org.meanbean.util

Class ValidationHelper

java.lang.Object

org.meanbean.util.ValidationHelper

public final class ValidationHelper
extends Object

Defines an object that affords helpful input validation functionality.

Author:

Graham Williamson

Constructor Summary

Constructors

Constructor and Description
ValidationHelper()

Method Summary

Modifier and Type	Method and Description
static void	ensure(boolean expr, String msg)
static void	ensureExists(String name, Object value) Ensure that the specified value exists, conditionally throwing an IllegalArgumentException if it does not.
static void	ensureExists(String name, String operation, Object value) Ensure that the specified value exists, conditionally throwing an IllegalArgumentException if it does not.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ValidationHelper

public ValidationHelper()

Method Detail

ensureExists

public static void ensureExists(String name,
                                Object value)
                         throws IllegalArgumentException

Ensure that the specified value exists, conditionally throwing an IllegalArgumentException if it does not.

The exception thrown will contain the name of the parameter that must exist.

Parameters:

name - The name of the object that must exist.

value - The object that must exist.

Throws:

IllegalArgumentException - If the specified value does not exist.

ensureExists

public static void ensureExists(String name,
                                String operation,
                                Object value)
                         throws IllegalArgumentException

Ensure that the specified value exists, conditionally throwing an IllegalArgumentException if it does not.

The exception thrown will contain the name of the parameter that must exist as well as the operation being attempted.

Parameters:

name - The name of the object that must exist.

operation - The operation being attempted.

value - The object that must exist.

Throws:

IllegalArgumentException - If the specified value does not exist.

ensure

public static void ensure(boolean expr,
                          String msg)