Java: Jackson polymorphic JSON deserialization of an object with an interface property?
You should use JsonTypeInfo.As.EXTERNAL_PROPERTY instead of JsonTypeInfo.As.PROPERTY. In this scenario your Asset class should look like this:
class Asset { @JsonTypeInfo( use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXTERNAL_PROPERTY, property = "type") @JsonSubTypes({ @JsonSubTypes.Type(value = ImageAssetProperties.class, name = "image"), @JsonSubTypes.Type(value = DocumentAssetProperties.class, name = "document") }) private AssetProperties properties; public AssetProperties getProperties() { return properties; } public void setProperties(AssetProperties properties) { this.properties = properties; } @Override public String toString() { return "Asset [properties("+properties.getClass().getSimpleName()+")=" + properties + "]"; }}See also my answer in this question: Jackson JsonTypeInfo.As.EXTERNAL_PROPERTY doesn't work as expected.