IllegalArgumentException when using FileDownload in a table

[Former Member]

Hello,

I try to build a WebDynpro -Application, that allows to download files from a KM.

When I use the UI-Element FileDownload alone, everything works fine.

When I add the FileDownload-Element as column to a table, I get an [IllegalArgumentException|http://ubuntuusers.de/paste/182148/]

This is the code I use:

 
IWDAttributeInfo attributeInfo2 =wdContext.getNodeInfo() 
   .getAttribute(IPrivateResultView.IDownloadNodeElement.DOWNLOAD_FILE); 
IWDModifiableBinaryType binaryType2 =(IWDModifiableBinaryType) attributeInfo2 
   .getModifiableSimpleType(); 

... 

ByteArrayOutputStream out = new ByteArrayOutputStream(); 
int length; 
byte[] part = new byte[10 * 1024]; 
while ((length = in.read(part)) != -1) { 
   out.write(part, 0, length); 
} 
in.close(); 
byte[] myDLfile = out.toByteArray(); 
IPrivateResultView.IDownloadNodeElement DLNode =wdContext.nodeDownloadNode() 
   .createDownloadNodeElement(); 

DLNode.setDownloadFile(myDLfile); 
DLNode.setFileName(resource.getDisplayName(true)); 
wdContext.nodeDownloadNode().addElement(DLNode); 

binaryType2.setFileName(resource.getDisplayName(true)); 
binaryType2.setMimeType(WDWebResourceType.UNKNOWN); 

DownloadFile is of type binary.

[Former Member · Accepted solution]

Hello nikhiL,

thank you for the quick answer. I tried, what you told me, but the error (java.lang.IllegalArgumentException) is still the same...

Best regards,

Markus

[nikhil_bose · Accepted solution]

It will be around the first few code snippets only. check you have put the same context element as attribute.

make sure that you are putting correct values to modifiable value type

regards,

nikhiL

[Former Member]

Hello nikhiL,

you were right, my mistake was not to use the nodeDownloadNode().

With this code, it worked:

IWDAttributeInfo attributeInfo2 =wdContext.nodeDownloadNode().getNodeInfo().
   getAttribute(IPrivateResultView.IDownloadNodeElement.DOWNLOAD_FILE);

Thanks alot!

Best regards,

Markus

[nikhil_bose]

replace

IWDAttributeInfo attributeInfo2 =wdContext.getNodeInfo() 
   .getAttribute(IPrivateResultView.IDownloadNodeElement.DOWNLOAD_FILE);

by

IWDAttributeInfo attributeInfo2 =wdContext.getNodeInfo() 
   .getAttribute("Download_file"); // case-sensitive  

nikhiL