Jackson json parser exception

Question

I use Jackson 2.2.3 on my latest android Project. I have included the jars (core, databingin, annotation) as jars to my android libs folder.

But i get this error when reading / parsing json. Write json from an objects works.

I call this:

objectMapper.readValue(inputStream, SubscriptionWrapper.class);

com.fasterxml.jackson.databind.JsonMappingException: Conflicting setter definitions for property "wallpaper": android.content.Context#setWallpaper(1 params) vs android.content.Context#setWallpaper(1 params) at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:272) com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:272) com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:247) com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:146) at com.fasterxml.jackson.databind.DeserializationContext.findContextualValueDeserializer(DeserializationContext.java:305) at com.fasterxml.jackson.databind.deser.std.StdDeserializer.findDeserializer(StdDeserializer.java:634) at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(BeanDeserializerBase.java:438) at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:298) ... at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2884) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2034)

My class looks like this

@JsonIgnoreProperties(ignoreUnknown = true)
@JsonInclude(Include.NON_NULL)
public class SubscriptionWrapper {

    @JsonProperty("device")
    private Device device;

    @JsonProperty("subscriptions")
    private List<Subscription> subscriptions;

    public SubscriptionWrapper() {
    }

    public SubscriptionWrapper(Device device, List<Subscription> subscriptions) {
        this.device = device;
        this.subscriptions = subscriptions;
    }

    public Device getDevice() {
        return device;
    }

    public void setDevice(Device device) {
        this.device = device;
    }

    public List<Subscription> getSubscriptions() {
        return subscriptions;
    }

    public void setSubscriptions(List<Subscription> subscriptions) {
        this.subscriptions = subscriptions;
    }

}

Any idea what could be wrong? I have used jackson in other projects without any issues.

sockeqwe sockeqwe · Accepted Answer · 2013-12-11T16:07:30

Damn, I found the solution:

my Device class has a method

public void setStatistics(Context c);

that will be called to fulfill statistics about the users device.

The method is called from jackson, even if in the json that should be parsed do not contains a "statistics" element. Annotating the method with @JsonIgnore has solved the problem.

@JsonIgnore
public void setStatistics(Context c)

So I have to annotated every single method or configure jackson to use field instead of methods for pasing as default.

Jackson json parser exception

1 Answers