1 files changed, 49 insertions, 0 deletions
diff --git a/src/main/java/me/shedaniel/rei/impl/FluidSupportProviderImpl.java b/src/main/java/me/shedaniel/rei/impl/FluidSupportProviderImpl.java
new file mode 100644
index 000000000..dede539c0
--- /dev/null
+++ b/src/main/java/me/shedaniel/rei/impl/FluidSupportProviderImpl.java
@@ -0,0 +1,49 @@
+package me.shedaniel.rei.impl;
+
+import com.google.common.collect.Lists;
+import me.shedaniel.rei.api.EntryStack;
+import me.shedaniel.rei.api.fluid.FluidSupportProvider;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.Objects;
+
+@ApiStatus.Experimental
+@ApiStatus.Internal
+public class FluidSupportProviderImpl implements FluidSupportProvider {
+    private final List<FluidProvider> providers = Lists.newArrayList();
+    
+    public void reset() {
+        providers.clear();
+    }
+    
+    @Override
+    public void registerFluidProvider(@NotNull FluidProvider provider) {
+        providers.add(Objects.requireNonNull(provider, "Registered provider is null!"));
+    }
+    
+    @Override
+    public @NotNull EntryStack fluidToItem(@NotNull EntryStack fluidStack) {
+        if (fluidStack.isEmpty()) return EntryStack.empty();
+        if (fluidStack.getType() != EntryStack.Type.FLUID)
+            throw new IllegalArgumentException("EntryStack must be fluid!");
+        for (FluidProvider provider : providers) {
+            EntryStack stack = Objects.requireNonNull(provider.fluidToItem(fluidStack), provider.getClass() + " is creating null objects for fluidToItem!");
+            if (!stack.isEmpty()) return stack;
+        }
+        return EntryStack.empty();
+    }
+    
+    @Override
+    public @NotNull EntryStack itemToFluid(@NotNull EntryStack itemStack) {
+        if (itemStack.isEmpty()) return EntryStack.empty();
+        if (itemStack.getType() != EntryStack.Type.ITEM)
+            throw new IllegalArgumentException("EntryStack must be item!");
+        for (FluidProvider provider : providers) {
+            EntryStack stack = Objects.requireNonNull(provider.itemToFluid(itemStack), provider.getClass() + " is creating null objects for itemToFluid!");
+            if (!stack.isEmpty()) return stack;
+        }
+        return EntryStack.empty();
+    }
+}