Package com.google.gwt.http.client

## Class StringValidator

- 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`