/**
* Transforms the report into a StreamResource for downloading
*
* @param format
* @return
*/
protected StreamResource createResourceForExport(final Format format) {
return new StreamResource(
new StreamSource() {
private static final long serialVersionUID = -5207351556320212325L;
@Override
public InputStream getStream() {
if (jasperReport != null) {
ByteArrayOutputStream os = new ByteArrayOutputStream();
reportGenerator.setShowMargins(showMargins.getValue());
reportGenerator.executeReport(
jasperReport,
currentParameters,
jrDataSource,
format,
((WrappedHttpSession) VaadinSession.getCurrent().getSession()).getHttpSession(),
VaadinSession.getCurrent().getLocale(),
os);
return new ByteArrayInputStream(os.toByteArray());
} else {
return null;
}
}
},
"report." + format.name());
}
