What path to use in Java for YAML arrays with multiple objects?-CodePudding

I am currently trying to figure out how to get a String from my config.yml into my Java code. More specifically, which path to use to get "Home", "X:-1 Y:79 Z:3", "Nether" or "X:23 Y:65 Z:-19" extracted into my Java code. I already tried getConfig().getString("Streuzel[0].name"), but that didn't work.

YAML: (Array with multiple objects)

Streuzel:
    -
        name: Home
        coords: X:-1 Y:79 Z:3
    -
        name: Nether
        coords: X:23 Y:65 Z:-19

Java:

Bukkit.broadcastMessage(ChatColor.YELLOW   getConfig().getString("path?")   ChatColor.WHITE   ", "   ChatColor.GREEN   getConfig().getString("path?"));

CodePudding user response：

Actually, Streuzel is a List, not an array, so you need to use getList(String) instead of getString(String). In your case, each element of this list is a Map<String, String>. So, if you don't care about type cast safety (because yaml can be edited by humans and it potentially can lose structure), you can use something like this:

((Map<String, String>)config.getList("Streuzel").get(0)).get("name") // Home

But ideally, you could either check if "Streuzel" is a list and if it contains a Map, or try...catch ClassCastException.

~~About an answer that got posted 3 minutes ago: Streuzel is a List, not a Map!~~
EDIT: they fixed it

CodePudding user response：

If you really want to get as list, you can use getConfig().getList("Streuzel") that will return a list of LinkedHashMap<>. You can use it like that:

LinkedHashMap<String, Object> myObj = (LinkedHashMap<String, Object>) getConfig().getList("Streuzel").get(0);
Bukkit.broadcastMessage(ChatColor.YELLOW   myObj.get("name")   ChatColor.WHITE   ", "   ChatColor.GREEN   myObj.get("coords"));

But, this is not recommended. It's better to use configuration section like that:

Streuzel:
    1:
        name: Home
        coords: X:-1 Y:79 Z:3
    2:
        name: Nether
        coords: X:23 Y:65 Z:-19

Then, you can use them like that:

Bukkit.broadcastMessage(ChatColor.YELLOW   getConfig().getString("Streuzel.1.name")   ChatColor.WHITE   ", "   ChatColor.GREEN   getConfig().getString("Streuzel.1.coords"));

This way, with section, make it so much easier to get all content. If you want to find all sections, do like that:

// here is the config with all keys
ConfigurationSection globalSection = getConfig().getConfigurationSection("Streuzel");
for(String keys : globalSection.getKeys(false)) { // all kays: "1", "2" ...
   ConfigurationSection objSection = globalSection.getConfigurationSection(keys);
   // here you can load your object, log it or get content with objSection.getString()
}