Class ArrayFunctionUtils

java.lang.Object

com.flowable.platform.common.el.collection.ArrayFunctionUtils

public class ArrayFunctionUtils
extends Object

Utility methods for array/collection operations using standard Java functional interfaces. Used by the flw.array EL resolver which wraps EL-specific types (like LambdaExpression) into Predicate, Function, and BiFunction before calling these methods.

Author:

Tijs Rademakers

Constructor Summary

Constructors

Constructor	Description
ArrayFunctionUtils()

Method Summary

Modifier and Type	Method	Description
static boolean	all(Object collection, Predicate<Object> predicate)
static boolean	any(Object collection, Predicate<Object> predicate)
static Object	append(Object collection, List<Object> items)
static Object	compact(Object collection)
static Object	concat(Object collection1, Object collection2)
static long	count(Object collection, Predicate<Object> predicate)
static Object	filter(Object collection, Predicate<Object> predicate)
static Object	find(Object collection, Predicate<Object> predicate)
static Object	first(Object collection)
static Object	flatMap(Object collection, Function<Object,Object> mapper)
static boolean	includes(Object collection, Object value)
static long	indexOf(Object collection, Predicate<Object> predicate)
static boolean	isEmpty(Object collection)
static boolean	isEqual(Object a, Object b)
static Object	last(Object collection)
static Object	map(Object collection, Function<Object,Object> mapper)
static boolean	none(Object collection, Predicate<Object> predicate)
static Object	pick(Object collection, List<String> propertyNames, Function<Object, Function<String,Object>> propertyResolver)
static Object	reduce(Object collection, Object identity, BiFunction<Object,Object,Object> accumulator)
static Object	reverse(Object collection)
static Object	slice(Object collection, int start, int end)
static Object	sort(Object collection, String property, String order, String nullsPosition, Function<Object,Object> propertyAccessor)
protected static Object	toArrayNode(List<Object> items)
static Iterable<?>	toIterable(Object collection)
static List<Object>	toList(Object collection)
static Object	toResult(Object originalCollection, List<Object> result)	If the original collection was a Jackson ArrayNode, convert the result list back to an ArrayNode.
protected static Object	unwrapJsonNode(org.flowable.common.engine.impl.json.FlowableJsonNode node)	Unwrap a FlowableJsonNode to a Java object.

Methods inherited from class Object

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

Constructor Details

ArrayFunctionUtils

public ArrayFunctionUtils()

Method Details

filter

public static Object filter(Object collection,
 Predicate<Object> predicate)

map

public static Object map(Object collection,
 Function<Object,Object> mapper)

flatMap

public static Object flatMap(Object collection,
 Function<Object,Object> mapper)

find

public static Object find(Object collection,
 Predicate<Object> predicate)

any

public static boolean any(Object collection,
 Predicate<Object> predicate)

all

public static boolean all(Object collection,
 Predicate<Object> predicate)

none

public static boolean none(Object collection,
 Predicate<Object> predicate)

count

public static long count(Object collection,
 Predicate<Object> predicate)

reduce

public static Object reduce(Object collection,
 Object identity,
 BiFunction<Object,Object,Object> accumulator)

indexOf

public static long indexOf(Object collection,
 Predicate<Object> predicate)

includes

public static boolean includes(Object collection,
 Object value)

first

public static Object first(Object collection)

last

public static Object last(Object collection)

isEmpty

public static boolean isEmpty(Object collection)

sort

public static Object sort(Object collection,
 String property,
 String order,
 String nullsPosition,
 Function<Object,Object> propertyAccessor)

append

public static Object append(Object collection,
 List<Object> items)

compact

public static Object compact(Object collection)

concat

public static Object concat(Object collection1,
 Object collection2)

reverse

public static Object reverse(Object collection)

slice

public static Object slice(Object collection,
 int start,
 int end)

pick

public static Object pick(Object collection,
 List<String> propertyNames,
 Function<Object, Function<String,Object>> propertyResolver)

toResult

public static Object toResult(Object originalCollection,
 List<Object> result)

If the original collection was a Jackson ArrayNode, convert the result list back to an ArrayNode. Otherwise return the list as-is.

toArrayNode

protected static Object toArrayNode(List<Object> items)

unwrapJsonNode

protected static Object unwrapJsonNode(org.flowable.common.engine.impl.json.FlowableJsonNode node)

Unwrap a FlowableJsonNode to a Java object. Value nodes (string, number, boolean) are unwrapped to their Java equivalents. Object and array nodes are kept as native Jackson nodes so that property access (e.g., item.name) works via the EL resolver.

isEqual

public static boolean isEqual(Object a,
 Object b)

toList

public static List<Object> toList(Object collection)

toIterable

public static Iterable<?> toIterable(Object collection)