Fix crafting stations exposing inventory that should not be exposed a…

…s they are not modifiable. (#4304)

src/main/java/slimeknights/tconstruct/tables/inventory/table/CraftingStationContainer.java

@@ -13,6 +13,7 @@
 import net.minecraft.util.ResourceLocation;
 import net.minecraft.util.math.BlockPos;
 import net.minecraftforge.items.CapabilityItemHandler;
+import net.minecraftforge.items.IItemHandlerModifiable;
 import org.apache.commons.lang3.tuple.Pair;
 import slimeknights.tconstruct.common.config.Config;
 import slimeknights.tconstruct.smeltery.tileentity.CastingTileEntity;
@@ -133,8 +134,15 @@ private static boolean isUsable(TileEntity tileEntity, PlayerEntity player) {
     return !(tileEntity instanceof IInventory) || ((IInventory)tileEntity).isUsableByPlayer(player);
   }
 
-  private static boolean hasItemHandler(TileEntity te, @Nullable Direction direction) {
-    return te.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, direction).isPresent();
+  /**
+   * Checks to see if the given Tile Entity has an item handler that's compatible with the side inventory
+   * The Tile Entity's item handler must be an instance of IItemHandlerModifiable
+   * @param tileEntity Tile to check
+   * @param direction the given direction
+   * @return True if compatible.
+   */
+  private static boolean hasItemHandler(TileEntity tileEntity, @Nullable Direction direction) {
+    return tileEntity.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, direction).filter(cap -> cap instanceof IItemHandlerModifiable).isPresent();
   }
 
   @Override