Package app.babylon.lang

Class ArgumentCheck

java.lang.Object

app.babylon.lang.ArgumentCheck

public final class ArgumentCheck
extends Object

Small argument validation helpers used throughout the library.

Method Summary

Modifier and Type	Method	Description
static String	nonEmpty(String s)	Requires a non-empty string.
static <T extends Collection<?>> T	nonEmpty(T c)	Requires a non-empty collection.
static <T> T[]	nonEmpty(T[] x)	Requires a non-empty array.
static int	nonNegative(int i)	Requires a non-negative integer.
static <T> T	nonNull(T o)	Requires a non-null reference.
static <T> T	nonNull(T o, String message)	Requires a non-null reference with a custom error message.

Methods inherited from class java.lang.Object

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

Method Details

nonNegative

public static int nonNegative(int i)

Requires a non-negative integer.

Parameters:

i - value to validate

Returns:

the supplied value

nonEmpty

public static <T> T[] nonEmpty(T[] x)

Requires a non-empty array.

Type Parameters:

T - array element type

Parameters:

x - array to validate

Returns:

the supplied array

nonEmpty

public static <T extends Collection<?>> T nonEmpty(T c)

Requires a non-empty collection.

Type Parameters:

T - collection type

Parameters:

c - collection to validate

Returns:

the supplied collection

nonEmpty

public static String nonEmpty(String s)

Requires a non-empty string.

Parameters:

s - string to validate

Returns:

the supplied string

nonNull

public static <T> T nonNull(T o)

Requires a non-null reference.

Type Parameters:

T - object type

Parameters:

o - object to validate

Returns:

the supplied object

nonNull

public static <T> T nonNull(T o,
 String message)

Requires a non-null reference with a custom error message.

Type Parameters:

T - object type

Parameters:

o - object to validate

message - null failure message

Returns:

the supplied object