Return higher level object GetObjectResponse for getObject API

api/src/main/java/io/minio/GenericResponse.java

@@ -19,7 +19,7 @@
 import okhttp3.Headers;
 
 /** Generic response class of any APIs. */
-public abstract class GenericResponse {
+public class GenericResponse {
   private Headers headers;
   private String bucket;
   private String region;

api/src/main/java/io/minio/GetObjectResponse.java

@@ -0,0 +1,47 @@
+/*
+ * MinIO Java SDK for Amazon S3 Compatible Cloud Storage, (C) 2020 MinIO, Inc.
+ *
+ * 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 io.minio;
+
+import java.io.FilterInputStream;
+import java.io.InputStream;
+import okhttp3.Headers;
+
+public class GetObjectResponse extends FilterInputStream {
+  private GenericResponse response;
+
+  public GetObjectResponse(
+      Headers headers, String bucket, String region, String object, InputStream body) {
+    super(body);
+    this.response = new GenericResponse(headers, bucket, region, object);
+  }
+
+  public Headers headers() {
+    return response.headers();
+  }
+
+  public String bucket() {
+    return response.bucket();
+  }
+
+  public String region() {
+    return response.region();
+  }
+
+  public String object() {
+    return response.object();
+  }
+}

api/src/main/java/io/minio/MinioClient.java

@@ -1666,7 +1666,7 @@ public InputStream getObject(
    * @throws NoSuchAlgorithmException thrown to indicate missing of MD5 or SHA-256 digest library.
    * @throws XmlParserException thrown to indicate XML parsing error.
    */
-  public InputStream getObject(GetObjectArgs args)
+  public GetObjectResponse getObject(GetObjectArgs args)
       throws ErrorResponseException, IllegalArgumentException, InsufficientDataException,
           InternalException, InvalidBucketNameException, InvalidKeyException,
           InvalidResponseException, IOException, NoSuchAlgorithmException, ServerException,
@@ -1695,7 +1695,12 @@ public InputStream getObject(GetObjectArgs args)
     if (args.versionId() != null) queryParams.put("versionId", args.versionId());
 
     Response response = executeGet(args, headers, queryParams);
-    return response.body().byteStream();
+    return new GetObjectResponse(
+        response.headers(),
+        args.bucket(),
+        args.region(),
+        args.object(),
+        response.body().byteStream());
   }
 
   /**