org.openpnp.util

Class Collect

java.lang.Object

org.openpnp.util.Collect

public class Collect
extends java.lang.Object

Some basic Collection utilities. Called Collect instead of something like Collections to avoid namespace collisions with java.utils.Collections.

Constructor Summary

Constructors

Constructor and Description
Collect()

Method Summary

Modifier and Type	Method and Description
static <T> java.util.List<java.util.List<T>>	cartesianProduct(java.util.List<java.util.List<T>> lists) Create the cartesian product of a list of lists.
static byte[]	concat(byte[] first, byte[] second) Concatenate two byte arrays.
static <T> T[]	concat(T[] first, T[] second) Concatenate two arrays.

Methods inherited from class java.lang.Object

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

Constructor Detail

Collect

public Collect()

Method Detail

cartesianProduct

public static <T> java.util.List<java.util.List<T>> cartesianProduct(java.util.List<java.util.List<T>> lists)

Create the cartesian product of a list of lists. The results will contain every possible distinct combination of the elements of the input lists. Example: cartesianProduct(Arrays.asList(Arrays.asList("A", "B"), Arrays.asList("1", "2"))) [[A, 1], [A, 2], [B, 1], [B, 2]] This method specifically allows for nulls in the input elements. Multiple nulls will be counted multiple times.

Parameters:

lists -

Returns:

concat

public static <T> T[] concat(T[] first,
                             T[] second)

Concatenate two arrays.

Parameters:

first -

second -

Returns:

concat

public static byte[] concat(byte[] first,
                            byte[] second)

Concatenate two byte arrays.

Parameters:

first -

second -

Returns: