Java Utililty Methods Assert Not Null

List of utility methods to do Assert Not Null

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Description

The list of methods to do Assert Not Null are organized into topic(s).

Method

voidassertArgNotNull(final String argName, final Object argValue)
assert Arg Not Null 
if (argValue == null) {
    throw new IllegalArgumentException("Argument '" + argName + "' cannot be null");
voidassertArgNotNull(T obj, String name)
assert Arg Not Null 
if (obj == null) {
    throw new IllegalArgumentException("argument " + name == null ? "" : name + " is null");
TassertArgumentNotNull(T argument, String argumentName)
Throws an IllegalArgumentException if the provided argument is null. 
if (argument == null)
    throw new IllegalArgumentException("Argument cannot be null - '" + argumentName + "'");
return argument;
voidassertElementNotNull(Object element, Class elementClass)
assert Element Not Null 
if (element == null) {
    throw new IllegalArgumentException(elementClass.getName() + " must be set");
voidassertFieldNotNull(Object fieldValue, String fieldName)
Throws an IllegalArgumentException if the specified field is null. 
if (fieldValue == null)
    throw new IllegalArgumentException("Field '" + fieldName + "' cannot be null.");
ObjectassertFormatResultNotNull(Object r)
assert Format Result Not Null 
if (r != null) {
    return r;
throw new NullPointerException("TemplateValueFormatter result can't be null");
voidassertInstanceOfNotNull(Object obj, Class expClass)
Checks if the passed object is of the class specified, null values throw an exception 
if (obj == null) {
    throw new AssertionError(
            "Checking instanceof but object is null, expecting class: " + expClass.getName());
if (!(expClass.isAssignableFrom(obj.getClass()))) {
    throw new AssertionError(
            "Expected class: " + expClass.getName() + " but object has class: " + obj.getClass().getName());
voidassertNotNull(final Object o, final String message)
assert Not Null 
if (o == null)
    throw new NullPointerException(message);
voidassertNotNull(final Object obj, final String msg)
assert Not Null 
if (null == obj) {
    throw new IllegalArgumentException(msg);
voidassertNotNull(final Object obj, final String reference)
assert Not Null 
if (obj == null) {
    throw new IllegalArgumentException(String
            .format("[Assertion failed error. Expected not null reference %s, but got <NULL>]", reference));