Package com.restfb.util

Class ObjectUtil

java.lang.Object

com.restfb.util.ObjectUtil

public class ObjectUtil
extends Object

Method Summary

Modifier and Type	Method	Description
static boolean	isEmptyCollectionOrMap(Object obj)	Checks is the object is a empty 'collection' or 'map'.
static String	requireNotEmpty(String obj, String errorText)	Ensures that obj isn't null or an empty string.
static void	requireNotEmpty(Collection<?> collection, String errorText)
static <T extends Exception> void	requireNotNull(Object obj, Supplier<T> exceptionSupplier)	Ensures that obj isn't null.
static void	verifyParameterPresence(String parameterName, Object parameter)	Ensures that parameter isn't null.
static void	verifyParameterPresence(String parameterName, String parameter)	Ensures that parameter isn't null or an empty string.

Methods inherited from class java.lang.Object

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

Method Detail

requireNotEmpty

public static String requireNotEmpty(String obj,
                                     String errorText)

Ensures that obj isn't null or an empty string.

Parameters:

obj - The parameter to check.

errorText - The exception message.

Throws:

IllegalArgumentException - If obj is null or an empty string.

requireNotEmpty

public static void requireNotEmpty(Collection<?> collection,
                                   String errorText)

requireNotNull

public static <T extends Exception> void requireNotNull(Object obj,
                                                        Supplier<T> exceptionSupplier)
                                                 throws T extends Exception

Ensures that obj isn't null.

Parameters:

obj - The parameter to check.

exceptionSupplier - The supplier for the exception that is thrown if obj is null.

Throws:

T - If obj is null.

T extends Exception

isEmptyCollectionOrMap

public static boolean isEmptyCollectionOrMap(Object obj)

Checks is the object is a empty 'collection' or 'map'.

Parameters:

obj - the object that is checked

Returns:

true if the given object is a empty collection or an empty map, false otherwise

verifyParameterPresence

public static void verifyParameterPresence(String parameterName,
                                           String parameter)

Ensures that parameter isn't null or an empty string.

Parameters:

parameterName - The name of the parameter (to be used in exception message).

parameter - The parameter to check.

Throws:

IllegalArgumentException - If parameter is null or an empty string.

verifyParameterPresence

public static void verifyParameterPresence(String parameterName,
                                           Object parameter)

Ensures that parameter isn't null.

Parameters:

parameterName - The name of the parameter (to be used in exception message).

parameter - The parameter to check.

Throws:

NullPointerException - If parameter is null.