Empty text is ignored in @JacksonXmlText

[aarcangeli]

Hi, I'm trying to parse an xml file like this:

<?xml version='1.0'?>
<replacements xml:space='preserve' incomplete_format='false'>
<replacement offset='106' length='8'>    </replacement>
</replacements>

This xml is generated by clang-format -output-replacements-xml, so it is critical that whitespaces are correctly parsed as string values.

However, when I parse it with XmlMapper, the returned value is null

assertEquals("    ", response.replacements[0].value) // value is null

My setup

build.gradle.kts:

dependencies {
  implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-xml:2.14.1")
}

@JacksonXmlRootElement(localName = "replacements")
public class ClangFormatResponse {

  public static ClangFormatResponse unmarshal(@NotNull String stdout) {
    try {
      XmlMapper xmlMapper = new XmlMapper();
      return xmlMapper.readValue(stdout, ClangFormatResponse.class);
    }
    catch (JsonProcessingException e) {
      throw new RuntimeException(e);
    }
  }

  @JacksonXmlProperty(localName = "space", isAttribute = true)
  public String space;

  @JacksonXmlProperty(localName = "incomplete_format", isAttribute = true)
  public boolean incompleteFormat;

  @JacksonXmlProperty(localName = "replacement")
  @JacksonXmlElementWrapper(useWrapping = false)
  public final List<ClangFormatReplacement> replacements = new ArrayList<>();
}

public class ClangFormatReplacement {
  @JacksonXmlProperty(isAttribute = true)
  public int offset;

  @JacksonXmlProperty(isAttribute = true)
  public int length;

  @JacksonXmlText(false)
  public String value;
}

My debug

From my analysis, I found that the text value is ignored due to this check