Lately I have been using PeopleCode to manipulate binary files: moving files, copying files, and even creating zip files. A prerequisite for reading from and writing to binary files is the basic binary array -- the buffer. My blog post Base64 Encoding for PeopleSoft demonstrated a very complicated method for creating binary files that worked with PeopleTools 8.49 and earlier, but does not work on my PeopleTools 8.51 systems. While studying PeopleBooks I found a much easier, well documented method for creating binary arrays:
Local JavaObject &bytes = CreateJavaArray("byte", 1024 /* length of array */);
For arrays with known values at construction time, you can use the CreateJavaObject function:
Local JavaObject &bytes = CreateJavaObject("byte", 5, 10, 15, 20);
Note: Since this is documented, I suspect these functions will work with PeopleTools 8.49 and earlier, but I haven't tested them on earlier PeopleTools versions. If this method won't work in PeopleTools 8.49 or earlier, then you are welcome to use the alternative:
REM ** get a reference to a Java class instance for the primitive byte array; Local JavaObject &arrayClass = GetJavaClass("java.lang.reflect.Array"); Local JavaObject &bytes = &arrayClass.newInstance(GetJavaClass("java.lang.Byte").TYPE, 5);
I would like to call out Kris who posted a comment on Base64 Encoding for PeopleSoft stating that the older method no longer worked. I happened to be working on zipping files with PeopleCode the week before Kris's comment and discovered the same issue and resolution. Very timely.