Univocity - How to return one bean per row using iterator style?

Question

Introduction

I am building a process to merge a few big sorted csv files. I am currently looking into using Univocity to do this. The way I setup the merge is to us

Answer 1

There are two approaches to read iteratively instead of loading everything in memory, the first one is to use a BeanProcessor instead of BeanListProcessor:

settings.setRowProcessor(new BeanProcessor
(Address.class) {
        @Override
        public void beanProcessed(Address address, ParsingContext context) {
            // your code to process the each parsed object here!
        }

To read beans iteratively without a callback (and to perform some other common processes), we created a CsvRoutines class (which extends from AbstractRoutines - more examples here):

    File input = new File("/path/to/your.csv")

    CsvParserSettings parserSettings = new CsvParserSettings();
    //...configure the parser

    // You can also use TSV and Fixed-width routines
    CsvRoutines routines = new CsvRoutines(parserSettings); 
    for (Address address : routines.iterate(Address.class, input, "UTF-8")) {
        //process your bean
    }

Hope this helps!