slf4j.Logger;
  65 import org.slf4j.LoggerFactory;
  66
  67 public final class NodeMapping {
  68
  69     private static final Logger LOG = LoggerFactory
  70             .getLogger(NodeMapping.class);
  71
  72     /**
  73      * openflow id prefix
  74      */
  75     public static final String OPENFLOW_ID_PREFIX = "openflow:";
  76
  77     public final static String MD_SAL_TYPE = "MD_SAL_DEPRECATED";
  78
  79     private final static Class<Node> NODE_CLASS = Node.class;
  80
  81     private final static Class<NodeConnector> NODECONNECTOR_CLASS = NodeConnector.class;
  82
  83     private NodeMapping() {
  84         throw new UnsupportedOperationException("Utility class. Instantiation is not allowed.");
  85     }
  86
  87     public static org.opendaylight.controller.sal.core.Node toADNode(final InstanceIdentifier<? extends Object> node) throws ConstructionException {
  88         NodeId nodeId = NodeMapping.toNodeId(node);
  89         return NodeMapping.toADNode(nodeId);
  90     }
  91
  92     public static org.opendaylight.controller.sal.core.Node toADNode(final NodeId id) throws ConstructionException {
  93         String nodeId = NodeMapping.toADNodeId(id);
  94         String nodeIdasNumber = nodeId.replaceFirst("^.*:", "");
  95         if (isInteger(nodeIdasNumber)) {
  96             Long aDNodeId = openflowFullNodeIdToLong(nodeIdasNumber);
  97             return new org.opendaylight.controller.sal.core.Node(NodeIDType.OPENFLOW, aDNodeId);
  98         } else {
  99             return new org.opendaylight.controller.sal.core.Node(NodeIDType.PRODUCTION, nodeId);
 100         }
 101     }
 102
 103     /**
 104      * @param adNodeId
 105      * @return nodeId as long
 106      */
 107     @VisibleForTesting
 108     public static Long openflowFullNodeIdToLong(String adNodeId) {
 109         if (adNodeId == null) {
 110             return null;
 111         }
 112         return new BigInteger(adNodeId).longValue();
 113     }
 114
 115     public static NodeId toNodeId(final InstanceIdentifier<?> id) {
 116         final NodeKey key = id.firstKeyOf(Node.class, NodeKey.class);
 117         Preconditions.checkArgument(key != null, "No node identifier found in %s", id);
 118         return key.getId();
 119     }
 120
 121     /**
 122      * @param nodeId containing "&lt;NodeTypeString&gt;:&lt;plainIntegerId&gt;"
 123      * @return adNodeId form
 124      */
 125     public static String toADNodeId(final NodeId nodeId) {
 126         if (nodeId == null) {
 127             return null;
 128         }
 129         return nodeId.getValue();
 130     }
 131
 132     public static org.opendaylight.controller.sal.core.NodeConnector toADNodeConnector(final NodeConnectorRef source) throws ConstructionException {
 133         final InstanceIdentifier<?> id = Preconditions.checkNotNull(source.getValue());
 134         final NodeConnectorKey key = id.firstKeyOf(NodeConnector.class, NodeConnectorKey.class);
 135         return NodeMapping.toADNodeConnector(key.getId(), NodeMapping.toNodeId(id));
 136     }
 137
 138     public static org.opendaylight.controller.sal.core.NodeConnector toADNodeConnector(final NodeConnectorId ncid, final NodeId nid) throws ConstructionException {
 139         String nodeConnectorType = NodeMapping.toNodeConnectorType(ncid, nid);
 140         Object aDNodeConnectorId = NodeMapping.toADNodeConnectorId(ncid, nid);
 141         org.opendaylight.controller.sal.core.Node aDNode = NodeMapping.toADNode(nid);
 142         return new org.opendaylight.controller.sal.core.NodeConnector(nodeConnectorType, aDNodeConnectorId, aDNode);
 143     }
 144
 145     /**
 146      * @param ncid   nodeConnector identifier, e.g.: OF:21 or CTRL
 147      * @param aDNode
 148      * @return nodeConnector attached to given node
 149      * @throws ConstructionException
 150      */
 151     public static org.opendaylight.controller.sal.core.NodeConnector toADNodeConnector(
 152             final NodeConnectorId ncid, final org.opendaylight.controller.sal.core.Node aDNode) throws ConstructionException {
