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https://issues.apache.org/jira/browse/CSV-203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15734742#comment-15734742
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Thai H commented on CSV-203:
----------------------------
Added link to CSV-93 which is suggesting same idea about representing NULL
values
> withNullString value is printed without quotes when QuoteMode.ALL is specified
> ------------------------------------------------------------------------------
>
> Key: CSV-203
> URL: https://issues.apache.org/jira/browse/CSV-203
> Project: Commons CSV
> Issue Type: Bug
> Components: Printer
> Affects Versions: 1.3, 1.4
> Reporter: Richard Wheeldon
> Labels: regression
>
> When setting QuoteMode.ALL is set we expect all values to be quoted, even
> those set as a default. This works in Commons 1.2 but doesn't in 1.4.
> Consider the following program:
> {code}
> import org.apache.commons.csv.QuoteMode;
> import org.apache.commons.csv.CSVFormat;
> import org.apache.commons.csv.CSVPrinter;
> public class CommonsCsvIsSlightlyBroken {
>
> public static void main(String[] args) throws Exception {
> CSVFormat format = CSVFormat.EXCEL
> .withNullString("N/A")
> .withIgnoreSurroundingSpaces(true)
> .withQuoteMode(QuoteMode.ALL);
> CSVPrinter printer = new CSVPrinter(System.out, format);
> printer.printRecord(new Object[] { null, "Hello", null, "World" });
> }
> }
> {code}
> For 1.2 we get quoted output:
> {code}
> richard@kichemaru:~/$ java -cp
> ~/.m2/repository/org/apache/commons/commons-csv/1.2/commons-csv-1.2.jar:.
> CommonsCsvIsSlightlyBroken
> "N/A","Hello","N/A","World"
> {code}
> When run with 1.4 we get unquoted output for default fields:
> {code}
> richard@kichemaru:~/$ java -cp
> ~/.m2/repository/org/apache/commons/commons-csv/1.4/commons-csv-1.4.jar:.
> CommonsCsvIsSlightlyBroken
> N/A,"Hello",N/A,"World"
> {code}
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