A new year, a new preview! In this preview the item holder rules were split into their own data component with a minor change to the rules themselves.

Changes

Item Behaviour Components

minecraft:item_holder

• Rules are now modifiable for indivial item stacks with the minecraft:item_holder_rules data component instead of being part of minecraft:bundle_contents.
• All item holders now use the same default minecraft:bundle_contents data component again.

Data Components

• Added the following data components:
  • minecraft:item_holder_rules

minecraft:bundle_contents

• Reverted the component to its previous form by moving the rules to their own data component.

minecraft:item_holder_rules

• Specified and used by the minecraft:item_holder behaviour component.
• If removed, the item holder behaviour will no longer work.
• Its value is a list of item holder rules.

Example:

[
  {
    "type": "minecraft:reject",
    "condition": {
      "items": "#minecraft:banned_bundle_items"
    }
  },
  {
    "type": "minecraft:occupancy_held_items_with_penalty",
    "condition": {
      "behavior": [
        "minecraft:item_holder"
      ]
    },
    "penalty": {
      "denominator": 16,
      "numerator": 1
    }
  },
  {
    "type": "minecraft:fraction",
    "condition": {
      "data_components": [
        "minecraft:bees"
      ]
    },
    "fraction": {
      "denominator": 1,
      "numerator": 1
    }
  }
]

Item Holder Rules

• Renamed the minecraft:fraction_with_occupancy_held_items type to minecraft:occupancy_held_items_with_penalty.
  • The fraction field was also renamed to penalty to show the use of the field more.

So if you had this:

{
  "type": "minecraft:fraction_with_occupancy_held_items",
  "fraction": {
    "denominator": 16,
    "numerator": 1
  }
}

You now have to use this instead:

{
  "type": "minecraft:occupancy_held_items_with_penalty",
  "penalty": {
    "denominator": 16,
    "numerator": 1
  }
}

Fixes

• Updating the item holder rules retains the old rules on item stacks that already have contents (#54)