Let ItemsAdder be a new OneBlockCustomBlock

src/main/java/world/bentobox/aoneblock/AOneBlock.java

@@ -24,7 +24,9 @@
 import world.bentobox.aoneblock.listeners.ItemsAdderListener;
 import world.bentobox.aoneblock.listeners.JoinLeaveListener;
 import world.bentobox.aoneblock.listeners.NoBlockHandler;
+import world.bentobox.aoneblock.oneblocks.OneBlockCustomBlockCreator;
 import world.bentobox.aoneblock.oneblocks.OneBlocksManager;
+import world.bentobox.aoneblock.oneblocks.customblock.ItemsAdderCustomBlock;
 import world.bentobox.aoneblock.requests.IslandStatsHandler;
 import world.bentobox.aoneblock.requests.LocationStatsHandler;
 import world.bentobox.bentobox.api.addons.GameModeAddon;
@@ -57,6 +59,8 @@ public void onLoad() {
 		// Check if ItemsAdder exists, if yes register listener
 		if (Bukkit.getPluginManager().getPlugin("ItemsAdder") != null) {
 			registerListener(new ItemsAdderListener(this));
+			OneBlockCustomBlockCreator.register(ItemsAdderCustomBlock::fromId);
+			OneBlockCustomBlockCreator.register("itemsadder", ItemsAdderCustomBlock::fromMap);
 			hasItemsAdder = true;
 		}
 		// Save the default config from config.yml

src/main/java/world/bentobox/aoneblock/listeners/BlockListener.java

@@ -41,7 +41,6 @@
 import org.eclipse.jdt.annotation.NonNull;
 import org.eclipse.jdt.annotation.Nullable;
 
-import dev.lone.itemsadder.api.CustomBlock;
 import world.bentobox.aoneblock.AOneBlock;
 import world.bentobox.aoneblock.dataobjects.OneBlockIslands;
 import world.bentobox.aoneblock.events.MagicBlockEntityEvent;
@@ -435,13 +434,6 @@ private void breakBlock(@Nullable Player player, Block block, @NonNull OneBlockO
     private void spawnBlock(@NonNull OneBlockObject nextBlock, @NonNull Block block) {
 	if (nextBlock.isCustomBlock()) {
 	    nextBlock.getCustomBlock().execute(addon, block);
-	} else if (nextBlock.isItemsAdderBlock()) {
-	    // Get Custom Block from ItemsAdder and place it
-	    CustomBlock cBlock = CustomBlock.getInstance(nextBlock.getItemsAdderBlock());
-	    if (cBlock != null) {
-		block.getLocation().getBlock().setType(Material.AIR);
-		cBlock.place(block.getLocation());
-	    }
 	} else {
 	    @NonNull
 	    Material type = nextBlock.getMaterial();

src/main/java/world/bentobox/aoneblock/oneblocks/OneBlockObject.java

@@ -42,7 +42,6 @@ public enum Rarity {
     private Map<Integer, ItemStack> chest;
     private Rarity rarity;
     private OneBlockCustomBlock customBlock;
-    private String itemsAdderBlock;
     private int prob;
 
     /**
@@ -78,18 +77,6 @@ public OneBlockObject(OneBlockCustomBlock customBlock, int prob) {
         this.prob = prob;
     }
 
-    /**
-     * An ItemsAdder block
-     *
-     * @param namedSpaceID - ItemsAdder block
-     * @param prob        - relative probability
-     */
-
-    public OneBlockObject(String namedSpaceID, int prob) {
-        this.itemsAdderBlock = namedSpaceID;
-        this.prob = prob;
-    }
-
     /**
      * A chest
      *
@@ -113,7 +100,6 @@ public OneBlockObject(OneBlockObject ob) {
         this.rarity = ob.getRarity();
         this.prob = ob.getProb();
         this.customBlock = ob.getCustomBlock();
-        this.itemsAdderBlock = ob.getItemsAdderBlock();
     }
 
     /**
@@ -147,11 +133,6 @@ public OneBlockCustomBlock getCustomBlock() {
         return customBlock;
     }
 
-    /**
-     * @return the itemsAdderBlock
-     */
-    public String getItemsAdderBlock() { return itemsAdderBlock; }
-
 
     /**
      * @return the isMaterial
@@ -176,13 +157,6 @@ public boolean isCustomBlock() {
         return customBlock != null;
     }
 
-    /**
-     * @return the isItemsAdderBlock
-     */
-    public boolean isItemsAdderBlock() {
-        return itemsAdderBlock != null;
-    }
-
     /**
      * @return the rarity
      */

src/main/java/world/bentobox/aoneblock/oneblocks/OneBlockPhase.java

@@ -165,17 +165,6 @@ public void addCustomBlock(OneBlockCustomBlock customBlock, int prob) {
         probMap.put(total, new OneBlockObject(customBlock, prob));
     }
 
-    /**
-     * Adds a ItemsAdder's custom block and associated probability
-     * @param namedSpaceID - name space and ID
-     * @param prob        - probability
-     */
-    public void addItemsAdderCustomBlock(String namedSpaceID, int prob) {
-        total += prob;
-        blockTotal += prob;
-        probMap.put(total, new OneBlockObject(namedSpaceID, prob));
-    }
-
     /**
      * Adds an entity type and associated probability
      *

src/main/java/world/bentobox/aoneblock/oneblocks/OneBlocksManager.java

@@ -31,8 +31,6 @@
 import com.google.common.base.Enums;
 import com.google.common.io.Files;
 
