To answer myself: the above doesn't work because mutator doesn't update writerIndex (only ArrowBuf.writeXXX does).
Still wondering if there is a good way of setting validity map in Java? Li On Tue, Jan 3, 2017 at 5:11 PM, Li Jin <ice.xell...@gmail.com> wrote: > Hi, > > I am working on a function where I want to create an arrow record batch > from Spark dataset. I am curious what's the best way to create validity > bitmap buffer for a field? > > I found BitVector which has a mutator > <https://github.com/apache/arrow/blob/master/java/vector/src/main/java/org/apache/arrow/vector/BitVector.java#L425> > that > seems to do the thing I want, I am wondering should I: > > (1) create a BitVector > (2) set the value in the BitVector using the mutator > (3) pass the ArrowBuf from the BitVector > <https://github.com/apache/arrow/blob/45ed7e7a36fb2a69de468c41132b6b3bbd270c92/java/vector/src/main/java/org/apache/arrow/vector/BaseDataValueVector.java#L116> > to > the record batch? > > Thanks, > Li >
