Recipe Engine Added, not quite done yet tho.

recipes/handlers/CraftHandler.java

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+package appeng.recipes.handlers;
+
+import java.util.List;
+
+import appeng.recipes.Ingredient;
+import appeng.recipes.RecipeError;
+import appeng.recipes.RegistrationError;
+
+public class CraftHandler
+{
+
+	public void setup(List<List<Ingredient>> input, List<List<Ingredient>> output) throws RecipeError
+	{
+	}
+
+	public void register() throws RegistrationError
+	{
+	}
+
+}

recipes/handlers/Grind.java

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+package appeng.recipes.handlers;
+
+public class Grind extends CraftHandler
+{
+
+}

recipes/handlers/Shaped.java

@@ -0,0 +1,46 @@
+package appeng.recipes.handlers;
+
+import java.util.List;
+
+import appeng.recipes.Ingredient;
+import appeng.recipes.RecipeError;
+import appeng.recipes.RegistrationError;
+
+public class Shaped extends CraftHandler
+{
+
+	private int rows;
+	private int cols;
+
+	List<List<Ingredient>> inputs;
+	Ingredient output;
+
+	@Override
+	public void setup(List<List<Ingredient>> input, List<List<Ingredient>> output) throws RecipeError
+	{
+		if ( output.size() == 1 && output.get( 0 ).size() == 1 )
+		{
+			rows = inputs.size();
+			if ( rows > 0 && inputs.size() <= 3 )
+			{
+				cols = inputs.get( 0 ).size();
+				for (int x = 0; x < inputs.size(); x++)
+					if ( inputs.get( x ).size() != cols )
+						throw new RecipeError( "all rows in a shaped crafting recipe must contain the same number of ingredients." );
+
+				inputs = input;
+				this.output = output.get( 0 ).get( 0 );
+			}
+			else
+				throw new RecipeError( "shaped crafting recpies must have 1-3 rows." );
+		}
+		else
+			throw new RecipeError( "Crafting must produce a single output." );
+	}
+
+	@Override
+	public void register() throws RegistrationError
+	{
+
+	}
+}

recipes/handlers/Shapeless.java

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+package appeng.recipes.handlers;
+
+import java.util.List;
+
+import appeng.recipes.Ingredient;
+import appeng.recipes.RecipeError;
+import appeng.recipes.RegistrationError;
+
+public class Shapeless extends CraftHandler
+{
+
+	List<Ingredient> inputs;
+	Ingredient output;
+
+	@Override
+	public void setup(List<List<Ingredient>> input, List<List<Ingredient>> output) throws RecipeError
+	{
+		if ( output.size() == 1 && output.get( 0 ).size() == 1 )
+		{
+			if ( inputs.size() == 1 )
+			{
+				inputs = input.get( 0 );
+				this.output = output.get( 0 ).get( 0 );
+			}
+			else
+				throw new RecipeError( "Shapeless crafting recipes cannot have rows." );
+		}
+		else
+			throw new RecipeError( "Crafting must produce a single output." );
+	}
+
+	@Override
+	public void register() throws RegistrationError
+	{
+
+	}
+}

recipes/handlers/Smelt.java

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+package appeng.recipes.handlers;
+
+import java.util.List;
+
+import appeng.recipes.Ingredient;
+import appeng.recipes.RecipeError;
+import appeng.recipes.RegistrationError;
+import cpw.mods.fml.common.registry.GameRegistry;
+
+public class Smelt extends CraftHandler
+{
+
+	Ingredient in;
+	Ingredient out;
+
+	@Override
+	public void setup(List<List<Ingredient>> input, List<List<Ingredient>> output) throws RecipeError
+	{
+		if ( input.size() == 1 && output.size() == 1 )
+		{
+			List<Ingredient> inputList = input.get( 0 );
+			List<Ingredient> outputList = output.get( 0 );
+			if ( inputList.size() == 1 && outputList.size() == 1 )
+			{
+				in = inputList.get( 0 );
+				out = outputList.get( 0 );
+				return;
+			}
+		}
+		throw new RecipeError( "Smelting recipe can only have a single input and output." );
+	}
+
+	@Override
+	public void register() throws RegistrationError
+	{
+		if ( in.getItemStack().getItem() == null )
+			throw new RegistrationError( in.toString() + ": Smelting Input is not a valid item." );
+
+		if ( out.getItemStack().getItem() == null )
+			throw new RegistrationError( out.toString() + ": Smelting Output is not a valid item." );
+
+		GameRegistry.addSmelting( in.getItemStack(), out.getItemStack(), 0 );
+	}
+
+}