Hallo Marco,
Using the IFrame-UI-Element to display your static PDF document is a possible but not a recommended solution.
The IFrame-UI-Element will be deprecated in the next major NetWeaver release:
+This UI element may be withdrawn; with the first new major NetWeaver release it is no longer needed.
This UI element is too broken to be really useful and cannot be fixed.
For integration of non-Web Dynpro applications, please use the Enterprise Portal instead. For embedding (help) texts and the like special UI elements will be provided.+
Proposed Solution
You should better use the
InteractiveForm-UI-Element
, which is also
applicable for displaying static (non-interactive) PDF resources.
To use the InteractiveForm-UI-element as a PDF-viewer you must define the following properties:
dataSource: <not bound>, templateSource: <not bound, not set i.e. empty>, <b>mode: usePDF</b>
Bind the property
pdfSource
to a context attribute of type binary, e.g. with attribute name
PDFResource.
Controller Code
You must copy the deployed PDF resource (part of your project) to the context attribute PDFResource. This requires some custom code:
//@@begin javadoc:wdDoInit()
/** Hook method called to initialize controller. */
//@@end
public void wdDoInit()
{
//@@begin wdDoInit()
IWDAttributeInfo attributeInfo =
wdContext.getNodeInfo().getAttribute(IPrivatePDFDisplayView.IContextElement.PDF_RESOURCE);
// make the context attribute's simple type modifiable.
// Only with this line of code the binary data (stored within the
// context attribute) can be parsed. The Web Dynpro Runtime stores
// the mime-object’s metadata within the attribute’s
// create a modifiable binary type for the context attribute which stores the MIME-object.
IWDModifiableBinaryType binaryType = (IWDModifiableBinaryType) attributeInfo.getModifiableSimpleType();
// set binary type metadata. Without setting the mime type the client
// does not know how to open the downloaded file.
binaryType.setFileName(this.PDF_FILE_NAME);
binaryType.setMimeType(WDWebResourceType.PDF);
try {
// The pdf file '<name>.jpg' is deployed with the Web Dynpro project
// (under src/mimes/Components...). The resource path (URL) for this mime
// objects can be accessed using the WDURLGenerator service.
String resourcePath =
WDURLGenerator.getResourcePath(wdComponentAPI.getDeployableObjectPart(), this.PDF_FILE_NAME);
// retrieve byte array for given resource path and store it
// in context value attribute 'FileDownload'
wdContext.currentContextElement().setPDFResource(this.getByteArrayFromResourcePath(resourcePath));
} catch (WDAliasResolvingException e) {
wdComponentAPI.getMessageManager().reportException(e.getLocalizedMessage(), true);
} catch (Exception e) {
throw new WDRuntimeException(e);
}
//@@end
}
/*
* The following code section can be used for any Java code that is
* not to be visible to other controllers/views or that contains constructs
* currently not supported directly by Web Dynpro (such as inner classes or
* member variables etc.). </p>
*
* Note: The content of this section is in no way managed/controlled
* by the Web Dynpro Designtime or the Web Dynpro Runtime.
*/
//@@begin others
/**
* Returns a byte array for a given file resource path
*/
private byte[] getByteArrayFromResourcePath(String resourcePath)
throws FileNotFoundException, IOException {
FileInputStream in = new FileInputStream(new File(resourcePath));
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();
return out.toByteArray();
}
// store image file name in constant FILE_NAME
private static final String PDF_FILE_NAME = "WD4J_WhatsNew_NW04s.pdf";
//@@end
Your PDF document will then be displayed in the InteractiveForm-UI-Element.
Best regards, Bertram
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