org.assertj.core.util
Class Preconditions

java.lang.Object
  org.assertj.core.util.Preconditions

public final class Preconditions
extends Object

Verifies correct argument values and state. Borrowed from Guava.

Author:

alruiz@google.com (Alex Ruiz)

Field Summary

static String

ARGUMENT_EMPTY

Method Summary

static <T> T	checkNotNull(T reference) Verifies that the given object reference is not null.
static <T> T	checkNotNull(T reference, String message) Verifies that the given object reference is not null.
static String	checkNotNullOrEmpty(String s) Verifies that the given String is not null or empty.
static String	checkNotNullOrEmpty(String s, String message) Verifies that the given String is not null or empty.
static <T> T[]	checkNotNullOrEmpty(T[] array) Verifies that the given array is not null or empty.

Methods inherited from class java.lang.Object

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

Field Detail

ARGUMENT_EMPTY

public static final String ARGUMENT_EMPTY

See Also:

Constant Field Values

Method Detail

checkNotNullOrEmpty

public static String checkNotNullOrEmpty(String s)

Verifies that the given String is not null or empty.

Parameters:

s - the given String.

Returns:

the validated String.

Throws:

NullPointerException - if the given String is null.

IllegalArgumentException - if the given String is empty.

checkNotNullOrEmpty

public static String checkNotNullOrEmpty(String s,
                                         String message)

Verifies that the given String is not null or empty.

Parameters:

s - the given String.

message - error message in case of empty String.

Returns:

the validated String.

Throws:

NullPointerException - if the given String is null.

IllegalArgumentException - if the given String is empty.

checkNotNullOrEmpty

public static <T> T[] checkNotNullOrEmpty(T[] array)

Verifies that the given array is not null or empty.

Parameters:

array - the given array.

Returns:

the validated array.

Throws:

NullPointerException - if the given array is null.

IllegalArgumentException - if the given array is empty.

checkNotNull

public static <T> T checkNotNull(T reference)

Verifies that the given object reference is not null.

Parameters:

reference - the given object reference.

Returns:

the non-null reference that was validated.

Throws:

NullPointerException - if the given object reference is null.

checkNotNull

public static <T> T checkNotNull(T reference,
                                 String message)

Verifies that the given object reference is not null.

Parameters:

reference - the given object reference.

message - error message in case of null reference.

Returns:

the non-null reference that was validated.

Throws:

NullPointerException - if the given object reference is null.