StringValidator (GWT Javadoc)

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GWT 2.7.0

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com.google.gwt.http.client
Class StringValidator

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

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

public static boolean isEmptyOrNullString(java.lang.String string)

Returns true if the string is empty or null.

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

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