team.unnamed.inject.util

Class Validate

java.lang.Object

team.unnamed.inject.util.Validate

public final class Validate
extends java.lang.Object

Collection of util methods for parameter, argument, states validation.

Created for code shortening and for making legible code. Make fail-fast methods.

Method Summary

Modifier and Type	Method and Description
static void	argument(boolean expression) Validates that the specified expression is true, if it is false, the method throws a IllegalArgumentException
static void	argument(boolean expression, java.lang.String message, java.lang.Object... parameters) Validates that the specified expression is true, if it is false, the method throws a IllegalArgumentException with the specified message
static <T> void	doesntRequiresContext(Key<T> key)
static java.lang.String	notEmpty(java.lang.String string) Validates that the specified string is not null and not empty.
static java.lang.String	notEmpty(java.lang.String string, java.lang.String message, java.lang.Object... parameters) Validates that the specified string is not null and not empty.
static <T> T	notNull(T object) Validates that the provided object isn't null, if it is, the method throws an NullPointerException
static <T> T	notNull(T object, java.lang.String message, java.lang.Object... parameters) Validates that the provided object isn't null, if it is, the method throws an NullPointerException with the specified message.
static void	state(boolean expression) Validates that the specified expression is true, if it is false, the method throws a IllegalStateException
static void	state(boolean expression, java.lang.String message, java.lang.Object... parameters) Validates that the specified expression is true, if it is false, the method throws a IllegalStateException with the specified message.

Methods inherited from class java.lang.Object

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

Method Detail

notNull

public static <T> T notNull(T object,
                            java.lang.String message,
                            java.lang.Object... parameters)

Validates that the provided object isn't null, if it is, the method throws an NullPointerException with the specified message.

Type Parameters:

T - The type of the checked object

Parameters:

object - The checked object

message - The exception message

parameters - Parameters for the message, message is formatted using String.format(java.lang.String, java.lang.Object...).

Returns:

The object, never null

Throws:

java.lang.NullPointerException - if object is null

notNull

public static <T> T notNull(T object)

Validates that the provided object isn't null, if it is, the method throws an NullPointerException

Type Parameters:

T - The type of the checked object

Parameters:

object - The checked object

Returns:

The object, never null

Throws:

java.lang.NullPointerException - if object is null

state

public static void state(boolean expression,
                         java.lang.String message,
                         java.lang.Object... parameters)

Validates that the specified expression is true, if it is false, the method throws a IllegalStateException with the specified message.

Parameters:

expression - The checked expression

message - The message for the thrown exception

parameters - The parameters for the exception message. The message is formatted using String.format(java.lang.String, java.lang.Object...).

Throws:

java.lang.IllegalStateException - If expression is false

state

public static void state(boolean expression)

Validates that the specified expression is true, if it is false, the method throws a IllegalStateException

Parameters:

expression - The checked expression

Throws:

java.lang.IllegalStateException - If expression is false

argument

public static void argument(boolean expression,
                            java.lang.String message,
                            java.lang.Object... parameters)

Validates that the specified expression is true, if it is false, the method throws a IllegalArgumentException with the specified message

Parameters:

expression - The checked expression

message - The message for the thrown exception

parameters - The parameters for the exception message. The message is formatted using String.format(java.lang.String, java.lang.Object...).

Throws:

java.lang.IllegalArgumentException - If expression is false

argument

public static void argument(boolean expression)

Validates that the specified expression is true, if it is false, the method throws a IllegalArgumentException

Parameters:

expression - The checked expression

Throws:

java.lang.IllegalArgumentException - If expression is false

notEmpty

public static java.lang.String notEmpty(java.lang.String string,
                                        java.lang.String message,
                                        java.lang.Object... parameters)

Validates that the specified string is not null and not empty. If the string is null, throws a NullPointerException, if the string is empty, throws a IllegalArgumentException.

Parameters:

string - The checked string

message - The message used for the messages

parameters - The parameters for the exception message. The message is formatted using String.format(java.lang.String, java.lang.Object...).

Returns:

The string, not null and not empty

Throws:

java.lang.NullPointerException - if the string is null

java.lang.IllegalArgumentException - If the string is empty

notEmpty

public static java.lang.String notEmpty(java.lang.String string)

Validates that the specified string is not null and not empty. If the string is null, throws a NullPointerException, if the string is empty, throws a IllegalArgumentException.

Parameters:

string - The checked string

Returns:

The string, not null and not empty

Throws:

java.lang.NullPointerException - if the string is null

java.lang.IllegalArgumentException - If the string is empty

doesntRequiresContext

public static <T> void doesntRequiresContext(Key<T> key)