StringValidator (GWT Javadoc)

java.lang.Object
- com.google.gwt.http.client.StringValidator

```
final class StringValidator
extends java.lang.Object
```
Utility class for validating strings. TODO(mmendez): Is there a better place for this?

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static boolean`	`isEmptyOrNullString(java.lang.String string)`	Returns true if the string is empty or null.
`static void`	`throwIfEmptyOrNull(java.lang.String name, java.lang.String value)`	Throws if `value` is `null` or empty.
`static void`	`throwIfNull(java.lang.String name, java.lang.Object value)`	Throws a `NullPointerException` if the value is `null`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - isEmptyOrNullString
```
public static boolean isEmptyOrNullString(java.lang.String string)
```
    Returns true if the string is empty or null.
    
    Parameters:
    
    string - to test if null or empty
    
    Returns:
    
    true if the string is empty or null
  - throwIfEmptyOrNull
```
public static void throwIfEmptyOrNull(java.lang.String name,
                                      java.lang.String value)
```
    Throws if value is null or empty. This method ignores leading and trailing whitespace.
    
    Parameters:
    
    name - the name of the value, used in error messages
    
    value - the string value that needs to be validated
    
    Throws:
    
    java.lang.IllegalArgumentException - if the string is empty, or all whitespace
    
    java.lang.NullPointerException - if the string is null
  - throwIfNull
```
public static void throwIfNull(java.lang.String name,
                               java.lang.Object value)
```
    Throws a NullPointerException if the value is null.
    
    Parameters:
    
    name - the name of the value, used in error messages
    
    value - the value that needs to be validated
    
    Throws:
    
    java.lang.NullPointerException - if the value is null