fix: Backport some Java 16 API to Java 8

Author: null2264

cobblegen/src/main/java/io/github/null2264/cobblegen/data/CGModifier.java

@@ -5,8 +5,6 @@
 import java.util.List;
 import java.util.Objects;
 
-import static io.github.null2264.cobblegen.compat.CollectionCompat.streamToList;
-
 /**
  * Class to holds modifier as Map key
  */
@@ -15,7 +13,7 @@ public class CGModifier {
 
     public CGModifier(List<CGIdentifier> modifiers) {
         if (modifiers.size() >= 4) throw new IllegalArgumentException("Cannot have more than 4 modifiers");
-        this.modifiers = streamToList(modifiers.stream().sorted());
+        this.modifiers = modifiers.stream().sorted().toList();
     }
 
     public void writeToBuf(FriendlyByteBuf buf) {
@@ -38,4 +36,4 @@ public boolean equals(Object o) {
     public int hashCode() {
         return Objects.hash(modifiers);
     }
-}
+}

cobblegen/src/main/java/io/github/null2264/cobblegen/util/PluginFinder.java

@@ -5,8 +5,6 @@
 
 import java.util.*;
 
-import static io.github.null2264.cobblegen.compat.CollectionCompat.streamToList;
-
 #if FABRIC
 import net.fabricmc.loader.api.FabricLoader;
 #else
@@ -28,12 +26,11 @@ public class PluginFinder
 {
     public static List<PlugInContainer> getModPlugins() {
         #if FABRIC
-        return streamToList(
-                FabricLoader.getInstance()
-                        .getEntrypointContainers("cobblegen_plugin", CobbleGenPlugin.class)
-                        .stream()
-                        .map(entrypoint -> new PlugInContainer(entrypoint.getProvider().getMetadata().getId(), entrypoint.getEntrypoint()))
-        );
+        return FabricLoader.getInstance()
+            .getEntrypointContainers("cobblegen_plugin", CobbleGenPlugin.class)
+            .stream()
+            .map(entrypoint -> new PlugInContainer(entrypoint.getProvider().getMetadata().getId(), entrypoint.getEntrypoint()))
+            .toList();
         #else
         return AnnotatedFinder.getInstances(CGPlugin.class, CobbleGenPlugin.class);
         #endif
@@ -46,11 +43,10 @@ public static <T> List<PlugInContainer> getInstances(Class<?> annotationClass, C
             List<ModFileScanData> allScanData = ModList.get().getAllScanData();
             List<PlugInContainer> instances = new ArrayList<>();
             for (ModFileScanData data : allScanData) {
-                List<String> modIds = streamToList(
-                        data.getIModInfoData().stream()
-                               .flatMap(info -> info.getMods().stream())
-                               .map(IModInfo::getModId)
-                );
+                List<String> modIds = data.getIModInfoData().stream()
+                   .flatMap(info -> info.getMods().stream())
+                   .map(IModInfo::getModId)
+                   .toList();
                 String modId = "[" + String.join(", ", modIds) + "]";
 
                 Iterable<ModFileScanData.AnnotationData> annotations = data.getAnnotations();

mclib/src/main/java/io/github/null2264/cobblegen/extensions/java/util/List/ListExt.java

@@ -0,0 +1,20 @@
+package io.github.null2264.cobblegen.extensions.java.util.List;
+
+import manifold.ext.rt.api.Extension;
+
+#if MC<11700
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+#endif
+
+@Extension
+public final class ListExt {
+    #if MC<11700
+    @SafeVarargs
+    @Extension
+    public static <T> List<T> of(T... items) {
+        return new ArrayList<>(Arrays.asList(items));
+    }
+    #endif
+}

mclib/src/main/java/io/github/null2264/cobblegen/extensions/java/util/stream/Stream/StreamExt.java

@@ -0,0 +1,23 @@
+package io.github.null2264.cobblegen.extensions.java.util.stream.Stream;
+
+import manifold.ext.rt.api.Extension;
+
+#if MC<11700
+import manifold.ext.rt.api.This;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Stream;
+#endif
+
+@Extension
+public final class StreamExt {
+
+    #if MC<11700
+    @SuppressWarnings("unchecked")
+    public static <T> List<T> toList(@This Stream<T> stream) {
+        return (List<T>) Collections.unmodifiableList(new ArrayList<>(Arrays.asList(stream.toArray())));
+    }
+    #endif
+}