Unable To Apply Formatting To SnakeYaml Upon Serialisation

Bhrein Brannick

necitită,

23 apr. 2020, 08:00:5223.04.2020

– SnakeYAML

Hi there,

I opened this issue to Jackson regarding customising the Serialisation of a pojo

https://github.com/FasterXML/jackson-dataformats-text/issues/185

They have informed me that it's essentially low level thinkering of the SnakeYaml settings. From looking at that code base within `Jackson` I found the Snake classes that does that.

Atm Jackson produces sample yaml like so

name: "OuterYamlElementName"
label: "OuterYamlElementLabel"
fields:
label: "outerYamlFieldLabel"
value: "outerYamlFieldValue"
isRequired: true
toggle: "+BEYWAYS-Outer-Yaml-Field"
elements:
name: "InnerYamlElementDepthOneName"
label: "InnerYamlElementDepthOneLabel"
fields:
- label: "innerYamlFieldsDepthOneItemOneLabel"
value: "innerYamlFieldsDepthOneItemOneValue"
isRequired: true
toggle: "-BEYWAYS-Inner-Yaml-Fields-Depth-One-Item-One"
- label: "innerYamlFieldsDepthOneItemTwoLabel"
value: "innerYamlFieldsDepthOneItemTwoValue"
isRequired: false
toggle: "-BEYWAYS-Inner-Yaml-Element-Depth-One"
toggle: "+BEYWAYS-Outer-Yaml-Element"

however I'd like the yaml to be generated like so:

name: "OuterYamlElementName"
label: "OuterYamlElementLabel"
fields:
- {label: "outerYamlFieldLabel", value: "outerYamlFieldValue", isRequired: true, toggle: "+BEYWAYS-Outer-Yaml-Field"}
elements:
name: "InnerYamlElementDepthOneName"
label: "InnerYamlElementDepthOneLabel"
fields:
- { label: "innerYamlFieldsDepthOneItemOneLabel", value: "innerYamlFieldsDepthOneItemOneValue", isRequired: true, toggle: "-BEYWAYS-Inner-Yaml-Fields-Depth-One-Item-One" }
- { label: "innerYamlFieldsDepthOneItemTwoLabel", value: "innerYamlFieldsDepthOneItemTwoValue", isRequired: false }
toggle: "-BEYWAYS-Inner-Yaml-Element-Depth-One"
toggle: "+BEYWAYS-Outer-Yaml-Element"

Reason been the Yaml produced is relatively big and I like it to be generated more condensed if possible (I'm only providing a sample atm).

Here is where those settings are configured

https://github.com/FasterXML/jackson-dataformats-text/blob/master/yaml/src/main/java/com/fasterxml/jackson/dataformat/yaml/YAMLGenerator.java#L301

I have tried some other settings for example

opt.setDefaultFlowStyle(FlowStyle.Flow);
opt.setMultiLineFlow(true);

unfortunately to no avail. Would anybody know what settings are needed to create the desired structure above? Many thanks in advance.

Andrey Somov

necitită,

24 apr. 2020, 03:32:3324.04.2020

– snakeya...@googlegroups.com

Hi,

you can try to use

FlowStyle.AUTO

Cheers,

Andrey

Bhrein Brannick

necitită,

24 apr. 2020, 04:15:2524.04.2020

– SnakeYAML

Hi Andrey,

Tried that option too but that didn't work for me. Actually very little change in structure.

Cheers,

~Bhréin

Andrey Somov

necitită,

24 apr. 2020, 08:23:0924.04.2020

– snakeya...@googlegroups.com

YAML provides a zillion of ways to output a document.

Feel free to learn how it is done for AUTO and propose a more flexible way.

Cheers,

Andrey

Bhrein Brannick

necitită,

24 apr. 2020, 08:41:4024.04.2020

– SnakeYAML

Hi Andrey,

I cloned the Jackson repo & tweaked a lot of those `DumperSettings` that you are referencing in this thread. They didn't create the structure I'm looking for hence me asking.

I know when I serialise the pojo directly using Snake via `Yaml.dump()` I'm very close to getting the desired structure. I'm assuming that has default `DumperSettings`. Maybe if you point me to that it may help with the above.

Thanks again in advance as to any help with the above.

Cheers,

~Bhréin

Andrey Somov

necitită,

24 apr. 2020, 08:49:5924.04.2020

– snakeya...@googlegroups.com

If you already played with DumperOptions and it was not enough then you have to change the code.

Serializer creates sequence of Events from a Node.
Emitter translates Events to tokens. 
Together they are flexible to output anything.

Good luck,

Andrey

Andrey Somov

necitită,

24 apr. 2020, 09:09:2624.04.2020

– snakeya...@googlegroups.com

For your information.

Jackson (in its master branch) already switched to SnakeYAML Engine.

It is probable better to implement your way in SnakeYAML Engine (https://bitbucket.org/asomov/snakeyaml-engine/src/master/)

Cheers,

Andrey

Bhrein Brannick

necitită,

24 apr. 2020, 09:23:3624.04.2020

– SnakeYAML

Hi Andrey,

Yes I seen that already. I looked at Jackson repo and from that I see that snakeyaml-engine was been uptaken.

In any case I will try some of the points you mentioned above in the thread. Have a nice day.

Best Regards,

~Bhréin

Andrey Somov

necitită,

24 apr. 2020, 09:35:0924.04.2020

– snakeya...@googlegroups.com

When this is accepted you can use the latest version.https://github.com/FasterXML/jackson-dataformats-text/pull/196

But nodes and events did not change at all.

Andrey

Bhrein Brannick

necitită,

24 apr. 2020, 09:47:5724.04.2020

– SnakeYAML

Nice. Maybe I'm missing something but doesn't that repo already use version 2.1

https://github.com/FasterXML/jackson-dataformats-text/blob/master/yaml/pom.xml#L32

The above link suggests that 2.1 is already up taken in master which is what I have been using for the last couple of days.

Andrey Somov

necitită,

24 apr. 2020, 10:19:5924.04.2020

– snakeya...@googlegroups.com

Thank you very much !!!

I forgot that I have already upgraded it :-)

Now I have made another one: https://github.com/FasterXML/jackson-dataformats-text/pull/197

Cheers,

Andrey

Uday Bhaskar Sarma Seetamraju

necitită,

28 apr. 2020, 10:33:2028.04.2020

– snakeya...@googlegroups.com

Please take a look at this answer on StackOverflow.. that is responding to a similar need.

https://stackoverflow.com/a/48281824/7351734

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