Closed
Description
Describe the bug
When defining a Guava ImmutableList on org.immutables.value.Value.Immutable objects to correctly deserialize both from a single JSON object and also from an array with the ACCEPT_SINGLE_VALUE_AS_ARRAY annotation on the field it fails to do so.
In case of using a java.util.List instead of the Guava type it works. Not sure if issue is within Jackson itself or somewhere else, please advise.
Version information
2.14
To Reproduce
To reproduce I created an Immutable type with a single list field which should accept both a single object and an array as a JSON input (set with ACCEPT_SINGLE_VALUE_AS_ARRAY).
@Value.Immutable
public interface ExampleInterface {
@JsonFormat(with = JsonFormat.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY)
ImmutableList<ExampleLine> getLines();
}
@Value.Immutable
public interface ExampleLineInterface {
String getData();
}
class Scratch {
public static void main(String[] args) {
/*
{
lines":
{
"data": "something"
}
}
*/
String example = "{ " +
" \"lines\": \n" +
" {\n" +
" \"data\": \"something\"\n" +
" }" +
" }";
try {
Example actual = getObjectMapper().readValue(example, Example.class);
System.out.println(actual);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
}
private static ObjectMapper getObjectMapper() {
return JsonMapper.builder()
.visibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.NONE)
.visibility(PropertyAccessor.CREATOR, JsonAutoDetect.Visibility.ANY)
.visibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY)
.propertyNamingStrategy(PropertyNamingStrategies.SNAKE_CASE)
.enable(DeserializationFeature.FAIL_ON_NUMBERS_FOR_ENUMS)
.enable(DeserializationFeature.FAIL_ON_READING_DUP_TREE_KEY)
.enable(DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_USING_DEFAULT_VALUE)
.enable(MapperFeature.BLOCK_UNSAFE_POLYMORPHIC_BASE_TYPES)
.disable(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS)
.disable(DeserializationFeature.READ_DATE_TIMESTAMPS_AS_NANOSECONDS)
.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)
.addModule(new GuavaModule())
.addModule(new FormattedNumberIdModule())
.addModule(new JavaTimeModule())
.addModule(new Jdk8Module())
.addModule(new ParameterNamesModule())
.build();
}
}throws
com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type `com.google.common.collect.ImmutableList<java.lang.Object>` from Object value (token `JsonToken.START_OBJECT`)
at [Source: (String)"{ "lines":
{
"data": "something"
} }"; line: 2, column: 12] (through reference chain: com.picnic.supplierinterface.edeka.reddi.api.model.Example$Json["lines"])
while the same thing but with a java.util.List type:
@Value.Immutable
public interface ExampleInterface {
@JsonFormat(with = JsonFormat.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY)
List<ExampleLine> getLines();
}
deserializes correctly and prints:
Example{lines=[ExampleLine{data=something}]}