1.21 Support

build.gradle

@@ -29,7 +29,7 @@ dependencies {
 	shadow group: 'org.bstats', name: 'bstats-bukkit', version: '3.0.2'
 	shadow group: 'net.kyori', name: 'adventure-text-serializer-bungeecord', version: '4.3.2'
 
-	implementation group: 'io.papermc.paper', name: 'paper-api', version: '1.20.6-R0.1-SNAPSHOT'
+	implementation group: 'io.papermc.paper', name: 'paper-api', version: '1.21-R0.1-SNAPSHOT'
 	implementation group: 'org.eclipse.jdt', name: 'org.eclipse.jdt.annotation', version: '2.2.700'
 	implementation group: 'com.google.code.findbugs', name: 'findbugs', version: '3.0.1'
 	implementation group: 'com.sk89q.worldguard', name: 'worldguard-legacy', version: '7.0.0-SNAPSHOT'
@@ -235,7 +235,7 @@ def java21 = 21
 def java17 = 17
 def java8 = 8
 
-def latestEnv = 'java21/paper-1.20.6.json'
+def latestEnv = 'java21/paper-1.21.0.json'
 def latestJava = java21
 def oldestJava = java8
 

gradle.properties

@@ -7,5 +7,5 @@ groupid=ch.njol
 name=skript
 version=2.8.7
 jarName=Skript.jar
-testEnv=java21/paper-1.20.6
+testEnv=java21/paper-1.21.0
 testEnvJavaVersion=21

src/main/java/ch/njol/skript/aliases/AliasesProvider.java

@@ -304,16 +304,19 @@ public void addAlias(AliasName name, String id, @Nullable Map<String, Object> ta
 			}
 
 			// Apply (NBT) tags to item stack
-			ItemStack stack = new ItemStack(material);
+			ItemStack stack = null;
 			int itemFlags = 0;
-			if (tags != null) {
-				itemFlags = applyTags(stack, new HashMap<>(tags));
+			if (material.isItem()) {
+				stack = new ItemStack(material);
+				if (tags != null) {
+					itemFlags = applyTags(stack, new HashMap<>(tags));
+				}
 			}
 
 			// Parse block state to block values
 			BlockValues blockValues = BlockCompat.INSTANCE.createBlockValues(material, blockStates, stack, itemFlags);
 
-			ItemData data = new ItemData(stack, blockValues);
+			ItemData data = stack != null ? new ItemData(stack, blockValues) : new ItemData(material, blockValues);
 			data.isAlias = true;
 			data.itemFlags = itemFlags;
 

src/main/java/ch/njol/skript/aliases/ItemData.java

@@ -37,7 +37,7 @@
 import org.bukkit.inventory.ItemFlag;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
-import org.eclipse.jdt.annotation.Nullable;
+import org.jetbrains.annotations.Nullable;
 
 import java.io.IOException;
 import java.io.NotSerializableException;
@@ -91,11 +91,6 @@ public static class OldItemData {
 	@Deprecated
 	public static final boolean itemDataValues = false;
 
-	/**
-	 * ItemStack, which is used for everything but serialization.
-	 */
-	transient ItemStack stack;
-
 	/**
 	 * Type of the item as Bukkit material. Serialized manually.
 	 */
@@ -105,14 +100,18 @@ public static class OldItemData {
 	 * If this represents all possible items.
 	 */
 	boolean isAnything;
-
+
+	/**
+	 * ItemStack, which is used for everything but serialization.
+	 */
+	transient @Nullable ItemStack stack;
+
 	/**
 	 * When this ItemData represents a block, this contains information to
 	 * allow comparing it against other blocks.
 	 */
-	@Nullable
-	BlockValues blockValues;
-
+	@Nullable BlockValues blockValues;
+
 	/**
 	 * Whether this represents an item (that definitely cannot have
 	 * block states) or a block, which might have them.
@@ -140,32 +139,39 @@ public static class OldItemData {
 
