dw.util
Class FilteringCollection
Object
dw.util.Collection
dw.util.FilteringCollection
FilteringCollection is an extension of Collection which provides possibilities to
  • filter the elements to return a new FilteringCollection with a filtered set of elements
  • sort the elements to return a new FilteringCollection with a defined sort order
  • transform the elements to return a new FilteringCollection containing related elements
  • provide a map of the elements against a predefined key

Usage - In the current version each FilteringCollection provides a set of predefined qualifier constants which can be passed into the select(Object) method used to filter the elements. Generally qualifiers have the prefix QUALIFIER_. A second method sort(Object) is used to create a new instance with a different element ordering, which takes an orderB< constant. Generally orderBys have the prefix ORDERBY_: examples are ShippingOrder.ORDERBY_ITEMID, ShippingOrder.ORDERBY_ITEMPOSITION, and ORDERBY_REVERSE can be used to provide a FilteringCollection with the reverse ordering. An example with method ShippingOrder.getItems():

var allItems : FilteringCollection = shippingOrder.items;
var productItems : FilteringCollection = allItems.select(ShippingOrder.QUALIFIER_PRODUCTITEMS);
var serviceItems : FilteringCollection = allItems.select(ShippingOrder.QUALIFIER_SERVICEITEMS);
var byPosition : FilteringCollection = productItems.sort(ShippingOrder.ORDERBY_ITEMPOSITION);
var revByPosition: FilteringCollection = byPosition.sort(FilteringCollection.ORDERBY_REVERSE);
var mapByItemID : Map = allItems.asMap();

Constants
ORDERBY_REVERSE  :  Object
Pass this orderBy with the sort(Object) method to obtain a new FilteringCollection with the reversed sort order. Only use on a FilteringCollection which has been previously sorted.
Constructor Summary
This class does not have a constructor, so you cannot create it directly.
Method Summary
asMap() : Map
Returns a Map containing the elements of this FilteringCollection against a predefined key.
select(qualifier : Object) : FilteringCollection
Select a new FilteringCollection instance by passing a predefined qualifier as an argument to this method.
sort(orderBy : Object) : FilteringCollection
Select a new FilteringCollection instance by passing a predefined orderBy as an argument to this method.
Methods inherited from class Collection
Methods inherited from class Object
Method Detail
asMap
asMap() : Map
Returns a Map containing the elements of this FilteringCollection against a predefined key. The key used is documented in the method returning the FilteringCollection and is typically the ItemID assigned to an element in the collection.
Returns:
a Map containing the elements of this FilteringCollection against a predefined key.

select
select(qualifier : Object) : FilteringCollection
Select a new FilteringCollection instance by passing a predefined qualifier as an argument to this method. See FilteringCollection.
Parameters:
qualifier - - possible qualifiers are documented in the method returning the FilteringCollection
Returns:
a new FilteringCollection instance

sort
sort(orderBy : Object) : FilteringCollection
Select a new FilteringCollection instance by passing a predefined orderBy as an argument to this method. See FilteringCollection.
Parameters:
orderBy - - possible orderBys are documented in the method returning the FilteringCollection
Returns:
a new FilteringCollection instance

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