org.assertj.core.util

Class Preconditions

java.lang.Object

org.assertj.core.util.Preconditions

public final class Preconditions
extends java.lang.Object

Verifies correct argument values and state. Borrowed from Guava.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ARGUMENT_EMPTY

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Preconditions()

Method Summary

Modifier and Type	Method and Description
static <T> void	checkNotNull(FilterOperator<T> filterOperator) Verifies that the given FilterOperator reference is not null.
static <T> T	checkNotNull(T reference) Verifies that the given object reference is not null.
static <T> T	checkNotNull(T reference, java.lang.String message) Verifies that the given object reference is not null.
static java.lang.CharSequence	checkNotNullOrEmpty(java.lang.CharSequence s) Verifies that the given CharSequence is not null or empty.
static java.lang.CharSequence	checkNotNullOrEmpty(java.lang.CharSequence s, java.lang.String message) Verifies that the given CharSequence is not null or empty.
static <T> T[]	checkNotNullOrEmpty(T[] array) Verifies that the given array is not null or empty.
private static void	throwExceptionForBeingEmpty()
private static void	throwExceptionForBeingEmpty(java.lang.String message)

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 java.lang.String ARGUMENT_EMPTY

See Also:

Constant Field Values

Constructor Detail

Preconditions

private Preconditions()

Method Detail

checkNotNullOrEmpty

public static java.lang.CharSequence checkNotNullOrEmpty(java.lang.CharSequence s)

Verifies that the given CharSequence is not null or empty.

Parameters:

s - the given CharSequence.

Returns:

the validated CharSequence.

Throws:

java.lang.NullPointerException - if the given CharSequence is null.

java.lang.IllegalArgumentException - if the given CharSequence is empty.

checkNotNullOrEmpty

public static java.lang.CharSequence checkNotNullOrEmpty(java.lang.CharSequence s,
                                                         java.lang.String message)

Verifies that the given CharSequence is not null or empty.

Parameters:

s - the given CharSequence.

message - error message in case of empty String.

Returns:

the validated CharSequence.

Throws:

java.lang.NullPointerException - if the given CharSequence is null.

java.lang.IllegalArgumentException - if the given CharSequence 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:

java.lang.NullPointerException - if the given array is null.

java.lang.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:

java.lang.NullPointerException - if the given object reference is null.

checkNotNull

public static <T> T checkNotNull(T reference,
                                 java.lang.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:

java.lang.NullPointerException - if the given object reference is null.

checkNotNull

public static <T> void checkNotNull(FilterOperator<T> filterOperator)

Verifies that the given FilterOperator reference is not null.

Parameters:

reference - the given object reference.

Throws:

java.lang.NullPointerException - if the given object reference is null.

throwExceptionForBeingEmpty

private static void throwExceptionForBeingEmpty()

throwExceptionForBeingEmpty

private static void throwExceptionForBeingEmpty(java.lang.String message)