Paper/paper-api/src/main/java/org/bukkit/Statistic.java

package org.bukkit;

/**
 * Represents a countable statistic, which is tracked by the server.
 */
public enum Statistic {
    DAMAGE_DEALT,
    DAMAGE_TAKEN,
    DEATHS,
    MOB_KILLS,
    PLAYER_KILLS,
    FISH_CAUGHT,
    ANIMALS_BRED,
    TREASURE_FISHED,
    JUNK_FISHED,
    LEAVE_GAME,
    JUMP,
    DROP,
    PLAY_ONE_TICK,
    WALK_ONE_CM,
    SWIM_ONE_CM,
    FALL_ONE_CM,
    CLIMB_ONE_CM,
    FLY_ONE_CM,
    DIVE_ONE_CM,
    MINECART_ONE_CM,
    BOAT_ONE_CM,
    PIG_ONE_CM,
    HORSE_ONE_CM,
    MINE_BLOCK(Type.BLOCK),
    USE_ITEM(Type.ITEM),
    BREAK_ITEM(Type.ITEM),
    CRAFT_ITEM(Type.ITEM),
    KILL_ENTITY(Type.ENTITY),
    ENTITY_KILLED_BY(Type.ENTITY);

    private final Type type;

    private Statistic() {
        this(Type.UNTYPED);
    }

    private Statistic(Type type) {
        this.type = type;
    }

    /**
     * Gets the type of this statistic.
     *
     * @return the type of this statistic
     */
    public Type getType() {
        return type;
    }

    /**
     * Checks if this is a substatistic.
     * <p>
     * A substatistic exists en masse for each block, item, or entitytype, depending on
     * {@link #getType()}.
     * <p>
     * This is a redundant method and equivalent to checking
     * <code>getType() != Type.UNTYPED</code>
     *
     * @return true if this is a substatistic
     */
    public boolean isSubstatistic() {
        return type != Type.UNTYPED;
    }

    /**
     * Checks if this is a substatistic dealing with blocks.
     * <p>
     * This is a redundant method and equivalent to checking
     * <code>getType() == Type.BLOCK</code>
     *
     * @return true if this deals with blocks
     */
    public boolean isBlock() {
        return type == Type.BLOCK;
    }

    /**
     * The type of statistic.
     *
     */
    public enum Type {
        /**
         * Statistics of this type do not require a qualifier.
         */
        UNTYPED,

        /**
         * Statistics of this type require an Item Material qualifier.
         */
        ITEM,

        /**
         * Statistics of this type require a Block Material qualifier.
         */
        BLOCK,

        /**
         * Statistics of this type require an EntityType qualifier.
         */
        ENTITY;
    }
}