 	public ItemData(Material type, @Nullable String tags) {
 		this.type = type;
-
-		this.stack = new ItemStack(type);
-		this.blockValues = BlockCompat.INSTANCE.getBlockValues(stack);
+
+		if (type.isItem())
+			this.stack = new ItemStack(type);
+		this.blockValues = BlockCompat.INSTANCE.getBlockValues(type);
 		if (tags != null) {
 			applyTags(tags);
 		}
 	}
 
 	public ItemData(Material type, int amount) {
 		this.type = type;
-		this.stack = new ItemStack(type, Math.abs(amount));
-		this.blockValues = BlockCompat.INSTANCE.getBlockValues(stack);
+		if (type.isItem())
+			this.stack = new ItemStack(type, Math.abs(amount));
+		this.blockValues = BlockCompat.INSTANCE.getBlockValues(type);
 	}
 
 	public ItemData(Material type) {
 		this(type, 1);
 	}
 
 	public ItemData(ItemData data) {
-		this.stack = data.stack.clone();
+		this.stack = data.stack != null ? data.stack.clone() : null;
 		this.type = data.type;
 		this.blockValues = data.blockValues;
 		this.isAlias = data.isAlias;
 		this.plain = data.plain;
 		this.itemFlags = data.itemFlags;
 	}
+
+	public ItemData(Material material, @Nullable BlockValues values) {
+		this.type = material;
+		this.blockValues = values;
+	}
 
 	public ItemData(ItemStack stack, @Nullable BlockValues values) {
 		this.stack = stack;
@@ -200,7 +206,8 @@ public ItemData(BlockState blockState) {
 
 	public ItemData(BlockData blockData) {
 		this.type = blockData.getMaterial();
-		this.stack = new ItemStack(type);
+		if (type.isItem())
+			this.stack = new ItemStack(type);
 		this.blockValues = BlockCompat.INSTANCE.getBlockValues(blockData);
 	}
 
@@ -227,13 +234,12 @@ public boolean isOfType(@Nullable ItemStack item) {
 		if (type != item.getType())
 			return false; // Obvious mismatch
 
-		if (itemFlags != 0) { // Either stack has tags (or durability)
+		if (stack != null && itemFlags != 0) { // Either stack has tags (or durability)
 			if (ItemUtils.getDamage(stack) != ItemUtils.getDamage(item))
 				return false; // On 1.12 and below, damage is not in meta
 			if (stack.hasItemMeta() == item.hasItemMeta()) // Compare ItemMeta as in isSimilar() of ItemStack
-				return stack.hasItemMeta() ? itemFactory.equals(stack.getItemMeta(), item.getItemMeta()) : true;
-			else
-				return false;
+				return !stack.hasItemMeta() || itemFactory.equals(stack.getItemMeta(), item.getItemMeta());
+			return false;
 		}
 		return true;
 	}
@@ -249,7 +255,7 @@ public String toString() {
 
 	public String toString(final boolean debug, final boolean plural) {
 		StringBuilder builder = new StringBuilder(Aliases.getMaterialName(this, plural));
-		ItemMeta meta = stack.getItemMeta();
+		ItemMeta meta = stack != null ? stack.getItemMeta() : null;
 		if (meta != null && meta.hasDisplayName()) {
 			builder.append(" ").append(m_named).append(" ");
 			builder.append(meta.getDisplayName());
@@ -282,7 +288,7 @@ public boolean equals(final @Nullable Object obj) {
 	@Override
 	public int hashCode() {
 		int hash = type.hashCode(); // Has collisions, but probably not too many of them
-		if (blockValues == null || (blockValues != null && blockValues.isDefault())) {
+		if (blockValues == null || blockValues.isDefault()) {
 			hash = hash * 37 + 1;
 		}
 		return hash;
@@ -351,7 +357,7 @@ public MatchQuality matchAlias(ItemData item) {
 		}
 
 		// See if we need to compare item metas (excluding durability)
-		if (quality.isAtLeast(MatchQuality.SAME_ITEM) && stack.hasItemMeta() || item.stack.hasItemMeta()) { // Item meta checks could lower this
+		if (quality.isAtLeast(MatchQuality.SAME_ITEM) && this.hasItemMeta() || item.hasItemMeta()) { // Item meta checks could lower this
 			MatchQuality metaQuality = compareItemMetas(getItemMeta(), item.getItemMeta());
 
