Trait ItemsHost 

pub trait ItemsHost {
    // Provided methods
    fn max_stack_size(&self, item: ItemKey) -> Option<u32> { ... }
    fn max_damage(&self, item: ItemKey) -> Option<u32> { ... }
    fn item_key(&self, id: &Identifier) -> Option<ItemKey> { ... }
    fn item_default_component(
        &self,
        item: ItemKey,
        component: &str,
    ) -> Option<Tag> { ... }
    fn item_burn_time(&self, item: ItemKey) -> Option<i32> { ... }
    fn item_compost_chance(&self, item: ItemKey) -> Option<f32> { ... }
    fn enchantments_compatible(&self, a: &str, b: &str) -> bool { ... }
    fn entity_type_in_tag(&self, entity_type: &str, tag: &str) -> bool { ... }
}

The host’s methods both sides share of the items area, implemented by the game and reached through Host.

Provided Methods

fn max_stack_size(&self, item: ItemKey) -> Option<u32>

Side: both. The most of the item item one slot holds (Item.getDefaultMaxStackSize), or None for an unknown item: for a mod’s container that fills or merges stacks itself.

fn max_damage(&self, item: ItemKey) -> Option<u32>

Side: both. Default durability of the resolved item, or none if its metadata is unavailable. Stack-specific component overrides are checked at the game’s write boundary.

fn item_key(&self, id: &Identifier) -> Option<ItemKey>

Side: both. Resolve an item once at load, including vanilla items, to its process-local identity. None if the completed registry does not contain the identifier.

fn item_default_component(&self, item: ItemKey, component: &str) -> Option<Tag>

Side: both. Item item‘s default value of component component, in its prototype (Item.components().get): minecraft:max_damage on an iron sword is 250, data packs’ and native mods’ changes included. Read from the item report’s JSON, so a number is an Int, Long or Double and a boolean a Byte. None where the item hasn’t the component, and for an unknown item.

fn item_burn_time(&self, item: ItemKey) -> Option<i32>

Side: both. Item item’s cooking-fuel burn time in ticks (FuelValues.burnDuration of its cooking_fuel component, the data pack’s context int provider resolved), None where it is no fuel. API @API:item_components@.

fn item_compost_chance(&self, item: ItemKey) -> Option<f32>

Side: both. Item item’s chance to raise a composter’s level (its compostable component’s layers provider resolved), None where it is not compostable. API @API:item_components@.

fn enchantments_compatible(&self, a: &str, b: &str) -> bool

Side: both. Whether enchantments a and b may share an item (Enchantment.areCompatible), by the world’s enchantment definitions. API @API:item_components@.

fn entity_type_in_tag(&self, entity_type: &str, tag: &str) -> bool

Side: both. EntityType.is(TagKey): whether entity_type (minecraft:player) is in the entity type tag tag (minecraft:cannot_be_pushed_onto_boats).

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors