FieldVerifier (gCube File Upload Progress Bar Widget 2.0.0-SNAPSHOT API)

java.lang.Object
- org.gcube.portlets.widgets.fileupload.shared.FieldVerifier

```
public class FieldVerifier
extends Object
```
FieldVerifier validates that the name the user enters is valid.

This class is in the shared packing because we use it in both the client code and on the server. On the client, we verify that the name is valid before sending an RPC request so the user doesn't have to wait for a network round trip to get feedback. On the server, we verify that the name is correct to ensure that the input is correct regardless of where the RPC originates.

When creating a class that is used on both the client and the server, be sure that all code is translatable and does not use native JavaScript. Code that is note translatable (such as code that interacts with a database or the file system) cannot be compiled into client side JavaScript. Code that uses native JavaScript (such as Widgets) cannot be run on the server.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  FieldVerifier()
- Method Summary
  
  All Methods Static Methods Concrete Methods
  Modifier and Type Method Description
  
  static boolean isValidName(String name)
  Verifies that the specified name is valid for our service.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FieldVerifier
```
public FieldVerifier()
```
- Method Detail
  - isValidName
```
public static boolean isValidName(String name)
```
    Verifies that the specified name is valid for our service. In this example, we only require that the name is at least four characters. In your application, you can use more complex checks to ensure that usernames, passwords, email addresses, URLs, and other fields have the proper syntax.
    
    Parameters:
    
    name - the name to validate
    
    Returns:
    
    true if valid, false if invalid