Java的UniObjects读取目标代码文件

Question

I am reading from a UniVerse database using UniObjects for Java using the UniFile.read() method. This is an example of the type of code I use for this.

...
UniFile uFile = uSession.open ("ORDERS");
UniDataSet datasetRequest = getUnidatasetRequest();
UniDataSet datasetResult = uFile.read(datasetRequest);  
...

For most queries this works, but when I try to read an object file (eg SOMEFILE.O ), this read truncates the records within the file. I am thinking that the special characters in the object code are causing problems.

Is there a way to read object code records using UniObjects for Java?

Answer 1

This is what we ended up doing:

I couldn't find a way to make the dataset read the binary code, so I read the items one at a time using a subroutine. Before the items could be read I had to install and run a UniBasic subroutine on the database to encode the item into base 64 using something like this:

...

LOOP
    READBLK A.BYTE FROM FILE, 1 THEN NULL ELSE DONE = TRUE
UNTIL DONE DO
    TO.ENCODE = TO.ENCODE : A.BYTE
REPEAT
ENCODE('Base64', 1, TO.ENCODE, 1, RET.VALUE, 1)

...

This subroutine returned the base 64 encoded item as a String to UOJ and then it could be decoded and no data was lost. Here is an example of the Java Code:

...
UniSubroutine readBlkSub = unisession.subroutine(routineName, 4);
readBlkSub.setArg(0, getNameID());
readBlkSub.setArg(1, itemName);
readBlkSub.call();
final String SUCCESS = "0";
if (readBlkSub.getArg(3).equals(SUCCESS)) {
    encodedObjectCode = readBlkSub.getArg(2);
    sun.misc.BASE64Decoder decoder = new BASE64Decoder();
    byte[] decodedBytes = decoder.decodeBuffer(encodedObjectCode);
    ...
}