feat: add GraphClientFactory method using TokenCredential

Author: Ndiritu

src/main/java/com/microsoft/graph/core/requests/GraphClientFactory.java

@@ -1,6 +1,8 @@
 package com.microsoft.graph.core.requests;
 
+import com.azure.core.credential.TokenCredential;
 import com.microsoft.graph.core.CoreConstants;
+import com.microsoft.graph.core.authentication.AzureIdentityAccessTokenProvider;
 import com.microsoft.graph.core.requests.middleware.GraphTelemetryHandler;
 import com.microsoft.graph.core.requests.options.GraphClientOption;
 import com.microsoft.kiota.RequestOption;
@@ -51,6 +53,27 @@ public static OkHttpClient.Builder create(@Nonnull final List<Interceptor> inter
         return create(new GraphClientOption(), interceptors.toArray(new Interceptor[0]));
     }
 
+    /**
+     * OkHttpClient Builder for Graph with authentication middleware that uses the specified TokenCredential.
+     * @param tokenCredential the TokenCredential to use for authentication.
+     * @return an OkHttpClient Builder instance.
+     */
+    @Nonnull
+    public static OkHttpClient.Builder create(@Nonnull final TokenCredential tokenCredential) {
+        return create(tokenCredential, new RequestOption[0]);
+    }
+
+    /**
+     * OkHttpClient Builder for Graph with authentication middleware that uses the specified TokenCredential and RequestOptions to override default graph interceptors.
+     * @param tokenCredential the TokenCredential to use for authentication.
+     * @param requestOptions custom request options to override default graph interceptors
+     * @return an OkHttpClient Builder instance.
+     */
+    @Nonnull
+    public static OkHttpClient.Builder create(@Nonnull final TokenCredential tokenCredential, @Nonnull final RequestOption[] requestOptions) {
+        return create(new BaseBearerTokenAuthenticationProvider(new AzureIdentityAccessTokenProvider(tokenCredential)), requestOptions);
+    }
+
     /**
      * OkHttpClient Builder for Graph with specified AuthenticationProvider.
      * Adds an AuthorizationHandler to the OkHttpClient Builder.

src/test/java/com/microsoft/graph/core/requests/GraphClientFactoryTest.java

@@ -19,6 +19,8 @@
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import com.azure.core.credential.AccessToken;
+import com.azure.core.credential.TokenCredential;
 import com.microsoft.graph.core.authentication.AzureIdentityAccessTokenProvider;
 import com.microsoft.graph.core.authentication.AzureIdentityAuthenticationProvider;
 import com.microsoft.graph.core.requests.middleware.GraphTelemetryHandler;
@@ -39,6 +41,7 @@
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;
+import reactor.core.publisher.Mono;
 
 class GraphClientFactoryTest {
 
@@ -104,6 +107,22 @@ void testCreateWithAuthenticationProvider() throws IOException {
         assertEquals("Bearer " + ACCESS_TOKEN_STRING, response.request().header("Authorization"));
     }
 
+    @Test
+    void testCreateWithTokenCredential() throws IOException {
+        final TokenCredential tokenCredential = mock(TokenCredential.class);
+        when(tokenCredential.getTokenSync(any())).thenReturn(new AccessToken(ACCESS_TOKEN_STRING, null));
+        when(tokenCredential.getToken(any())).thenReturn(Mono.just(new AccessToken(ACCESS_TOKEN_STRING, null)));
+
+        final OkHttpClient graphClient = GraphClientFactory.create(tokenCredential).addInterceptor(new MockResponseHandler()).build();
+        Request request = new Request.Builder().url("https://graph.microsoft.com/v1.0/me").build();
+        Response response = graphClient.newCall(request).execute();
+
+        assertEquals(200, response.code());
+        assertNotNull(response.request());
+        assertTrue(response.request().headers().names().contains("Authorization"));
+        assertEquals("Bearer " + ACCESS_TOKEN_STRING, response.request().header("Authorization"));
+    }
+
     @Test
     void testCreateWithAuthenticationProviderAndCustomRequestOptions() throws IOException {
         final BaseBearerTokenAuthenticationProvider mockAuthenticationProvider =