You should check multiple input format class which enables you to have more input formats for same mapper.
Regards, Dino On Apr 2, 2013 9:49 AM, "Yanbo Liang" <yanboha...@gmail.com> wrote: > protected void map(KEYIN key, VALUEIN value, > Context context) throws IOException, > InterruptedException { > context.write((KEYOUT) key, (VALUEOUT) value); > } > > Context is a parameter that the execute environment will pass to the map() > function. > You can just use it in the map() function. > > > 2013/4/2 Abhinav M Kulkarni <abhinavkulka...@gmail.com> > >> To be precise, I am using Hadoop 1.0.4. >> >> There is no local variable or argument named context in the map function. >> >> Thanks, >> Abhinav >> >> >> On 04/01/2013 09:06 PM, Azuryy Yu wrote: >> >> I supposed your input splits are FileSplit, if not, you need to: >> >> InputSplit split = context.getInputSplit(); >> >> if (split instanceof FileSplit){ >> Path path = ((FileSplit)split).getPath(); >> } >> >> >> >> >> On Tue, Apr 2, 2013 at 12:02 PM, Azuryy Yu <azury...@gmail.com> wrote: >> >>> In your map function add following: >>> >>> Path currentInput = ((FileSplit)context.getInputSplit()).getPath(); >>> >>> then: >>> >>> if (currentInput is first ){ >>> ................ >>> } >>> else{ >>> .................. >>> } >>> >>> >>> >>> >>> On Tue, Apr 2, 2013 at 11:55 AM, Abhinav M Kulkarni < >>> abhinavkulka...@gmail.com> wrote: >>> >>>> Hi, >>>> >>>> I have a following scenario: >>>> >>>> >>>> - Two mappers (acting on two different files) and one reducer >>>> - The mapper code for two different files is the same, except for >>>> minor change which depends on which file is being read >>>> - Essentially assume there is an if statement - if first file is >>>> being read do this else do this >>>> >>>> So how do I provide this context to map function i.e. file name or say >>>> a boolean flag variable indicating the file being read? >>>> >>>> Thanks, >>>> Abhinav >>>> >>> >>> >> >> >