 153         NodeId nid = NodeMapping.toNodeId(aDNode);
 154         String nodeConnectorType = NodeMapping.toNodeConnectorType(ncid, nid);
 155         Object aDNodeConnectorId = NodeMapping.toADNodeConnectorId(ncid, nid);
 156         return new org.opendaylight.controller.sal.core.NodeConnector(nodeConnectorType, aDNodeConnectorId, aDNode);
 157     }
 158
 159     /**
 160      * @param aDNode
 161      * @return
 162      */
 163     private static NodeId toNodeId(org.opendaylight.controller.sal.core.Node aDNode) {
 164         return new NodeId(aDNode.getType() + ":" + String.valueOf(aDNode.getID()));
 165     }
 166
 167     public static String toNodeConnectorType(final NodeConnectorId ncId, final NodeId nodeId) {
 168         if (ncId.equals(toLocalNodeConnectorId(nodeId))) {
 169             return NodeConnectorIDType.SWSTACK;
 170         } else if (ncId.equals(toNormalNodeConnectorId(nodeId))) {
 171             return NodeConnectorIDType.HWPATH;
 172         } else if (ncId.equals(toControllerNodeConnectorId(nodeId))) {
 173             return NodeConnectorIDType.CONTROLLER;
 174         }
 175         return NodeConnectorIDType.OPENFLOW;
 176     }
 177
 178     public static Object toADNodeConnectorId(final NodeConnectorId nodeConnectorId, final NodeId nodeId) {
 179         if (nodeConnectorId.equals(toLocalNodeConnectorId(nodeId)) ||
 180                 nodeConnectorId.equals(toNormalNodeConnectorId(nodeId)) ||
 181                 nodeConnectorId.equals(toControllerNodeConnectorId(nodeId))) {
 182             return org.opendaylight.controller.sal.core.NodeConnector.SPECIALNODECONNECTORID;
 183         }
 184
 185         String nodeConnectorIdStripped = nodeConnectorId.getValue().replaceFirst("^.*:", "");
 186         if (nodeConnectorIdStripped.matches("[0-9]+")) {
 187             Short nodeConnectorIdVal = null;
 188             try {
 189                 nodeConnectorIdVal = Short.valueOf(nodeConnectorIdStripped);
 190             } catch (NumberFormatException e) {
 191                 LOG.warn("nodeConnectorId not supported (short): {}", nodeConnectorIdStripped, e);
 192             }
 193             return nodeConnectorIdVal;
 194         }
 195         return nodeConnectorIdStripped;
 196     }
 197
 198     public static NodeId toAdNodeId(final NodeConnectorId nodeConnectorId) {
 199         NodeId nodeId = null;
 200         if (nodeConnectorId != null) {
 201             nodeId = new NodeId(nodeConnectorId.getValue().replaceFirst(":[0-9]+$", ""));
 202         }
 203         return nodeId;
 204     }
 205
 206     public static NodeConnectorId toControllerNodeConnectorId(final NodeId node) {
 207         return new NodeConnectorId(node.getValue() + ":" + OutputPortValues.CONTROLLER.toString());
 208     }
 209
 210     public static NodeConnectorId toLocalNodeConnectorId(final NodeId node) {
 211         return new NodeConnectorId(node.getValue() + ":" + OutputPortValues.LOCAL.toString());
 212     }
 213
 214     public static NodeConnectorId toNormalNodeConnectorId(final NodeId node) {
 215         return new NodeConnectorId(node.getValue() + ":" + OutputPortValues.NORMAL.toString());
 216     }
 217
 218     public static NodeRef toNodeRef(final org.opendaylight.controller.sal.core.Node node) {
 219         Preconditions.checkArgument(NodeIDType.OPENFLOW.equals(node.getType()));
 220         final Long nodeId = Arguments.<Long>checkInstanceOf(node.getID(), Long.class);
 221         final NodeKey nodeKey = new NodeKey(new NodeId(OPENFLOW_ID_PREFIX + nodeId));
 222         final InstanceIdentifier<Node> nodePath = InstanceIdentifier.builder(Nodes.class).child(NODE_CLASS, nodeKey).toInstance();
 223         return new NodeRef(nodePath);
 224     }
 225
 226     public static NodeConnectorRef toNodeConnectorRef(final org.opendaylight.controller.sal.core.NodeConnector nodeConnector) {
 227
 228         final NodeRef node = NodeMapping.toNodeRef(nodeConnector.getNode());
 229         @SuppressWarnings("unchecked")
 230         final InstanceIdentifier<Node> nodePath = ((InstanceIdentifier<Node>) node.getValue());
