Change field case with an ObjectMapper
This problem could be solved from Jackson 2.5.0
like this:
ObjectMapper mapper = new ObjectMapper();
mapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);
From the javadoc:
com.fasterxml.jackson.databind.MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES
Feature that will allow for more forgiving deserialization of incoming JSON. If enabled, the bean properties will be matched using their lower-case equivalents, meaning that any case-combination (incoming and matching names are canonicalized by lower-casing) should work.
Note that there is additional performance overhead since incoming property names need to be lower-cased before comparison, for cases where there are upper-case letters. Overhead for names that are already lower-case should be negligible however.
Feature is disabled by default.
Since: 2.5
Instead of annotating each field, the Jackson ObjectMapper
can be configured to use a built-in or custom PropertyNamingStrategy, to apply a consistent translation between Java property/field names and JSON element names.
For example:
myObjectMapper.setPropertyNamingStrategy(PascalCaseStrategy);
Your first issue can be addressed very simply with the @JsonProperty
annotation:
// java-side class
public class Facet
{
@JsonProperty("Name")
public String name;
@JsonProperty("Value")
public String value;
}
Now the ObjectMapper
will match up the differently-cased field names. If you don't want to add annotations into your classes, you can create a Mix-in class to stand in for your Facet
:
public class FacetMixIn
{
@JsonProperty("Name")
public String name;
@JsonProperty("Value")
public String value;
}
objectMapper.getDeserializationConfig().addMixInAnnotations(Facet.class, FacetMixIn.class);
This will achieve the same thing, without requiring additional annotations in your Facet
class.