yaml: Rewrite using event-based loading and saving

This allows us to capture more information as representation
hints and to precisely control the output.

We can also read comments events to properly round-trip comments in
configuration files

build.gradle

@@ -1,3 +1,5 @@
+import org.jetbrains.gradle.ext.ActionDelegationConfig
+
 import static org.eclipse.jgit.lib.Repository.shortenRefName
 
 plugins {
@@ -8,10 +10,18 @@ plugins {
     alias(libs.plugins.indra.sonatype)
     alias(libs.plugins.indra.git)
     alias(libs.plugins.gitPublish)
+    alias(libs.plugins.ideaExt)
     id 'java-base'
     id 'org.spongepowered.configurate.build.base'
 }
 
+idea.project.settings {
+    delegateActions {
+        delegateBuildRunToGradle = false
+        testRunner = ActionDelegationConfig.TestRunner.PLATFORM
+    }
+}
+
 tasks.named('aggregateJavadoc').configure {
     def gradleJdk = JavaVersion.current()
     // at least java 11, but not 12 (java 12 is broken for some reason :( )

core/src/main/java/org/spongepowered/configurate/util/UnmodifiableCollections.java

@@ -48,7 +48,7 @@ private UnmodifiableCollections() {}
      *
      * @since 4.0.0
      */
-    public static <E> List<E> copyOf(final List<E> original) {
+    public static <E> List<E> copyOf(final List<? extends E> original) {
         switch (original.size()) {
             case 0:
                 return Collections.emptyList();
@@ -67,7 +67,7 @@ public static <E> List<E> copyOf(final List<E> original) {
      * @return a unmodifiable copy of the given {@link Set} instance
      * @since 4.0.0
      */
-    public static <E> Set<E> copyOf(final Set<E> original) {
+    public static <E> Set<E> copyOf(final Set<? extends E> original) {
         switch (original.size()) {
             case 0:
                 return Collections.emptySet();
@@ -87,12 +87,12 @@ public static <E> Set<E> copyOf(final Set<E> original) {
      * @return an unmodifiable copy of the given {@link Map} instance.
      * @since 4.1.0
      */
-    public static <K, V> Map<K, V> copyOf(final Map<K, V> original) {
+    public static <K, V> Map<K, V> copyOf(final Map<? extends K, ? extends V> original) {
         switch (original.size()) {
             case 0:
                 return Collections.emptyMap();
             case 1:
-                final Map.Entry<K, V> entry = original.entrySet().iterator().next();
+                final Map.Entry<? extends K, ? extends V> entry = original.entrySet().iterator().next();
                 return Collections.singletonMap(entry.getKey(), entry.getValue());
             default:
                 if (original instanceof LinkedHashMap<?, ?>) {

core/src/main/java10/org/spongepowered/configurate/util/UnmodifiableCollections.java

@@ -42,7 +42,7 @@ private UnmodifiableCollections() {}
      * @return a unmodifiable copy of the given {@link List} instance
      * @since 4.0.0
      */
-    public static <E> List<E> copyOf(final List<E> original) {
+    public static <E> List<E> copyOf(final List<? extends E> original) {
         return List.copyOf(original);
     }
 
@@ -54,7 +54,7 @@ public static <E> List<E> copyOf(final List<E> original) {
      * @return a unmodifiable copy of the given {@link Set} instance
      * @since 4.0.0
      */
-    public static <E> Set<E> copyOf(final Set<E> original) {
+    public static <E> Set<E> copyOf(final Set<? extends E> original) {
         return Set.copyOf(original);
     }
 

extra/groovy/build.gradle

@@ -0,0 +1,22 @@
+plugins {
+    id 'org.spongepowered.configurate.build.component'
+    id 'groovy'
+}
+
+tasks.processResources {
+    inputs.property("version", project.version)
+    expand version: project.version
+}
+
+dependencies {
+    api projects.core
+
+    [
+        libs.groovy,
+        libs.groovy.nio
+    ].each {
+        implementation variantOf(it) { classifier('indy') }
+    }
+
+    testImplementation variantOf(libs.groovy.test) { classifier('indy') }
+}

extra/groovy/src/main/groovy/org/spongepowered/configurate/extra/groovy/ConfigurationNodeExtensions.groovy

