CODEWITHSUNDEEP
javajsonapache-commonsapache-commons-config
user1779715
user1779715

Reputation:

Create JSON configuration from string using Apache commons configuration

Is it possible to create a JSON configuration form a String in Apache commons configuration so that I can get some values from it?

For example, if I'd have a String containing this configuration, I'd like to be able to convert it into an org.apache.commons.configuration2.json.JSONConfiguration so that I can get values from it with the getX(nodeName) method (ex.: config.getInt("sectionA.valueB") would return 332):

{sectionA:{valueA:true, valueB:332}, sectionB:{valueA:124, valueB:"abc"}}

Would I have to wrap the string in something such as a Reader so that I can use the configuration's load(Reader) method? If yes, what would be the shortest and fastest way to do that?

Upvotes: 3

Views: 4188

Answers (2)

Matthias Hild
Matthias Hild

Reputation: 1

Instantiate a FileBasedConfigurationBuilder using the JSONConfiguration class (version >= 2.2):

Configurations configs = new Configurations();

FileBasedConfigurationBuilder<JSONConfiguration> builder =
    configs.fileBasedBuilder(JSONConfiguration.class, file);

Unfortunately, I have not found a way to get JSONConfiguration to pretty print. Overriding the class is not an option as it uses of private fields. It is simple, however, to supply your own class (copy JSONConfiguration) and modify the write method:

@Override
public void write(final Writer out) throws ConfigurationException, IOException {

    this.mapper.writerWithDefaultPrettyPrinter().writeValue(out,
        constructMap(this.getNodeModel().getNodeHandler().getRootNode()));

}

Upvotes: 0

Evvo
Evvo

Reputation: 499

I'd much rather use JSON than XML, but short of writing my own JSON shim for the library, I don't see any 'built in' solution.

Upvotes: 1

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