fluent.validation.data

Class Data

java.lang.Object

fluent.validation.data.Data

public class Data
extends Object

Helper methods for generating combinations of data (typically test data). The class provides rather partial helper methods to be used with Java 8 streams in order to get stream of data, produced as combination of all provided subsets. So by applying these helpers with collections on the input stream, we get new stream, which contains all combinations of every input element with every item from the provided collection. Combination of multiple collections can be achieved by simple chaining: A.stream().flatMap(combineWith(B)).flatMap(combineWith(C)).iterator();

Constructor Summary

Constructors

Constructor and Description
Data()

Method Summary

Modifier and Type	Method and Description
static <A,B,C> Function<A,Stream<C>>	combineWith(Collection<B> collection, BiFunction<A,B,C> byFunction) Totally general algorithm to combine potentially typesafe heterogeneous input data collections into a structured representation of combination of their elements.
static Function<Object[],Stream<Object[]>>	combineWith(Collection<Object[]> collection) Simple function to combine original stream of arrays with elements in provided collection of arrays so, that arrays are concatenated into new one.
static Stream<Object[]>	expand(Stream<Object[]> definition) Expansion algorithm allowing definition of data as sparse array representing a tree.

Methods inherited from class java.lang.Object

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

Constructor Detail

Data

public Data()

Method Detail

combineWith

public static <A,B,C> Function<A,Stream<C>> combineWith(Collection<B> collection,
                                                        BiFunction<A,B,C> byFunction)

Totally general algorithm to combine potentially typesafe heterogeneous input data collections into a structured representation of combination of their elements.

Type Parameters:

A - Type of elements in original (input) stream.

B - Type of elements in the collection to combine with.

C - Type of the representation of a combination.

Parameters:

collection - Collection to combine ev

byFunction - Function to create representation of the combination o element from original stream, and element from the collection.

Returns:

Function, that implements the combination, to be used as parameter of input stream's flatMap() method.

combineWith

public static Function<Object[],Stream<Object[]>> combineWith(Collection<Object[]> collection)

Simple function to combine original stream of arrays with elements in provided collection of arrays so, that arrays are concatenated into new one.

Parameters:

collection - Collection of arrays.

Returns:

Implementation of combination of original stream with provided collection.

expand

public static Stream<Object[]> expand(Stream<Object[]> definition)

Expansion algorithm allowing definition of data as sparse array representing a tree. Sparse array definition is missing leading elements, which are common with previous records.

Parameters:

definition - Stream of data rows represented as sparse array.

Returns:

Stream of records expanded to full length.