opendaylight/netconf/netconf-monitoring/src/main/java/org/opendaylight/controller/netconf/monitoring/GetSchema.java

   1 /*
   2  * Copyright (c) 2015 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
   9 package org.opendaylight.controller.netconf.monitoring;
  10
  11 import com.google.common.base.Optional;
  12 import com.google.common.collect.Maps;
  13 import java.util.Map;
  14 import org.opendaylight.controller.config.util.xml.DocumentedException;
  15 import org.opendaylight.controller.config.util.xml.XmlElement;
  16 import org.opendaylight.controller.config.util.xml.XmlUtil;
  17 import org.opendaylight.controller.netconf.api.monitoring.NetconfMonitoringService;
  18 import org.opendaylight.controller.netconf.api.xml.XmlNetconfConstants;
  19 import org.opendaylight.controller.netconf.util.mapping.AbstractSingletonNetconfOperation;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22 import org.w3c.dom.Document;
  23 import org.w3c.dom.Element;
  24
  25 public class GetSchema extends AbstractSingletonNetconfOperation {
  26     public static final String GET_SCHEMA = "get-schema";
  27     public static final String IDENTIFIER = "identifier";
  28     public static final String VERSION = "version";
  29
  30     private static final Logger LOG = LoggerFactory.getLogger(GetSchema.class);
  31     private final NetconfMonitoringService cap;
  32
  33     public GetSchema(final NetconfMonitoringService cap) {
  34         super(MonitoringConstants.MODULE_NAME);
  35         this.cap = cap;
  36     }
  37
  38     @Override
  39     protected String getOperationName() {
  40         return GET_SCHEMA;
  41     }
  42
  43     @Override
  44     protected String getOperationNamespace() {
  45         return XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_YANG_IETF_NETCONF_MONITORING;
  46     }
  47
  48     @Override
  49     protected Element handleWithNoSubsequentOperations(final Document document, final XmlElement xml) throws DocumentedException {
  50         final GetSchemaEntry entry;
  51
  52         entry = new GetSchemaEntry(xml);
  53
  54         final String schema;
  55         try {
  56             schema = cap.getSchemaForCapability(entry.identifier, entry.version);
  57         } catch (final IllegalStateException e) {
  58             final Map<String, String> errorInfo = Maps.newHashMap();
  59             errorInfo.put(entry.identifier, e.getMessage());
  60             LOG.warn("Rpc error: {}", DocumentedException.ErrorTag.operation_failed, e);
  61             throw new DocumentedException(e.getMessage(), DocumentedException.ErrorType.application,
  62                     DocumentedException.ErrorTag.operation_failed,
  63                     DocumentedException.ErrorSeverity.error, errorInfo);
  64         }
  65
  66         final Element getSchemaResult;
  67         getSchemaResult = XmlUtil.createTextElement(document, XmlNetconfConstants.DATA_KEY, schema,
  68                 Optional.of(XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_YANG_IETF_NETCONF_MONITORING));
  69         LOG.trace("{} operation successful", GET_SCHEMA);
  70
  71         return getSchemaResult;
  72     }
  73
  74     private static final class GetSchemaEntry {
  75         private final String identifier;
  76         private final Optional<String> version;
  77
  78         GetSchemaEntry(final XmlElement getSchemaElement) throws DocumentedException {
  79             getSchemaElement.checkName(GET_SCHEMA);
  80             getSchemaElement.checkNamespace(XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_YANG_IETF_NETCONF_MONITORING);
  81
  82             XmlElement identifierElement = null;
  83             try {
  84                 identifierElement = getSchemaElement.getOnlyChildElementWithSameNamespace(IDENTIFIER);
  85             } catch (final DocumentedException e) {
  86                 LOG.trace("Can't get identifier element as only child element with same namespace due to ",e);
  87                 throw DocumentedException.wrap(e);
  88             }
  89             identifier = identifierElement.getTextContent();
  90             final Optional<XmlElement> versionElement = getSchemaElement
  91                     .getOnlyChildElementWithSameNamespaceOptionally(VERSION);
  92             if (versionElement.isPresent()) {
  93                 version = Optional.of(versionElement.get().getTextContent());
  94             } else {
  95                 version = Optional.absent();
  96             }
  97         }
  98     }
  99 }