 			// If given item doesn't care about meta, promote to SAME_ITEM
@@ -489,9 +495,13 @@ public ItemData intersection(final ItemData other) {
 	 * It is not a copy, so please be careful.
 	 * @return Item stack.
 	 */
-	public ItemStack getStack() {
+	public @Nullable ItemStack getStack() {
 		return stack;
 	}
+
+	private boolean hasItemMeta() {
+		return stack != null && stack.hasItemMeta();
+	}
 
 	@Override
 	public ItemData clone() {
@@ -508,7 +518,7 @@ public BlockValues getBlockValues() {
 	}
 
 	public ItemMeta getItemMeta() {
-		ItemMeta meta = stack.getItemMeta();
+		ItemMeta meta = stack != null ? stack.getItemMeta() : null;
 		if (meta == null) { // AIR has null item meta!
 			meta = itemFactory.getItemMeta(Material.STONE);
 		}
@@ -517,17 +527,23 @@ public ItemMeta getItemMeta() {
 	}
 
 	public void setItemMeta(ItemMeta meta) {
+		if (stack == null)
+			return;
 		stack.setItemMeta(meta);
 		isAlias = false; // This is no longer exact alias
 		plain = false; // This is no longer a plain item
 		itemFlags |= ItemFlags.CHANGED_TAGS;
 	}
 
 	public int getDurability() {
+		if (stack == null)
+			return 0; // no damage?
 		return ItemUtils.getDamage(stack);
 	}
 
 	public void setDurability(int durability) {
+		if (stack == null)
+			return;
 		ItemUtils.setDamage(stack, durability);
 		isAlias = false; // Change happened
 		plain = false; // This is no longer a plain item
@@ -567,7 +583,7 @@ public boolean matchPlain(ItemData other) {
 	public Fields serialize() throws NotSerializableException {
 		Fields fields = new Fields(this); // ItemStack is transient, will be ignored
 		fields.putPrimitive("id", type.ordinal());
-		fields.putObject("meta", stack.getItemMeta());
+		fields.putObject("meta", stack != null ? stack.getItemMeta() : null);
 		return fields;
 	}
 
@@ -579,8 +595,10 @@ public void deserialize(Fields fields) throws StreamCorruptedException, NotSeria
 		ItemMeta meta = fields.getAndRemoveObject("meta", ItemMeta.class);
 
 		// Initialize ItemStack
-		this.stack = new ItemStack(type);
-		stack.setItemMeta(meta); // Just set meta to it
+		if (meta != null && type.isItem()) {
+			this.stack = new ItemStack(type);
+			stack.setItemMeta(meta); // Just set meta to it
+		}
 
 		fields.setFields(this); // Everything but ItemStack and Material
 	}
@@ -598,17 +616,17 @@ public void deserialize(Fields fields) throws StreamCorruptedException, NotSeria
 	 */
 	public ItemData aliasCopy() {
 		ItemData data = new ItemData();
-		data.stack = new ItemStack(type, 1);
-
-		if (stack.hasItemMeta()) {
-			ItemMeta meta = stack.getItemMeta(); // Creates a copy
-			meta.setDisplayName(null); // Clear display name
-			if (!itemFactory.getItemMeta(type).equals(meta)) // there may be different tags (e.g. potions)
-				data.itemFlags |= ItemFlags.CHANGED_TAGS;
-			data.stack.setItemMeta(meta);
+		if (stack != null) {
+			data.stack = new ItemStack(type, 1);
+			if (stack.hasItemMeta()) {
+				ItemMeta meta = stack.getItemMeta(); // Creates a copy
+				meta.setDisplayName(null); // Clear display name
+				if (!itemFactory.getItemMeta(type).equals(meta)) // there may be different tags (e.g. potions)
+					data.itemFlags |= ItemFlags.CHANGED_TAGS;
+				data.stack.setItemMeta(meta);
+			}
+			ItemUtils.setDamage(data.stack, 0); // Set to undamaged
 		}
-		ItemUtils.setDamage(data.stack, 0); // Set to undamaged
-
 		data.type = type;
 		data.blockValues = blockValues;
 		data.itemForm = itemForm;
@@ -620,6 +638,8 @@ public ItemData aliasCopy() {
 	 * @param tags Tags in Mojang's JSON format.
 	 */
 	public void applyTags(String tags) {
+		if (stack == null)
+			return;
 		BukkitUnsafe.modifyItemStack(stack, tags);
 		itemFlags |= ItemFlags.CHANGED_TAGS;
 	}

