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--- tutorial:mixin_injects [2022/03/08 19:00] – salvopelux
+++ tutorial:mixin_injects [2022/03/08 21:03] – remove interface injection from this incorrect place juuz
@@ Line 67: / Line 67: @@
 For more information on this particular example, view its usage in the [[https://github.com/FabricMC/fabric-example-mod/blob/master/src/main/java/net/fabricmc/example/mixin/ExampleMixin.java|Fabric Example Mod repo]].
-====== Inject an interface ======
-This is a new tecnique introduced by Loom 0.11 to add methods into a specific existing class.
-More specifically, you can create an Interface, and then inject this interface into the class.
-As result the target class will acquire all the methods of the interface, as if it always had them.
-Interface injection is a compile time only feature, this means that a Mixin should also be used to implement the interface into the target class.
-This is particulatly useful for libraries, with this you can add new methods to existing classes and use them without the need of casting or reimplementing the interface every time.
-Let's explain better with an example:
-The scope of this example is to add the following method into FlowableFluid to get the sound of the bucket when emptied.
-This, normally, is not possible because FlowableFluid does not has a similar method.
-<code java [enable_line_numbers="false"]>
-Optional<SoundEvent> getBucketEmptySound()
-</code>
-To add the method into the class, first of all you need to create an interface with it:
-<code java [enable_line_numbers="false"]>
-package net.fabricmc.example;
-public interface BucketEmptySoundGetter {
-	Optional<SoundEvent> getBucketEmptySound();
-}
-</code>
-Now you need to implement this interface into FlowableFluid with a mixin implementing the interface:
-<code java [enable_line_numbers="false"]>
-@Mixin(FlowableFluid.class)
-public class MixinFlowableFluid implements BucketEmptySoundGetter {
-	@Override
-	public Optional<SoundEvent> getBucketEmptySound() {
-		//This is how to get the default sound, copied from BucketItem class.
-		return Optional.of(((FlowableFluid) (Object) this).isIn(FluidTags.LAVA) ? SoundEvents.ITEM_BUCKET_EMPTY_LAVA : SoundEvents.ITEM_BUCKET_EMPTY);
-	}
-}
-</code>
-Lastly you need to inject the interface into FabricFluid.
-The following snippet can be added to your fabric.mod.json file to add one or more interfaces to the net/minecraft/fluid/FlowableFluid class.
-<code json [enable_line_numbers="false"]>
-{
-	"custom": {
-		"loom:injected_interfaces": {
-			"net/minecraft/class_3609": ["net/fabricmc/example/BucketEmptySoundGetter"]
-		}
-	}
-}
-</code>
-Now you can use the new method:
-<code java [enable_line_numbers="false"]>
-Optional<SoundEvent> sound = mytestfluid.getBucketEmptySound();
-</code>
-You could also override this method in classes extending FlowableFluid to implement custom behaviours.