Grails JSON array

Question

I\'m converting a list of Foo objects to a JSON string. I need to parse the JSON string back into a list of Foos. However in the following example, parsing gives me a list of JS

Answer 1

I've taken this code and extended it to work with nested structures. It relies on a 'class' attribute existing in the JSON. If there's a better way by now in Grails please let me know.

     // The default JSON parser just creates generic JSON objects.  If there are nested

    // JSON arrays they are not converted to theirs types but are left as JSON objects
    // This converts nested JSON structures into their types.
    // IT RELIES ON A PROPERTY 'class' that must exist in the JSON tags
    JSON.metaClass.static.parseJSONToTyped = {def jsonObjects ->

        def typedObjects = jsonObjects.collect {JSONObject jsonObject ->
            if(!jsonObject.has("class")){
                throw new Exception("JSON parsing failed due to the 'class' attribute missing: " + jsonObject)
            }

            def targetClass = grailsApplication.classLoader.loadClass(jsonObject.get("class"))
            def targetInstance = targetClass.newInstance()

            // Set the properties of targetInstance
            jsonObject.entrySet().each {entry ->
                // If the entry is an array then recurse
                if(entry.value instanceof org.codehaus.groovy.grails.web.json.JSONArray){
                    def typedSubObjects = parseJSONToTyped(entry.value)
                    targetInstance."$entry.key" = typedSubObjects
                }
                else if (entry.key != "class") {
                    targetInstance."$entry.key" = entry.value
                }
            }

            targetInstance
        }

        return typedObjects
    }