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Use Preconditions in API

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This commit is contained in:
filoghost 2020-07-05 12:30:37 +02:00
parent 7241a39a91
commit 4040e60307
1 changed files with 5 additions and 3 deletions
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8
API/src/main/java/me/filoghost/chestcommands/api/internal/BackendAPI.java
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@ -17,6 +17,7 @@ package me.filoghost.chestcommands.api.internal;
import me.filoghost.chestcommands.api.ConfigurableIcon;
import me.filoghost.chestcommands.api.IconMenu;
import me.filoghost.chestcommands.api.StaticIcon;
import me.filoghost.chestcommands.util.Preconditions;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
@ -27,13 +28,14 @@ public abstract class BackendAPI {
private static BackendAPI implementation;
public static void setImplementation(BackendAPI implementation) {
Preconditions.notNull(implementation, "implementation");
Preconditions.checkState(implementation == null, "implementation already set");
BackendAPI.implementation = implementation;
}
public static BackendAPI getImplementation() {
if (implementation == null) {
throw new IllegalStateException("no implementation set");
}
Preconditions.checkState(implementation != null, "no implementation set");
return implementation;
}