 231         NodeConnectorId nodeConnectorId = null;
 232
 233         if (nodeConnector.getID().equals(org.opendaylight.controller.sal.core.NodeConnector.SPECIALNODECONNECTORID)) {
 234             final NodeId nodeId = toNodeId(nodePath);
 235             final String nodeConnectorType = nodeConnector.getType();
 236             if (nodeConnectorType.equals(NodeConnectorIDType.SWSTACK)) {
 237                 nodeConnectorId = toLocalNodeConnectorId(nodeId);
 238             } else if (nodeConnectorType.equals(NodeConnectorIDType.HWPATH)) {
 239                 nodeConnectorId = toNormalNodeConnectorId(nodeId);
 240             } else if (nodeConnectorType.equals(NodeConnectorIDType.CONTROLLER)) {
 241                 nodeConnectorId = toControllerNodeConnectorId(nodeId);
 242             }
 243         } else {
 244             nodeConnectorId = new NodeConnectorId(OPENFLOW_ID_PREFIX
 245                     + Arguments.<Short>checkInstanceOf(nodeConnector.getID(), Short.class));
 246         }
 247         final NodeConnectorKey connectorKey = new NodeConnectorKey(nodeConnectorId);
 248         final InstanceIdentifier<NodeConnector> path = nodePath.child(NODECONNECTOR_CLASS, connectorKey);
 249         return new NodeConnectorRef(path);
 250     }
 251
 252     public static org.opendaylight.controller.sal.core.Node toADNode(final NodeRef node) throws ConstructionException {
 253         return NodeMapping.toADNode(node.getValue());
 254     }
 255
 256     public static HashSet<Property> toADNodeConnectorProperties(final NodeConnectorUpdated nc) {
 257         final FlowCapableNodeConnectorUpdated fcncu = nc.<FlowCapableNodeConnectorUpdated>getAugmentation(FlowCapableNodeConnectorUpdated.class);
 258         if (!Objects.equal(fcncu, null)) {
 259             HashSet<Property> adNodeConnectorProperties = NodeMapping.toADNodeConnectorProperties(fcncu);
 260             return adNodeConnectorProperties;
 261         }
 262         return new HashSet<Property>();
 263     }
 264
 265     /**
 266      * @param nodeRef
 267      * @return node description in AD form, e.g.: OF|00:00:00:...:01
 268      */
 269     private static Description toADDescription(NodeRef nodeRef) {
 270         Description desc;
 271         try {
 272             desc = new Description(toADNode(nodeRef).toString());
 273         } catch (ConstructionException e) {
 274             desc = new Description("none");
 275             LOG.warn("node description extraction failed: {}", nodeRef);
 276         }
 277         return desc;
 278     }
 279
 280     public static HashSet<Property> toADNodeConnectorProperties(final NodeConnector nc) {
 281         final FlowCapableNodeConnector fcnc = nc.<FlowCapableNodeConnector>getAugmentation(FlowCapableNodeConnector.class);
 282         if (!Objects.equal(fcnc, null)) {
 283             return NodeMapping.toADNodeConnectorProperties(fcnc);
 284         }
 285         return new HashSet<Property>();
 286     }
 287
 288     public static HashSet<Property> toADNodeConnectorProperties(final FlowNodeConnector fcncu) {
 289
 290         final HashSet<org.opendaylight.controller.sal.core.Property> props = new HashSet<>();
 291         if (fcncu != null) {
 292             if (fcncu.getCurrentFeature() != null && toAdBandwidth(fcncu.getCurrentFeature()) != null) {
 293                 props.add(toAdBandwidth(fcncu.getCurrentFeature()));
 294             }
 295             if (fcncu.getAdvertisedFeatures() != null && toAdAdvertizedBandwidth(fcncu.getAdvertisedFeatures()) != null) {
 296                 props.add(toAdAdvertizedBandwidth(fcncu.getAdvertisedFeatures()));
 297             }
 298             if (fcncu.getSupported() != null && toAdSupportedBandwidth(fcncu.getSupported()) != null) {
 299                 props.add(toAdSupportedBandwidth(fcncu.getSupported()));
 300             }
 301             if (fcncu.getPeerFeatures() != null && toAdPeerBandwidth(fcncu.getPeerFeatures()) != null) {
 302                 props.add(toAdPeerBandwidth(fcncu.getPeerFeatures()));
 303             }
