1 files changed, 40 insertions, 0 deletions
diff --git a/src/main/java/me/shedaniel/rei/api/subsets/SubsetsRegistry.java b/src/main/java/me/shedaniel/rei/api/subsets/SubsetsRegistry.java
new file mode 100644
index 000000000..3c7e46304
--- /dev/null
+++ b/src/main/java/me/shedaniel/rei/api/subsets/SubsetsRegistry.java
@@ -0,0 +1,40 @@
+package me.shedaniel.rei.api.subsets;
+
+import me.shedaniel.rei.api.EntryStack;
+import me.shedaniel.rei.impl.subsets.SubsetsRegistryImpl;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+import java.util.Set;
+
+@ApiStatus.Experimental
+public interface SubsetsRegistry {
+    SubsetsRegistry INSTANCE = new SubsetsRegistryImpl();
+    
+    /**
+     * Gets all paths an entry is in, note that this is a really slow call as it looks through all paths.
+     */
+    @NotNull
+    List<String> getEntryPaths(@NotNull EntryStack stack);
+    
+    @Nullable
+    Set<EntryStack> getPathEntries(@NotNull String path);
+    
+    @NotNull
+    Set<EntryStack> getOrCreatePathEntries(@NotNull String path);
+    
+    @NotNull
+    Set<String> getPaths();
+    
+    void registerPathEntry(@NotNull String path, @NotNull EntryStack stack);
+    
+    void registerPathEntries(@NotNull String path, @NotNull Collection<EntryStack> stacks);
+    
+    default void registerPathEntries(@NotNull String path, @NotNull EntryStack... stacks) {
+        registerPathEntries(path, Arrays.asList(stacks));
+    }
+}