Relocate Source to proper directory.

src/main/java/appeng/parts/layers/InvLayerData.java

@@ -0,0 +1,107 @@
+package appeng.parts.layers;
+
+import java.util.List;
+
+import net.minecraft.inventory.IInventory;
+import net.minecraft.inventory.ISidedInventory;
+import net.minecraft.item.ItemStack;
+
+public class InvLayerData
+{
+
+	// a simple empty array for empty stuff..
+	private final static int[] nullSides = new int[] {};
+
+	// cache of inventory state.
+	final private int sides[][];
+	final private List<ISidedInventory> invs;
+	final private List<InvSot> slots;
+
+	public InvLayerData(int a[][], List<ISidedInventory> b, List<InvSot> c) {
+		sides = a;
+		invs = b;
+		slots = c;
+	}
+
+	/**
+	 * check if a slot index is valid, prevent crashes from bad code :)
+	 * 
+	 * @param slot
+	 * @return true, if the slot exists.
+	 */
+	boolean isSlotValid(int slot)
+	{
+		return slots != null && slot >= 0 && slot < slots.size();
+	}
+
+	public ItemStack decrStackSize(int slot, int amount)
+	{
+		if ( isSlotValid( slot ) )
+			return slots.get( slot ).decrStackSize( amount );
+
+		return null;
+	}
+
+	public int getSizeInventory()
+	{
+		if ( slots == null )
+			return 0;
+
+		return slots.size();
+	}
+
+	public ItemStack getStackInSlot(int slot)
+	{
+		if ( isSlotValid( slot ) )
+			return slots.get( slot ).getStackInSlot();
+
+		return null;
+	}
+
+	public boolean isItemValidForSlot(int slot, ItemStack itemstack)
+	{
+		if ( isSlotValid( slot ) )
+			return slots.get( slot ).isItemValidForSlot( itemstack );
+
+		return false;
+	}
+
+	public void setInventorySlotContents(int slot, ItemStack itemstack)
+	{
+		if ( isSlotValid( slot ) )
+			slots.get( slot ).setInventorySlotContents( itemstack );
+	}
+
+	public boolean canExtractItem(int slot, ItemStack itemstack, int side)
+	{
+		if ( isSlotValid( slot ) )
+			return slots.get( slot ).canExtractItem( itemstack, side );
+
+		return false;
+	}
+
+	public boolean canInsertItem(int slot, ItemStack itemstack, int side)
+	{
+		if ( isSlotValid( slot ) )
+			return slots.get( slot ).canInsertItem( itemstack, side );
+
+		return false;
+	}
+
+	public void markDirty()
+	{
+		if ( invs != null )
+		{
+			for (IInventory inv : invs)
+				inv.markDirty();
+		}
+	}
+
+	public int[] getAccessibleSlotsFromSide(int side)
+	{
+		if ( sides == null || side < 0 || side > 5 )
+			return nullSides;
+		return sides[side];
+	}
+
+}