-import dev.lone.itemsadder.api.CustomBlock;
-import dev.lone.itemsadder.api.ItemsAdder;
 import world.bentobox.aoneblock.AOneBlock;
 import world.bentobox.aoneblock.dataobjects.OneBlockIslands;
 import world.bentobox.aoneblock.oneblocks.OneBlockObject.Rarity;
@@ -489,22 +487,7 @@ void addBlocks(OneBlockPhase obPhase, ConfigurationSection phase) {
 	if (phase.isConfigurationSection(BLOCKS)) {
 	    ConfigurationSection blocks = phase.getConfigurationSection(BLOCKS);
 	    for (String material : blocks.getKeys(false)) {
-		if (Material.getMaterial(material) != null) {
-		    addMaterial(obPhase, material, Objects.toString(blocks.get(material)));
-		} else {
-		    if (addon.hasItemsAdder()) {
-			CustomBlock block = CustomBlock.getInstance(material);
-			if (block != null) {
-			    addItemsAdderBlock(obPhase, material, Objects.toString(blocks.get(material)));
-			} else if (ItemsAdder.getAllItems() != null) {
-			    if (ItemsAdder.getAllItems().size() != 0) {
-				addon.logError("Bad block material in " + obPhase.getPhaseName() + ": " + material);
-			    }
-			}
-		    } else {
-			addon.logError("Bad block material in " + obPhase.getPhaseName() + ": " + material);
-		    }
-		}
+			addMaterial(obPhase, material, Objects.toString(blocks.get(material)));
 	    }
 	} else if (phase.isList(BLOCKS)) {
 	    List<Map<?, ?>> blocks = phase.getMapList(BLOCKS);
@@ -559,22 +542,6 @@ private boolean addMaterial(OneBlockPhase obPhase, String material, String proba
 	return true;
     }
 
-    private void addItemsAdderBlock(OneBlockPhase obPhase, String block, String probability) {
-	int prob;
-	try {
-	    prob = Integer.parseInt(probability);
-	    if (prob < 1) {
-		addon.logWarning("Bad item weight for " + obPhase.getPhaseName() + ": " + block
-			+ ". Must be positive number above 1.");
-	    } else {
-		obPhase.addItemsAdderCustomBlock(block, prob);
-	    }
-	} catch (Exception e) {
-	    addon.logError("Bad item weight for " + obPhase.getPhaseName() + ": " + block + ". Must be a number.");
-	}
-
-    }
-
     /**
      * Return the current phase for the block count
      *

src/main/java/world/bentobox/aoneblock/oneblocks/customblock/BlockDataCustomBlock.java

@@ -1,16 +1,15 @@
 package world.bentobox.aoneblock.oneblocks.customblock;
 
-import java.util.Map;
-import java.util.Objects;
-import java.util.Optional;
-
 import org.bukkit.Bukkit;
 import org.bukkit.block.Block;
-
 import world.bentobox.aoneblock.AOneBlock;
 import world.bentobox.aoneblock.oneblocks.OneBlockCustomBlock;
 import world.bentobox.bentobox.BentoBox;
 
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+
 /**
  * A custom block that is defined by a block data value.
  *

src/main/java/world/bentobox/aoneblock/oneblocks/customblock/ItemsAdderCustomBlock.java

@@ -0,0 +1,41 @@
+package world.bentobox.aoneblock.oneblocks.customblock;
+
+import dev.lone.itemsadder.api.CustomBlock;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import world.bentobox.aoneblock.AOneBlock;
+import world.bentobox.aoneblock.oneblocks.OneBlockCustomBlock;
+import world.bentobox.bentobox.BentoBox;
+
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+
+public class ItemsAdderCustomBlock implements OneBlockCustomBlock {
+    private final CustomBlock customBlock;
+
+    public ItemsAdderCustomBlock(CustomBlock customBlock) {
+        this.customBlock = customBlock;
+    }
+
+    public static Optional<ItemsAdderCustomBlock> fromId(String id) {
+        return Optional.ofNullable(CustomBlock.getInstance(id)).map(ItemsAdderCustomBlock::new);
+    }
+
+    public static Optional<ItemsAdderCustomBlock> fromMap(Map<?, ?> map) {
+        return Optional
+                .ofNullable(Objects.toString(map.get("id"), null))
+                .flatMap(ItemsAdderCustomBlock::fromId);
+    }
+
+    @Override
+    public void execute(AOneBlock addon, Block block) {
+        try {
+            block.setType(Material.AIR);
+            customBlock.place(block.getLocation());
+        } catch (Exception e) {
+            BentoBox.getInstance().logError("Could not place custom block " + customBlock.getId() + " for block " + block.getType());
+            block.setType(Material.STONE);
+        }
+    }
+}

src/main/java/world/bentobox/aoneblock/oneblocks/customblock/MobCustomBlock.java

@@ -42,7 +42,7 @@ public static Optional<MobCustomBlock> fromMap(Map<?, ?> map) {
         EntityType entityType = maybeEntity(entityTypeValue);
         Material underlyingBlock = Material.getMaterial(underlyingBlockValue);
 
-        if(underlyingBlock == null){
+        if (underlyingBlock == null) {
             BentoBox.getInstance().logWarning("Underlying block " + underlyingBlockValue + " does not exist and will be replaced with STONE.");
         }