Fetch Phase In A Trace File?

Oracle version: 11.2.0.3.0 Enterprise Edition
OS - IBM/AIX RISC System/6000

I am trying to generate a trace file from a piece of code executed by java server. What I asked the java developer to do is to place this block immediately after establishing a connection:

BEGIN
  EXECUTE IMMEDIATE 'ALTER SESSION SET TRACEFILE_IDENTIFIER = ''M1''';
  dbms_monitor.session_trace_enable(waits => FALSE, binds => TRUE);
END;And at the end of the logical java block of code:

BEGIN
  dbms_monitor.session_trace_disable;
END;

What I want to know is how many rows the java server fetches after executing one particular select statement, because they complain about receiving less in count rows from the select statement than expecting. For example, if I execute the same sql query in sqlplus session, then I fetch let's say 1000 rows. When the same query is executed from java side, the fetched rows are less in count, let's say 500.And because I doubt it, I wanted to trace to see what actually is executed and how.the excerpt of the trace file I see exactly the same query which I execute myself in a sqplus session.is no fine-grained control on the udnerlying tables in the query.

And my question is, how to interpret the FETCH phase of the cursor (for the select statement)?example, if I see one FETCH for this cursor, does this mean that the java server has fetched only one row?If I see 100 FETCHes, does this mean they fetched 100 rows from the cursor?

Here is a short excerpt from the trace file (don't crucify me for the query and the obvious denormalized design of the tables, this is not invented by me):

PARSING IN CURSOR #4573587152 len=667 dep=0 uid=737 oct=3 lid=737 tim=17685516462413 hv=954980718 ad='70000006d3e4940' sqlid='69pm96nwfrqbf'
select /* ordered */ o.id, nvl(o.par_id, -1) as par_id, o.NAME_GER, o.NAME_ENG, o.NAME_ESP, o.NAME_ITL,o.NAME_FRA, decode(lo.lflag, 'Y', 'L', 'N') as leaf_or_node, lo.distance + 1 as "LEVEL",  to_char(o.beg_date,

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