Use of Out-Parameters

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Use of Out-Parameters

The code listing below iterates through open documents and validates each of them. For each validation, a message is generated using the output parameters of the Validation method.

 

 

01 // Iterate through all open documents and set the View mode to 'Text'.

02 for (Document doc:authenticDesktop.getDocuments())

03   if ( doc.getCurrentViewMode() != SPYViewModes.spyViewText)

04        doc.switchViewMode(SPYViewModes.spyViewText);

05

06 // An alternative iteration mode is index-based. COM indices are typically zero-based.

07 Documents documents = authenticDesktop.getDocuments();

08 for (int i = 1; i <= documents.getCount(); i++)

09 {

10   Document doc = documents.getItem(i);

11        

12 // Validation is one of the few methods that have output parameters.

13 // The class JVariant is the correct type for parameters in these cases.

14 // To get values back, mark them with the by-reference flag.

15 JVariant validationErrorText = new JVariant.JStringVariant("");     validationErrorText.setByRefFlag();

16 JVariant validationErrorCount = new JVariant.JIntVariant(0);      validationErrorCount.setByRefFlag();

17 JVariant validationErrorXMLData = new JVariant.JIDispatchVariant(0);  validationErrorXMLData.setByRefFlag();

18   if (!doc.isValid(validationErrorText, validationErrorCount, validationErrorXMLData))

19     System.out.println("Document " + doc.getName() + " is not wellformed - " + validationErrorText.getStringValue());

20   else

21     System.out.println("Document " + doc.getName() + " is wellformed.");

22 }

 


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