feat: remove kotlin

build.gradle

@@ -1,13 +1,8 @@
 import com.android.build.gradle.BaseExtension
-import org.jetbrains.kotlin.gradle.dsl.JvmTarget
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext {
-        kotlin_version = '2.2.0'
-    }
     repositories {
         mavenCentral()
         google()
@@ -18,7 +13,6 @@ buildscript {
         // For displaying method/field counts when building with Gradle:
         // https://github.com/KeepSafe/dexcount-gradle-plugin
         classpath("com.getkeepsafe.dexcount:dexcount-gradle-plugin:4.0.0")
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -76,11 +70,6 @@ subprojects { subproject ->
     plugins.withId("com.android.library") {
         configureAndroidModule(subproject)
     }
-    tasks.withType(KotlinCompile).configureEach {
-        compilerOptions {
-            jvmTarget = JvmTarget.JVM_1_8
-        }
-    }
     tasks.withType(JavaCompile).configureEach {
         // enable deprecation checks
         options.compilerArgs += "-Xlint:deprecation"

contract-tests/build.gradle

@@ -2,7 +2,6 @@ plugins {
     id("com.android.application")
     // make sure this line comes *after* you apply the Android plugin
     id("com.getkeepsafe.dexcount")
-    id 'org.jetbrains.kotlin.android'
 }
 
 android {

example/build.gradle

@@ -2,7 +2,6 @@ plugins {
     id("com.android.application")
     // make sure this line comes *after* you apply the Android plugin
     id("com.getkeepsafe.dexcount")
-    id 'org.jetbrains.kotlin.android'
 }
 
 android {

launchdarkly-android-client-sdk/build.gradle

@@ -3,7 +3,6 @@ plugins {
     id("signing")
     id("maven-publish")
     id("com.getkeepsafe.dexcount")
-    id 'org.jetbrains.kotlin.android'
 }
 
 group = "com.launchdarkly"

launchdarkly-android-client-sdk/src/main/java/com/launchdarkly/sdk/android/integrations/RegistrationCompleteResult.java

@@ -0,0 +1,137 @@
+package com.launchdarkly.sdk.android.integrations;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Result of attempting to register all configured {@link Plugin}s during SDK initialization.
+ *
+ * <p>This is a closed type hierarchy with exactly two subtypes: {@link Success} and {@link Failure}.
+ */
+public abstract class RegistrationCompleteResult {
+
+    private RegistrationCompleteResult() {
+        // sealed: only the nested subtypes may extend this class.
+    }
+
+    /**
+     * @return a {@link Success} result indicating that every plugin registered without error.
+     */
+    @NonNull
+    public static RegistrationCompleteResult success() {
+        return Success.INSTANCE;
+    }
+
+    /**
+     * @param failures the per-plugin failures collected during registration; must be non-null.
+     * @return a {@link Failure} result wrapping the supplied failures.
+     */
+    @NonNull
+    public static RegistrationCompleteResult failure(@NonNull List<Failure.PluginFailure> failures) {
+        return new Failure(failures);
+    }
+
+    /**
+     * Indicates that all plugins registered successfully.
+     */
+    public static final class Success extends RegistrationCompleteResult {
+        /** The single instance. */
+        public static final Success INSTANCE = new Success();
+
+        private Success() {}
+
+        @Override public boolean equals(Object other) { return other instanceof Success; }
+        @Override public int hashCode() { return Success.class.hashCode(); }
+        @Override public String toString() { return "Success"; }
+    }
+
+    /**
+     * Indicates that one or more plugins failed to register. The wrapped list contains
+     * the failure details for each plugin that threw during registration.
+     */
+    public static final class Failure extends RegistrationCompleteResult {
+        @NonNull private final List<PluginFailure> failures;
+
+        public Failure(@NonNull List<PluginFailure> failures) {
+            this.failures = Collections.unmodifiableList(failures);
+        }
+
+        @NonNull
+        public List<PluginFailure> getFailures() {
+            return failures;
+        }
+
+        @Override
+        public boolean equals(Object other) {
+            if (this == other) return true;
+            if (!(other instanceof Failure)) return false;
+            return failures.equals(((Failure) other).failures);
+        }
+
+        @Override
+        public int hashCode() {
+            return failures.hashCode();
+        }
+
+        @Override
+        public String toString() {
+            return "Failure(failures=" + failures + ")";
+        }
+
+        /**
+         * Details about a single plugin's registration failure.
+         */
+        public static final class PluginFailure {
+            @NonNull private final String pluginName;
+            @Nullable private final String message;
+            @Nullable private final Throwable cause;
+
+            public PluginFailure(@NonNull String pluginName, @Nullable String message, @Nullable Throwable cause) {
+                this.pluginName = pluginName;
+                this.message = message;
+                this.cause = cause;
+            }
+
+            @NonNull
+            public String getPluginName() {
+                return pluginName;
+            }
+
+            @Nullable
+            public String getMessage() {
+                return message;
+            }
+
+            @Nullable
+            public Throwable getCause() {
+                return cause;
+            }
+
+            @Override
+            public boolean equals(Object other) {
+                if (this == other) return true;
+                if (!(other instanceof PluginFailure)) return false;
+                PluginFailure that = (PluginFailure) other;
+                return pluginName.equals(that.pluginName)
+                        && Objects.equals(message, that.message)
+                        && Objects.equals(cause, that.cause);
+            }
+
+            @Override
+            public int hashCode() {
+                return Objects.hash(pluginName, message, cause);
+            }
+
+            @Override
+            public String toString() {
+                return "PluginFailure(pluginName=" + pluginName
+                        + ", message=" + message
+                        + ", cause=" + cause + ")";
+            }
+        }
+    }
+}

shared-test-code/build.gradle

@@ -1,7 +1,6 @@
 plugins {
     id("com.android.library")
     id("com.getkeepsafe.dexcount")
-    id 'org.jetbrains.kotlin.android'
 }
 
 group = "com.launchdarkly"