Saving an object that contains other object arrays.

[turbid cedar]

Wondering how I could go about doing this, for simple data persistence. Doesn't have to have great performance.

The object I'm trying to save has the following:

Month[] months = new Month[12];

Inside each month, is

Day[] days;

and inside each day is

Meal[] meals = new Meals[99];

[vital briar]

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[sacred veldt]

uhm, you just.. do just that?

not sure what the issue is

[turbid cedar]

Never done it before ahahahahah

Just need some guidance

Can't find what I'm looking for online, kinda late so my mind isn't working well

[sacred veldt]

do you know how to write classes

[turbid cedar]

Yes?

[sacred veldt]

then you know how to solve this problem

start with the meal class

write a day class that has that

[turbid cedar]

Huh?

[sacred veldt]

write a month class that has that

[turbid cedar]

I'm wondering about data persistence

lol

[sacred veldt]

oh shit misread your question horribly lmao

that's what i get for skimming

[turbid cedar]

dw

happens

[sacred veldt]

sorry, don't know about db stuff in java

[turbid cedar]

npnp

[dense loom]

you could just like

dump it to json or something

basically find a way to searlize it

and then store the string in the db

[runic nest]

do you want to use ORM tool, or save the data manually?

[turbid cedar]

I'd rather save it manually

[turbid cedar]

How would I serialize an array of objects that contain an array of objects in a way that i could load it back in? I'm stuck on that 🤣

[runic nest]

if you want to do it really easy and really stupid:

• create a table with a singe blob field
• serialize the months object (make sure that Month, Day, Meal classes implement Serializable interface) into a byte array
• put that data into table
  if you want to do it right, you will need:
• create table months with fields that correspond to the fields of Month class (and id field to store identifier) and you store each of the month
• create table days with fields that correspond to the fields of Day class (and id field to store identifier and month_id to store relation) and store
• create table meals with fields that correspond to the fields of Meal class (and id field to store identifier and day_id to store relation to day)