 304             if (fcncu.getName() != null && toAdName(fcncu.getName()) != null) {
 305                 props.add(toAdName(fcncu.getName()));
 306             }
 307             if (fcncu.getConfiguration() != null && toAdConfig(fcncu.getConfiguration()) != null) {
 308                 props.add(toAdConfig(fcncu.getConfiguration()));
 309             }
 310             if (fcncu.getState() != null && toAdState(fcncu.getState()) != null) {
 311                 props.add(toAdState(fcncu.getState()));
 312             }
 313         }
 314         return props;
 315     }
 316
 317     public static Name toAdName(final String name) {
 318         return new Name(name);
 319     }
 320
 321     public static Config toAdConfig(final PortConfig pc) {
 322         Config config = null;
 323         if (pc.isPORTDOWN()) {
 324             config = new Config(Config.ADMIN_DOWN);
 325         } else {
 326             config = new Config(Config.ADMIN_UP);
 327         }
 328         return config;
 329     }
 330
 331     public static org.opendaylight.controller.sal.core.State toAdState(final State s) {
 332
 333         org.opendaylight.controller.sal.core.State state = null;
 334         if (s.isLinkDown()) {
 335             state = new org.opendaylight.controller.sal.core.State(org.opendaylight.controller.sal.core.State.EDGE_DOWN);
 336         } else {
 337             state = new org.opendaylight.controller.sal.core.State(org.opendaylight.controller.sal.core.State.EDGE_UP);
 338         }
 339         return state;
 340     }
 341
 342     public static Bandwidth toAdBandwidth(final PortFeatures pf) {
 343         Bandwidth bw = null;
 344         if (pf.isTenMbHd() || pf.isTenMbFd()) {
 345             bw = new Bandwidth(Bandwidth.BW10Mbps);
 346         } else if (pf.isHundredMbHd() || pf.isHundredMbFd()) {
 347             bw = new Bandwidth(Bandwidth.BW100Mbps);
 348         } else if (pf.isOneGbHd() || pf.isOneGbFd()) {
 349             bw = new Bandwidth(Bandwidth.BW1Gbps);
 350         } else if (pf.isOneGbFd()) {
 351             bw = new Bandwidth(Bandwidth.BW10Gbps);
 352         } else if (pf.isTenGbFd()) {
 353             bw = new Bandwidth(Bandwidth.BW10Gbps);
 354         } else if (pf.isFortyGbFd()) {
 355             bw = new Bandwidth(Bandwidth.BW40Gbps);
 356         } else if (pf.isHundredGbFd()) {
 357             bw = new Bandwidth(Bandwidth.BW100Gbps);
 358         } else if (pf.isOneTbFd()) {
 359             bw = new Bandwidth(Bandwidth.BW1Tbps);
 360         }
 361         return bw;
 362     }
 363
 364     public static AdvertisedBandwidth toAdAdvertizedBandwidth(final PortFeatures pf) {
 365         AdvertisedBandwidth abw = null;
 366         final Bandwidth bw = toAdBandwidth(pf);
 367         if (bw != null) {
 368             abw = new AdvertisedBandwidth(bw.getValue());
 369         }
 370         return abw;
 371     }
 372
 373     public static SupportedBandwidth toAdSupportedBandwidth(final PortFeatures pf) {
 374         SupportedBandwidth sbw = null;
 375         final Bandwidth bw = toAdBandwidth(pf);
 376         if (bw != null) {
 377             sbw = new SupportedBandwidth(bw.getValue());
 378         }
 379         return sbw;
 380     }
 381
 382     public static PeerBandwidth toAdPeerBandwidth(final PortFeatures pf) {
 383         PeerBandwidth pbw = null;
 384         final Bandwidth bw = toAdBandwidth(pf);
 385         if (bw != null) {
 386             pbw = new PeerBandwidth(bw.getValue());
 387         }
 388         return pbw;
 389     }
 390
 391     public static HashSet<Property> toADNodeProperties(final NodeUpdated nu) {
 392         final FlowCapableNodeUpdated fcnu = nu.getAugmentation(FlowCapableNodeUpdated.class);
 393         if (fcnu != null) {
 394             HashSet<Property> adNodeProperties = toADNodeProperties(fcnu, nu.getId());
 395             adNodeProperties.add(toADDescription(nu.getNodeRef()));
 396             return adNodeProperties;
 397         }
 398         return new HashSet<org.opendaylight.controller.sal.core.Property>();
 399     }
 400
