Use IItemHandler instead of IInventory internally (#2971)

* Use IItemHandler instead of IInventory internally

src/main/java/appeng/util/inv/WrapperInvItemHandler.java

@@ -0,0 +1,159 @@
+/*
+ * This file is part of Applied Energistics 2.
+ * Copyright (c) 2013 - 2017, AlgorithmX2, All rights reserved.
+ *
+ * Applied Energistics 2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Applied Energistics 2 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
+ */
+
+package appeng.util.inv;
+
+
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.inventory.IInventory;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.text.ITextComponent;
+import net.minecraftforge.items.IItemHandler;
+
+import appeng.util.helpers.ItemHandlerUtil;
+
+
+public class WrapperInvItemHandler implements IInventory
+{
+	private final IItemHandler inv;
+
+	public WrapperInvItemHandler( final IItemHandler inv )
+	{
+		this.inv = inv;
+	}
+
+	@Override
+	public String getName()
+	{
+		return null;
+	}
+
+	@Override
+	public boolean hasCustomName()
+	{
+		return false;
+	}
+
+	@Override
+	public ITextComponent getDisplayName()
+	{
+		return null;
+	}
+
+	@Override
+	public int getSizeInventory()
+	{
+		return inv.getSlots();
+	}
+
+	@Override
+	public boolean isEmpty()
+	{
+		return ItemHandlerUtil.isEmpty( inv );
+	}
+
+	@Override
+	public ItemStack getStackInSlot( int index )
+	{
+		return inv.getStackInSlot( index );
+	}
+
+	@Override
+	public ItemStack decrStackSize( int index, int count )
+	{
+		return inv.extractItem( index, count, false );
+	}
+
+	@Override
+	public ItemStack removeStackFromSlot( int index )
+	{
+		return inv.extractItem( index, inv.getSlotLimit( index ), false );
+	}
+
+	@Override
+	public void setInventorySlotContents( int index, ItemStack stack )
+	{
+		ItemHandlerUtil.setStackInSlot( inv, index, stack );
+	}
+
+	@Override
+	public int getInventoryStackLimit()
+	{
+		int max = 0;
+		for( int i = 0; i < inv.getSlots(); ++i )
+		{
+			max = Math.max( max, inv.getSlotLimit( i ) );
+		}
+		return max;
+	}
+
+	@Override
+	public void markDirty()
+	{
+		ItemHandlerUtil.markDirty( inv, -1 );
+	}
+
+	@Override
+	public boolean isUsableByPlayer( EntityPlayer player )
+	{
+		return false;
+	}
+
+	@Override
+	public void openInventory( EntityPlayer player )
+	{
+		// NOP
+	}
+
+	@Override
+	public void closeInventory( EntityPlayer player )
+	{
+		// NOP
+	}
+
+	@Override
+	public boolean isItemValidForSlot( int index, ItemStack stack )
+	{
+		return ItemHandlerUtil.isItemValidForSlot( inv, index, stack );
+	}
+
+	@Override
+	public int getField( int id )
+	{
+		return 0;
+	}
+
+	@Override
+	public void setField( int id, int value )
+	{
+		// NOP
+	}
+
+	@Override
+	public int getFieldCount()
+	{
+		return 0;
+	}
+
+	@Override
+	public void clear()
+	{
+		ItemHandlerUtil.clear( inv );
+	}
+
+}