Add recipe classes and an addRecipe method in the server interface.

src/main/java/org/bukkit/inventory/ShapelessRecipe.java

@@ -0,0 +1,122 @@
+package org.bukkit.inventory;
+
+import java.util.ArrayList;
+
+import org.bukkit.Material;
+import org.bukkit.material.MaterialData;
+
+/**
+ * Represents a shapeless recipe, where the arrangement of the ingredients on the crafting grid
+ * does not matter.
+ */
+public class ShapelessRecipe implements Recipe {
+    private ItemStack output;
+    private ArrayList<MaterialData> ingredients = new ArrayList<MaterialData>();
+
+    /**
+     * Create a shapeless recipe to craft the specified ItemStack. The constructor merely determines the
+     * result and type; to set the actual recipe, you'll need to call the appropriate methods.
+     * @param result The item you want the recipe to create.
+     * @see ShapelessRecipe#addIngredient(Material)
+     * @see ShapelessRecipe#addIngredient(MaterialData)
+     */
+    public ShapelessRecipe(ItemStack result) {
+        this.output = result;
+    }
+
+    /**
+     * Adds the specified ingredient.
+     * @param ingredient The ingredient to add.
+     * @return The changed recipe, so you can chain calls.
+     */
+    public ShapelessRecipe addIngredient(MaterialData ingredient) {
+        return addIngredient(1, ingredient);
+    }
+
+    /**
+     * Adds the specified ingredient.
+     * @param ingredient The ingredient to add.
+     * @return The changed recipe, so you can chain calls.
+     */
+    public ShapelessRecipe addIngredient(Material ingredient) {
+        return addIngredient(1, ingredient, 0);
+    }
+
+    /**
+     * Adds the specified ingredient.
+     * @param ingredient The ingredient to add.
+     * @param rawdata The data value.
+     * @return The changed recipe, so you can chain calls.
+     */
+    public ShapelessRecipe addIngredient(Material ingredient, int rawdata) {
+        return addIngredient(1, ingredient, rawdata);
+    }
+
+    /**
+     * Adds multiples of the specified ingredient.
+     * @param count How many to add (can't be more than 9!)
+     * @param ingredient The ingredient to add.
+     * @return The changed recipe, so you can chain calls.
+     */
+    public ShapelessRecipe addIngredient(int count, MaterialData ingredient) {
+        if (ingredients.size() + count > 9) {
+            throw new IllegalArgumentException("Shapeless recipes cannot have more than 9 ingredients");
+        }
+        while (count-- > 0) {
+            ingredients.add(ingredient);
+        }
+        return this;
+    }
+
+    /**
+     * Adds multiples of the specified ingredient.
+     * @param count How many to add (can't be more than 9!)
+     * @param ingredient The ingredient to add.
+     * @return The changed recipe, so you can chain calls.
+     */
+    public ShapelessRecipe addIngredient(int count, Material ingredient) {
+        return addIngredient(count, ingredient, 0);
+    }
+
+    /**
+     * Adds multiples of the specified ingredient.
+     * @param count How many to add (can't be more than 9!)
+     * @param ingredient The ingredient to add.
+     * @param rawdata The data value.
+     * @return The changed recipe, so you can chain calls.
+     */
+    public ShapelessRecipe addIngredient(int count, Material ingredient, int rawdata) {
+        MaterialData data = ingredient.getNewData((byte) rawdata);
+        if (data == null) {
+            data = new MaterialData(ingredient, (byte) rawdata);
+        }
+        return addIngredient(count, data);
+    }
+
+    /**
+     * Removes an ingredient from the list. If the ingredient occurs multiple times,
+     * only one instance of it is removed.
+     * @param ingredient The ingredient to remove
+     * @return The changed recipe.
+     */
+    public ShapelessRecipe removeIngredient(MaterialData ingredient) {
+        this.ingredients.remove(ingredient);
+        return this;
+    }
+
+    /**
+     * Get the result of this recipe.
+     * @return The result stack.
+     */
+    public ItemStack getResult() {
+        return output;
+    }
+
+    /**
+     * Get the list of ingredients used for this recipe.
+     * @return The input list
+     */
+    public ArrayList<MaterialData> getIngredientList() {
+        return ingredients;
+    }
+}