1 files changed, 64 insertions, 0 deletions
diff --git a/src/main/java/gregtech/api/interfaces/tileentity/IVoidable.java b/src/main/java/gregtech/api/interfaces/tileentity/IVoidable.java
new file mode 100644
index 0000000000..d6325e8597
--- /dev/null
+++ b/src/main/java/gregtech/api/interfaces/tileentity/IVoidable.java
@@ -0,0 +1,64 @@
+package gregtech.api.interfaces.tileentity;
+
+import java.util.List;
+
+import net.minecraft.item.ItemStack;
+import net.minecraftforge.fluids.FluidStack;
+
+import gregtech.api.enums.VoidingMode;
+import gregtech.api.interfaces.fluid.IFluidStore;
+
+/**
+ * Machines implementing this interface can have logic to configure whether to void excess output or not.
+ */
+public interface IVoidable {
+
+    /**
+     * @return if this machine can prevent excess item and fluid from voiding.
+     */
+    boolean supportsVoidProtection();
+
+    /**
+     * @return if this machine is configured to not void excess item.
+     */
+    default boolean protectsExcessItem() {
+        return supportsVoidProtection() && getVoidingMode().protectItem;
+    }
+
+    /**
+     * @return if this machine is configured to not void excess fluid.
+     */
+    default boolean protectsExcessFluid() {
+        return supportsVoidProtection() && getVoidingMode().protectFluid;
+    }
+
+    VoidingMode getVoidingMode();
+
+    void setVoidingMode(VoidingMode mode);
+
+    /**
+     * @param toOutput List of items this machine is going to output.
+     * @return List of slots available for item outputs. Null element represents empty slot.
+     */
+    List<ItemStack> getItemOutputSlots(ItemStack[] toOutput);
+
+    /**
+     * @param toOutput List of fluids this machine is going to output.
+     * @return List of slots available for fluid outputs.
+     */
+    List<? extends IFluidStore> getFluidOutputSlots(FluidStack[] toOutput);
+
+    /**
+     * @return If this machine has ability to dump item outputs to ME network.
+     *         This doesn't need to check if it can actually dump to ME,
+     *         as this might be called every tick and cause lag.
+     */
+    boolean canDumpItemToME();
+
+    /**
+     * @return If this machine has ability to dump fluid outputs to ME network.
+     *         This doesn't need to check if it can actually dump to ME,
+     *         as this might be called every tick and cause lag.
+     */
+    boolean canDumpFluidToME();
+}