GAMS Data Exchange API

Example 8: Java program
Page 26
}
}
}
rc = gdx.gdxOpenRead(arguments[2], ref ErrNr);
if (ErrNr != 0) ReportIOError(ErrNr);
//read x variable back (non-default level values only)
gdx.gdxFileVersion(ref Msg, ref Producer);
Console.WriteLine("GDX file written using version: " + Msg);
Console.WriteLine("GDX file written by: " + Producer);
if (gdx.gdxFindSymbol("x", ref VarNr) == 0)
{
Console.WriteLine("**** Could not find variable X");
return 1;
}
gdx.gdxSymbolInfo(VarNr, ref VarName, ref Dimen, ref VarTyp);
if (Dimen != 2 || VarTyp != gamsglobals.dt_var)
{
Console.WriteLine("**** X is not a two dimensional variable");
return 1;
}
if (gdx.gdxDataReadStrStart(VarNr, ref NrRecs) == 0) ReportGDXError();
Console.WriteLine("Variable X has " + NrRecs + " records");
while (gdx.gdxDataReadStr(ref Indx, ref Values, ref N) != 0)
{
if(Values[gamsglobals.val_level] == 0.0) //skip level = 0.0 is default
continue;
for (D=0; D