Re: Jawin-Calling a DLL Entry Point

Hello Morten,

Thank you very much for your reply. My Jawin program looks like this:

    int size = 512;
    Byte[] errorbuffer = new Byte[(size+1)*2];
    String datasetxml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?> \n" +
                      "<!--3/15/2002 2:08:59 PM-->\n" +
                         "<FormsMergeData> \n" +
                         "<FormSet name=\"PRINTPREVIEW\" dir=
                      "C:\\temp\\\"></FormSet> \n" +
                         "  <PageData> \n" +
                         "  </PageData> \n" +
                         "</FormsMergeData>";

   String pdfname = "C:\\temp\\PrintPreview.pdf";
   FuncPtr mypreview = null;
   try {
     mypreview = new FuncPtr("merge.dll", "mergefromxmlW");

     NakedByteStream nbs = new NakedByteStream();
     LittleEndianOutputStream leos = new LittleEndianOutputStream(nbs);

     leos.writeInt(size);
     leos.writeStringUnicode(datasetxml);
     leos.writeStringUnicode(pdfname);

     byte[] response = mypreview.invoke("AIGG::n4", 16, nbs, null,
ReturnFlags.CHECK_NONE);
 ...}

Our UI team calls mergefromxmlW function in merge.dll that created by the
Server team.The UI pass an error buffer, error buffer size, datasetxml
string and pdf output filename string as [in] parameter. The Server needs
to load the dataset XML and the other XML such as codepages.xml and
perform the merge. If the merge is success, a pdf file should be generated.

Assume the instruction string "AIGG::n4" I wrote is correct, now I got the
following exception:

Exception in thread main:java.lang.NoSuchMethodError:
org.jawin.COMError:method <init>()V not found.

I tried to unzip Jawin.jar and look at the method inside
\org\jawin\COMError.class and found three init method:
[0]<init>, [1]<init> and [2]<init>

Why is Java not able to find method <init>()V? The datasetxml and pdfname
strings don't match with these 3 init methods inside COMError.class? The
Server actually requires the datasetxml and pdfname strings are UTF8, I
didn't do any conversion, because I thought Java is supporting Unicode.

Any suggestions are very much appreciate it.

Thanks/Hua