StringValidator (GWT Javadoc)

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## 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
`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`

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