import com.google.gson.JsonArray
import com.google.gson.JsonObject

/**
 * This script will print a JSON array of all namespaces on current AEM instance
 * Each JSON object in the array will be of the format:
 * {"prefix":"The namespace prefix", "uri":"The namespace uri"}
 *
 */



def reg = session.getWorkspace().getNamespaceRegistry();

def jsonArray = new JsonArray()
reg.getPrefixes().each { prefix ->
   def uri = reg.getURI(prefix)
   def json = new JsonObject()
   json.addProperty("prefix", prefix)
   json.addProperty("uri", uri)
   jsonArray.add(json)
}
print jsonArray.toString()