@@ -0,0 +1,38 @@
+/*
+ * Configurate
+ * Copyright (C) zml and Configurate contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.spongepowered.configurate.extra.groovy
+
+import org.spongepowered.configurate.ScopedConfigurationNode;
+
+class ConfigurationNodeExtensions {
+
+    static <N extends ScopedConfigurationNode<N>> N getAt(final ScopedConfigurationNode<N> self, Iterable<?> path) {
+        return self.node(path)
+    }
+
+    static <N extends ScopedConfigurationNode<N>> N getAt(final ScopedConfigurationNode<N> self, Object... path) {
+        return self.node(path)
+    }
+
+    static <N extends ScopedConfigurationNode<N>> boolean isCase(final ScopedConfigurationNode<N> self, Iterable<?> path) {
+        return self.hasChild(path)
+    }
+
+    static <N extends ScopedConfigurationNode<N>> boolean isCase(final ScopedConfigurationNode<N> self, Object... path) {
+        return self.hasChild(path)
+    }
+}

extra/groovy/src/main/groovy/org/spongepowered/configurate/extra/groovy/GStringTypeSerializer.groovy

@@ -0,0 +1,38 @@
+/*
+ * Configurate
+ * Copyright (C) zml and Configurate contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.spongepowered.configurate.extra.groovy
+
+import org.spongepowered.configurate.ConfigurationNode
+import org.spongepowered.configurate.serialize.SerializationException
+import org.spongepowered.configurate.serialize.TypeSerializer
+
+import java.lang.reflect.Type;
+
+class GStringTypeSerializer implements TypeSerializer<GString> {
+
+    @Override
+    GString deserialize(final Type type, final ConfigurationNode node) throws SerializationException {
+        return GString.
+        return null;
+    }
+
+    @Override
+    public void serialize(
+            final Type type, final GString obj, final ConfigurationNode node) throws SerializationException {
+
+    }
+}

extra/groovy/src/main/groovy/org/spongepowered/configurate/extra/groovy/POGOFieldDiscoverer.groovy

@@ -0,0 +1,34 @@
+/*
+ * Configurate
+ * Copyright (C) zml and Configurate contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.spongepowered.configurate.extra.groovy
+
+import io.leangen.geantyref.GenericTypeReflector
+import org.spongepowered.configurate.objectmapping.FieldDiscoverer
+import org.spongepowered.configurate.serialize.SerializationException
+
+import java.lang.reflect.AnnotatedType
+import java.lang.reflect.Field
+
+class POGOFieldDiscoverer implements FieldDiscoverer<Map<String, Field>> {
+
+    @Override
+    def <V> InstanceFactory<Map<String, Field>> discover(final AnnotatedType target, final FieldCollector<Map<String, Field>, V> collector)
+            throws SerializationException {
+        def clazz = GenericTypeReflector.erase(target.type)
+        clazz.metaClass.properties
+    }
+}

extra/groovy/src/main/resources/META-INF/groovy/org.codehause.groovy.runtime.ExtensionModule

@@ -0,0 +1,4 @@
+moduleName=Extensions to configurate for compatibility with the Groovy environment
+moduleVersion=${version}
+extensionClasses=org.spongepowered.configurate.extra.groovy.ConfigurationNodeExtensions
+staticExtensionClasses=

extra/groovy/src/test/groovy/org/spongepowered/configurate/extra/groovy/PogoFieldDiscovererTest.groovy

@@ -0,0 +1,27 @@
+/*
+ * Configurate
+ * Copyright (C) zml and Configurate contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.spongepowered.configurate.extra.groovy
+
+import org.junit.jupiter.api.Test
+
+class PogoFieldDiscovererTest {
+
+    @Test
+    void testPogoFieldDiscoverer() {
+
+    }
+}

format/yaml/build.gradle

@@ -1,6 +1,7 @@
 plugins {
     id 'org.spongepowered.configurate.build.component'
     alias(libs.plugins.shadow)
+    id 'groovy' // for tests
 }
 
 description = "YAML format loader for Configurate"
@@ -12,9 +13,19 @@ configurations {
     testImplementation { extendsFrom shaded }
 }
 
+configurate.useAutoValue()
 dependencies {
     api projects.core
     shaded "configurate.thirdparty:snakeyaml:version-from-submodule"
+
+    [
+        libs.groovy,
+        libs.groovy.nio,
+        libs.groovy.test.junit5,
+        libs.groovy.templates
+    ].each {
+        testImplementation it
+    }
 }
 
 tasks {

format/yaml/src/main/java/org/spongepowered/configurate/yaml/NodeStyle.java

@@ -47,4 +47,17 @@ static DumperOptions.FlowStyle asSnakeYaml(final @Nullable NodeStyle style) {
         return style == null ? DumperOptions.FlowStyle.AUTO : style.snake;
     }
 
+    static @Nullable NodeStyle fromSnakeYaml(final DumperOptions.FlowStyle style) {
+        switch (style) {
+            case AUTO:
+                return null;
+            case BLOCK:
+                return BLOCK;
+            case FLOW:
+                return FLOW;
+            default:
+                throw new IllegalArgumentException("Unknown style " + style);
+        }
+    }
+
 }