[CSV-220] Add API

org.apache.commons.csv.CSVFormat.withSystemRecordSeparator().

src/changes/changes.xml

@@ -42,6 +42,7 @@
       <action issue="CSV-217" type="add" dev="ggregory" due-to="Korolyov Alexei">Add autoFlush option for CsvPrinter. PR #24.</action>
       <action issue="CSV-219" type="fix" dev="ggregory" due-to="Zhang Hongda">The behavior of quote char using is not similar as Excel does when the first string contains CJK char(s).</action>
       <action issue="CSV-172" type="fix" dev="ggregory" due-to="Andrew Pennebaker">Don't quote cells just because they have UTF-8 encoded characters.</action>
+      <action issue="CSV-220" type="add" dev="ggregory" due-to="Gary Gregory">Add API org.apache.commons.csv.CSVFormat.withSystemRecordSeparator().</action>
     </release>
     <release version="1.5" date="2017-09-03" description="Feature and bug fix release">
       <action issue="CSV-203" type="fix" dev="ggregory" due-to="Richard Wheeldon, Kai Paroth">withNullString value is printed without quotes when QuoteMode.ALL is specified; add QuoteMode.ALL_NON_NULL. PR #17.</action>

src/main/java/org/apache/commons/csv/CSVFormat.java

@@ -1925,6 +1925,22 @@ public final class CSVFormat implements Serializable {
                 skipHeaderRecord, allowMissingColumnNames, ignoreHeaderCase, trim, trailingDelimiter, autoFlush);
     }
 
+    /**
+     * Returns a new {@code CSVFormat} with the record separator of the format set to the operating system's line
+     * separator string, typically CR+LF on Windows and LF on Linux.
+     *
+     * <p>
+     * <strong>Note:</strong> This setting is only used during printing and does not affect parsing. Parsing currently
+     * only works for inputs with '\n', '\r' and "\r\n"
+     * </p>
+     *
+     * @return A new CSVFormat that is equal to this but with the operating system's line separator stringr
+     * @since 1.6
+     */
+    public CSVFormat withSystemRecordSeparator() {
+        return withRecordSeparator(System.getProperty("line.separator"));
+    }
+
     /**
      * Returns a new {@code CSVFormat} to add a trailing delimiter.
      *

src/test/java/org/apache/commons/csv/CSVFormatTest.java

@@ -640,7 +640,7 @@ public class CSVFormatTest {
     public void testToString() {
 
         final CSVFormat cSVFormat = CSVFormat.POSTGRESQL_TEXT;
-        final String string = cSVFormat.INFORMIX_UNLOAD.toString();
+        final String string = CSVFormat.INFORMIX_UNLOAD.toString();
 
         assertEquals("Delimiter=<|> Escape=<\\> QuoteChar=<\"> RecordSeparator=<\n> EmptyLines:ignored SkipHeaderRecord:false", string);
 
@@ -1090,4 +1090,10 @@ public class CSVFormatTest {
         assertEquals(String.valueOf(LF), formatWithRecordSeparator.getRecordSeparator());
     }
 
+    @Test
+    public void testWithSystemRecordSeparator() throws Exception {
+        final CSVFormat formatWithRecordSeparator = CSVFormat.DEFAULT.withSystemRecordSeparator();
+        assertEquals(System.getProperty("line.separator"), formatWithRecordSeparator.getRecordSeparator());
+    }
+
 }