openflowplugin/src/main/java/org/opendaylight/openflowplugin/openflow/md/core/sal/SwitchFeaturesUtil.java

   1 /**
   2  * Copyright (c) 2013 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.openflowplugin.openflow.md.core.sal;
   9
  10 import static org.opendaylight.openflowplugin.api.OFConstants.OFP_VERSION_1_0;
  11 import static org.opendaylight.openflowplugin.api.OFConstants.OFP_VERSION_1_3;
  12
  13 import java.util.HashMap;
  14 import java.util.Map;
  15
  16 import org.opendaylight.openflowplugin.api.openflow.md.core.sal.BuildSwitchFeatures;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.flow.node.SwitchFeatures;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21
  22 /**
  23  * @author jsebin
  24  *
  25  */
  26 public final class SwitchFeaturesUtil {
  27
  28     private static final Logger LOG = LoggerFactory.getLogger(SwitchFeaturesUtil.class);
  29
  30     private static SwitchFeaturesUtil instance = new SwitchFeaturesUtil();
  31     private Map<Short, BuildSwitchFeatures> swFeaturesBuilders;
  32
  33     private SwitchFeaturesUtil() {
  34         swFeaturesBuilders = new HashMap<>();
  35         swFeaturesBuilders.put(OFP_VERSION_1_0, BuildSwitchCapabilitiesOF10.getInstance());
  36         swFeaturesBuilders.put(OFP_VERSION_1_3, BuildSwitchCapabilitiesOF13.getInstance());
  37     }
  38
  39     /**
  40      * Get singleton instance
  41      *
  42      * @return instance
  43      */
  44     public static SwitchFeaturesUtil getInstance() {
  45         return instance;
  46     }
  47
  48     /**
  49      * @param features {@link org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput}
  50      * @return switch features
  51      */
  52     public SwitchFeatures buildSwitchFeatures(GetFeaturesOutput features) {
  53
  54         if(swFeaturesBuilders.containsKey(features.getVersion())) {
  55             LOG.debug("map contains version {}", features.getVersion());
  56             try {
  57                 return swFeaturesBuilders.get(features.getVersion()).build(features);
  58             } catch (NullPointerException e) {
  59                 LOG.error("error while building switch features {}", e);
  60             }
  61         }
  62         else {
  63             LOG.warn("unknown version: {}", features.getVersion());
  64         }
  65
  66         return null;
  67     }
  68
  69 }