File in filesystem locked for deletion

Question

Hi,
I have a problem with the deletion of a file from the filesystem.
I have created a file with:
File file = new File("download.csv");
then fill the file through a RFC call to the backend and a third party CSV Writer.
Finally I want to transform the file for a download an delete it.
I transform the file with:
try {
     IWDResource resource = WDResourceFactory.createResource(
               new FileInputStream(file),
               CustomerRFCView.FILE_NAME,
               CustomerRFCView.FILE_EXT,
               true);
wdContext.currentContextElement().setFileDownloadResource(resource);
} catch (FileNotFoundException e) {
    wdComponentAPI.getMessageManager().reportMessage(
                                                 IMessageCcCustomerRFC.FNF,
               new Object[] {
                    wdContext
                    .currentContextElement()
                    .getFileDownloadResource()
                    .getResourceName()},
               true);
and finally I want to delete the file from the filesystem with:
file.delete();
But the file is not deleted. If I try to delete it manually Windows is saying that the file is in use and can not be deleted.
If I comment the download transform part, then the file is deleted from the server.
Can anybody help me???

Answer 1

ByteArrayOutputStream bout = new ByteArrayOutputStream();
          try {
               InputStream in = new FileInputStream(file);
               byte buffer[] = new byte[4096];
               int read = 0;
               do {
                    read = in.read(buffer);
                    if (read != -1) {
                         bout.write(buffer, 0, read);
               } while (read != -1);
               //copy binary to an input stream for reading and parsing
               //save this for multiple uses
               in.close();
          } catch (Exception e) {
               // TODO: handle exception
          //read file and store binary in bout
          InputStream input = new ByteArrayInputStream(bout.toByteArray());
          IWDResource resource = WDResourceFactory.createResource(
                                        input,
                                        CustomerRFCView.FILE_NAME,
                                        CustomerRFCView.FILE_EXT,
                                        true);
          wdContext.currentContextElement().setFileDownloadResource(resource);