code formatting and updating comments, descriptions

components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/bean/FileTransfer.java

@@ -47,7 +47,6 @@ public class FileTransfer extends AndroidOperation implements Serializable {
         this.fileURL = fileURL;
     }
 
-
     public String getFtpPassword() {
         return ftpPassword;
     }

components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/DeviceManagementAdminService.java

@@ -233,7 +233,8 @@ public interface DeviceManagementAdminService {
             consumes = MediaType.APPLICATION_JSON,
             httpMethod = "POST",
             value = "Transferring file to the device.",
-            notes = "Using this API you have the option to transfer a file from FTP server to an Android device.",
+            notes = "Using this API you have the option to transfer a file from SFTP/FTP server or using an " +
+                    "HTTP link to the device or retrieve file from the device to FTP/SFTP server .",
             response = Activity.class,
             tags = "Android Device Management Administrative Service",
             extensions = {
@@ -245,7 +246,6 @@ public interface DeviceManagementAdminService {
     @ApiResponses(value = {
             @ApiResponse(
                     code = 201,
-                    //todo
                     message = "File transferred.",
                     response = Activity.class,
                     responseHeaders = {
@@ -284,7 +284,8 @@ public interface DeviceManagementAdminService {
     Response fileTransfer(
             @ApiParam(
                     name = "fileTransfer",
-                    value = "Provide the ID of the Android device. Multiple device IDs can be added by using comma separated values.",
+                    value = "Provide the ID of the Android device. Multiple device IDs can be added by using " +
+                            "comma separated values.",
                     required = true) FileTransferBeanWrapper fileTransferBeanWrapper);
 
     @POST

components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/impl/DeviceManagementAdminServiceImpl.java

@@ -94,17 +94,16 @@ public class DeviceManagementAdminServiceImpl implements DeviceManagementAdminSe
     @Path("/file-transfer")
     @Override
     public Response fileTransfer(FileTransferBeanWrapper fileTransferBeanWrapper) {
-        if (log.isDebugEnabled()) {
+         try {
-            log.debug("Invoking Android file transfer operation for " + fileTransferBeanWrapper.getDeviceIDs());
+             if (fileTransferBeanWrapper == null || fileTransferBeanWrapper.getOperation() == null) {
-        }
+                 String errorMessage = "The payload of the file transfer operation is incorrect.";
-
+                 log.error(errorMessage);
-        try {
+                 throw new BadRequestException(
-            if (fileTransferBeanWrapper == null || fileTransferBeanWrapper.getOperation() == null) {
+                         new ErrorResponse.ErrorResponseBuilder().setCode(400l).setMessage(errorMessage).build());
-                String errorMessage = "The payload of the file transfer operation is incorrect.";
+             }
-                log.error(errorMessage);
+             if (fileTransferBeanWrapper.getDeviceIDs() != null && log.isDebugEnabled()) {
-                throw new BadRequestException(
+                 log.debug("Invoking Android file transfer operation for " + fileTransferBeanWrapper.getDeviceIDs());
-                        new ErrorResponse.ErrorResponseBuilder().setCode(400l).setMessage(errorMessage).build());
+             }
-            }
             FileTransfer file = fileTransferBeanWrapper.getOperation();
             ProfileOperation operation = new ProfileOperation();
             if (fileTransferBeanWrapper.isUpload()) {

components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.ui/src/main/resources/jaggeryapps/devicemgt/app/units/cdmf.unit.device.type.android.operation-bar/public/js/operation-bar.js

@@ -32,6 +32,11 @@ var resetLoader = function () {
     $('#lbl-execution').addClass("hidden");
 };
 
+/**
+ * This changes the text box label when the operation is toggled between FILE UPLOAD and FILE DOWNLOAD
+ * and shows an info label for FILE UPLOAD regarding saving location.
+ * @param type
+ */
 function changeLabel(type) {
     $(".modal #operation-error-msg").addClass("hidden");
     if (type == "no") {