Inventory getContents Cleanup

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventory.java

@@ -50,6 +50,18 @@ public class CraftInventory implements Inventory {
         return item.isEmpty() ? null : CraftItemStack.asCraftMirror(item);
     }
 
+    protected ItemStack[] asCraftMirror(List<net.minecraft.server.ItemStack> mcItems) {
+        int size = mcItems.size();
+        ItemStack[] items = new ItemStack[size];
+
+        for (int i = 0; i < size; i++) {
+            net.minecraft.server.ItemStack mcItem = mcItems.get(i);
+            items[i] = (mcItem.isEmpty()) ? null : CraftItemStack.asCraftMirror(mcItem);
+        }
+
+        return items;
+    }
+
     @Override
     public ItemStack[] getStorageContents() {
         return getContents();
@@ -61,14 +73,9 @@ public class CraftInventory implements Inventory {
     }
 
     public ItemStack[] getContents() {
-        ItemStack[] items = new ItemStack[getSize()];
         List<net.minecraft.server.ItemStack> mcItems = getInventory().getContents();
 
-        int size = Math.min(items.length, mcItems.size());
-        for (int i = 0; i < size; i++) {
-            items[i] = (mcItems.get(i).isEmpty()) ? null : CraftItemStack.asCraftMirror(mcItems.get(i));
-        }
-        return items;
+        return asCraftMirror(mcItems);
     }
 
     public void setContents(ItemStack[] items) {

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryCrafting.java

@@ -34,10 +34,8 @@ public class CraftInventoryCrafting extends CraftInventory implements CraftingIn
 
     @Override
     public void setContents(ItemStack[] items) {
-        int resultLen = getResultInventory().getContents().size();
-        int len = getMatrixInventory().getContents().size() + resultLen;
-        if (len > items.length) {
-            throw new IllegalArgumentException("Invalid inventory size; expected " + len + " or less");
+        if (getSize() > items.length) {
+            throw new IllegalArgumentException("Invalid inventory size; expected " + getSize() + " or less");
         }
         setContents(items[0], Arrays.copyOfRange(items, 1, items.length));
     }
@@ -88,13 +86,8 @@ public class CraftInventoryCrafting extends CraftInventory implements CraftingIn
 
     public ItemStack[] getMatrix() {
         List<net.minecraft.server.ItemStack> matrix = getMatrixInventory().getContents();
-        ItemStack[] items = new ItemStack[matrix.size()];
 
-        for (int i = 0; i < matrix.size(); i++) {
-            items[i] = CraftItemStack.asCraftMirror(matrix.get(i));
-        }
-
-        return items;
+        return asCraftMirror(matrix);
     }
 
     public ItemStack getResult() {
@@ -104,13 +97,11 @@ public class CraftInventoryCrafting extends CraftInventory implements CraftingIn
     }
 
     public void setMatrix(ItemStack[] contents) {
-        if (getMatrixInventory().getContents().size() > contents.length) {
-            throw new IllegalArgumentException("Invalid inventory size; expected " + getMatrixInventory().getContents().size() + " or less");
+        if (getMatrixInventory().getSize() > contents.length) {
+            throw new IllegalArgumentException("Invalid inventory size; expected " + getMatrixInventory().getSize() + " or less");
         }
 
-        List<net.minecraft.server.ItemStack> mcItems = getMatrixInventory().getContents();
-
-        for (int i = 0; i < mcItems.size(); i++) {
+        for (int i = 0; i < getMatrixInventory().getSize(); i++) {
             if (i < contents.length) {
                 getMatrixInventory().setItem(i, CraftItemStack.asNMSCopy(contents[i]));
             } else {

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryDoubleChest.java

@@ -1,6 +1,5 @@
 package org.bukkit.craftbukkit.inventory;
 
-import net.minecraft.server.ITileEntityContainer;
 import net.minecraft.server.ITileInventory;
 import org.bukkit.block.DoubleChest;
 import org.bukkit.inventory.DoubleChestInventory;
@@ -44,8 +43,8 @@ public class CraftInventoryDoubleChest extends CraftInventory implements DoubleC
 
     @Override
     public void setContents(ItemStack[] items) {
-        if (getInventory().getContents().size() < items.length) {
-            throw new IllegalArgumentException("Invalid inventory size; expected " + getInventory().getContents().size() + " or less");
+        if (getInventory().getSize() < items.length) {
+            throw new IllegalArgumentException("Invalid inventory size; expected " + getInventory().getSize() + " or less");
         }
         ItemStack[] leftItems = new ItemStack[left.getSize()], rightItems = new ItemStack[right.getSize()];
         System.arraycopy(items, 0, leftItems, 0, Math.min(left.getSize(), items.length));

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryPlayer.java

@@ -1,7 +1,6 @@
 package org.bukkit.craftbukkit.inventory;
 
 import com.google.common.base.Preconditions;
-import java.util.Arrays;
 import net.minecraft.server.EntityPlayer;
 import net.minecraft.server.PacketPlayOutHeldItemSlot;
 import net.minecraft.server.PacketPlayOutSetSlot;
@@ -25,10 +24,9 @@ public class CraftInventoryPlayer extends CraftInventory implements org.bukkit.i
 
     @Override
     public ItemStack[] getStorageContents() {
-        return Arrays.copyOfRange(getContents(), 0, getInventory().items.size());
+        return asCraftMirror(getInventory().items);
     }
 
-
     @Override
     public ItemStack getItemInMainHand() {
         return CraftItemStack.asCraftMirror(getInventory().getItemInHand());
@@ -148,8 +146,7 @@ public class CraftInventoryPlayer extends CraftInventory implements org.bukkit.i
     }
 
     public ItemStack[] getArmorContents() {
-        int start = getInventory().items.size();
-        return Arrays.copyOfRange(getContents(), start, start + getInventory().armor.size());
+        return asCraftMirror(getInventory().armor);
     }
 
     private void setSlots(ItemStack[] items, int baseSlot, int length) {
@@ -179,8 +176,7 @@ public class CraftInventoryPlayer extends CraftInventory implements org.bukkit.i
 
     @Override
     public ItemStack[] getExtraContents() {
-        int start = getInventory().items.size() + getInventory().armor.size();
-        return Arrays.copyOfRange(getContents(), start, start + getInventory().extraSlots.size());
+        return asCraftMirror(getInventory().extraSlots);
     }
 
     @Override