src/main/java/ch/njol/skript/aliases/ItemType.java

@@ -68,6 +68,7 @@
 import java.util.Random;
 import java.util.RandomAccess;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 @ContainerType(ItemStack.class)
 public class ItemType implements Unit, Iterable<ItemData>, Container<ItemStack>, YggdrasilExtendedSerializable {
@@ -315,7 +316,7 @@ public boolean isOfType(Material id, @Nullable String tags) {
 
 	public boolean isOfType(Material id) {
 		// TODO avoid object creation
-		return isOfType(new ItemData(id, null));
+		return isOfType(new ItemData(id, (String) null));
 	}
 
 	/**
@@ -343,7 +344,7 @@ public ItemType getBlock() {
 	 */
 	public boolean hasItem() {
 		for (ItemData d : types) {
-			if (!d.type.isBlock())
+			if (d.type.isItem())
 				return true;
 		}
 		return false;
@@ -487,9 +488,13 @@ public boolean hasNext() {
 
 			@Override
 			public ItemStack next() {
-				if (!hasNext())
-					throw new NoSuchElementException();
-				ItemStack is = iter.next().getStack().clone();
+				ItemStack is = null;
+				while (is == null) {
+					if (!hasNext())
+						throw new NoSuchElementException();
+					is = iter.next().getStack();
+				}
+				is = is.clone();
 				is.setAmount(getAmount());
 				return is;
 			}
@@ -588,10 +593,17 @@ public ItemType clone() {
 	 * @see #removeFrom(ItemStack)
 	 * @see #removeFrom(List...)
 	 */
-	public ItemStack getRandom() {
-		int numItems = types.size();
+	public @Nullable ItemStack getRandom() {
+		List<ItemData> datas = types.stream()
+				.filter(data -> data.stack != null)
+				.collect(Collectors.toList());
+		if (datas.isEmpty())
+			return null;
+		int numItems = datas.size();
 		int index = random.nextInt(numItems);
-		ItemStack is = types.get(index).getStack().clone();
+		ItemStack is = datas.get(index).getStack();
+		assert is != null; // verified above
+		is = is.clone();
 		is.setAmount(getAmount());
 		return is;
 	}
@@ -869,7 +881,9 @@ public final boolean removeFrom(boolean replaceWithNull, List<ItemStack>... list
 	 */
 	public void addTo(final List<ItemStack> list) {
 		if (!isAll()) {
-			list.add(getItem().getRandom());
+			ItemStack random = getItem().getRandom();
+			if (random != null)
+				list.add(getItem().getRandom());
 			return;
 		}
 		for (final ItemStack is : getItem().getAll())
@@ -936,7 +950,9 @@ private static boolean addTo(@Nullable ItemStack is, ItemStack[] buf) {
 
 	public boolean addTo(final ItemStack[] buf) {
 		if (!isAll()) {
-			return addTo(getItem().getRandom(), buf);
+			ItemStack random = getItem().getRandom();
+			if (random != null)
+				return addTo(getItem().getRandom(), buf);
 		}
 		boolean ok = true;
 		for (ItemStack is : getItem().getAll()) {

src/main/java/ch/njol/skript/bukkitutil/block/BlockCompat.java

@@ -65,6 +65,9 @@ default BlockValues getBlockValues(Block block) {
 		return getBlockValues(block.getBlockData());
 	}
 
+	@Nullable
+	BlockValues getBlockValues(Material material);
+
 	@Nullable
 	BlockValues getBlockValues(BlockData blockData);