IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
final FrameTupleAccessor fta = new FrameTupleAccessor(ctx.getFrameSize(),
recordDescProvider.getInputRecordDescriptor(getActivityId(), 0));
final int fieldOutputCount = recordDescProvider.getOutputRecordDescriptor(getActivityId(), 0).getFieldCount();
final ByteBuffer frame = ctx.allocateFrame();
final FrameTupleAppender appender = new FrameTupleAppender(ctx.getFrameSize(), fieldOutputCount);
final short partitionId = (short) ctx.getTaskAttemptId().getTaskId().getPartition();
final ITreeNodeIdProvider nodeIdProvider = new TreeNodeIdProvider(partitionId, dataSourceId, totalDataSources);
final String nodeId = ctx.getJobletContext().getApplicationContext().getNodeId();
final DynamicContext dCtx = (DynamicContext) ctx.getJobletContext().getGlobalJobData();
final String collectionName = collectionPartitions[partition % collectionPartitions.length];
final XMLParser parser = new XMLParser(false, nodeIdProvider, nodeId, frame, appender, childSeq,
dCtx.getStaticContext());
return new AbstractUnaryInputUnaryOutputOperatorNodePushable() {
@Override
public void open() throws HyracksDataException {
appender.reset(frame, true);
writer.open();
}
@Override
public void nextFrame(ByteBuffer buffer) throws HyracksDataException {