MismatchedInputException when deserializing a polymorphic class with JacksonXmlElementWrapper

[ser0l]

Using jackson 2.9.6, i get an exception:

com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.util.ArrayList` out of VALUE_STRING token

When trying to deserialize a polymorphic object with an arraylist wrapper present, when type attribute is not positioned first in XML. See the following code for an example (incorrectDeserialization test throws the exception):

package com.wrappertest;

import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlElementWrapper;
import org.junit.Test;

import java.util.ArrayList;
import java.util.Arrays;

import static com.fasterxml.jackson.annotation.JsonSubTypes.*;
import static com.fasterxml.jackson.annotation.JsonTypeInfo.*;
import static org.junit.Assert.assertEquals;

public class ListWrapperWithPolymorphicTypesTest {
    /**************** classes ****************/
    public static class ListWrapper {
        @JacksonXmlElementWrapper(useWrapping = false)
        public ArrayList<Long> item;
    }

    @JsonTypeInfo(use = Id.NAME, include = As.PROPERTY, property = "type")
    @JsonSubTypes({
            @Type(value = ChildClass.class, name = "ChildClass")
    })
    public static abstract class BaseClass {
        public Long baseId;
    }

    public static class ChildClass extends BaseClass {
        public ListWrapper someIds;
    }

    /**************** tests ****************/
    private final XmlMapper xmlMapper = new XmlMapper();

    @Test
    public void correctDeserialization() throws Exception {
        ChildClass value = (ChildClass) xmlMapper.readValue(goodXml(), BaseClass.class);
        doAsserts(value);
    }

    @Test
    public void incorrectDeserialization() throws Exception {
        ChildClass value = (ChildClass) xmlMapper.readValue(badXml(), BaseClass.class);
        doAsserts(value);
    }

    private void doAsserts(ChildClass value) {
        assertEquals(Long.valueOf(123), value.baseId);
        assertEquals(Arrays.asList(1L, 2L), value.someIds.item);
    }

    /** type attribute positioned first, works correctly */
    private String goodXml() {
        return "<root>" +
               "  <type>ChildClass</type>" +
               "  <baseId>123</baseId>" +
               "  <someIds>" +
               "    <item>1</item>" +
               "    <item>2</item>" +
               "  </someIds>" +
               "</root>";
    }

    /** type attribute positioned second, throws exception when parsed */
    private String badXml() {
        return "<root>" +
               "  <baseId>123</baseId>" +
               "  <type>ChildClass</type>" +
               "  <someIds>" +
               "    <item>1</item>" +
               "    <item>2</item>" +
               "  </someIds>" +
               "</root>";
    }
}

Full stack trace

[ailjushkin]

@cowtowncoder @prb @christophercurrie Hey guys, can you please take a look at this, thank you.

[Arcnor]

@ailjushkin not sure why you mention me, I'm not a developer for this project. Good luck anyway!

[cowtowncoder]

Cannot reproduce any more; looks like this was fixed in 2.10.0. Possibly due to fix for #242.