Hello, I am having a bit of trouble with the Tile Entity for my RF Generator for my mod, Mac's Utilities Remastered. The problem that I am having is that when I put a stack of Items into a slot in the GUI, close the GUI, exit the world, and then rejoin the world, the Items that were in the slot were not saved to NBT. How do I fix this?

 

TileEntityRFGenerator.java:

 

package com.macintoshuser2.macsutilities.tileentities;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.inventory.IInventory;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.text.ITextComponent
import net.minecraft.util.text.TextComponentString;
import net.minecraft.util.text.TextComponentTranslation;

public class TileEntityRFGenerator extends TileEntity implements IInventory {
   
   private ItemStack[] inventory;
   private String customName;

   public TileEntityRFGenerator() {
      this.inventory = new ItemStack[this.getSizeInventory()];
   }

   public void setCustomName(String customName) {
      this.customName = customName;
   }

   public String getCustomName() {
      return customName;
   }
   
   @Override
   public String getName() {
      return this.hasCustomName() ? this.customName : "container.rfGenerator";
   }

   @Override
   public boolean hasCustomName() {
      return this.customName != null && !this.customName.equals("");
   }

   @Override
   public ITextComponent getDisplayName() {
      return this.hasCustomName() ? new TextComponentString(this.getName()) : new TextComponentTranslation(this.getName());
   }

   @Override
   public int getSizeInventory() {
      return 1;
   }
   
   @Override
   public ItemStack getStackInSlot(int index) {
      if(index < 0 || index >= this.getSizeInventory()) {
         return null;
      }
      return this.inventory[index];
   }

   @Override
   public ItemStack decrStackSize(int index, int count) {
      if(this.getStackInSlot(index) != null) {
         itemstack = this.getStackInSlot(index);
         this.setInventorySlotContents(index, null);
         this.markDirty();
         return itemstack;
      } else {
         itemstack = this.getStackInSlot(index).splitStack(count);
         if(this.getTackInSlot(index).stackSize <= 0) {
            this.setInventorySlotContents(index, null);
         } else {
            this.setInventorySlotContents(index, this.getStackInSlot(index));
         }

         this.markDirty();
         return itemstack;
      }
   } else {
      return null;
   }

   @Override
   public void setInventorySlotContents(int index, ItemStack stack) {
      if(index < 0 || index >= this.getSizeInventory()) {
         return;
      }
   
      if(stack != null && stack.stackSize > this.getInventoryStackLimit()) {
         stack.stackSize = this.getInventoryStackLimit();
      }

      if(stack != null && stack.stackSize == 0) {
         stack = null;
      }
      
      this.inventory[index] = stack;
      this.markDirty();
   }

   @Override
   public ItemStack removeStackFromSlot(int index) {
      ItemStack stack = this.getStackInSlot(index);
      this.setInventorySlotContents(index, null);
      return stack;
   }

   @Override
   public int getInventoryStackLimit() {
      return 64;
   }

   @Override
   public boolean isUseableByPlayer(EntityPlayer player) {
      return this.worldObj.getTileEntity(this.getPos()) == this && player.getDistanceSq(this.pos.add(0.5, 0.5, 0.5)) <= 64
   }

   @Override
   public boolean isItemValidForSlot(int index, ItemStack stack) {
      return stack.getItem() == Items.REDSTONE || stack.getItem() == Item.getItemFromBlock(Blocks.REDSTONE_BLOCK) ? true : false;
   }

   @Override
   public int getField(int id) {
      return 0;
   }

   @Override
   public void setField(int id, int value) {
   }

   @Override
   public int getFieldCount() {
      return 0;
   }

   @Override
   public void clear() {
      for(int i = 0; i < this.getSizeInventory(); i++) {
         this.setInventorySlotContents(i, null);
      }
   }

   @Override
   public NBTTagCompound writeToNBT(NBTTagCompound nbt) {
      super.writeToNBT(nbt);

      NBTTagList list = new NBTTagList();
      for(int i = 0; i < this.getSizeInventory(); ++i) {
         if(this.getStackInSlot(i) != null) {
            NBTTagCompound stackTag = new NBTTagCompound();
            stackTag.setByte("Slot", (byte) i);
            this.getStackInSlot(i).writeToNBT(stackTag);
            list.appendTag(stackTag);
         }
      }
      nbt.setTag("Items", list);

      if(this.hasCustomName()) {
         nbt.setString("CustomName", this.getCustomName());
      }
      return nbt;
   }

