package org.gcube.application.geoportal.service.utils;

import java.io.IOException;
import java.time.format.DateTimeFormatter;
import java.util.Collection;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;

public class Serialization {

	public static ObjectMapper mapper;
		
		static {
			mapper=new ObjectMapper();
			mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES,false);
			mapper.registerModule(new JavaTimeModule());
		}
		
		public static <T> T read(String jsonString,Class<T> clazz) throws JsonProcessingException, IOException {
			return mapper.readerFor(clazz).readValue(jsonString);
		}
		public static String write(Object toWrite) throws JsonProcessingException {
			return mapper.writeValueAsString(toWrite);
		}
		
		
		
		// As DB String 
		
		public static String asString(Collection<?> coll) {
			if(coll==null||coll.isEmpty()) return "";
			StringBuilder builder=new StringBuilder();
			for(Object t : coll) {
				builder.append(t.toString() +",");
			}
			return builder.substring(0, builder.lastIndexOf(","));
		}
		
		public static final DateTimeFormatter FULL_FORMATTER=DateTimeFormatter.ofPattern("uuuuMMdd_HH-mm-ss");
}