JSON to or from YAML

JSON to YAML

If you have a javax.json.JsonObject or javax.json.JsonArray, you can easily create a YamlMapping or YamlSequence, by using the methods Yaml.fromJsonObject(...) and Yaml.fromJsonArray(...) respectively.

Assuming that variable jsonTeam holds the following JSON:

{
  "architect": "amihaiemil",
  "devops": [
    "rultor",
    "0pdd"
  ],
  "developers": [
    "amihaiemil",
    "salikjan",
    "SherifWally"
  ]
}

final YamlMapping team = Yaml.fromJsonObject(jsonTeam);
System.out.println(team);

The following YAML will be printed:

architect: amihaiemil
devops: 
  - rultor
  - 0pdd
developers: 
  - amihaiemil
  - salikjan
  - SherifWally

YAML to JSON

YamlMapping offers the method toJsonObject() which will turn it into a javax.json.JsonObject.

• mappings containing keys which are not strings cannot be converted to JSON, because JSON does not support complex keys. You will get an exception if you'll try to convert a mapping which has non-scalar keys.

YamlSequence offers the method toJsonArray() which will turn it into a javax.json.JsonArray.

YamlStream offers the method toJsonArray() which will turn it into a javax.json.JsonArray.

YamlNode offers the method toJsonValue() which will turn it into a javax.json.JsonValue.

Pay attention: to use this functionality, you will need to have an implementation of the JSON Pocessing (JSON-P)/JSR 374 Specification in your classpath (eo-yaml only offers the API of the spec, you need to add the implementation as dependency).