

8:31, EEST

April 27, 2015

Hello support team,
i am evaluating the Java OPC UA SDK. For our case we need to extract data (value attribute) from different variableNodes . Only solution i can think of is following:
DataValue data=client.readValue
if(data.getValue() instanceof Range){
Range range_=(Range)data.getValue();
Double high=range_.getHigh();
Double low=range_.getLow();
/*action with high + low*/
}
if(data.getValue() instanceof EUInformation){
EUInformation euinfo_=(EUInformation)data.getValue();
Integer Unitid=euinfo.getUnitid();
/*get other data from euinfo*/
/*action with extracted data from euinfo*/
}
if(…){
….
}
….
Is there some better way to get data from variant? I am also aware of safe cast via variant.asClass(). But it would also lead to much if-statements.
Could you kindly provide examples if there way around if()s.
Thanks in advance.
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