make PutObjectOptions optional for putObject() file upload (#884)

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

@@ -3908,13 +3908,21 @@ public void putObject(
       throw new IllegalArgumentException("empty filename is not allowed");
     }
 
-    if (options == null) {
-      throw new IllegalArgumentException("PutObjectOptions must be provided");
-    }
-
     Path filePath = Paths.get(filename);
     if (!Files.isRegularFile(filePath)) {
-      throw new IllegalArgumentException(filename + ": not a regular file");
+      throw new IllegalArgumentException(filename + " not a regular file");
+    }
+
+    long fileSize = Files.size(filePath);
+    if (options == null) {
+      options = new PutObjectOptions(fileSize, -1);
+    } else if (options.objectSize() != fileSize) {
+      throw new IllegalArgumentException(
+          "file size "
+              + fileSize
+              + " and object size in options "
+              + options.objectSize()
+              + " do not match");
     }
 
     if (options.contentType().equals("application/octet-stream")) {
@@ -3924,15 +3932,6 @@ public void putObject(
       }
     }
 
-    if (options.objectSize() != Files.size(filePath)) {
-      throw new IllegalArgumentException(
-          "file size "
-              + Files.size(filePath)
-              + " and object size in options "
-              + options.objectSize()
-              + " does not match");
-    }
-
     try (RandomAccessFile file = new RandomAccessFile(filePath.toFile(), "r")) {
       putObject(bucketName, objectName, options, file);
     }

functional/FunctionalTest.java

@@ -429,7 +429,7 @@ public static void putObject_test1() throws Exception {
     long startTime = System.currentTimeMillis();
     try {
       String filename = createFile1Kb();
-      client.putObject(bucketName, filename, filename, new PutObjectOptions(1 * KB, -1));
+      client.putObject(bucketName, filename, filename, null);
       Files.delete(Paths.get(filename));
       client.removeObject(bucketName, filename);
       mintSuccessLog(methodName, "filename: 1KB", startTime);