Added MaterialData

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/ItemStack.java

@@ -1,25 +1,27 @@
 
 package org.bukkit;
 
+import org.bukkit.material.MaterialData;
+
 /**
  * Represents a stack of items
  */
 public class ItemStack {
     private int type;
     private int amount = 0;
+    private MaterialData data = null;
     private byte damage = 0;
 
     public ItemStack(final int type) {
-        this.type = type;
+        this(type, 0);
     }
 
     public ItemStack(final Material type) {
-        this(type.getID());
+        this(type, 0);
     }
 
     public ItemStack(final int type, final int amount) {
-        this.type = type;
-        this.amount = amount;
+        this(type, amount, (byte) 0);
     }
 
     public ItemStack(final Material type, final int amount) {
@@ -27,15 +29,31 @@ public class ItemStack {
     }
 
     public ItemStack(final int type, final int amount, final byte damage) {
-        this.type = type;
-        this.amount = amount;
-        this.damage = damage;
+        this(type, amount, damage, (byte) 0);
     }
 
     public ItemStack(final Material type, final int amount, final byte damage) {
         this(type.getID(), amount, damage);
     }
 
+    public ItemStack(final int type, final int amount, final byte damage, final byte data) {
+        this.type = type;
+        this.amount = amount;
+        this.damage = damage;
+
+        Material mat = Material.getMaterial(type);
+
+        if (mat == null) {
+            this.data = new MaterialData(type, data);
+        } else {
+            this.data = mat.getNewData(data);
+        }
+    }
+
+    public ItemStack(final Material type, final int amount, final byte damage, final byte data) {
+        this(type.getID(), amount, damage, data);
+    }
+
     /**
      * Gets the type of this item
      *
@@ -46,7 +64,9 @@ public class ItemStack {
     }
 
     /**
-     * Sets the type of this item
+     * Sets the type of this item<br />
+     * <br />
+     * Note that in doing so you will reset the MaterialData for this stack
      *
      * @param type New type to set the items in this stack to
      */
@@ -64,12 +84,22 @@ public class ItemStack {
     }
 
     /**
-     * Sets the type ID of this item
+     * Sets the type ID of this item<br />
+     * <br />
+     * Note that in doing so you will reset the MaterialData for this stack
      *
      * @param type New type ID to set the items in this stack to
      */
     public void setTypeID(int type) {
         this.type = type;
+
+        Material mat = getType();
+
+        if (mat == null) {
+            data = new MaterialData(type, (byte)0);
+        } else {
+            data = mat.getNewData((byte)0);
+        }
     }
 
     /**
@@ -90,6 +120,35 @@ public class ItemStack {
         this.amount = amount;
     }
 
+    /**
+     * Gets the MaterialData for this stack of items
+     *
+     * @return MaterialData for this item
+     */
+    public MaterialData getData() {
+        return data;
+    }
+
+    /**
+     * Sets the MaterialData for this stack of items
+     *
+     * @param amount New MaterialData for this item
+     */
+    public void setData(MaterialData data) {
+        Material mat = getType();
+
+        if ((mat == null) || (mat.getData() == null)) {
+            this.data = data;
+        } else {
+            if ((data.getClass() == mat.getData()) || (data.getClass() == MaterialData.class)) {
+                this.data = data;
+            } else {
+                throw new IllegalArgumentException("Provided data is not of type "
+                        + mat.getData().getName() + ", found " + data.getClass().getName());
+            }
+        }
+    }
+
     /**
      * Sets the damage of this item<br /><br />
      *

paper-api/src/main/java/org/bukkit/material/MaterialData.java

@@ -0,0 +1,75 @@
+
+package org.bukkit.material;
+
+import org.bukkit.ItemStack;
+import org.bukkit.Material;
+
+/**
+ * Handles specific metadata for certain items or blocks
+ */
+public class MaterialData {
+    private final int type;
+    private byte data = 0;
+
+    public MaterialData(final int type) {
+        this(type, (byte)0);
+    }
+
+    public MaterialData(final Material type) {
+        this(type, (byte)0);
+    }
+
+    public MaterialData(final int type, final byte data) {
+        this.type = type;
+        this.data = data;
+    }
+
+    public MaterialData(final Material type, final byte data) {
+        this(type.getID(), data);
+    }
+
+    /**
+     * Gets the raw data in this material
+     *
+     * @return Raw data
+     */
+    public byte getData() {
+        return data;
+    }
+
+    /**
+     * Sets the raw data of this material
+     * 
+     * @param data New raw data
+     */
+    public void setData(byte data) {
+        this.data = data;
+    }
+
+    /**
+     * Gets the Material that this MaterialData represents
+     *
+     * @return Material represented by this MaterialData
+     */
+    public Material getItemType() {
+        return Material.getMaterial(type);
+    }
+
+    /**
+     * Gets the Material ID that this MaterialData represents
+     *
+     * @return Material ID represented by this MaterialData
+     */
+    public int getItemTypeId() {
+        return type;
+    }
+
+    /**
+     * Creates a new ItemStack based on this MaterialData
+     *
+     * @return New ItemStack containing a copy of this MaterialData
+     */
+    public ItemStack toItemStack() {
+        return new ItemStack(type);
+    }
+}