Fix void protection not working with MB with custom output hatch field (#2051)

* Fix void protection not working with MB with custom output hatch field

* forgot to filter

* Add util method for DT-like structure

1 files changed, 22 insertions, 0 deletions

diff --git a/src/main/java/gregtech/api/interfaces/fluid/IFluidStore.java b/src/main/java/gregtech/api/interfaces/fluid/IFluidStore.java
new file mode 100644
index 0000000000..047cf4df5b
--- /dev/null
+++ b/src/main/java/gregtech/api/interfaces/fluid/IFluidStore.java
@@ -0,0 +1,22 @@
+package gregtech.api.interfaces.fluid;
+
+import javax.annotation.Nonnull;
+
+import net.minecraftforge.fluids.FluidStack;
+import net.minecraftforge.fluids.IFluidTank;
+
+/**
+ * Objects implementing this interface can be used for storing certain fluid, especially for recipe output.
+ */
+public interface IFluidStore extends IFluidTank {
+
+    /**
+     * @return If this does not have partially filled fluid nor have restriction on what fluid to accept.
+     */
+    boolean isEmptyAndAcceptsAnyFluid();
+
+    /**
+     * @return Whether to allow given fluid to be inserted into this.
+     */
+    boolean canStoreFluid(@Nonnull FluidStack fluidStack);
+}