Top Description Constructors Methods
org.assertj.core.groups

public Class FieldsOrPropertiesExtractor

extends Object
Class Inheritance
Static Imports
java.util.stream.Collectors.toList, org.assertj.core.util.IterableUtil.toArray, .Lists.newArrayList, .Streams.stream
Understands how to retrieve fields or values from a collection/array of objects.

You just have to give the field/property name or a Function implementation, a collection/array of objects and it will extract the list of field/values from the given objects.

Authors
Joel Costigliola, Mateusz Haligowski

Constructor Summary

AccessConstructor and Description
public
FieldsOrPropertiesExtractor()

Method Summary

Modifier and TypeMethod and Description
private static void
checkObjectToExtractFromIsNotNull(Object object)

public static <
type of elements to extract a value from
F,
the extracted value type
T> T[]

Returns:

the extracted values
extract(F[]
the elements to extract a value from
objects, Function<? super F, T>
the extractor function
extractor)

Call extract(Iterable, Function) after converting objects to an iterable.

public static <
type of elements to extract a value from
F,
the extracted value type
T> List<T>

Returns:

the extracted values
extract(Iterable<? extends F>
the elements to extract a value from
objects, Function<? super F, T>
the extractor function
extractor)

Behavior is described in AbstractIterableAssert#extracting(Function)

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Constructor Detail

FieldsOrPropertiesExtractorback to summary
public FieldsOrPropertiesExtractor()

Method Detail

checkObjectToExtractFromIsNotNullback to summary
private static void checkObjectToExtractFromIsNotNull(Object object)
extractback to summary
public static <F, T> T[] extract(F[] objects, Function<? super F, T> extractor)

Call extract(Iterable, Function) after converting objects to an iterable.

Behavior is described in javadoc AbstractObjectArrayAssert#extracting(Function)

Parameters
<F>
type of elements to extract a value from
<T>
the extracted value type
objects:F[]

the elements to extract a value from

extractor:Function<? super F, T>

the extractor function

Returns:T[]

the extracted values

extractback to summary
public static <F, T> List<T> extract(Iterable<? extends F> objects, Function<? super F, T> extractor)

Behavior is described in AbstractIterableAssert#extracting(Function)

Parameters
<F>
type of elements to extract a value from
<T>
the extracted value type
objects:Iterable<? extends F>

the elements to extract a value from

extractor:Function<? super F, T>

the extractor function

Returns:List<T>

the extracted values