Some tweaks to the liquid dictionary, to allow for canonical liquid stacks for things like rendering

common/net/minecraftforge/liquids/LiquidDictionary.java

@@ -7,6 +7,8 @@ import net.minecraft.block.Block;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.event.Event;
 
+import com.google.common.collect.BiMap;
+import com.google.common.collect.HashBiMap;
 import com.google.common.collect.ImmutableMap;
 
 /**
@@ -17,7 +19,7 @@ import com.google.common.collect.ImmutableMap;
 public abstract class LiquidDictionary
 {
 
-    private static Map<String, LiquidStack> liquids = new HashMap<String, LiquidStack>();
+    private static BiMap<String, LiquidStack> liquids = HashBiMap.create();
 
     /**
      * When creating liquids you should call this function.
@@ -37,6 +39,7 @@ public abstract class LiquidDictionary
             return existing.copy();
         }
         liquids.put(name, liquid.copy());
+
         MinecraftForge.EVENT_BUS.post(new LiquidRegisterEvent(name, liquid));
         return liquid;
     }
@@ -62,6 +65,10 @@ public abstract class LiquidDictionary
         return liquid;
     }
 
+    public static LiquidStack getCanonicalLiquid(String name)
+    {
+        return liquids.get(name);
+    }
     /**
      * Get an immutable list of the liquids defined
      *
@@ -86,10 +93,15 @@ public abstract class LiquidDictionary
             this.Liquid = liquid.copy();
         }
     }
-    
+
     static
     {
         getOrCreateLiquid("Water", new LiquidStack(Block.waterStill, LiquidContainerRegistry.BUCKET_VOLUME));
         getOrCreateLiquid("Lava", new LiquidStack(Block.lavaStill, LiquidContainerRegistry.BUCKET_VOLUME));
     }
+
+    public static String findLiquidName(LiquidStack reference)
+    {
+        return liquids.inverse().get(reference);
+    }
 }

common/net/minecraftforge/liquids/LiquidStack.java

@@ -1,8 +1,12 @@
 package net.minecraftforge.liquids;
 
 import static cpw.mods.fml.relauncher.Side.CLIENT;
+
+import com.google.common.base.Objects;
+
 import cpw.mods.fml.relauncher.SideOnly;
 import net.minecraft.block.Block;
+import net.minecraft.block.BlockFluid;
 import net.minecraft.client.renderer.texture.TextureManager;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
@@ -119,6 +123,14 @@ public class LiquidStack
     @SideOnly(CLIENT)
     public Icon getRenderingIcon()
     {
+        if (itemID == Block.waterStill.blockID)
+        {
+            return BlockFluid.func_94424_b("water");
+        }
+        else if (itemID == Block.lavaStill.blockID)
+        {
+            return BlockFluid.func_94424_b("lava");
+        }
         return renderingIcon;
     }
 
@@ -127,4 +139,16 @@ public class LiquidStack
     {
         this.renderingIcon = icon;
     }
+
+    @Override
+    public final int hashCode()
+    {
+        return Objects.hashCode(itemID, itemMeta);
+    }
+
+    @Override
+    public final boolean equals(Object ob)
+    {
+        return ob instanceof LiquidStack && Objects.equal(((LiquidStack)ob).itemID, itemID) && Objects.equal(((LiquidStack)ob).itemMeta, itemMeta);
+    }
 }

common/net/minecraftforge/liquids/LiquidTank.java

@@ -139,4 +139,9 @@ public class LiquidTank implements ILiquidTank {
         this.tankPressure = pressure;
     }
 
+
+    public String getLiquidName()
+    {
+        return liquid!= null ? LiquidDictionary.findLiquidName(liquid) : null;
+    }
 }