Package cdc.validation.checkers.defaults

Class IsNull

java.lang.Object

cdc.validation.checkers.defaults.IsNull

All Implemented Interfaces:

Checker<Object>, Predicate<Object>

public final class IsNull
extends Object
implements Checker<Object>

Implementation o Checker that checks that an object is null.

Field Summary

Fields

Modifier and Type	Field	Description
static final Factory<IsNull>	FACTORY
static final IsNull	INSTANCE

Fields inherited from interface cdc.validation.checkers.Checker

DEFAULT_ARG_NAME

Constructor Summary

Constructors

Constructor	Description
IsNull()

Method Summary

Modifier and Type	Method	Description
String	explain(boolean result, String arg)	Explains the conditions at which a positive or negative result is obtained.
Class<Object>	getValueClass()
boolean	test(Object value)

Methods inherited from class java.lang.Object

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

Methods inherited from interface cdc.validation.checkers.Checker

after, after, afterRaw, and, andRaw, cast, cast, explain, explain, negate, or, orRaw, testAndExplain, testAndExplain, testAndExplainRaw, testAndExplainRaw, testRaw, wrap

Methods inherited from interface java.util.function.Predicate

and, or

Field Details

INSTANCE

public static final IsNull INSTANCE

FACTORY

public static final Factory<IsNull> FACTORY

Constructor Details

IsNull

public IsNull()

Method Details

getValueClass

public Class<Object> getValueClass()

Specified by:

getValueClass in interface Checker<Object>

Returns:

The class of tested values.

test

public boolean test(Object value)

Specified by:

test in interface Checker<Object>

Specified by:

test in interface Predicate<Object>

explain

public String explain(boolean result,
 String arg)

Description copied from interface: Checker

Explains the conditions at which a positive or negative result is obtained.

Specified by:

explain in interface Checker<Object>

Parameters:

result - The result to explain.

arg - The argument name to use in explanations.

Returns:

A string explaining the conditions leading to result.