Toposort recipes so it's actually usably fast

1 files changed, 47 insertions, 0 deletions

diff --git a/src/main/java/lv/enes/mc/eris_alchemy/utils/OptionalDoubleSummer.java b/src/main/java/lv/enes/mc/eris_alchemy/utils/OptionalDoubleSummer.java
new file mode 100644
index 0000000..04b6ca8
--- /dev/null
+++ b/src/main/java/lv/enes/mc/eris_alchemy/utils/OptionalDoubleSummer.java
@@ -0,0 +1,47 @@
+package lv.enes.mc.eris_alchemy.utils;
+
+import java.util.OptionalDouble;
+import java.util.Set;
+import java.util.function.BiConsumer;
+import java.util.function.BinaryOperator;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import java.util.stream.Collector;
+
+public class OptionalDoubleSummer implements Collector<OptionalDouble, Ref<OptionalDouble>, OptionalDouble> {
+        @Override
+        public Supplier<Ref<OptionalDouble>> supplier() {
+                return () -> new Ref<>(OptionalDouble.of(0));
+        }
+
+        @Override
+        public BiConsumer<Ref<OptionalDouble>, OptionalDouble> accumulator() {
+                return (ref, od) -> {
+                        if (ref.getValue().isPresent()) {
+                                if (od.isPresent()) {
+                                        ref.setValue(OptionalDouble.of(ref.getValue().getAsDouble() + od.getAsDouble()));
+                                } else {
+                                        ref.setValue(OptionalDouble.empty());
+                                }
+                        }
+                };
+        }
+
+        @Override
+        public BinaryOperator<Ref<OptionalDouble>> combiner() {
+                return (ref1, ref2) -> {
+                        accumulator().accept(ref1, ref2.getValue());
+                        return ref1;
+                };
+        }
+
+        @Override
+        public Function<Ref<OptionalDouble>, OptionalDouble> finisher() {
+                return Ref::getValue;
+        }
+
+        @Override
+        public Set<Characteristics> characteristics() {
+                return Set.of(Characteristics.UNORDERED);
+        }
+}