Ok, so, one thing I missed; this is wrong: @JsonIdentityInfo(generator = ObjectIdGenerators.None.class)
as `None` here means "disable ObjectId handling". So even if you never generate Object Ids, there has to be handler. `StringIdGenerator` fits the bill I think. There was another problem, but I was able to make issue #123 work (fix will be in 2.9.9 / 2.10.0) for this simple case. So it is possible this particular usage might work with new version. -+ Tatu +- On Mon, Feb 18, 2019 at 10:27 PM Tatu Saloranta <[email protected]> wrote: > > Ok, yes, I can reproduce this, and no, it should fail. Issue now: > > https://github.com/FasterXML/jackson-dataformats-text/issues/123 > > -+ Tatu +- > > On Fri, Feb 15, 2019 at 9:32 AM John Passaro <[email protected]> wrote: > > > > Here is my best attempt at a minimal example: > > > > class YamlScratch { > > > > private static final String YAML_CONTENT = "" + > > "foo: &foo\n" + > > " value: bar\n" + > > "boo: *foo\n"; > > > > public static void main(String[] args) throws Exception { > > ScratchModel yamlScratch = new ObjectMapper( > > new YAMLFactory() > > ).readValue(YAML_CONTENT, ScratchModel.class); > > System.out.printf("foo = %s, boo=%s%n", yamlScratch.foo, > > yamlScratch.boo); > > } > > > > @JsonIdentityInfo(generator = ObjectIdGenerators.None.class) > > public static class ScratchModel { > > @JsonProperty("foo") > > StringHolder foo; > > > > @JsonProperty("boo") > > StringHolder boo; > > } > > @JsonIdentityInfo(generator = ObjectIdGenerators.None.class) > > public static class StringHolder { > > @JsonProperty("value") > > String value; > > > > @Override > > public String toString() { > > return value; > > } > > } > > } > > > > Output: > > > > Exception in thread "main" > > com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot > > construct instance of `YamlScratch$StringHolder` (although at least one > > Creator exists): no String-argument constructor/factory method to > > deserialize from String value ('foo') > > at [Source: (StringReader); line: 3, column: 6] (through reference chain: > > YamlScratch$ScratchModel["boo"]) > > at > > com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:63) > > at > > com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1329) > > at > > com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1031) > > at > > com.fasterxml.jackson.databind.deser.ValueInstantiator._createFromStringFallbacks(ValueInstantiator.java:370) > > at > > com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.createFromString(StdValueInstantiator.java:314) > > at > > com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromString(BeanDeserializerBase.java:1351) > > at > > com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:170) > > at > > com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:161) > > at > > com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:136) > > at > > com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:287) > > at > > com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151) > > at > > com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4001) > > at > > com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2992) > > at YamlScratch.main(scratch_8.java:17) > > > > Attached screenshot shows Jackson libraries and versions being referenced - > > short version is that everything is 2.9.1, but jackson-annotations for some > > reason is 2.9.0. This doesn't seem to stop any other Jackson functionality > > from working, so I suspect it is not the problem, but I'm highlighting it > > for you just in case. > > > > -- > > You received this message because you are subscribed to the Google Groups > > "jackson-user" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [email protected]. > > To post to this group, send email to [email protected]. > > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "jackson-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. For more options, visit https://groups.google.com/d/optout.
