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Serializing List with null values leads to corrupt CSV #83
Description
If I serialize a List of objects, e.g. a list of POJOs and the list contains null values, the next line after the null value is corrupt.
Example:
List<MyPojo> list = Arrays.asList(
new MyPojo("foo", "bar", 123),
null,
new MyPojo("test", "abc", 42)
);
gets serialized to
foo,bar,123
,abc,42
instead of the expected output of
foo,bar,123
test,abc,42
Tested with 2.5.4 and 2.6.0-rc4.
Here is a complete test case:
public class JacksonCsvNullInListTest {
@Test
public void testNullInList() throws JsonProcessingException {
CsvMapper mapper = new CsvMapper();
CsvSchema schema = mapper.schemaFor(MyPojo.class);
final ObjectWriter writer = mapper.writer(schema);
List<MyPojo> list = Arrays.asList(
new MyPojo("foo", "bar", 123),
null,
new MyPojo("test", "abc", 42)
);
String expectedCsv = "foo,bar,123\ntest,abc,42\n";
String actualCsv = writer.writeValueAsString(list);
assertEquals(expectedCsv, actualCsv);
}
private static class MyPojo {
private String prop1;
private String prop2;
private Integer prop3;
public MyPojo(String prop1, String prop2, Integer prop3) {
this.prop1 = prop1;
this.prop2 = prop2;
this.prop3 = prop3;
}
public String getProp1() {
return prop1;
}
public String getProp2() {
return prop2;
}
public Integer getProp3() {
return prop3;
}
}
}