Display PDF in different window by reading Binary file in MIME folder.

Question

Hi all,
I've kept binary file in MIME folder and I'm trying to read the contents of it. and I'm trying to display contents in pdf format in separate window.
For this I was able to read the file by using FileInputStream
byte[] bytes = new byte[1000];
     try
              //File file = new File(WDURLGenerator.getResourcePath(wdComponentAPI.getDeployableObjectPart(),"data.bin"));
               File file = new File(WDURLGenerator.getResourcePath("test.bin"));
               FileInputStream is = new FileInputStream(file);
              long length = file.length();
               //Create the byte array to hold the data
               byte[] bytesA = new byte[(int)length];
               //Read in the bytes
                int offset = 0;
                int numRead = 0;
                while (offset < bytesA.length&& (numRead=is.read(bytesA, offset, bytesA.length-offset)) >= 0)
                     offset += numRead;
                    is.close();
               bytes = bytesA;
               wdContext.currentContextElement().setPdfSource(bytes);
             catch(Exception e)
               wdComponentAPI.getMessageManager().reportException("Error Reading File:"+e.getCause(),true);
               wdComponentAPI.getMessageManager().reportException("Error Reading File To String:"+e.toString(),true);
I've to show this in external window. I created attribute "pdfResource" of type binary
and declared in the source
private ISimpleType myPdfDoc;
After that I added this bit of code in Init Method
myPdfDoc = wdContext.getNodeInfo().getAttribute("pdfResource").getModifiableSimpleType();
((IWDModifiableBinaryType)myPdfDoc).setMimeType(WDWebResourceType.PDF);
((IWDModifiableBinaryType)myPdfDoc).setFileName("PDF");
After this I made an action handler which has following code.
final byte[] documentContent = bytes
final String docUrl = myPdfDoc.format( bytes );
String docUrl = myPdfDoc.format(bytes);
IWDWindow window = wdComponentAPI.getWindowManager().createExternalWindow(docURL,"Resource", true);
window.open();
But it is throwing Null Pointer exception for Init Method and also while displaying.
Where is that I'm faltering. Any Pointers will be help ful
Thanks
Srikant

Answer 1

First of all why do you need those three lines of code in your wdDoInit() ?
Simply, you may use this:
IWDCachedWebResource cachedResource = null;
String url = null;
byte[] pdf = wdContext.currentContextElement().getPdfSource();
if (pdf != null) {
   cachedResource = WDWebResource.getWebResource(pdf, WDWebResourceType.PDF);
   url = cachedResource.getURL();
Refer <a href="http://help.sap.com/saphelp_nw04s/helpdata/en/4a/fb8342a7d30d53e10000000a155106/content.htm">Utilizing the IWDCachedWebResource-API</a> for further assistance.
/* Changed the code */
Message was edited by: Bala Krishnan