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

Modifier and Type	Method and 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