CsvParserWithLinesAsMap.java

   1 package org.argeo.util;
   2
   3 import java.util.HashMap;
   4 import java.util.List;
   5 import java.util.Map;
   6
   7 import org.argeo.ArgeoException;
   8
   9 /**
  10  * CSV parser allowing to process lines as maps whose keys are the header
  11  * fields.
  12  */
  13 public abstract class CsvParserWithLinesAsMap extends CsvParser {
  14
  15         /**
  16          * Actually processes a line.
  17          *
  18          * @param lineNumber
  19          *            the current line number, starts at 1 (the header, if header
  20          *            processing is enabled, the first lien otherwise)
  21          * @param line
  22          *            the parsed tokens as a map whose keys are the header fields
  23          */
  24         protected abstract void processLine(Integer lineNumber,
  25                         Map<String, String> line);
  26
  27         protected final void processLine(Integer lineNumber, List<String> header,
  28                         List<String> tokens) {
  29                 if (header == null)
  30                         throw new ArgeoException("Only CSV with header is supported");
  31                 Map<String, String> line = new HashMap<String, String>();
  32                 for (int i = 0; i < header.size(); i++) {
  33                         String key = header.get(i);
  34                         String value = null;
  35                         if (i < tokens.size())
  36                                 value = tokens.get(i);
  37                         line.put(key, value);
  38                 }
  39                 processLine(lineNumber, line);
  40         }
  41
  42 }