package com.netflix.astyanax.util; import java.io.IOException; import java.io.Reader; import java.util.ArrayList; import java.util.List; import org.apache.cassandra.utils.Pair; import org.apache.commons.csv.CSVParser; /** * * @author elandau * */ public class CsvRecordReader implements RecordReader { private CSVParser parser; private boolean hasHeaderLine = true; private String[] names = null; public CsvRecordReader(Reader reader) { this.parser = new CSVParser(reader); } public CsvRecordReader setHasHeaderLine(boolean flag) { this.hasHeaderLine = flag; return this; } public CsvRecordReader setNames(String... names) { this.names = names; return this; } @Override public void start() throws IOException { // First line contains the column names. First column expected to be the // row key if (hasHeaderLine) { names = parser.getLine(); } } @Override public void shutdown() { } @Override public List<Pair<String, String>> next() throws IOException { // Iterate rows String[] row = parser.getLine(); if (null == row) return null; List<Pair<String, String>> columns = new ArrayList<Pair<String, String>>(); // Build row mutation for all columns for (int i = 0; i < row.length; i++) { if (i >= names.length) { // Ignore past size of names break; } columns.add(new Pair<String, String>(names[i], row[i])); } return columns; } }