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