new comparison methods.

util/item/AEItemDef.java

@@ -3,7 +3,10 @@ package appeng.util.item;
 import java.util.List;
 
 import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTBase;
 import appeng.api.storage.data.IAETagCompound;
+import appeng.util.Platform;
 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 
@@ -38,4 +41,34 @@ public class AEItemDef
 		t.maxDamage = maxDamage;
 		return t;
 	}
+
+	@Override
+	public boolean equals(Object obj)
+	{
+		AEItemDef def = (AEItemDef) obj;
+		return def.damageValue == damageValue && def.item == item && tagCompound == def.tagCompound;
+	}
+
+	public int getDamageValueHack(ItemStack is)
+	{
+		return Item.blazeRod.getDamage( is );
+	}
+
+	public boolean isItem(ItemStack otherStack)
+	{
+		// hackery!
+		int dmg = getDamageValueHack( otherStack );
+
+		if ( item == otherStack.getItem() && dmg == damageValue )
+		{
+			if ( (tagCompound != null) == otherStack.hasTagCompound() )
+				return true;
+
+			if ( tagCompound != null && otherStack.hasTagCompound() )
+				return Platform.NBTEqualityTest( (NBTBase) tagCompound, otherStack.getTagCompound() );
+
+			return true;
+		}
+		return false;
+	}
 }

util/item/AEItemStack.java

@@ -71,7 +71,7 @@ public final class AEItemStack extends AEStack<IAEItemStack> implements IAEItemS
 		/*
 		 * Kinda Hacky
 		 */
-		def.damageValue = Item.blazeRod.getDamage( is );
+		def.damageValue = def.getDamageValueHack( is );
 		def.def = is.itemID << Platform.DEF_OFFSET | def.damageValue;
 
 		def.dspDamage = is.getItemDamageForDisplay();
@@ -496,4 +496,22 @@ public final class AEItemStack extends AEStack<IAEItemStack> implements IAEItemS
 	{
 		return def.tagCompound;
 	}
+
+	@Override
+	public boolean isSameType(IAEItemStack otherStack)
+	{
+		if ( otherStack == null )
+			return false;
+
+		return def.equals( ((AEItemStack) otherStack).def );
+	}
+
+	@Override
+	public boolean isSameType(ItemStack otherStack)
+	{
+		if ( otherStack == null )
+			return false;
+
+		return def.isItem( otherStack );
+	}
 }