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Bug on browsing addressSpace
September 16, 2013
12:18, EEST
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infraview.schmidt
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Forum Posts: 7
Member Since:
August 13, 2013
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Hello,

i received a NullPointerException on the .browse methode in the class AddressSpace.

It occurs when the NodeId is null:

My code:

/**
* Returns a List of ReferenceDescriptions. List only contains references
* of one specified type
* @param addressSpace of the opc-server
* @param nodeId which is parent for the list of referenceDescriptions
* @param reference reference type of the list
* @return a list of ReferenceDescriptions
* @throws ServiceException if browsing fails
* @throws StatusException if browsing fails
*/
public static List getReferenceDescriptions(
final AddressSpace addressSpace, final NodeId nodeId,
final NodeId reference) throws ServiceException, StatusException {

return addressSpace.browse(nodeId, BrowseDirection.Forward, reference,
true, NodeClass.Object, NodeClass.Variable,
NodeClass.ObjectType);
}

The Stacktrace:

java.lang.NullPointerException: nodeId
at com.prosysopc.ua.client.AddressSpace.browse(Unknown Source)
at com.prosysopc.ua.client.AddressSpace.browse(Unknown Source)
at de.spektra.infraview.conformance.OpcUaUtil.getReferenceDescriptions(OpcUaUtil.java:224)

September 16, 2013
19:06, EEST
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Jouni Aro
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Forum Posts: 846
Member Since:
December 21, 2011
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Well, that’s kind of expected. It does not make sense to call browse() with nodeId=null.

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