   @Override
   public void redFromNBT(NBTTagCompound nbt) {
      super.readFromNBT(nbt);
      
      NBTTagList list = nbt.getTagList("Items", 10);
      for(int i = 0; i < list.tagCount(); ++i) {
         NBTTagCompound stackTag = list.getCompoundTagAt(i);
         int slot = stackTag.getByte("Slot") & 255;
         this.setInventorySlotContents(slot, ItemStack.loadItemStackFromNBT(stackTag));
      }
      
      if(nbt.hasKey("CustomName", ) {
            this.setCustomName(nbt.getString("CustomName"));
      }
   }
   
   @Override
   public void openInventory(EntityPlayer player) {
   }

   @Override
   public void closeInventory(EntityPlayer player) {
   }
}

 

 

How do I fix it?

Don't use IInventory, use Capabilities.

Namely the ItemStackHandler capability.

How would I go about changing my container accordingly upon making that change?

How would I go about changing my container accordingly upon making that change?

Instead of new Slot do new SlotItemHandler

I made the changes to the container and now I can't open the GUI and the block won't drop items upon being broken.

 

ContainerRFGenerator.java:

 

package com.macintoshuser2.macsutilities.container;

import com.macintoshuser2.macsutilities.tileentities.TileEntityRFGenerator;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;
import net.minecraftforge.items.IItemHandler;
import net.minecraftforge.items.SlotItemHandler;

public class ContainerRFGenerator extends Container {

private TileEntityRFGenerator rfGen;

public ContainerRFGenerator(IInventory playerInventory, TileEntityRFGenerator rfGen) {
	this.rfGen = rfGen;

	this.addSlotToContainer(new SlotItemHandler((IItemHandler) rfGen, 0, 30, 35));

	for(int y = 0; y < 3; ++y) {
		for(int x = 0; x < 9; ++x) {
			this.addSlotToContainer(new Slot(playerInventory, x + y * 9 + 9, 8 + x * 18, 84 + y * 18));
		}
	}

	for(int x = 0; x <9; ++x) {
		this.addSlotToContainer(new Slot(playerInventory, x, 8 + x * 18, 142));
	}
}

@Override
public boolean canInteractWith(EntityPlayer playerIn) {
	return true;
	//return this.rfGen.isUseableByPlayer(playerIn);
}

@Override
public ItemStack transferStackInSlot(EntityPlayer playerIn, int fromSlot) {
	ItemStack previous = null;
	Slot slot = (Slot) this.inventorySlots.get(fromSlot);

	if(slot != null && slot.getHasStack()) {
		ItemStack current = slot.getStack();
		previous = current.copy();

		if(fromSlot < 1) {
			if(!this.mergeItemStack(current,  1,  this.inventorySlots.size(), true)) {
				return null;
			}
		} else {
			if(!this.mergeItemStack(current, 0, 1, false)) {
				return null;
			}
		}

		if(current.stackSize == 0) {
			slot.putStack((ItemStack) null);
		} else {
			slot.onSlotChanged();
		}
	}
	return previous;
}
}

 

 

TileEntityRFGenerator.java:

 

package com.macintoshuser2.macsutilities.tileentities;

import javax.annotation.Nullable;

import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumFacing;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.ItemStackHandler;

public class TileEntityRFGenerator extends TileEntity {
private ItemStackHandler inventory = new ItemStackHandler(1);

@Override
public NBTTagCompound writeToNBT(NBTTagCompound compound) {
	compound.setTag("inventory", inventory.serializeNBT());
	return super.writeToNBT(compound);
}

@Override
public void readFromNBT(NBTTagCompound compound) {
	inventory.deserializeNBT(compound.getCompoundTag("inventory"));
	super.readFromNBT(compound);
}

@Override
public boolean hasCapability(Capability<?> capability, EnumFacing facing) {
	return capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY || super.hasCapability(capability, facing);
}

@Nullable
@Override
public <T> T getCapability(Capability<T> capability, EnumFacing facing) {
	return capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY ? (T)inventory : super.getCapability(capability, facing);
}
}

 

BlockRFGenerator.java:

