refactor: move OpenFeatureAPIFactory to sdk package and remove createIsolated()

Signed-off-by: marcozabel <marco.zabel@dynatrace.com>

Author: marcozabel

src/main/java/dev/openfeature/sdk/OpenFeatureAPI.java

@@ -56,24 +56,6 @@ public static OpenFeatureAPI getInstance() {
         return SingletonHolder.INSTANCE;
     }
 
-    /**
-     * Creates a new, independent {@link OpenFeatureAPI} instance with fully
-     * isolated state.
-     *
-     * <p>Each instance maintains its own providers, evaluation context, hooks,
-     * event handlers, and transaction context propagators. Instances do not
-     * share state with the global singleton or with each other.
-     *
-     * <p>For better discoverability, prefer using
-     * {@link dev.openfeature.sdk.isolated.OpenFeatureAPIFactory#createAPI()}.
-     *
-     * @return a new API instance
-     * @see dev.openfeature.sdk.isolated.OpenFeatureAPIFactory#createAPI()
-     */
-    public static OpenFeatureAPI createIsolated() {
-        return new OpenFeatureAPI();
-    }
-
     /**
      * Get metadata about the default provider.
      *

…/sdk/isolated/OpenFeatureAPIFactory.java …enfeature/sdk/OpenFeatureAPIFactory.javasrc/main/java/dev/openfeature/sdk/isolated/OpenFeatureAPIFactory.java renamed to src/main/java/dev/openfeature/sdk/OpenFeatureAPIFactory.java src/main/java/dev/openfeature/sdk/isolated/OpenFeatureAPIFactory.java renamed to src/main/java/dev/openfeature/sdk/OpenFeatureAPIFactory.java

@@ -1,6 +1,4 @@
-package dev.openfeature.sdk.isolated;
-
-import dev.openfeature.sdk.OpenFeatureAPI;
+package dev.openfeature.sdk;
 
 /**
  * Factory for creating isolated OpenFeature API instances.
@@ -16,7 +14,6 @@
  * <p><strong>Spec references:</strong>
  * <ul>
  *   <li>Requirement 1.8.1 &mdash; factory function for isolated instances</li>
- *   <li>Requirement 1.8.3 &mdash; distinct package for discoverability</li>
  * </ul>
  *
  * @see <a href="https://openfeature.dev/specification/sections/flag-evaluation#18-isolated-api-instances">
@@ -40,9 +37,8 @@ private OpenFeatureAPIFactory() {
      * }</pre>
      *
      * @return a new API instance
-     * @see OpenFeatureAPI#createIsolated()
      */
     public static OpenFeatureAPI createAPI() {
-        return OpenFeatureAPI.createIsolated();
+        return new OpenFeatureAPI();
     }
 }

src/test/java/dev/openfeature/sdk/isolated/IsolatedAPISingeltonTest.java

@@ -6,6 +6,7 @@
 import dev.openfeature.sdk.ImmutableContext;
 import dev.openfeature.sdk.NoOpTransactionContextPropagator;
 import dev.openfeature.sdk.OpenFeatureAPI;
+import dev.openfeature.sdk.OpenFeatureAPIFactory;
 import dev.openfeature.sdk.providers.memory.InMemoryProvider;
 import java.util.Map;
 import org.junit.jupiter.api.AfterEach;

src/test/java/dev/openfeature/sdk/isolated/IsolatedAPITest.java

@@ -6,6 +6,7 @@
 import dev.openfeature.sdk.NoOpProvider;
 import dev.openfeature.sdk.NoOpTransactionContextPropagator;
 import dev.openfeature.sdk.OpenFeatureAPI;
+import dev.openfeature.sdk.OpenFeatureAPIFactory;
 import dev.openfeature.sdk.ThreadLocalTransactionContextPropagator;
 import dev.openfeature.sdk.providers.memory.Flag;
 import dev.openfeature.sdk.providers.memory.InMemoryProvider;