Merge "Avoid IllegalArgument on missing source"

[controller.git] / opendaylight / netconf / netconf-util / src / main / java / org / opendaylight / controller / netconf / util / messages / NetconfMessageUtil.java

diff --git a/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/messages/NetconfMessageUtil.java b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/messages/NetconfMessageUtil.java
index c532b7f9a6f235a0eebc7dc4a53bc10f2208dbc4..3c6b6ccab9efa0a0a28b5630da5d5c9f30157610 100644 (file)
--- a/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/messages/NetconfMessageUtil.java
+++ b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/messages/NetconfMessageUtil.java
@@ -9,6 +9,7 @@
 package org.opendaylight.controller.netconf.util.messages;
 
 import com.google.common.base.Function;
+import com.google.common.base.Optional;
 import com.google.common.collect.Collections2;
 import java.util.Collection;
 import java.util.List;
@@ -23,7 +24,7 @@ import org.w3c.dom.Document;
 
 public final class NetconfMessageUtil {
 
-    private static final Logger logger = LoggerFactory.getLogger(NetconfMessageUtil.class);
+    private static final Logger LOG = LoggerFactory.getLogger(NetconfMessageUtil.class);
 
     private NetconfMessageUtil() {}
 
@@ -59,9 +60,13 @@ public final class NetconfMessageUtil {
 
     public static Collection<String> extractCapabilitiesFromHello(Document doc) throws NetconfDocumentedException {
         XmlElement responseElement = XmlElement.fromDomDocument(doc);
-        XmlElement capabilitiesElement = responseElement
-                .getOnlyChildElementWithSameNamespace(XmlNetconfConstants.CAPABILITIES);
-        List<XmlElement> caps = capabilitiesElement.getChildElements(XmlNetconfConstants.CAPABILITY);
+        // Extract child element <capabilities> from <hello> with or without(fallback) the same namespace
+        Optional<XmlElement> capabilitiesElement = responseElement
+                .getOnlyChildElementWithSameNamespaceOptionally(XmlNetconfConstants.CAPABILITIES)
+                .or(responseElement
+                        .getOnlyChildElementOptionally(XmlNetconfConstants.CAPABILITIES));
+
+        List<XmlElement> caps = capabilitiesElement.get().getChildElements(XmlNetconfConstants.CAPABILITY);
         return Collections2.transform(caps, new Function<XmlElement, String>() {
 
             @Override
@@ -70,7 +75,7 @@ public final class NetconfMessageUtil {
                 try {
                     return input.getTextContent().trim();
                 } catch (NetconfDocumentedException e) {
-                    logger.trace("Error fetching inpit text content becauese {}",e);
+                    LOG.trace("Error fetching input text content",e);
                     return null;
                 }
             }