ValueInstantiator#_createFromStringFallbacks doesn't trim when value is a carriage-return string

[G.M]

We needs some help for this case :

we use :

jackson 2.9.0

jdk 1.8

XML to deserialize :

<?xml version="1.0" encoding="utf-8"?>

<RESPONSE>

<RPBODY>

<DATA>

</DATA>

</RPBODY>

</RESPONSE>

Main.java

public class JacksonTest {

    public static void main(String[] args) throws JsonParseException, IOException {

        ObjectMapper objectMapper = new XmlMapper();

        objectMapper.configure(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true);

        objectMapper.configure(DeserializationFeature.ACCEPT_EMPTY_ARRAY_AS_NULL_OBJECT, true);

        objectMapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);

        objectMapper.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true);

        objectMapper.configure(DeserializationFeature.FAIL_ON_MISSING_CREATOR_PROPERTIES, false);

        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

        

        

        JacksonTest test = new JacksonTest();

        InputStream inputStream = test.getClass().getResourceAsStream("emptyData2.xml");

        test.parse(objectMapper.getFactory(), inputStream, DataTestRoot.class, "UTF-8");

    }

    public <T> T parse(JsonFactory jfactory, InputStream in, Class<T> klass, String charset) throws JsonParseException, IOException {

        

        if (jfactory == null) {

            throw new IllegalArgumentException("this method must be used with an instance initialized with a ObjectMapper");

        }

        T result = null;

        JsonParser p = jfactory.createParser(in);

        JsonToken jToken = null;

        while ((jToken = p.nextToken()) != null) {

            if (jToken == JsonToken.FIELD_NAME) {

                String fieldName = p.getCurrentName();

                if ("RPBODY".equals(fieldName)) {

                    p.nextToken();

                    try {

                        result = p.readValueAs(klass);

                    } catch (Throwable e) {

                        throw new IOException(e);

                    }

                } else if ("RPHEADER".equals(fieldName)) {

                    p.nextToken();

                    JsonNode rpHeader = p.readValueAs(JsonNode.class);

                    String status = rpHeader.get("STATUSID").asText();

                    long statusId = 0;

                    if (NumberUtils.isNumber(status)) {

                        statusId = NumberUtils.toLong(status);

                    }

                    if (statusId < 0) {

                        throw new IOException(status);

                    }

                }

            }

        }

        return result;

    }

        

    private static class DataTestRoot {

        @JacksonXmlProperty(localName = "DATA")

        public DataListTest data;

    }

    private static class DataListTest {

        @JacksonXmlProperty(localName = "ITEM")

        @JacksonXmlElementWrapper(localName = "ITEM", useWrapping = false)

        public List<Data> datas;

    }

}

Error :

Exception in thread "main" java.io.IOException: com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `jackson.JacksonTest$DataListTest` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('

')

at [Source: (BufferedInputStream); line: 5, column: 10] (through reference chain: ch.hcuge.deja.jackson.JacksonTest$DataTestRoot["DATA"])

the error seems to be in this method : com.fasterxml.jackson.databind.deser.ValueInstantiator#_createFromStringFallbacks

the String value parsed is "\n\t\t" (cf PJ)

but no trim is done in the test if (value.length() == 0)

What's wrong ? our system to parse an XML request ? we forget something ?

thanks for your help.