 

package com.macintoshuser2.macsutilities.blocks;

import java.util.List;

import org.lwjgl.input.Keyboard;

import com.macintoshuser2.macsutilities.MacsUtilities;
import com.macintoshuser2.macsutilities.client.gui.MacGuiHandler;
import com.macintoshuser2.macsutilities.tileentities.TileEntityRFGenerator;

import net.minecraft.block.BlockContainer;
import net.minecraft.block.material.Material;
import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.Entity;
import net.minecraft.entity.boss.EntityDragon;
import net.minecraft.entity.boss.EntityWither;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumBlockRenderType;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumHand;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.text.TextFormatting;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.IItemHandler;

public class BlockRFGenerator extends BlockContainer {
public BlockRFGenerator() {
	super(Material.IRON);

	this.setUnlocalizedName("rf_generator");
	this.setRegistryName("rf_generator");
}

@Override
public void breakBlock(World world, BlockPos pos, IBlockState blockstate) {
    TileEntityRFGenerator rfGen = new TileEntityRFGenerator();
    
    IItemHandler itemHandler = rfGen.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, EnumFacing.NORTH);
    ItemStack stack = itemHandler.getStackInSlot(0);
    if(stack != null) {
    	EntityItem item = new EntityItem(world, pos.getX(), pos.getY(), pos.getZ(), stack);
    	world.spawnEntityInWorld(item);
    }
    
    super.breakBlock(world, pos, blockstate);
}

@Override
public boolean isFullBlock(IBlockState state) {
	return true;
}

@Override
public boolean isOpaqueCube(IBlockState state) {
	return false;
}

@Override
public void addInformation(ItemStack stack, EntityPlayer player, List<String> tooltip, boolean advanced) {
	tooltip.add(TextFormatting.BOLD + "<HOLD LEFT SHIFT FOR MORE INFO>");
	if(Keyboard.isKeyDown(Keyboard.KEY_LSHIFT)) {
		tooltip.remove(1);
		tooltip.add(TextFormatting.RED + "Redstone Dust = 50 RF/t");
		tooltip.add(TextFormatting.RED + "Redstone Block = 450 RF/t");
	}
}

@Override
public boolean canEntityDestroy(IBlockState state, IBlockAccess world, BlockPos pos, Entity entity) {
	return entity instanceof EntityWither || entity instanceof EntityDragon ? false : true;
}

@Override
public TileEntity createNewTileEntity(World worldIn, int meta) {
	return new TileEntityRFGenerator();
}

@Override
public EnumBlockRenderType getRenderType(IBlockState state) {
	return EnumBlockRenderType.MODEL;
}

@Override
public boolean onBlockActivated(World worldIn, BlockPos pos, IBlockState state, EntityPlayer playerIn, EnumHand hand, ItemStack heldItem, EnumFacing side, float hitX, float hitY, float hitZ) {
	if(!worldIn.isRemote) {
		playerIn.openGui(MacsUtilities.instanceOfMacUtil, MacGuiHandler.RF_GENERATOR_IDENTIFIER, worldIn, pos.getX(), pos.getY(), pos.getZ());
	}
	return true;
}
}

You need to change your container and guicontainer as well.

 

Instead of taking an IInventory, take in your TE.  Then for slots, instead of

new Slot

you want

new SlotItemHandler

.

 

e.g.

https://github.com/Draco18s/ReasonableRealism/blob/master/src/main/java/com/draco18s/ores/inventory/ContainerSifter.java

 

(SlotDust is a custom slot class that extends SlotItemHandler)

Ok, I made the changes and the gui will now open. I am however still having trouble with the NBT. The Items in the slot will not save to NBT when I log out of the world and will not read it when I get back into the world.  I am also still having the issue of Items not dropping when I break the block.

 

I put the code on github that way it'd just make it a whole lot easier.

 

BlockRFGenerator.java: https://github.com/Macintoshuser2/MacsUtilitiesRemastered/blob/master/src/main/java/com/macintoshuser2/macsutilities/blocks/BlockRFGenerator.java

 

ContainerRFGenerator.java: https://github.com/Macintoshuser2/MacsUtilitiesRemastered/blob/master/src/main/java/com/macintoshuser2/macsutilities/container/ContainerRFGenerator.java

 

TileEntityRFGenerator.java: https://github.com/Macintoshuser2/MacsUtilitiesRemastered/blob/master/src/main/java/com/macintoshuser2/macsutilities/tileentities/TileEntityRFGenerator.java

 

GuiRFGenerator.java: https://github.com/Macintoshuser2/MacsUtilitiesRemastered/blob/master/src/main/java/com/macintoshuser2/macsutilities/client/gui/GuiRFGenerator.java

 

Never mind about the previous reply. I forgot to register the TileEntity. *facepalm* Works fine now.