 401     public static HashSet<Property> toADNodeProperties(final FlowNode fcnu, final NodeId id) {
 402
 403         final HashSet<org.opendaylight.controller.sal.core.Property> props = new HashSet<>();
 404
 405         if (fcnu != null) {
 406             props.add(toADTimestamp());
 407
 408             // props.add(fcnu.supportedActions.toADActions) - TODO
 409             if (id != null) {
 410                 props.add(toADMacAddress(id));
 411             }
 412             SwitchFeatures switchFeatures = fcnu.getSwitchFeatures();
 413             if (switchFeatures != null) {
 414                 if (switchFeatures.getMaxTables() != null) {
 415                     props.add(toADTables(switchFeatures.getMaxTables()));
 416                 }
 417                 if (switchFeatures.getCapabilities() != null) {
 418                     props.add(toADCapabiliities(switchFeatures.getCapabilities()));
 419                 }
 420                 if (switchFeatures.getMaxBuffers() != null) {
 421                     props.add(toADBuffers(switchFeatures.getMaxBuffers()));
 422                 }
 423             }
 424         }
 425         return props;
 426     }
 427
 428     public static TimeStamp toADTimestamp() {
 429         final Date date = new Date();
 430         final TimeStamp timestamp = new TimeStamp(date.getTime(), "connectedSince");
 431         return timestamp;
 432     }
 433
 434     public static MacAddress toADMacAddress(final NodeId id) {
 435         final String nodeId = id.getValue().replaceAll(OPENFLOW_ID_PREFIX, "");
 436         BigInteger nodeIdRaw = new BigInteger(nodeId);
 437         long lNodeId = nodeIdRaw.longValue();
 438         byte[] bytesFromDpid = ToSalConversionsUtils.bytesFromDpid(lNodeId);
 439         return new MacAddress(bytesFromDpid);
 440     }
 441
 442     public static Tables toADTables(final Short tables) {
 443         return new Tables(tables.byteValue());
 444     }
 445
 446     public static Capabilities toADCapabiliities(final List<Class<? extends FeatureCapability>> capabilities) {
 447
 448         int b = 0;
 449         for (Class<? extends FeatureCapability> capability : capabilities) {
 450             if (capability.equals(FlowFeatureCapabilityFlowStats.class)) {
 451                 b = Capabilities.CapabilitiesType.FLOW_STATS_CAPABILITY.getValue() | b;
 452             } else if (capability.equals(FlowFeatureCapabilityTableStats.class)) {
 453                 b = Capabilities.CapabilitiesType.TABLE_STATS_CAPABILITY.getValue() | b;
 454             } else if (capability.equals(FlowFeatureCapabilityPortStats.class)) {
 455                 b = Capabilities.CapabilitiesType.PORT_STATS_CAPABILITY.getValue() | b;
 456             } else if (capability.equals(FlowFeatureCapabilityStp.class)) {
 457                 b = Capabilities.CapabilitiesType.STP_CAPABILITY.getValue() | b;
 458             } else if (capability.equals(FlowFeatureCapabilityIpReasm.class)) {
 459                 b = Capabilities.CapabilitiesType.IP_REASSEM_CAPABILITY.getValue() | b;
 460             } else if (capability.equals(FlowFeatureCapabilityQueueStats.class)) {
 461                 b = Capabilities.CapabilitiesType.QUEUE_STATS_CAPABILITY.getValue() | b;
 462             } else if (capability.equals(FlowFeatureCapabilityArpMatchIp.class)) {
 463                 b = Capabilities.CapabilitiesType.ARP_MATCH_IP_CAPABILITY.getValue() | b;
 464             }
 465         }
 466         return new Capabilities(b);
 467     }
 468
 469     public static Buffers toADBuffers(final Long buffers) {
 470         return new Buffers(buffers.intValue());
 471     }
 472
 473
 474     private static final boolean isInteger(String value) {
 475         if (value.isEmpty()) return false;
 476         for (int i = 0; i < value.length(); i++) {
 477             if (i == 0 && value.charAt(i) == '-') {
 478                 if (value.length() == 1) return false;
 479                 else continue;
 480             }
 481             if (Character.digit(value.charAt(i), 10) < 0) return false;
 482         }
 483         return true;
 484     }
 485 }