/**
 * 
 */
package org.gcube.informationsystem.utils;

import java.io.IOException;
import java.util.UUID;

import org.gcube.com.fasterxml.jackson.core.JsonProcessingException;
import org.gcube.com.fasterxml.jackson.databind.JsonNode;
import org.gcube.com.fasterxml.jackson.databind.ObjectMapper;
import org.gcube.informationsystem.base.reference.IdentifiableElement;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Luca Frosini (ISTI - CNR)
 */
public class Utility {

	private static Logger logger = LoggerFactory.getLogger(Utility.class);
	
	public static UUID getUUIDFromJsonNode(JsonNode jsonNode){
		UUID uuid = UUID.fromString(jsonNode.get(IdentifiableElement.UUID_PROPERTY).asText());
		logger.trace("UUID got from {} is : {} ", jsonNode.toString(), uuid);
		return uuid;
	}
	
	public static UUID getUUIDFromJSONString(String json) throws JsonProcessingException, IOException {
		logger.trace("Trying to get UUID of {} ", json);
		JsonNode jsonNode = getJSONNode(json);
		return getUUIDFromJsonNode(jsonNode);
	}
	
	public static JsonNode getJSONNode(String json) throws JsonProcessingException, IOException {
		if(json==null || json.compareTo("")==0){
			return null;
		}
		logger.trace("Trying to get Jsonnode from {}", json);
		ObjectMapper mapper = new ObjectMapper();
		JsonNode jsonNode = mapper.readTree(json);
		return jsonNode;
	}
	
}