java - Spring Batch - FlatFileItemWriter write to a file, close it, write to new file -

so have custom class extends flatfileitemwriter using write csv file. based on condition want finish first file , write new file. there way flatfileitemwriter?

here example of code:

@override public void write(list<? extends myobject> items) throws exception {     executioncontext stepcontext = this.stepexecution.getexecutioncontext();     int currentfileincrememnt = (int) stepcontext.get("currentfileincrement");     if(currentfileincrement== fileincrement) {         super.write(items);     }     else {         super.close();         fileincrement = currentfileincrement;         super.setheadercallback(determineheadercallback());         super.setresource(new filesystemresource("src/main/resources/" + fileincrement+ ".csv"));         super.setshoulddeleteifexists(true);         delimitedlineaggregator<myobject> dellineagg = new delimitedlineaggregator<>();         dellineagg.setdelimiter(",");         beanwrapperfieldextractor<myobject> fieldextractor = new beanwrapperfieldextractor<>();         fieldextractor.setnames(new string[] {"id", "amount"});         dellineagg.setfieldextractor(fieldextractor);         super.setlineaggregator(dellineagg);         super.write(items);     } } 

i don t understand if using custom writer or spring one. if using custom (maybe extendig spring one) use whatever want passing parameters through processor, reader o mapper. if want use spring writer should make isolated steps. give more details.